UTILITY SYSTEMS
Dual Hydrogen Control Panel (DHCP)
Installation and Operation Manual
Top Level Drawing No.: HD0641GXX
Manual No.: HA0156P09 Rev. A
Contents
Introduction .......................................................................................................................................... 6
Specifications ....................................................................................................................................... 7
System Description .............................................................................................................................. 8
Gas Analyzers (Sensor Cells QT-290A, QT-290B, Controller PCB HD0385G03, I/O PCB
HD0417G04, Display PCB HD0403G01) ...................................................................................... 8
Display Panel .................................................................................................................................. 9
Sensor Cell Assembly ...................................................................................................................... 9
Flow Indicators with Metering Valves (FI-2971, FI-2972) ............................................................ 9
Total Gas Flowmeter (FI-2973) ..................................................................................................... 9
Differential Pressure Gage (PDI-292) ............................................................................................ 9
Differential Pressure Transmitter (PDT-292) .................................................................................. 9
Purifiers ........................................................................................................................................ 10
Moisture Indicators (MI-2971, MI-2972, MI-2973) ...................................................................... 10
Metering Valves (HO-2971, HO-2972, HO-2973, HO-2974) ........................................................ 10
Installation ......................................................................................................................................... 11
Cabinet Mounting ......................................................................................................................... 11
Lifting ........................................................................................................................................... 11
Electrical Connections .................................................................................................................. 11
Contacts/Signals ........................................................................................................................... 11
Circuit Protection ......................................................................................................................... 12
System Operation .............................................................................................................................. 13
DHCP Initialization ...................................................................................................................... 13
DHCP Menu Displays ....................................................................................................................... 14
Navigating the LCD Display ........................................................................................................ 14
LCD Menu Display — Two Modes of Operation .......................................................................... 14
Menu Profile ................................................................................................................................. 14
Menu Navigation Tutorial ................................................................................................................. 15
Activating the Menu ..................................................................................................................... 15
Navigating the Menu in Scrolling Mode (Default) ........................................................................ 15
Disabling Scrolling More ............................................................................................................... 15
Navigating the Menu in Non-Scrolling Mode ............................................................................... 15
Function (FN) Menu ..................................................................................................................... 16
Purge Menu ................................................................................................................................... 16
Log Menu ...................................................................................................................................... 16
Setup Menu ................................................................................................................................... 17
Test Menu ...................................................................................................................................... 17
View Menu .................................................................................................................................... 18
1
HA0156P09 Rev. A
Procedures ......................................................................................................................................... 19
Setting the Alarm Level ................................................................................................................ 19
Setting the Warning Level ............................................................................................................. 19
Gas Calibration ............................................................................................................................ 19
About Cell Temperature ................................................................................................................ 19
Hydrogen Calibration ................................................................................................................... 20
Carbon Dioxide Calibration ......................................................................................................... 20
Nitrogen Calibration ..................................................................................................................... 21
About the Faults Log .................................................................................................................... 21
About the Power Log .................................................................................................................... 22
Remote Access .............................................................................................................................. 22
Modes of Operation .......................................................................................................................... 24
Startup .......................................................................................................................................... 24
Startup Problems .......................................................................................................................... 24
Suspended Operation .................................................................................................................... 24
Purge Operation — H2 in CO2 ..................................................................................................... 25
Purge Operation – Air in CO2 ...................................................................................................... 25
Normal Operation ......................................................................................................................... 25
Maintenance ...................................................................................................................................... 26
Daily .............................................................................................................................................. 26
Weekly ........................................................................................................................................... 26
Every Six Months .......................................................................................................................... 26
When the Generator is Down ....................................................................................................... 26
Component Replacement Instructions ............................................................................................. 27
Removing a Gas Analyzer Sensor ................................................................................................. 27
Removing a Processor Circuit Board ............................................................................................ 27
Removing the Input/Output (I/O) Circuit Board ........................................................................... 27
Removing Solenoid Valves Coils ................................................................................................... 28
Removing Moisture Indicators ...................................................................................................... 28
Removing Gas Purifiers ................................................................................................................ 29
Removing Flow Meters ................................................................................................................. 29
HA0156P09 Rev. A
2
Figures
Figure 1 - DHCP Outline ................................................................................................................................... 33
Figure 2 - Piping Schematic ............................................................................................................................... 35
Figure 3 - User Interface Connections .............................................................................................................. 37
Figure 4 - Display .............................................................................................................................................. 39
Figure 5 - Internal Components ......................................................................................................................... 41
Figure 6 - DHCP Display Descriptions ............................................................................................................. 43
Figure 7 - DHCP Status ..................................................................................................................................... 44
Figure 8 - DHCP Customer Contacts ................................................................................................................ 45
Figure 9 - Valve/Switch Configuration, Normal % H2 in Air ............................................................................ 46
Figure 10 - Valve/Switch Configuration, Purge % H2 in CO2 .......................................................................... 46
Figure 11 - Valve/Switch Configuration, Purge % Air in CO2 ........................................................................... 47
Figure 12 - Valve/Switch Configuration, Case ................................................................................................... 47
Figure 13 - Valve/Switch Configuration, Confirmation Mode, Turbine End ....................................................... 48
Figure 14 - Valve/Switch Configuration, Confirmation Mode, Collector End .................................................... 48
Figure 15 - Valve/Switch Configuration, Calibrate N2 (Both Analyzers) .......................................................... 49
Figure 16 - Valve/Switch Configuration, Calibrate CO2 (Both Analyzers) ....................................................... 49
Figure 17 - Valve/Switch Configuration, Calibrate H2 (Both Analyzers) .......................................................... 50
Figure 18 - Valve/Switch Configuration, Calibrate N2 (Turbine End) ............................................................... 50
Figure 19 - Valve/Switch Configuration, Calibrate N2 (Collector End) ............................................................. 51
Figure 20 - Valve/Switch Configuration, Calibrate CO2 (Turbine End) ............................................................. 51
Figure 21 - Valve/Switch Configuration, Calibrate CO2 (Collector End) .......................................................... 52
Figure 22 - Valve/Switch Configuration, Calibrate H2 (Turbine End) ............................................................... 52
Figure 23 - Valve/Switch Configuration, Calibrate H2 (Collector End) ............................................................. 53
Figure 24 - Parts List ......................................................................................................................................... 54
3
HA0156P09 Rev. A
HA0156P09 Rev. A
4
Dual Hydrogen Control Panel (DHCP) System
Important Information
THIS EQUIPMENT OPERATES AT VOLTAGE LEVELS THAT CAN BE HAZARDOUS TO
PERSONNEL. READ THE SECTION ABOUT SAFETY CONSIDERATIONS BEFORE
INSTALLING OR SERVICING.
THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS
IN EQUIPMENT NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET
IN CONNECTION WITH INSTALLATION, OPERATION OR MAINTENANCE.
SHOULD FURTHER INFORMATION BE DESIRED, OR SHOULD PARTICULAR PROBLEMS ARISE THAT ARE NOT COVERED SUFFICIENTLY FOR THE PURCHASER’S
PURPOSES, REFER THE MATTER TO ENVIRONMENT ONE CORPORATION.
IT IS THE RESPONSIBILITY OF SITE MANAGEMENT TO ASSURE THAT ONLY TRAINED/
QUALIFIED PERSONNEL OPERATE AND/OR SERVICE THIS EQUIPMENT.
PROPER PIPING PRACTICES ARE TO BE OBSERVED TO AVOID POTENTIAL OIL
CONTAMINATION OF THE SENSOR CELL. SHOULD CONTAMINATION OCCUR, ANALYZER OUTPUT MAY NOT CORRESPOND TO DESIGN SPECIFICATIONS. CONTACT
ENVIRONMENT ONE FOR SUPPORT.
Dual Hydrogen Control Panel (DHCP) System
Safety Considerations
THE SYSTEM ELECTRONICS ENCLOSURE AND CUSTOMER INTERFACE ENCLOSURE
CONTAIN 115 AND OR 230 VOLTS AC. THIS VOLTAGE APPEARS AT THE AC POWER
STRIP AND VARIOUS OTHER POINTS. EQUIPMENT OPERATION INVOLVES A
FLAMMABLE GAS (HYDROGEN) UNDER PRESSURE. APPROPRIATE MEASURES MUST
BE TAKEN TO PREVENT LEAKS AND AVOID SOURCES OF IGNITION.
WHEN ALL ELECTRICAL CONNECTIONS TO THE SYSTEM ELECTRONICS, SENSOR
AND DISPLAY PANEL ARE COMPLETED AND TESTED, ENSURING THAT ALL SEAL
FITTINGS ARE FILLED WITH AN APPROVED COMPOUND IS NECESSARY. THIS IS A
NATIONAL ELECTRICAL CODE REQUIREMENT FOR CLASS 1, DIVISION 1, GROUP B
ENVIRONMENTS (NEC 501-5).
ALL WIRING MUST BE IN ACCORDANCE WITH LOCAL CODES. ALL GAS
CONNECTIONS TO THE PANEL MUST BE LEAK CHECKED PRIOR TO APPLYING AC
POWER.
CHECK FOR LEAKS AT ALL TUBING AND MECHANICAL CONNECTIONS. IF LEAKS ARE
FOUND, DETERMINE THE CAUSE AND REPAIR. REPEAT THE LEAK CHECK UNTIL THE
PANEL IS DETERMINED TO BE LEAK TIGHT.
5
HA0156P09 Rev. A
Introduction
Modern high capacity turbine generators use hydrogen gas as a cooling medium. Two
reasons for using hydrogen are 1) hydrogen has the best heat transfer characteristics of any
gas; and 2) the low atomic weight of hydrogen makes it the lightest and, therefore, has the
lowest density of any stable gas (10 percent that of air at a purity of 98 percent), resulting in
the lowest windage losses.
The hydrogen auxiliary system exists to maintain the quality and quantity of cooling gas
required to ventilate the conducting and rotating parts of hydrogen cooled generators. Gland
seals are used to prevent hydrogen leakage through the clearance between the shaft and the
frame.
In order to maintain hydrogen gas purity of approximately 98 percent, some generators use a
seal gland system, where a small quantity of hydrogen gas is continuously scavenged from
two (collector end and turbine end) seal drain enlargements and discharged into the atmosphere.
The Dual Hydrogen Control Panel (DHCP) contains two independent Generator Gas Analyzers (GGA’s) and circuitry to control the rate of scavenging in order to maintain high gas purity.
Environment One’s microprocessor-controlled Generator Gas Analyzer (GGA), with its triplerange sensor cell, is capable of measuring 70 to 100 percent H2 in Air, 0 to 100 percent H2 in
CO2 and 0 to 100 percent Air in CO2.
Each GGA continuously analyzes the generator cooling gas, displays gas purity in real time
and has a corresponding 4 to 20 mA output. In the event that the gas purity falls to a warning
or alarm level, a visual indication is given and alarm contacts are switched.
The GGA’s triple-range sensor cell also monitors purge gases used during generator shutdown and maintenance. Purge gas purity is displayed and a corresponding 4 to 20 mA output
is provided for H2 in CO2 or Air in CO2.
HA0156P09 Rev. A
6
Specifications
Input Voltage
(See Nameplate)
120 Vac 50/60 Hz
220 Vac 50/60 Hz (optional)
Ambient Temperature
32 F to 158 F (0 C to 70 C)
Maximum Pressure
100 psi
Ambient Location
Class 1, Division 1, Group B
Gas Analyzer
Sensing Unit
Switchable — Triple Range
(70-100% H2 in Air)
(0-100% H2 in CO2)
(0-100% Air in CO2)
Accuracy
+/- 1% of full scale @ 80-100% H2 in Air
Outputs
4-20 mA current output
Alarm Levels
Alarm and Warning levels are adjustable
Relay Contact Rating
30V/1A DC 120V/0.5A AC
125V/0.005A (Resistive) DC
Data Retention
Lithium battery-supported RAM, 10 years minimum
Indicators
AC power, Trouble, Normal (H2 in Air), Purge (H2 in
CO2), Purge (Air in CO2), Calibrate H2, Calibrate
CO2, Calibrate N2, One 3-character LED numeric
display, One 16-character LCD display
Weight
475 lbs (standard)
1,100 lbs (NEMA 3R)
Dimensions
17” d x 64 3/4” h x 36” w (standard)
27.5” d x 72” h x 42” w (NEMA 3R)
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HA0156P09 Rev. A
System Description
The Dual Hydrogen Control Panel (DHCP) is designed for use on hydrogen-cooled generators. It is designed to operate in Class 1, Division 1, Group B hazardous areas. The DHCP
analyzes and, in real time, displays the hydrogen gas purity on built-in numeric displays.
The major components of the DHCP include:
•
2 completely independent, generator gas analyzers (GGA)
•
2 hydrogen gas flow indicators with metering valves
•
1 total hydrogen gas flow indicator
•
1 fan differential pressure transmitter and gage
•
3 hydrogen gas purifiers
•
3 moisture indicators
•
4 metering valves
•
Numerous isolation valves
•
2 local display panels that indicate gas purity and specific operating conditions
Gas Analyzers (Sensor Cells QT-290A, QT-290B, Controller PCB
HD0385G03, I/O PCB HD0417G04, Display PCB HD0403G01)
Analyzers and their printed circuit boards (PCBs) are interchangeable. Each analyzer is
comprised of a sensor cell, controller PCB, an I/O PCB and a Display panel. Sensor cells,
controller PCB’s and I/O PCB’s are housed in the main junction box (Figure 5); local display
panels are mounted on the front of the panel (Figure 1).
Each analyzer independently provides purity monitoring, calibration, mode selection, sensor
unit control, alarm electronics, data logging, system inputs/outputs and sensing unit
linearization. See Figure 6 for display panel features and functions.
Fail-safe operation of the Gas Analyzers is ensured by:
1. On power-up the GGA must execute and pass qualifying self tests. Failure in any test
results in termination of operation and annunciation of the condition causing the failure.
2. Following power-up and/or system reset, the GGA is continuously supervised by an
independent watchdog monitor that serves to reset it should its operation become erratic.
3. The GGA is completely self-supervised and continuously checks itself for legal processor
functioning, internal voltages, analog-to-digital conversion accuracy, integrity of cabling
and relay operation. Any faults are immediately annunciated as “trouble” on the display
and accompanied by a change in the corresponding relay state.
HA0156P09 Rev. A
8
Display Panel
The Display Panel provides control of all functions of the GGA as well as complete annunciation of the status of the GGA (Figure 4). Functions are accessed by means of a four-button
membrane-switch keypad and 16-character Liquid Crystal Display (LCD). See GGA Menu
Display for a description of the menu.
The Display Panel provides Light Emitting Diodes (LEDs) to annunciate the Normal (H2 in
air), Purge (H2 in CO2 and air in CO2), and Calibrate (H2, CO2 and N2) GGA states. In
addition, they indicate Warning, Alarm and Trouble conditions. A green LED indicates AC
Power.
To permit a system level initialization (“cold start”), a momentary push-button, located behind
the Display Panel (Figure 4) in the upper right hand corner, may be pressed. Since all calibration constants are stored in non-volatile memory, these values will not be lost should the
system be initialized or should it lose, then regain, AC power.
Sensor Cell Assembly
The sensor cell assembly is comprised of a sampling thermistor and a reference thermistor
— both operated at very low power in a self-heated mode — embedded in a temperatureregulated cell block. Gas purity is derived as a function of the thermal conductivity of the gas
mixture to the heat output of the thermistors under known constraints.
Flow Indicators with Metering Valves (FI-2971, FI-2972)
Two low-flow gas indicators with needle metering valves are used to adjust the hydrogen gas
flow through each sensing unit (Analyzer 1 and Analyzer 2, Figure 2). Both have a direct read
scale with a range of 100 to 900 cc/min, calibrated with hydrogen.
Note: Flow indication changes with different gases. For hydrogen, the flow should be set for
500 cc/min.
Total Gas Flowmeter (FI-2973)
A high flow gas indicator is used to indicate the scavenging flows (Total Flow, Figure 2). The
high flow gas indicator has a direct read scale with a range of 300 to 5,500 cc/min when
calibrated with hydrogen.
Note: Flow indication changes with different gases. Metering valves adjust the flow of the
collector end low flow, collector end high flow, turbine end low flow and turbine end high flow.
See Flow Calibration for flow settings.
Differential Pressure Gage (PDI-292)
A differential pressure gage measures the generator fan differential pressure (Figure 2). The
standard differential pressure gage has dual scales with ranges of 0 to 30 inches H2O and 0
to 76.2 gm/cm2. Some units may be equipped with special gage scales.
Differential Pressure Transmitter (PDT-292)
A differential pressure transmitter provides an output signal corresponding to the generator
fan differential pressure (Figure 2). This 4 to 20 mA output is externally provided by the
9
HA0156P09 Rev. A
Mark V or Mark VI and corresponds to 0 to 30 inches H2O. Some units may be equipped
with a special range.
Purifiers
Three gas purifiers remove foreign matter from the hydrogen stream (Turbine End Purifier,
Case Purifier, Collector End Purifier; Figure 2). Removal of oil, water and particles above 12
microns is accomplished through the use of molecular sieve materials and special filters.
The filters are available in replaceable cartridges, HA0139P02.
Moisture Indicators (MI-2971, MI-2972, MI-2973)
Three moisture indicators indicate the downstream presence of moisture in the hydrogen
stream (Turbine End Moisture, Collector End Moisture, Case Moisture; Figure 2). The units
are supplied with a dyed silica gel, which gradually changes from blue (at relative humidity
less than 4 percent) to pink (at relative humidity higher than 40 percent). These devices are
replaceable.
Metering Valves (HO-2971, HO-2972, HO-2973, HO-2974)
Four needle metering valves provide adjustment for the scavenging flow rates (Collector End
Low Flow, Turbine End Low Flow, Collector End High Flow, Turbine End High Flow; Figure 2).
See Flow Calibration for flow settings.
HA0156P09 Rev. A
10
Installation
Follow the installation instructions to ensure proper installation of the equipment. The exact
location of the DHCP should be in accordance with the recommendations made by General
Electric or its authorized representative.
Cabinet Mounting
Choose a location that is not subject to extremes of dust, temperature, vibration or shock.
The panel should be accessible for service, with adequate clearance to open the enclosure
and display panel doors (Figure 1). The DHCP has four foundation bolt openings. The
openings allow you to insert four 5/8-inch bolts for securing the panel to the floor. The bolts
are isolated from the panel through the use of compression vibration insulators. Use
fasteners that are compatible with the mounting surface and able to support the weight of the
panel. Lifting bolts at the top of the panel allow for easy connection to overhead cranes.
Lifting
The DHCP should be lifted by the pair of eye bolts provided at the top of the frame.
Electrical Connections
Prior to applying power to the DHCP unit, ensure that the local power source matches the
power rating on the DHCP nameplate.
The DHCP unit is shipped with all isolation and metering valves closed. All gas lines must be
connected to the DHCP and leak-tested before continuing.
Electrical connections are made through four 3/4-inch male conduit unions at the bottom or
top of the panel (Figure 1). System power requirements are 120 or 220 Volts AC (systems
are supplied for specifically 120 V or 220 V). The AC power source should be reliable and not
subject to severe transients. Total load max.: 400 watts.
Electrical connections, located inside of the main junction box, are accessed by removing 32
3/4” hex captive bolts. Two guide studs are provided for assistance in removal/replacement.
CAUTION! Do not scratch sealing surfaces on the main junction box. The main
junction box lid weighs 50 lbs (22.7 kg). Take precautions during removal. Prior to
opening the main junction box, remove power from the DHCP and ensure the system
is free of hydrogen.
Wire routing should be in accordance with Figure 3. This ensures that noise generated from
the AC power and contacts does not interfere with the signals. Connections are made to
shunt boards (Figure 3).
Contacts/Signals
The DHCP includes alarm and status relays (Figures 3, 7, 8). They are:
•
Warning Relay Both a normally open and a normally closed contact (single pole, double
throw configuration) is provided and a warning is signaled by an energized relay.
11
HA0156P09 Rev. A
(Contact/Signals cont’d)
•
Alarm Relay Both a normally open and a normally closed contact (single pole, double
throw configuration) is provided and an alarm is signaled by an energized relay.
•
Trouble Relay Both a normally open and a normally closed contact (single pole, double
throw configuration) is provided and Trouble is signaled by a de-energized relay.
•
4-20 mA output signals are provided for Analyzer #1, Analyzer #2 and the DP Transmitter
(Figure 3).
•
The 4-20 mA signals for Analyzer #1 and Analyzer #2 correspond to 70 to 100 percent in
Normal mode (H2 in air) and 0 to 100 percent in Purge modes (H2 and CO2 & Air in
CO2).
•
Analyzer #1 and Analyzer #2’s output signals are internally powered. These signals
are not to be powered by the Mark V, Mark VI.
•
The 4-20 mA signal for the DP Transmitter is powered by the Mark V, Mark VI.
See Figure 3 for locations of signals on terminal block. See Figures 7 and 8 for description of
conditions where relays are activated.
Circuit Protection
Each GGA is individually fused. A half-amp slo-blo fuse, located on the Input/Output PCB,
provides circuit protection.
HA0156P09 Rev. A
12
System Operation
The DHCP’s main purpose is to analyze and display the hydrogen gas purity of hydrogen
cooled generators. This section describes system operation.
DHCP Initialization
With system power on, press the RESET push-button on the backside of the Display Panel
(Figure 4).
The GGA Display Panel will respond with (a) all discrete LEDs lit; (b) all segments and the
tenths place decimal point of the GAS PURITY display lit; and (c) all pixels of the LCD display
on.
Once communication has been established with the rest of the system, (a) all discrete
LED’s, except AC POWER and TROUBLE, will turn off; (b) all segments of the Gas Purity
display will turn off; and (c) the display will echo the results of cold-start initialization.
•
GGA Ver 2.1A-7
•
CHECKSUM OK
•
POWER OK
•
I/O BOARD OK
•
RELAY TEST …
•
… PASSED
•
CALIBRATE ADC
•
ADC CALIBRATED
•
Tcell = XX.X°C (where XX.X is the instantaneous cell block temperature). For an indeterminate period (normally not exceeding 15 minutes for a cold start), the LCD will display
the real-time temperature of the sensor cell block. When the temperature rises to the cell
calibration temperature (55.0°C to 65.0°C), the system will advance and the display will
indicate:
•
NORMAL (H2/AIR), CONFIGURE VALVES. In response to this prompt, permit the sample
gas to flow through the sensor then press the ENTER key. This is the NORMAL mode of
operation. See Normal for more information.
For a first time installation, it is essential that a gas sensor calibration be performed on the
system. Also, the faults log should be cleared. See Calibration under the Setup Menu and
Clear Faults Log under Log Menu for specific information.
13
HA0156P09 Rev. A
DHCP Menu Displays
The following sections provide definitions and user information regarding the various menus
that are accessible via the DHCP’s LCD display. It is strongly recommended that users
familiarize themselves with this section. Additional questions can be forwarded to Environment One Corporation.
Navigating the LCD Display
Four keys are used to control menu operation: FN, ENTER, UP ARROW and DOWN ARROW.
•
The FN key activates and exits the menu.
•
The ENTER key selects an item from the menu.
•
The UP ARROW and DOWN ARROW keys change the selection displayed.
LCD Menu Display — Two Modes of Operation
The menu has two modes of operation, scrolling and non-scrolling.
•
In scrolling mode, the selection shown on the LCD changes automatically every two
seconds.
•
In non-scrolling mode, the UP ARROW and DOWN ARROW keys must be used to
change the selection.
Scrolling is the default mode. Users can change modes by reviewing the SETUP MENU
section in the following pages.
Menu Profile
Six menus are available: Function, Log, Purge, Setup, Test and View. The Function menu is
the top-level menu; all other menus are accessed through this menu.
HA0156P09 Rev. A
14
Menu Navigation Tutorial
Activating the Menu
1. Press FN to start the menu. The LCD should display the prompt FUNCTION MENU.
2. Press FN again to turn off the menu.
Navigating the Menu in Scrolling Mode (Default)
1. Press FN to start the menu. The LCD should display the prompt FUNCTION MENU. After
two seconds, the prompt should change to GO TO LOG MENU.
2. Wait until the prompt GO TO LOG MENU appears and press the ENTER key.
3. The LCD should display the prompt <LOG MENU>.
4. Wait until the prompt SHOW PROGRAM ID appears and press the ENTER key. The
display should show GGA VER 2.1A-7.
5. Press the FN key. The prompt will be restored to SHOW PROGRAM ID.
6. Press FN again. The prompt will be restored to GO TO LOG MENU.
7. Press FN a third time. The LCD will display GGA BY E/ONE as the menu is deactivated.
Disabling Scrolling More
1. Press FN to start the menu.
2. Wait until the prompt shows GO TO SETUP MENU and press ENTER.
3. Wait until the prompt shows SET SCROLL OFF and press ENTER.
4. The prompt will flash SET SCROLL OFF.
5. Press FN to return to the beginning of the menu.
Navigating the Menu in Non-Scrolling Mode
1. The LCD should display the prompt FUNCTION MENU. Press the DOWN ARROW key
until the prompt shows GO TO LOG MENU and press the ENTER key.
2. The LCD should display the prompt LOG MENU. Press the DOWN ARROW key until the
prompt shows SHOW PROGRAM ID and press the ENTER key. The display should
show GGA VER 2.1A-7.
3. Press the FN key. The prompt will be restored to SHOW PROGRAM ID.
4. Press FN again. The prompt will be restored to GO TO LOG MENU.
5. Press FN a third time. The LCD will display GGA BY E/ONE.
15
HA0156P09 Rev. A
Function (FN) Menu
•
GO TO LOG MENU Select this item to enter the Log menu. The Log menu contains
selections to view and clear the fault and power logs. The Log menu also includes a
selection to view the software version number.
•
GO TO PURGE MENU Select this item to enter the Purge menu. The Purge menu
includes selections to change to a different range for purge operations. The available
alternate ranges are hydrogen in carbon dioxide and air in carbon dioxide.
•
GO TO SETUP MENU Select this item to enter the Setup menu. The Setup menu
includes selections for calibration and configuration. Items that an be configured include
the Warning level, Alarm level, operating mode and menu scroll rate. The Setup menu
also includes selections to calibrate the reference values for hydrogen, nitrogen and
carbon dioxide.
•
GO TO TEST MENU Select this item to enter the Test Menu. The Test Menu contains
selections to test the power supplies, keypad, relays and the 4 to 20 mA outputs.
•
GO TO VIEW MENU Select this item to enter the View menu. The View menu contains
selections to view the calibration constants, cell temperature, thermistor voltages, A/D
converter voltages and internal registers.
Purge Menu
•
PURGE (H2/CO2) Select this item to change the range from hydrogen in air to hydrogen
in carbon dioxide. See Purge Operation for more information.
•
PURGE (AIR/CO2) Select this item to change the range from hydrogen in air to air in
carbon dioxide. See Purge Operation for more information.
Log Menu
•
SHOW FAULTS LOG Select this item to view the Faults log. See About the Faults Log
for more information.
•
CLEAR FAULTS LOG Select this item to clear the Faults log. When selected, the
CLEAR FAULTS LOG prompt will flash for two seconds before clearing the Faults log. If
the FN key is pressed while the prompt is still flashing, clearing the log will be canceled.
See About the Faults Log for more information.
•
SHOW POWER LOG Select this item to view the Power log. See About the Power Log
for more information.
•
CLEAR POWER LOG Select this item to clear the Power log. When selected, the
CLEAR POWER LOG prompt will flash for two seconds before clearing the Power log. If
the FN key is pressed while the prompt is still flashing, clearing the log will be canceled.
See About the Power Log for more information.
•
SHOW PROGRAM ID Select this item to display the program identification and revision
level in the format GGA Rev. X.X. This manual was written for software version 2.1A.
Press the UP arrow key to access additional version information. The next prompt gives
the I/O board version in the format I/O VERSION X.XX. The last prompt gives the control-
HA0156P09 Rev. A
16
(Log Menu cont’d)
ler board part number in the format PROC=XXXXXXGXX. This manual was written for
controller board P/N HA0385G03 (standard). Press the FN key to return to the Log menu.
Setup Menu
•
GAS CALIBRATION Select this item to calibrate the GGA with hydrogen, nitrogen or
carbon dioxide gas. See Gas Calibration for more information.
•
PURITY COMP Select this item to enter a cell compensation value.
•
WARNING LEVEL Select this item to change the Warning level. See Setting the Warning
Level for more information.
•
ALARM LEVEL Select this item to change the Alarm level. See Setting the Alarm Level
for more information.
•
ADVANCED Select this item to setup the GGA for remote access. See Remote Access
for more information.
•
STOP MONITORING This item is to be used for troubleshooting and is displayed when
the monitoring is turned on. Select this item to turn off monitoring. When selected, the
STOP MONITORING prompt will flash STOPPING for two seconds before monitoring is
suspended. If the FN key is pressed while it is flashing, the command will be canceled.
See Suspended Operation for more information.
•
START MONITORING This item is displayed when the scrolling is turned on. Select this
item to turn monitoring on. When selected, the START MONITORING prompt will flash
STARTING for two seconds before monitoring begins. If the FN key is pressed while the
prompt is flashing, the command will be canceled. See Normal Operation for more
information.
•
SET SCROLL OFF This item is displayed when the scrolling is turned on. Select this
item to turn off scrolling. When scrolling is inactive, the displayed menu items will not
change until a menu key (UP ARROW, DOWN ARROW, FN or ENTER) is pressed.
•
SET SCROLL ON This item is displayed when the scrolling is turned off. Select this item
to turn on scrolling. When scrolling is active, the displayed menu items will change once
every two seconds.
Test Menu
•
CONTACT TEST Select this item to start an interactive test of the relay contacts. The
GGA will place all relays except one in a de-energized condition. The LCD will display the
name of the single relay that is still energized. Use the arrow keys to change which relay
is energized. Press the FN or ENTER keys to terminate the test.
•
KEYPAD TEST Select this item to start an interactive test of the keypad. The LCD will
display the prompt PRESS ANY KEY at the start of the test. Test the keypad by pressing,
one at a time, all of the keys on the keypad, reserving the FN key for last. The LCD will
echo the name of each key as it is pressed. The test will terminate when the FN key is
pressed.
•
OUTPUT TEST Select this item to start an interactive test of the 4- to 20 mA outputs.
17
HA0156P09 Rev. A
(Test Menu cont’d)
The GGA will clear the numeric displays, set the 4- to 20 mA outputs to 4 mA and display
CURRENT=4 mA on the LCD display at the start of the test. Use the arrow keys to
increase or decrease the current in 1 mA steps. Press FN or ENTER to terminate the
test.
•
POWER TEST Select this item to test the power supplies. When Power Test is selected,
the GGA will display the voltage for each power supply in the format <nominal
value>=<present value>. An example of the 12-volt power supply is +12 VOLTS=12.1.
The GGA will scroll through all five power supply voltages. The voltages are displayed for
two seconds each.
•
RELAY TEST Select this item to test all of the relays. The LCD will display RELAY
TEST… The system will cause each relay to be energized. If no errors are detected, the
LCD will display RELAYS PASS. If an error is detected, the LCD will display the failure
mode and then list the names of the malfunctioning relays. The failure modes are
STUCK ON and STUCK OFF. See Figure 6 for a list of the probable cause(s) of the
error(s).
View Menu
•
VIEW CALIBRATION Select this item to display the calibration values for the sensor cell.
The format for the first four displayed values is “Vnn=X.XXX VDC” where Vnn is the
symbol and X.XXX is the voltage of a calibration constant. The symbols for the four
calibration constants are: Vref for the reference thermistor; Vn2 for nitrogen gas; Vh2 for
hydrogen gas; and Vco2 for carbon dioxide. Use the UP ARROW key or DOWN ARROW
key to scroll through the calibration constants. Press the FN key to return to the Vie
menu. Two additional values can be displayed with view calibration. These last two
values are the purity compensation factor and the cell calibration temperature.
•
VIEW TCELL Select this item to view the cell temperature in real time. The temperature
is displayed in the format “Tcell=XX.XC” where XX.X is the temperature in degrees
centigrade.
•
VIEW CELL VOLTS Select this item to view the thermistor voltages in real time. The
voltages are displayed in the format s=X.XXX r=X.XXX where s stands for the sample
thermistor and r stands for the current value of the reference thermistor voltage.
•
VIEW 12BIT ADC Select this item to display the voltage at each of the four inputs to the
12-bit A/D converter. Use the UP ARROW or DOWN ARROW to scroll through all four
channels. Press the FN key to return to the View menu.
•
VIEW REGISTER Select this item to display the values in the internal registers. Use the
UP ARROW to view the next register or the DOWN ARROW to view the previous one.
Press the FN key to return to the View menu.
HA0156P09 Rev. A
18
Procedures
Setting the Alarm Level
The Alarm level determines what ratio of hydrogen to air will trigger an Alarm indication. The
alarm level is expressed as a percent. An Alarm indication is given when the purity drops
below the value of the alarm level and remains there for at least one minute after a Warning
is indicated. An Alarm will only occur if the GGA is in Normal mode. The factory default value
for the alarm level is 85 percent. The Alarm level can be changed by selecting ALARM LEVEL
from the Setup menu.
When ALARM LEVEL is selected, the Alarm level will be displayed on the LCD display. Press
the UP ARROW to increase the level; press the DOWN ARROW to decrease the level. The
level cannot be increased beyond the Warning level or decreased below 80 percent. Press
the ENTER key to save your changes and return to the Setup menu. Press the FN key to
discard changes and return to the Setup menu.
Setting the Warning Level
The Warning level determines what ratio of hydrogen to air will trigger a WARNING indication.
The Warning level is expressed in percent. A WARNING indication is given when the purity
drops below the value of Warning level and remains there for at least one minute. A WARNING will only occur if the GGA is in normal mode. The factory default value for the Warning
level is 90 percent. The Warning level can be changed by selecting WARNING LEVEL from
the Setup menu.
When WARNING LEVEL is selected, the Warning level will be displayed on the LCD display.
Press the UP ARROW key to increase the level; press the DOWN ARROW key to decrease
the level. The Warning level cannot be increased beyond 99 percent or decreased below the
Alarm level. Press the ENTER key to save your changes and return to the Setup menu.
Press the FN key to discard the changes and return to the Setup menu.
Gas Calibration
Calibrate each of the two gas analyzer units separately.
Select the GAS CALIBRATION option on the SETUP menu to begin gas calibration. There
are three operations available through the GAS CALIBRATION SETUP menu. The operations
are:
•
CALIBRATE H2 Select this item to calibrate the GGA with 100 percent hydrogen gas.
•
CALIBRATE CO2 Select this item to calibrate the GGA with 100 percent carbon dioxide
gas.
•
CALIBRATE N2 Select this item to calibrate the GGA with 100 percent nitrogen gas.
About Cell Temperature
The cell is designed to operate with an internal block temperature between 55 C and 70 C;
generally, the cell is configured to operate at 55 C. However, if the equipment is intended for
operation at ambient temperatures above 55 C, the cell temperature will be set to 65 C.
19
HA0156P09 Rev. A
(About Cell Temperature cont’d)
The GGA accommodates the different cell temperatures by recording a cell calibration
temperature each time it is calibrated. The process is invisible as long as the cell temperature is the same each time (±1 C).
The Tc=XX.X°C (YY.Y) prompt appears instead of CALIBRATE XX, CONFIGURE VALVES
when the actual cell operating temperature does not match the cell temperature calibration
value. The first value is the actual cell temperature in degrees centigrade. The second value,
in parenthesis, is the cell calibration temperature. Correct this condition by changing the cell
temperature or the calibration temperature.
The cell temperature is changed by adjusting the cell temperature trim pot. Give the cell
temperature several minutes to stabilize between adjustments.
The calibration temperature is changed by pressing the enter key while the Tc=XX.X°C (YY.Y)
prompt is visible. The GGA will respond with the prompt “?ERASE CAL INFO?”. Press the
enter key to complete the operation and set the calibration temperature to the current cell
temperature (XX.X°C). The GGA must be calibrated with all three calibration gases after
changing the calibration temperature.
Hydrogen Calibration
1. Begin hydrogen gas calibration by selecting CALIBRATE H2 from the Setup menu.
2. In response to the prompts CALIBRATE H2, CONFIGURE VALVES, permit the hydrogen
calibration gas to flow through the sensor. See About Cell Temperature if the Tc=XX.X°C
(YY.Y) prompt appears.
3. The LCD will display the voltage output of the reference cell sensor in the format
Vref=X.XXX VDC. Press the FN key to cancel the calibration at this point, if desired; this
will permit a return to the main menu. If desired to continue the calibration, observe the
reference voltage and, if it appears stable (i.e., a final change of not greater than 1 to 2
mV per minute), press the ENTER key.
4. The LCD will display the voltage output of the sample cell sensor in the format
“Vcell=X.XXXVDC.” Again, the calibration may be terminated by pressing FN. If it is
continued, observe the sample cell voltage as it adjusts to the flowing H2 calibration span
gas. When it appears stable (i.e., a final change of not greater than 1 mV per minute,
which occurs within approximately 15 minutes) press the ENTER key. The LCD will
display H2 CALIBRATED. This concludes H2 calibration.
The display will scroll the prompts CALIBRATE H2, CALIBRATE CO2 and CALIBRATE N2.
Press the Fn key on the GGA to return to the main menu or wait until the display scrolls to the
prompt CALIBRATE CO2 and press the ENTER key to continue gas calibration.
Carbon Dioxide Calibration
1. Begin carbon dioxide gas calibration by selecting CALIBRATE CO2 from the Setup
menu.
2. In response to the prompts CALIBRATE CO2, CONFIGURE VALVES, permit the CO2
calibration gas to flow through the sensor. See About Cell Temperature if the Tc=XX.X°C
(YY.Y) prompt appears.
HA0156P09 Rev. A
20
(Carbon Dioxide Calibration cont’d)
3. The LCD will display the voltage output of the reference cell sensor in the format
Vref=X.XXX VDC. If desired to cancel the calibration at this point, press the Fn key; this
will permit a return to the main menu. If desired to continue the calibration, observe the
reference voltage and, if it appears stable (i.e., a final change of not greater than 1 to 2
mV per minute), press the ENTER key.
4. The LCD will display the voltage output of the sample cell sensor in the format
Vcell=X.XXX VDC. Again, the calibration may be terminated by pressing FN. If it is continued, observe the sample voltage as it adjusts to the flowing CO2 calibration zero gas.
When it appears stable (i.e., a final change of not greater than 1 to 2 mV per minute,
which occurs within approximately 15 minutes), press the ENTER key. The LCD will
display CO2 CALIBRATED. This concludes CO2 calibration.
The display will scroll the prompts CALIBRATE H2, CALIBRATE CO2 and CALIBRATE N2.
Press the Fn key on the GGA to return to the main menu or wait until the display scrolls to the
prompt CALIBRATE N2 and press the ENTER key to continue gas calibration.
Nitrogen Calibration
1. Begin nitrogen gas calibration by selecting CALIBRATE N2 from the Setup menu.
2. In response to the prompts CALIBRATE N2, CONFIGURE VALVES, permit the nitrogen
calibration gas to flow through the sensor. See About Cell Temperature if the Tc=XX.X°C
(YY.Y) prompt appears.
3. The LCD will display the voltage output of the reference cell sensor in the format
Vref=X.XXX VDC. If desired to cancel the calibration at this point, press the Fn key; this
will permit a return to the main menu. If desired to continue the calibration, observe the
reference voltage and, if it appears stable (i.e., a final change of not greater than 1 to 2
mV per minute) press the ENTER key.
4. The LCD will display the voltage output of the sample cell sensor in the format
Vcell=X.XXX VDC. Again, the calibration may be terminated by pressing Fn. If it is continued, observe the sample voltage as it adjusts to the flowing N2 calibration zero/span gas.
When it appears stable (i.e., a final change of not greater than 1 to 2 mV per minute,
which occurs within approximately 15 minutes) press the ENTER key. The LCD will
display N2 CALIBRATED. This concludes N2 calibration.
Press the Fn key to return to the main menu. This concludes the gas sensor calibration of
the GGA system.
About the Faults Log
The Faults log traps these error conditions: I/O Fault, COMM Fault, TCELL Fault, CAL Fault
and Power Fault.
•
An I/O Fault is logged when a communication error is detected in the communication
channel that connects the processor with the relay outputs.
•
A COMM Fault is logged when a communication error is detected in the communication
channel that connects the processor to the Display or I/O board.
•
A Tcell Fault is logged when the temperature of the sensor cell drifts out of specification
21
HA0156P09 Rev. A
(Faults Log cont’d)
during normal operating mode.
•
A Power Fault is logged when the measured voltage of one or more of the power supplies is out of specification.
•
A 12 BIT ADC FAULT is logged when the 12 bit ADC converter fails calibration on the first
attempt.
•
A Cal Fault is logged when one of the following conditions occurs:
a. The Hydrogen calibration value is less than 2.5 volts or greater than 4.094 volts.
b. The Nitrogen calibration value is less than 1 volt or greater than 2.5 volts.
c. The real time cell voltage is at least three percent above the hydrogen calibration
value and the analyzer is in Normal mode.
d. The real time cell voltage is at least three percent below the nitrogen calibration value
and the analyzer is in Normal mode.
About the Power Log
The Power log records the minimum and maximum voltage of each power supply. The
voltage is sampled once every two seconds.
When SHOW POWER LOG is selected, the GGA will display the minimum and maximum
for each power supply in the format <nominal value>=<minimum value>, <maximum value>.
An example for the 12-volt power supply is +12V=11.8,12.1. Use the UP ARROW key or
DOWN ARROW key to scroll through the five power supply voltages. Press the FN key to
return to the Log menu.
Remote Access
The GGA can be controlled from the local display located on the front of the instrument or
from a remote display located in the control room or some other convenient location.
Control can be transferred from the local to the remote display using the keypad. First press
the FN key. The instrument will respond with a password request. Enter the four digit password by pressing the up arrow key to increase the lowest digit and the down arrow to shift
the number to the left. (for example press the up arrow once, the down arrow once, the up
arrow twice, the down arrow once, and the up arrow three times to enter the password 123).
Press enter; the instrument will respond with “ACCEPTED”. You now have control of the
instrument.
Settings for remote operation can be reached by selecting the ADVANCED option on the
Setup menu. There are four options available in the Advanced Setup menu. The options are:
•
SET PASSWORD Select this item to change the remote access password.
•
SET ADDRESS Select this item to change the instrument remote access address.
•
SET BAUD RATE Select this item to change the baud rate of the I/O board serial port.
•
RESET I/O Select this item to reset the I/O board.
HA0156P09 Rev. A
22
(Remote Access cont’d)
When SET PASSWORD is selected, “0000” will be displayed on the LCD display. (The
current password is not displayed). Enter a four digit password by pressing the UP ARROW
key to increase the lowest digit and the DOWN ARROW to shift the number to the left. (for
example press the UP ARROW once, the DOWN ARROW once, the UP ARROW twice, the
DOWN ARROW once, and the UP ARROW three times to enter the password 123). Press
the ENTER key to save the password and return to the Advanced menu. Press the FN key to
leave the original password unchanged and return to the Advanced menu.
When SET ADDRESS is selected, the current address will be displayed on the LCD display.
Press the UP ARROW to increase the address; press the DOWN ARROW to decrease it.
Press the ENTER key to save your changes and return to the Advanced menu. Press the FN
key to discard changes and return to the Advanced menu.
When SET BAUD RATE is selected, the baud rate will be displayed on the LCD display.
Three baud rates are available: 2400, 9600 and 38,400 baud. Press the UP ARROW to
increase baud rate; press the DOWN ARROW to decrease it. Press the ENTER key to save
your changes and return to the Advanced Menu. Press the FN key to discard changes and
return to the Advanced Menu.
The Gas Station remote access port is optional. An instrument address of 255 will be displayed if the port is not available.
The I/O board serial port is optional. A baud rate of 1800 will be displayed if the I/O board
does not support serial communication.
The GGA display communicates at 9600 baud. A special display will be required to communicate at one of the optional baud rates.
23
HA0156P09 Rev. A
Modes of Operation
Startup
The GGA initializes all relays to the de-energized position.
The GGA executes a “power-on self-test” (POST) to verify its proper operation. It verifies its
software by checksum testing the contents of its read-only memory (ROM). It tests all of its
power supplies and all of its relays. It checks the cell temperature and waits until it reaches
55.0 C +/- 5.0 C. High temperature cells can be adjusted to operate at any temperature
between 55 C and 70 C.
The POST will take about 20 seconds to complete if no errors are encountered and the cell
is at its normal operating temperature. At the conclusion of the POST, the GGA will flash
NORMAL (H2/AIR), CONFIGURE VALVES. Verify the valve configuration and then press the
ENTER key for normal operation or the FN key for suspended operation.
Startup Problems
The GGA verifies its software by checksum testing the contents of its read-only memory
(ROM). If it finds a problem it will stop the POST process and flash BAD CHECKSUM on the
LCD. The FN key may be pressed to allow the GGA to continue the POST process. However, proper operation cannot be guaranteed if this error is present.
The GGA will annunciate any problems it finds with the power supplies, I/O board or relays.
The presence of one or more of these faults will not stop the POST process. However, they
should be corrected as soon as possible because they indicate a hardware problem.
The GGA tests the 12-bit A/D converter responsible for measuring the cell voltages. If it
cannot communicate with the A/D converter, the display will flash 12BIT ADC FAILED. The
FN key may be pressed to allow the GGA to continue the POST process. However, proper
operation of the A/D converter should be verified.
The GGA examines the cell voltages and compares them to expected values. An improperly
connected cell, a defective cell cable or a problem with the cell itself can result in voltages
outside of the expected range. If the GGA detects any voltages outside of their expected
range, the display will flash CELL PROBLEM. The FN key may be pressed to allow the GGA
to continue the POST process. However, proper operation of the sensor cell must be
verified.
The GGA requires that the cell temperature reach 55.0°C+/- 5.0°C before enabling Normal
operation. High temperature cells can be adjusted to operate at any temperature between 55
C and 70 C. The POST will wait until the cell temperature falls within this range before
proceeding. The test can be bypassed by pressing the ENTER key.
Suspended Operation
When the GGA is in suspended operation it will not monitor the gas concentration or generate any alarms or warnings. The Trouble LED will be illuminated whenever the GGA is in this
mode of operation. The numerical displays will be blank and the 4 to 20 mA output will indicate zero percent gas purity.
HA0156P09 Rev. A
24
Purge Operation — H2 in CO2
When the GGA is in purge hydrogen in carbon dioxide operation it will display the concentration of hydrogen in CO2. It will not generate any alarms or warnings. The GGA will display the
measured purity on the numerical displays. The measured purity is also available through a 4
to 20 mA output. The 4 to 20 mA current output of the GGA corresponds to 0 to 100 percent
gas purity.
Purge Operation – Air in CO2
When the GGA is in “purge air in carbon dioxide” operation it will display the concentration of
air in CO2. It will not generate any alarms or warnings. The GGA will display the measured
purity on the numerical displays. The measured purity is also available through a 4 to 20 mA
output. The 4 to 20 mA current output of the GGA corresponds to 0 to 100 percent gas purity.
Normal Operation
Note: It is important to verify that the lines connecting LE025 to the turbine-end seal drain
enlargement, LE026 to the collector-end seal oil enlargement, and LE028 to the case fan
pressure are filled with hydrogen before placing the system into Normal operation.
When the GGA is in Normal operation it will display the concentration of the hydrogen in air. It
will indicate a warning or alarm condition if it is out of specification. The GGA monitors the
gas purity with a thermal conductivity cell. The GGA will display the measured purity on the
numerical displays. The measured purity is also available through a 4 to 20 mA output. The 4
to 20 mA current output of the GGA corresponds to 70 to 100 percent gas purity.
25
HA0156P09 Rev. A
Maintenance
The Dual Hydrogen Control Panel (DHCP) is designed for reliable, trouble-free operation.
Periodic checks and maintenance are easy. Following the required maintenance checks will
ensure safe trouble free operation of this equipment.
Daily
Check and adjust DHCP analyzer and scavenging flow rates. See Flow Calibration. Check
hydrogen purity.
Weekly
1. Visually inspect the moisture indicators. A blue medium indicates dry hydrogen, while a
pink medium indicates excessive moisture in the hydrogen gas sample that may affect
the stability of the Generator Gas Analyzers. Replace or regenerate the Moisture Indicator
and replace the Gas Purifier if the medium is pink. See Removal of Moisture Indicators
and Gas Purifiers.
2. Blow down purifiers by first removing cap at the base of the isolation valve and then open
the valve itself. It is advisable to have a container available to collect any fluid contained
within the purifier. CAUTION! THE PURIFIERS MAY CONTAIN HYDROGEN GAS;
USE PROPER SAFETY PRECAUTIONS.
Every Six Months
1. Check Analyzer power and calibration voltages.
2. Calibrate Generator Gas Analyzers, as necessary.
3. Run Diagnostics.
When the Generator is Down
During periods when the generator is shut down, it is recommended that either a) power be
maintained to the DHCP; or b) the DHCP be isolated by placing all isolation valves in “off”
position.
HA0156P09 Rev. A
26
Component Replacement Instructions
The hydrogen analyzer sensing units, input/output circuit board, processor circuit boards,
power supplies and shunt boards are located inside the main junction box. To gain access to
the inside of the main junction box for service, remove the 32, 3/4-inch captive bolts. Two
guide studs assist with removal/replacement.
CAUTION! Do not scratch sealing surfaces on the main junction box. The main junction box lid weighs 50 lbs (22.7 kg). Take precautions during removal. Prior to opening the main junction box, remove power from the HCP and ensure the system is free
of hydrogen.
Removing a Gas Analyzer Sensor
To remove a hydrogen analyzer from a flameproof enclosure:
1. Disconnect AC input power.
2. Manually close isolation valves HV-2979, HV-2980, HV-2982 and HV-2981.
3. Remove the cover of the main junction box.
4. Remove 4 screws used to secure processor and I/O boards (see Figure 5).
5. Remove the 12-pin cable connector from the sensor circuit board.
6. Remove inlet and outlet tubing connections from the analyzer with a 7/16-inch wrench.
7. Remove mounting hardware (4 slotted screws).
8. To reinstall sensor cell, reverse above process, then leak check.
Removing a Processor Circuit Board
To remove a processor circuit board from the main junction box:
1. Disconnect AC input power.
2. Close isolation valves HV-2985, HV-2986, HV-2983 and HV-2973A.
3. Remove the main junction box cover.
4. To remove the processor board, disconnect the 6-pin ribbon cable and remove the 4 nuts
(11/32).
5. Install the new processor board in reverse order.
6. Check that pin #1 on the ribbon connector is properly aligned.
Removing the Input/Output (I/O) Circuit Board
1. Disconnect AC input power.
27
HA0156P09 Rev. A
(Removing the I/O Board cont’d)
2. Close Isolation valves HV-2985, HV-2986, HV-2983 and HV-2973A.
3. Remove the main junction box cover.
4. Remove the processor board. Disconnect the 6-pin ribbon cable and 4 nuts (11/32).
5. Remove the 4 slotted screws that hold the board in place.
6. Remove all wiring connections to the terminal blocks on the Input/Output board.
7. Disconnect power supply connections to the Input/Output board.
8. Disconnect the analyzer cell, 12-pin headers.
9. The Input/Output board can now be removed. Install the new input/Output board in
reverse order.
Removing Solenoid Valves Coils
All solenoid valves are connected in the main junction box. Once the inoperable solenoid
valve is located, remove AC power and manually close all isolation valves.
1. Reach under the solenoid and remove the top cap by prying it off.
2. Push the solenoid valve body down and slide the nameplate/retainer off.
3. Open the closest (small, adjacent) junction box to the solenoid valve and locate the 3
solenoid valve wires.
4. Cut and strip the wires.
5. Install the new solenoid valve.
6. Splice the wires together using an insulated butt splice.
7. Replace the (small, adjacent) junction box cover.
8. Restore AC power and manually reopen the isolation valves.
Removing Moisture Indicators
Three moisture indicators and three gas purifiers are located on the front of the panel (Figure
1).
To remove moisture indicators:
1. Disconnect AC input power.
2. Manually close all isolation valves.
3. Unscrew moisture indicator by hand.
4. Replace moisture indicator by screwing in the replacement by hand.
HA0156P09 Rev. A
28
(Removing Moisture Indicators cont’d)
5. Open isolation valves HV-2971, HV-2972, HV-2979, HV-2980, HV-2973, HV-2974, HV2981, HV-2982 and HV-2978.
6. Perform leak check.
7. Reconnect AC input power.
Removing Gas Purifiers
1. Disconnect AC input power.
2. Manually close all isolation valves.
3. Release pressure within purifier housing by opening drain at HV-2971A, HV-2972A or HV2973A, as appropriate.
4. Remove 8 bolts (1/2” hex) at bottom flange of purifier housing.
5. Remove purifier cartridge and two associated gaskets.
6. Replace cartridge and gaskets.
7. Resecure bolts (to 120” lbs torque).
8. Close drain.
9. Open isolation valves HV-2971, HV-2972, HV-2979, HV-2980, HV-2973, HV-2974, HV2981, HV-2982 and HV-2978.
10. Perform leak check.
11. Reconnect AC input power.
Removing Flow Meters
1. Disconnect AC input power.
2. Manually close all isolation valves.
3. Remove tubing fittings and locking nuts from the back of the flowmeter.
4. Withdraw flowmeter from the front side of the DHCP.
5. To install replacement, reverse above process.
6. Perform leak check.
7. Reconnect AC input power.
29
HA0156P09 Rev. A
HA0156P09 Rev. A
30
Figures
The figures that follow depict the DHCP and its components. All references in this document
refer to the following figures.
Please note that figures 9-23 depict portions of the DHCP. These figures are provided for
easy reference in configuring isolation valves and switches. Please note that isolation valve
handles and actual switches are not shown. Instead, “on,” “off” and arrow graphics are
provided. Contact Environment One with questions relating to any of the figures relating to
this manual.
31
HA0156P09 Rev. A
HA0156P09 Rev. A
32
Figure 1 - DHCP Outline
33
Figure 2 - Piping Schematic
35
Figure 3 - User Interface Connections
37
Figure 4 - Display
39
Figure 5 - Internal Components
41
Figure 6 - DHCP Display Descriptions
Figure6a - Display Indicators
Indicator
Ref. 1
Status
AC Power
Lit when the display is powered and functioning properly
Normal
Lit when the GGA is measuring the concentration of
hydrogen in air
Alarm
Lit when the GGA is measuring hydrogen in air and the
concentration is below the alarm level
1
Warning
Lit when the GGA is in measuring hydrogen in air and the
concentration is below the warning level
2
Trouble
Lit when the GGA detects an abnormal condition
3, 4, 5
Calibrate H2
Lit when the GGA is calibrating against a 100% hydrogen
standard
Calibrate CO2
Lit when the GGA is calibrating against a 100% carbon
dioxide standard
Calibrate N2
Lit when the GGA is calibrating against a 100% nitrogen
standard
Purge H2 in
CO 2
Lit when the GGA is measuring the concentration of
hydrogen in carbon dioxide
Purge Air in CO2
Lit when the GGA is measuring the concentration of air in
CO 2
Gas Purity
Three-digit gas purity indicator (0 to 99.9%)
LCD Display
Displays the current menu selection when the menu is
active
Figure 6b - Display Keys
Key
Function
Reset
Clear the Alarm and Warning conditions in Normal mode
Fn
Activate the menu or cancel a selection
Enter
Select a menu item
UP Arrow
Used for menu navigation and with some menu options to
increase the value of a constant
DOWN Arrow
Used for menu navigation and with some menu options to
decrease the value of a constant
43
HA0156P09 Rev. A
Figure 7 - DHCP Status
Condition
2
3
Typical Cause
Indicators Affected
1 Alarm
The GGA is measuring hydrogen in air and the
concentration is below the alarm level
Alarm LED + Alarm
Relay
2 Warning
The GGA is measuring hydrogen in air and the
concentration is below the warning level
Warning LED +
Warning Relay
3 Tcell ERROR
The sensor cell is not at a temperature of 55 ±5 degrees Trouble LED +
centigrade
Trouble Relay
4 Power Supply
Problem2
One or more power supplies are not within tolerance
Trouble LED +
Trouble Relay
5 I/O Error3
The GGA is detecting a communication error while
trying to talk to the I/O board or the display. One or
more relays are defective.
Trouble LED +
Trouble Relay
6 Relay
Problem3
One or more relays are defective.
Trouble LED +
Trouble Relay
Run power test and examine power log to identify power supply problems.
Examine error log to identify which error is present.
HA0156P09 Rev. A
44
Figure 8 - DHCP Customer Contacts
Contact
4
Ref. 4
Status
Alarm
General Purpose
Energized when the GGA is measuring hydrogen in air and 1
the concentration is below the alarm level
Warning
General Purpose
Energized when the GGA is measuring hydrogen in air and 2
the concentration is below the warning level
Trouble
General Purpose
De-energized when the GGA detects an abnormal
condition
3, 4, 5
See Figure 3
45
HA0156P09 Rev. A
Figure 9 - Valve/Switch Config. Normal %H2 in Air
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2987
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
CARBON
DIOXIDE
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
OFF
HV-2986
HYDROGEN
PURGE
OFF
HV-2984
CASE
OFF
OFF
HV-2978
HV-2983
CASE - CAL / PURGE
Figure 10 - Valve/Switch Config. Purge % H2 in CO2
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2987
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
HA0156P09 Rev A
COLLECTOR
END
HIGH FLOW
OFF
HV-2985
CASE - CAL / PURGE
46
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
PURGE
CASE
OFF
HV-2983
OFF
HV-2978
Figure 11 - Valve/Switch Config. Purge % Air in CO2
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
CONFIRMATION
TURBINE END
OFF
CONFIRMATION
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2974
HV-2987
HV-2971
HV-2973
CALIBRATION GASES
CARBON
DIOXIDE
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
OFF
HV-2986
HYDROGEN
OFF
OFF
HV-2984
CASE
PURGE
HV-2983
OFF
HV-2978
CASE - CAL / PURGE
Figure 12 - Valve/Switch Config. Case
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
HV-2987
OFF
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
47
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
CASE
PURGE
OFF
HV-2983
OFF
HV-2978
CASE - CAL / PURGE
HA0156P09 Rev A
Figure 13 - Valve/Switch Config. Confirmation Mode, Turbine End
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2974
HV-2987
HV-2971
HV-2973
CALIBRATION GASES
CARBON
DIOXIDE
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2986
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
OFF
HYDROGEN
PURGE
OFF
HV-2984
CASE
OFF
OFF
HV-2983
HV-2978
CASE - CAL / PURGE
Figure 14 - Valve/Switch Config. Confirmation Mode, Collector End
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2987
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
HA0156P09 Rev A
COLLECTOR
END
HIGH FLOW
OFF
HV-2985
CASE - CAL / PURGE
48
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
PURGE
CASE
OFF
HV-2983
OFF
HV-2978
Figure 15 - Valve/Switch Config. Calibrate N2 (Both Analyzers)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2987
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
CARBON
DIOXIDE
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
HV-2986
HYDROGEN
PURGE
OFF
HV-2984
CASE
OFF
OFF
HV-2978
HV-2983
CASE - CAL / PURGE
Figure 16 - Valve/Switch Config. Calibrate C02 (Both Analyzers)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
HV-2987
OFF
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
49
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
PURGE
CASE
OFF
HV-2983
OFF
HV-2978
CASE - CAL / PURGE
HA0156P09 Rev A
Figure 17 - Valve/Switch Config. Calibrate H2 (Both Analyzers)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
HV-2987
OFF
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
CARBON
DIOXIDE
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
OFF
HV-2986
HYDROGEN
OFF
OFF
HV-2984
CASE
PURGE
HV-2983
OFF
HV-2978
CASE - CAL / PURGE
Figure 18 - Valve/Switch Config. Calibrate N2 (Turbine End)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
HV-2987
OFF
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
HA0156P09 Rev A
COLLECTOR
END
HIGH FLOW
CASE - CAL / PURGE
50
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
PURGE
CASE
OFF
HV-2983
OFF
HV-2978
Figure 19 - Valve/Switch Config. Calibrate N2 (Collector End)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2974
HV-2987
HV-2971
HV-2973
CALIBRATION GASES
CARBON
DIOXIDE
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
OFF
HV-2986
HYDROGEN
PURGE
CASE
HV-2983
HV-2984
OFF
OFF
OFF
HV-2978
CASE - CAL / PURGE
Figure 20 - Valve/Switch Config. Calibrate C02 (Turbine End)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
HV-2987
OFF
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
51
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
CASE
PURGE
OFF
HV-2983
OFF
HV-2978
CASE - CAL / PURGE
HA0156P09 Rev A
Figure 21 - Valve/Switch Config. Calibrate C02 (Collector End)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
HV-2987
OFF
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
CARBON
DIOXIDE
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
HV-2986
HYDROGEN
PURGE
OFF
CASE
OFF
HV-2983
HV-2984
OFF
HV-2978
CASE - CAL / PURGE
Figure 22 - Valve/Switch Config. Calibrate H2 (Turbine End)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
OFF
HV-2972
CONFIRMATION
COLLECTOR END
OFF
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
HV-2987
OFF
HV-2974
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
HA0156P09 Rev A
COLLECTOR
END
HIGH FLOW
52
CASE - CAL / PURGE
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
PURGE
CASE
OFF
HV-2983
OFF
HV-2978
Figure 23 - Valve/Switch Config. Calibrate H2 (Collector End)
TURBINE END
LINE
TURBINE
END
LOW FLOW
TURBINE
END
HIGH FLOW
HO-2972
HO-2971
OFF
CONFIRMATION
TURBINE END
CONFIRMATION
OFF
HV-2972
CONFIRMATION
COLLECTOR END
COLLECTOR
END
HIGH FLOW
COLLECTOR
END
LOW FLOW
HO-2973
HO-2974
COLLECTOR END
LINE
OFF
OFF
OFF
HV-2974
HV-2987
HV-2971
HV-2973
CALIBRATION GASES
NITROGEN
FAN
DIFFERENTIAL
PRESSURE
GAGE
PDI-292
OFF
HV-2985
TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE
53
CARBON
DIOXIDE
OFF
HV-2986
HYDROGEN
OFF
HV-2984
CASE
PURGE
OFF
HV-2983
OFF
HV-2978
CASE - CAL / PURGE
HA0156P09 Rev A
54
(B)
HD0641GXX Rev HA0040P01
HA0040P02
HD0403G01
HA0058P08
HA0010P01
HA0011P01
HA0139P02
HA0013P01
HA0014P01
HA0016P01
HB0026G01
HD0417G04
HB0018P01
HB0018P02
HA0065P01
HC0021G01
HA0027P01
HA0385G03
HD0497G02
HA0106P01 *
HA0017P01 **
HA0017P02 **
HA0041P09 ****
HA0058P12 ***
Part Name / Description
(C)
FLOW METER W/VALVE
FLOW METER SCALE
DISPLAY BOARD ASM
DIFFERENTIAL PRESSURE TRANSMITTER
METERING VALVE 1/4M NPT PORTS
ISOLATION BALL VALVE FEMALE
CARTRIDGE
IND MOISTURE IMPURITY
VALVE SOLENOID 2-WAY
VALVE SOLENOID 3-WAY
DISPLAY PANEL
I/O BOARD
HOUSING, FLAME ARRESTOR - 2.38 LG
RETAINER, FLAME ARRESTOR - .70 LG
FILTER ELEMENT, FLAME ARRESTOR
ANALYZER CELL ASM
PWR SUPPLY +12VDC
CONTROLLER BOARD
SAFETY SHUNT
TRANSFORMER
HEATER - 120 V, 220 WATT EXPLOSION
PROOF HEATER
HEATER - 220 V, 220 WATT EXPLOSION
PROOF HEATER
DIFFERENTIAL PRESSURE GAUGE
DIFFERENTIAL PRESSURE TRANSMITTER
* USED ON 220 VOLT VERSION
** USED ON NEMA 3R VERSION
*** USED ON CSA VERSION
**** USED ON G09 VERSION
TAG NUMBER
(O)
(D)
DHCP, FINAL ASM
DHCP, FINAL ASM
DHCP, FINAL ASM
DHCP, FINAL ASM
DHCP, FINAL ASM
DHCP, FINAL ASM
PURIFIER ASM
PURIFIER ASM
SOLENOID ASM
SOLENOID ASM
DHCP, FINAL ASM
GUB ELEC ASM
JUNCTION BOX ASM
JUNCTION BOX ASM
JUNCTION BOX ASM
GUB ELEC ASM
GUB ELEC ASM
GUB ELEC ASM
GUB ELEC ASM
DHCP, FINAL ASM
PDI-292
Fl-2971, Fl-2972
Fl-2973
PDT-292
FY-2971, FY-2973
FY-2972, FY-2974, FY-2981
QT-290A, QT-290B
HEATER ASM
HEATER ASM
DHCP, FINAL ASM
DHCP, FINAL ASM
PDI-292
PDT-292
Quantity
Quantity used Recommended as
on Assembly
Spares
(E)
(P)
1
1
2
1
1
1
4
3
3
2
3
1
2
4
4
12
2
2
2
2
1
OEM
(F)
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
MIDWEST INSTRUMENTS
MATHESON
EONE
YOKOGAWA
PARKER
PARKER
MATHESON
MATHESON
AUTOMATIC SWITCH
AUTOMATIC SWITCH
EONE
EONE
EONE
EONE
LEEDS & NORTHRUP
EONE
TRI-MAG INC.
EONE
EONE
SIGNAL
1
1 CHROMALOX
1
1
1
1 CHROMALOX
1 MIDWEST
1 YOKOGAWA
Componenet Supplier (OEM)
Part Number
(H)
Figure 24 - Parts List
HA0156P09 Rev. A
Part Number
Part Location
Description on
Assembly
A Precision Castparts Company
Environment One Corporation
2773 Balltown Road
Niskayuna, New York USA 12309–1090
Tel: (01) 518.346.6161
Fax: 518.346.6188
www.eone.com