International comfort products C9MPX Installation Instructions Manual page 36

Typical Gas Piping for Downflow
Figure 38
Use elbows and 3, (76.2mm) pipe nipple to connect
valve to piping when using left side gas pipe entry.
Drip Leg and Union, Union* should be outside the cabinet.
Manual shut−off valve MUST be upstream of dripleg, union,
and furnace.
*Union may be installed inside the cabinet when necessary
because of clearances.
Additional Propane Connection Requirements
1. Have a licensed Propane gas dealer make all connections
at storage tank and check all connections from tank to
furnace.
2. If copper tubing is used, it MUST comply with limitation set in
National Fuel Gas Code or CGA codes.
3. Two−stage regulation of Propane gas is recommended.
Propane Conversion
An accessory kit shall be used to convert to propane gas use, see
the furnace rating plate for the Propane conversion accessory kit
part number.
WARNING
!
FIRE, EXPLOSION, UNIT DAMAGE HAZARD
Failure to follow this warning could result in death,
property damage and/or personal injury.
A Propane conversion accessory kit is required
when operating the furnace with Propane gas.
36
Propane Low pressure
switch. Optional
Propane conversion.
Representative drawing only, some models may vary in appearance.
Specifications are subject to change without notice.
Manual shut-off
valve
Vent Pipe Grommet
(Single Pipe)
Supply Pressure
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in
personal injury, death, and/or property damage.
Do NOT set input rating above that shown on rating
plate.
1
1. A / " NPT plugged tapping, accessible for a test gauge
8
connection, must be installed immediately upstream of the
gas supply connection to the furnace.
2. Gas input to burners MUST NOT exceed the rated input
shown on rating plate.
3. Do NOT allow minimum gas supply pressure to vary
downward. Doing so will decrease input to furnace. Refer to
Table 6 and Table 7 for normal gas supply and manifold
pressures.
Manifold Gas Pressure Adjustment
SEE CHECKS AND ADJUSTMENTS, Manifold Gas Pressure
Adjustment in this manual.
Alternative
installation
440 01 1051 02