35.65.1
Series 35-65
Microprocessor Based Hot
Surface Ignition System
FEATURES
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24 VAC Microprocessor Based HSI Control
System Diagnostic LED
Automatic reset 1 hour after lockout (optional)
Multiple tries
Custom prepurge and interpurge timings
Remote and Local Sensing
Flame sense test pins
Operates with 24 VAC, 120 VAC and 240 VAC
Hot surface ignitors
• Software conforms to UL 1998 requirements
• Design certified to ANSI Z21.20 and CAN/
CSA C22.2 No. 199-M89
• FM approval on select models
DESCRIPTION
The Series 35-65 is a 24 VAC Microprocessor Based
Hot Surface Ignition Control designed for use in all
types of heating applications such as gas furnaces,
boilers, water heaters, commercial cooking and other
similar appliances. The control utilizes a microprocessor to continually and safely monitor, analyze and control the proper operation of the gas burner. Value
added features such as LED diagnostics, automatic
one hour reset, and flame current test pins highlight
the controls benefits. The control senses flame either
locally or remote depending on the application wiring.
OPERATION
HEAT MODE
•When a call for heat is received from the thermostat
supplying 24 volts to the W input, the control will perform a self check routine, flash the diagnostic LED
for up to four seconds and begins the safety timing
sequence. Following an optional pre-purge period
the hot surface ignitor is activated for a heat-up period followed by energization of the gas valve for the
trial for ignition period.
•When flame is detected during the trial for ignition,
the ignitor is de-activated and the gas valve remains
energized. The thermostat and main burner flame
are constantly monitored to assure the system continues to operate properly. When the thermostat is
satisfied and the demand for heat ends, the main
valve is de-energized immediately.
FAILURE TO LIGHT - LOCKOUT
• Single Try Model
Should the main burner fail to light, or flame is not
detected during the trial for ignition period, the control
will go into lockout and the valve will be turned off
immediately.
• With one hour reset option, if the thermostat is still calling for heat after one hour, the control will automatically
reset and attempt to ignite the burner again.
• Multi-try Model
Should the main burner fail to light, or flame is not
detected during the first trial for ignition period, the gas
valve is de-energized and the control goes through an
optional interpurge delay before another ignition
attempt. The control will attempt two additional ignition
trials before going into lockout and the valve relay will
be de-energized immediately.
• Recovery from lockout requires a manual reset by
either resetting the thermostat or removing 24 volts for
a period of 5 seconds.
• With one hour reset option, if the thermostat is still calling for heat after one hour, the control will automatically
reset and attempt to ignite the burner again.
FLAME FAILURE - RE-IGNITION
• If the established flame signal is lost while the burner
is operating, the control will respond within 0.8 seconds. The gas valve is de-energized and the control
starts a new ignition sequence in an attempt to
relight the burner. If the burner does not light, the
control will de-energize the gas valve. Multi-try models will make two more attempts to relight the burner.
If the burner does not relight, the control will go into
lockout as noted above in “Failure to light”. If flame is
re-established, normal operation resumes.
Fault Conditions
The LED flashes ON for 1/4 second, then OFF for 1/4
second during a fault condition. The pause between
fault codes is 3 seconds.
Mounting and Wiring
The control is not position sensitive and can be mounted
vertically or horizontally. The case may be mounted on
any surface with #6 sheet metal screws.
All wiring must be done in accordance with both local
and national electrical code. WARNING: The control
uses voltages of shock hazard potential. Wiring and initial operation must be done by a qualified service technician.
The control must be secured in an area that will experience a minimum of vibration and remain below the
maximum operating temperature of 160°F.
All connections should be made with UL approved
105°C rated 18 gauge, stranded, .054 thick insulated
wire. Refer to wiring diagram when connecting the
control to other components in the system.
SILICON CARBIDE IGNITOR
Proper location of the hot surface ignitor is important
to achieve optimum system performance for both
ignition and flame sensing. See figure 3.
NOTE: The temperature of the ceramic holder should
not exceed the manufacturer’s specifications.
CAUTION: Label all wires prior to disconnection when
servicing controls. Wiring errors can cause improper
and dangerous operation. A functional checkout of a
replacement control is recommended.
* Voltage depends on selected model.
Specifications
Input Power
Control: 18-30 VAC 50/60 Hz
(Class 2 Transformer)
Line: 240/120/24 VAC
(L1, L2 contacts only)
(Voltage depends on selected
model)
Input Current Drain
300 mA @ 24 VAC,
with gas valve relay energized
(control only)
Gas Valve Rating
2.0A @ 24 VAC
Operating Temperature
-40°F to +160°F
-40°C to + 71°C
Flame Sensitivity
0.7µA minimum
Flame Failure
Response Time
0.8 seconds maximum
Types of Gases
Natural, LP, or manufactured
Ignitor
24VAC, 120VAC or 240VAC
mini-ignitors and silicon
carbide ignitors depending
upon selected model
Enclosure
Gray (Noryl N-190)
fire retardent plastic
Moisture Resistance
Conformal coated to operate
non condensing to 95% R.H.
Care must be taken to protect
module from direct exposure to
water
Tries for ignition
One or three try versions
available
Trial for Ignition Periods
4.0, 7.0, 10.0, or 15.0 seconds
available
Prepurge & Interpurge
None, 15, or 30 seconds depending on model. Without prepurge
there is a 3.5 second delay before
the ignition sequence
WARNING: Operation outside specifications could cause
failure of the Fenwal product and other equipment resulting
in property damage, personal injury or even death from fire,
explosion, and/or toxic gases.
FENWAL ACCESSORY ITEMS
Part Number
Description
22-100000-691 Flame Sensor
05-128981-024 5 position Mate-n-lok wire harness
05-128844-024 2 position Mate-n-lok wire harness
05-080224-002 24VAC Gas Ignition FIELD TESTER
Series 35-65
SERVICE CHECKS
Flame current is the current which passes through the
flame from the sensor to ground. The minimum flame
current necessary to keep the system from lockout is
0.7 microamps. To measure flame current, connect an
analog DC microammeter to the FC1/FC2 terminals per
figure. Meter should read 0.7 µA or higher. If meter
reads below “0” on scale, meter leads are reversed.
Disconnect power and reconnect meter leads for proper
polarity.
Catalog Number Breakdown
Series 35-65 X X X-X X X
TRIAL FOR IGNITION
1= 4 SECONDS
3= 7 SECONDS
5= 10 SECONDS
7= 15 SECONDS
INTER-PURGE
0= NONE
1= 15 SECONDS
2= 30 SECONDS
SPECIAL OPTIONS
· NO COVER
· NO DIAGNOSTICS
· RECYCLE AFTER LOSS
OF FLAME
· REMOTE LED
CONNECTOR
PRE-PURGE
0= NONE
1= 15 SECONDS
2= 30 SECONDS
TRIES FOR IGNITION
0= SINGLE TRY - NO AUTOMATIC RESET
1= SINGLE TRY - WITH 1 HOUR RESET
5= THREE TRIES - NO AUTOMATIC RESET
6= THREE TRIES - WITH 1 HOUR RESET
*SPECIAL FEATURE SERIES
WILL USE Series 35-653XX AND
Series 35-659XX TO IDENTIFY
OEM MODEL AND DO NOT
FOLLOW CATALOG NUMBER
BREAKDOWN SHOWN HERE
(CONSULT FACTORY)
TERMINATION
0= ALL Q.C. TERMINALS WITHOUT FULL TIME POWER
1= MATE-N-LOC (5 POS.) W/Q.C. TERMINALS WITHOUT FULL TIME POWER
2= MATE-N-LOC (2 POS.) W/Q.C. TERMINALS WITHOUT FULL TIME POWER
5= ALL Q.C. TERMINALS WITH FULL TIME POWER (R)
6= MATE-N-LOC (5 POS.) W/Q.C. TERMINALS WITH FULL TIME POWER (R)
PRODUCT DESIGNATION
0= 120 VAC OR 240 VAC MINI-IGNITOR (6 SECOND HEAT-UP)
2**= CE APPROVED 24VAC MINI-IGNITOR (4 SECOND HEAT-UP)
3**= CE APPROVED SPECIAL FEATURES*
5= 120/240 VAC HSI 20 SECOND HEAT-UP (SILICON CARBIDE)
6= 120/240 VAC HSI 40 SECOND HEAT-UP (SILICON CARBIDE)
7= 24 VAC MINI-IGNITOR (4 SECOND HEAT-UP)
8= AFTERMARKET KIT
9= SPECIAL FEATURES* (STANDARD CATALOG NUMBERS DO NOT APPLY)
** REFER TO Series 35-65 EURO
PRODUCT LITERATURE #
35.65E.1 FOR CATALOG
NUMBER BREAKDOWN
OUTLINE DIMENSIONS
ALL QC TERMINALS – Series 35-65X5X-XXX MODELS
MATE-N-LOC (2 POSITION) – Series 35-65X2X-XXX MODELS
Note: All Q.C. Terminals are 1/4” except MV1 and GND are 3/16” Q.C.
KIDDE-FENWAL, INC.
400 MAIN STREET, ASHLAND, MA 01721
TEL: (508) 881-2000 FAX: (508) 881-6729
www.fenwalcontrols.com
35.65.1
7/00
©2000 Kidde-Fenwal, Inc.
Printed in U.S.A.
CP
MATE-N-LOC (5 POSITION) – 2465HX1X-XXX MODELS
– Series 35-65X6X-XXX MODELS
The literature is provided for informational purposes only. KIDDE-FENWAL, INC.
assumes no responsibility for the products suitability for a particular application.
The product must be properly applied to perform as described herein.
If you need more information on this product, or if you have a question, contact
KIDDE-FENWAL, INC., Ashland, MA 01721 (508) 881-2000.