1017757-A
Page 10
FIG. 7
INSTALLATION
FIG. 8
TO HEATER GAS
CONTROL VALVE
MANUAL CUT-OFF VALVE
DRIP LEG
1/8” NPT
PRESSURE TAP
GAS
SUPPLY
LINE
GAS CONNECTION
This heater must be connected to a gas supply capable of
supplying the full rated capacity. Provide a 1/8 inch N.P.T.
plugged tapping, accessible for test gauge connection,
immediately upstream of the gas supply connection to the
appliance.
The gas supply piping should be sized in accordance
with ANSI Z223.1 National Fuel Gas Code.
7” w.c.
14” w.c.
3.5” w.c.
10.0” w.c.
NATURAL
GAS
PROPANE
GAS
4.5” w.c.
11.0” w.c.
Maximum Inlet Pressure
(Must
NEVER
Exceed):
Normal Manifold Pressure:
(Pre-set at the factory)
GAS SUPPLY PIPE
Minimum Inlet Pressure
(For purpose of input adjustment)
:
Vent Terminal
Spacer Plate
Outside Wall
Wall Thimble
Extension
Wall Thimble
Assembly
Vent Terminal
Wall Stud
Inside Wall
If the outlet pressure of the gas valve must be adjusted, this
must be done by a qualified service technician using proper
tools and instruments.
Check all connections with soapy water for possible gas
leaks. Never use a match, candle or other ignition source.
It is recommended that pipe compound which is resistant to
the action of liquefied petroleum gases be used. Do not use
Teflon tape or Teflon impregnated compound.
The appliance and its individual shutoff valve must be
FOR CDV15, CDV25 and CDV33
disconnected from the gas supply piping during any
pressure testing of that system at test pressure in excess
of ½ psig.
The appliance must be isolated from the gas supply piping
by closing its individual manual shutoff valve during any
pressure testing of the gas supply piping system at test
pressures equal to or less than ½ psig.
