Part # P128 Rev 5 (05/29/09)
Page 6
INSTALLATION Continued
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unit, with no more than 1/2 inch (12 mm) water pressure
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3. The appliance and its individual shut off valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 PSIG. (3.45 KPA).
4. The appliance must be isolated from the gas supply
piping system by closing its individual manual shut off
valve during any pressure testing of the gas supply piping
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(3.45 KPA).
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have been made in a clean manner and have been
purged, so that the piping compound, chips, etc., will not
clog valves and/or controls. Use pipe joint sealant that is
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7. Each thermostat controls one zone burner through a
combination dual solenoid/pressure regulator valve,
complete with a pressure test spigot. The gas pressure
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unit is installed to ensure that the gas pressure is the
same as specified on the Serial/Rating plate. For access
to the pressure test spigots, turn the main power switch
and all zone power switches to the “OFF” position as
a safety precaution, and hinge the lower front panel
downwards. Pressure test spigots are located at the rear
of each combination valve, including pilot combination
valves. When your manometer is connected to the
first combination valve for test, turn the manual shut
off valve, located under the unit, to the open position
(valve handle in line with piping). Turn the main power
switch to “ON” and turn all zone power switches to “ON”.
All thermostat dials should be set to approximately
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reading on the manometer. If not in accordance with the
pressure specified on the Serial/Rating Plate, adjust the
combination valve regulator accordingly. When satisfied
with manometer reading, turn the main power switch to
“OFF”, remove the manometer test tube and recap the
test spigot. Repeat this operation on each combination
valve until each pressure regulator is set correctly. Turn
each thermostat, zone power switch and main power
switch to “OFF.
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disturbed before replacing front panels.
Electrical Connection
IMPORTANT: This appliance must be electrically grounded in
accordance with local codes, or in the absence of local codes,
with the Canadian Electrical Code C22.1 or with the National
Electrical Code ANSI/NFPA No. 70 (latest edition), whichever
is applicable.
WARNING: Electrical Grounding Instructions.
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hazard and should be plugged directly into a properly
grounded three prong receptacle. Do not cut or remove
the grounding prong from this plug.
2. A separate 15 amp service must be provided. For 120 volt
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with a three prong plug which fits any standard 120 volt,
three prong grounded receptacle.
3. When the unit is ordered and build for 208/240 volt, the
supply line must be connected to the wiring terminations
located inside the terminal box. For ease in attaching the
supply line, there is a removable cover on the terminal
box. A wiring diagram is attached to the rear panel of
each unit.
Ventilation
The unit must be installed in a location in which the facilities
for ventilation permit satisfactory combustion of gas and
proper venting. Proper ventilation is imperative for good
operation of the appliance. The ideal method of ventilating a
gas unit is the use of a properly designed ventilating canopy,
which should extend at least
6” (152 mm) beyond all sides of the appliance (except against
the wall, if the canopy is a wall installation). This is usually
part of a mechanical exhaust system.
1. Appliances shall be located so as not to interfere with
proper circulation of air within the confined space. All gas
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