DIVISION 22
PLUMBING
SECTION 22 63 01
MEDICAL GAS SYSTEM SPECIALTIES
PART 1
1.01
1.02
1.03
GENERAL
DESCRIPTION
A.
Provide all zone valves, alarm panels, outlets, and appurtenances required for the following
medical gas systems:
1. Medical Air
2. Medical Oxygen
3. Medical Vacuum
4. Medical Waste Anesthesia Gas Disposal (WAGD)
B.
The Plumbing Contractor will be responsible for piping each outlet. See Section 22 61 13,
"Medical Gas Piping Systems."
C.
All medical gas outlets shall match or be compatible to Chemetron, Amico, Beacon
Medaes, or Squire-Cogswell.
D.
This Contractor shall also provide main alarm panel to indicate a remote signal (audio and
visual) of gas sensors, from the equipment. Confirm location of panel with Architect and
Owner. The Electrical Contractor provides wiring from new main panel to pressure switch
on new medical vacuum pump pressure switches, new medical air compressor and gas
evacuation pump.
E.
Oxygen system components, including, but not limited to, valves, valve seats, lubricants,
fittings, gaskets, and interconnecting equipment including hoses, shall have adequate
compatibility with oxygen under the conditions of temperature and pressure to which the
components may be exposed in the containment and use of oxygen. Easily ignitable
materials shall be avoided unless they are parts of equipment or systems that are approved,
listed, or provided suitable by tests or by past experience.
WORK NOT INCLUDED
A.
Medical gas regulators and vacuum bottles that attach to the medical gas outlets shall be
furnished by the Owner.
B.
Medical gas storage cylinders shall be furnished by the Owner.
QUALITY ASSURANCE
A.
1.04
Standards: National Fire Protection Association (NFPA 99) and Compressed Gas
Association (CGA).
MANUFACTURERS
A.
13-HC1-033
Equipment based on Chemetron. Acceptable equipment by Amico or Beacon Medaes.
22 63 01-1
SECTION 22 63 01
MEDICAL GAS SYSTEM SPECIALTIES
PART 2
2.01
2.02
PRODUCTS
WALL TYPE OUTLETS
A.
Medical gas outlets shall be equal to Beacon Medaes, consisting of a die cast aluminum
back plate with mounting flanges on all four sides, a 1/2 inch raised plaster strike, and a
non-removable positive pin keying arrangement for each specific gas service.
Identification of the specific gas service shall be permanently embossed or cast into the
back plate. Mounted to the back plate shall be the secondary check assembly with a 7 inch
length of 3/8 inch OD Type K copper tubing. The tubing shall have a label affixed which
identifies the specific gas service by name and color and a plastic dust cap on the end of the
tubing extension. The design shall permit 360 degrees rotation of the inlet tubing for ease
of connection to gas supply from any direction. The secondary check valve shall be
completely serviceable from the front including removal of all seals and check components.
B.
The design of the secondary check, including vacuum outlets, shall be such that both the
primary and secondary check valves operate simultaneously. When the outlet is not in use,
both primary and secondary check valves shall seal the outlet and prevent gas flow. The
design of the primary check shall be such that absolutely no gas flow can take place until
the keying devices are engaged.
C.
The quick-connect finishing assembly shall be designed with integral color-coded keying
disc to prevent connection of patient treatment devices and gas service hose adapters to the
existing gas service.
D.
The finishing assembly shall consist of a die cast chrome-plated coverplate, a machined
brass housing for the primary check valve, the check valve, and positive pin keying devices
with a minimum surface area of 2.5 square inches of appropriate color per CGA C-9
Standard shall be incorporated into the outlet. A permanently affixed name plate
identifying the gas service on the finished surface of the outlet shall contain letters not less
than 3/16 inch high and shall incorporate color coding.
E.
Vacuum Slides
1. Die-cast chrome-plated coverplate with an extruded aluminum slide assembly. Provide
at least one slide assembly next to vacuum outlet. Confirm exact number and location
of slides with the Architect.
SHUTOFF VALVES
A.
Bronze valve body, bolted union type ball valve with threaded ends, solder joints, or tubing
extensions, TFE stem seals, dual seal blowout-proof stem, leak-free Buna-N seats and
seals, chrome-plated bronze ball which seals in both directions, end fittings to match
adjacent piping and designed for a working pressure of 300 psig.
B.
Valve shall be designed that only a quarter turn of the lever-type handle is necessary
between the open and closed positions.
C.
Gas service label on valve shall be furnished for each service.
D.
All construction and isolation valves in medical gas piping shall also include identification
sign indicating what service the valve is serving. Refer to detail on Drawings.
22 63 01-2
13-HC1-033
SECTION 22 63 01
MEDICAL GAS SYSTEM SPECIALTIES
E.
2.03
2.04
All valves above ceiling shall also include identification sign. Refer to detail on Drawing.
RECESSED VALVE BOXES
A.
Recessed valves boxes shall be equal to Beacon Medaes, which shall consist of extruded
aluminum finishing frame with pull-out window, roughing-in assembly with extruded
aluminum backbox containing one or more chrome-plated ball type shutoff valves, and
tubing extensions with color-coded gas service labels affixed.
B.
The valve box assemblies shall be provided with line-pressure monitoring gauges mounted
downstream from the shutoff valves inside the valve box.
C.
The finishing frame shall be extruded, welded, one-piece, etched and anodized aluminum,
and shall attach to the roughing-in assembly with concealed mounting screws, which allow
plaster adjustment of up to one inch. Contained within the finishing frame shall be a clear
removable vinyl window with pull ring attached in the center; when pulled, it will remove
the window for access to the valve(s). The window shall have the ability to be replaced in
position without the use of tools, only after the valve handle has been returned to the open
position. The window shall contain a caution label reading: "CAUTION-CLOSE ONLY
IN EMERGENCY" and "PULL RING FOR ACCESS." The window shall be marked to
prevent unauthorized persons from tampering with valve.
D.
The roughing-in assembly shall be constructed of an extruded aluminum backbox with
backplate, and have 1/2 inch deep plaster flange on all four sides for securing assembly to
structural wall, and a pull-out plaster guard to prevent debris from entering the backbox
during installation. A color-coded gas service label with mounting bracket, which can be
marked to indicate rooms or area controlled, shall be supplied for each valve. The labels
shall be mounted directly on the vinyl window for ease of visibility.
E.
Valves and tubing extensions shall be chrome-plated, except for approximately 5 inches of
bare surface for brazing, assembled, pressure tested, cleaned, capped, and rigidly mounted
to the backbox for ease of installation.
F.
Coordinate locations with the Architect and the General Trades Contractor if recessed valve
boxes exceed dimensions to fit within 4 inch deep wall.
PRESSURE SWITCHES
A.
13-HC1-033
One or more of the following switches shall be required to signal the Main Alarm Panel:
1. The high-low line pressure switch to be a dual-circuit type, with two single-pole,
double throw, UL listed snap-action switches. Pressure switch shall be tested at 180
psig with an adjustable range of 3.8 to 100 psig, preset at 40 and 60 psig (plus or minus
2 psig).
2. For medical vacuum or medical WAGD service, switches shall signal "Line Vacuum
Above Normal," "Line Vacuum Below Normal," adjustable range.
3. Switches shall also sense low oxygen level and indicate when the RESERVE oxygen
supply is in use.
22 63 01-3
SECTION 22 63 01
MEDICAL GAS SYSTEM SPECIALTIES
2.05
2.06
RECESSED NITROGEN PRESSURE CONTROL CABINET
A.
Recessed cabinet including a line-pressure control regulator, two line pressure gauges for
monitoring supply and outlet lines, keyed nitrogen service outlet, and supply valve, all
assembled and rigidly mounted in a steel roughing-in assembly designed for recessed
installation. The cabinet shall have a stainless steel coverplate mounting the supply and
outlet pressure gauges, pressure control knob, supply valve levers and service outlet.
B.
The recessed roughing-in assembly shall consist of a prime-painted steel fabricated
backbox with mounting flanges on all four sides, having provisions for securely anchoring
the backbox to the wall construction (physical dimensions as shown on the Drawings.) The
5 3/4 inch lengths of 3/8 inch I.D. Type "K" soft copper tubing shall be provided for
connection to gas service supply line. The roughing-in assembly shall also be equipped
with a cross-over U-tube to facilitate testing of the nitrogen system prior to the manifold
installation. The roughing-in assembly shall be equipped with a plaster shield to prevent
dust or other foreign matter from contaminating internal parts prior to final assembly.
C.
The manifold assembly shall consist of a line-pressure control regulator of the selfrelieving diaphragm type, with high-flow precision adjustment and working pressure in
excess of 200 psig. Two line pressure gauges shall monitor the gas supply line and the
outlet line pressure; both gauges shall be calibrated from 0 to 300 psig in increments of 10
psig. The nitrogen service outlet shall use the Diameter Index Safety System (DISS) to
prevent interchange-ability of equipment (CGA 1120). The DISS outlet shall have a selfsealing dust plug and primary check unit designed to seal when equipment is removed, and
shall have a working pressure of 200 psig maximum. The supply valve shall have a bronze
bodied, double seal, full flow, ball valve designed for working pressures in excess of 200
psig, with chrome-plated brass ball which seals in both directions. The valve shall require
only a quarter turn of the knob from OPEN to CLOSED positions. All the above shall be
manifolded and mounted to a steel support bracket which shall be factory assembled and
tested, ready for installation in the roughing-in assembly.
AREA MONITOR AND ALARM PANEL
A.
Modular area alarm panel shall include "normal" light, audio silence switch, test switch,
round dial gauge, backlighted "abnormal" indicator, 24 volt control transformer, pressure
switches and factory-wired controls. A green normal light will glow for all systems
"normal." If any abnormal condition signal is received, the green light will go out and both
an audible warning device will sound and the "ABNORMAL CONDITION" red light will
come on. A switch shall be supplied to silence the warning device. However, the abnormal
light shall remain on until the condition has been corrected. If two or more abnormal
conditions occur, their condition will be indicated on the alarm panel until corrected. Only
after all conditions have been corrected will the "NORMAL" light glow again. A test
switch shall be supplied to test all lamps and the audible warning device.
B.
Refer to the Drawings for location and configuration of each area monitor panel.
C.
Panels shall display one or a combination of the following:
1. AIR LINE PRESSURE ABNORMAL
2. VACUUM LINE PRESSURE ABNORMAL
3. GAS EVACUATION LINE PRESSURE ABNORMAL
4. OXYGEN LINE PRESSURE ABNORMAL
22 63 01-4
13-HC1-033
SECTION 22 63 01
MEDICAL GAS SYSTEM SPECIALTIES
2.07
2.08
MAIN ALARM PANEL
A.
Each medical gas main alarm panel shall be a closed-circuit self-monitoring type. Alarm
shall be used to monitor medical gas systems as indicated below. A green "NORMAL"
light will glow when all systems are normal. If any abnormal condition signal is received
from remotely monitored switches, the green light will go out and both an audible warning
device will sound and the "ABNORMAL" condition red light will come on. A switch shall
be supplied to silence the warning device. However, the abnormal light shall remain on
until the condition has been corrected. If two or more abnormal conditions occur, their
condition will be indicated on the alarm panel until corrected. Only after all conditions
have been corrected will the NORMAL light glow again. A test switch shall be supplied to
test all light bulbs and the audible warning device.
B.
Main alarm panel to include 24 volt transformer and terminal block for wiring to remote
pressure switches.
C.
The alarm system shall be of such design that one, two or more monitors may be connected
to a single pressure switch and all will work as described above. Alarm system shall be
designed in accordance with NFPA 99 requirements.
D.
Alarm shall monitor the following abnormal conditions:
1. OXYGEN RESERVE SUPPLY IN USE
2. OXYGEN LINE PRESSURE HIGH
3. OXYGEN LINE PRESSURE LOW
4. AIR LINE PRESSURE HIGH
5. AIR LINE PRESSURE LOW
6. VACUUM LINE BELOW NORMAL
7. DEW POINT LEVEL HIGH
8. HIGH MEDICAL AIR TEMPERATURE DISCHARGE (FROM MEDICAL AIR
COMPRESSOR SYSTEM)
MEDICAL GAS MANIFOLD
A.
Furnish manifold for medical oxygen.
B.
UL listed Beacon Medaes manifold, including a 16 gauge steel, weather resistant cabinet,
with locked doors, heater to prevent freezing, alarm system transformer, and the necessary
header connections and pigtails for six (6) 3 x 2 cylinders. The manifold system shall be
expandable to include more gas cylinders in the future. The controls shall be arranged to
have half the cylinders in service and half the cylinders in reserve. Cylinders shall be
furnished by the Owner.
C.
Manifold controls include two bank regulators, line regulator with valved bypass, bleeder
valve and pressure switches, automatic shutoff valve with visual indicator, pressure gauges,
relief valves, high pressure shutoff valve, ball-type high pressure check valve at each
cylinder and 24 volt red and green pilot lights to indicate reserve supply changeover.
D.
Automatic switchover from service to reserve bank shall be accomplished without
fluctuation in the line pressure.
E.
Three front-mounted pressure gauges shall indicate bank and line pressures.
13-HC1-033
22 63 01-5
SECTION 22 63 01
MEDICAL GAS SYSTEM SPECIALTIES
F.
PART 3
3.01
3.02
A green indicator light in the cabinet shall indicate when service bank is in use and a red
light shall indicate when the reserve bank is in use. Terminal block connections shall be
provided for remote alarm.
EXECUTION
INSTALLATION
A.
All piping outlets and equipment shall be cleaned for service and tested prior to shipping.
B.
Install area alarm and main panels as shown or indicated on the Drawings.
C.
All medical vacuum outlets shall have a vacuum bottle bracket slide included on the
coverplate for receiving a standard 1-3/4" x 4-1/4" x 3/16" thick bottle bracket for vacuum
trap. Refer to the Drawings for different outlet arrangements.
D.
Provide a transparent plaster guard covering the related plaster strike area to permit viewing
the condition of the interior and prevent the entry of foreign material and debris during
installation and finishing of the walls.
E.
Coordinate number and location of all medical gas outlets and vacuum slides with the
Architect and the Owner.
F.
Coordinate location of all recessed valve boxes, medical gas manifold system, area monitor
alarm panels and main alarm panel with the Architect and the Owner.
G.
Install all remote pressure sensor modules above area monitor and alarm panels and just
below ceiling.
WIRING
A.
Provide all alarm and interlock wiring from pressure switches, dew point monitor, carbon
monoxide monitor, etc. to remote alarm panel in security room and main alarm panel.
B.
120 volt emergency power to each area alarm panel, dew point monitor, carbon monoxide
monitor and alarm panel is a part of the Electrical Work.
END OF SECTION
22 63 01-6
13-HC1-033