Allied Air Enterprises 506271-01 - Manual (Page 6)

Page 6 of 14 506271-01 Issue 0921
Gas piping recommendations:
• A drip leg and a ground joint union must be installed in
the gas piping. A ground joint union is recommended by
the manifold/valve.
• When required by local codes, a manual shutoff valve
may have to be installed outside of the unit.
• Use pipe thread sealing compound resistant to propane
gas sparingly on male threads.
• The gas supply should be a separate line and installed
in accordance with all safety codes listed on page 1.
After the gas connections have been completed, open
the main shutoff valve admitting normal gas pressure
to the mains. Check all joints for leaks with soapy solution
or other material suitable for the purpose.
Never use a flame to check for gas leaks. Explosion
causing injury or death may occur.
WARNING
• The furnace and its individual manual shutoff 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 (3.48kPa).
• A 1/8" N.P.T. plugged tapping, accessible for test gauge
connections, must be installed immediately upstream
of the gas supply connection to the furnace.
Gas Connection
The gas supply line should be routed through the grommet
on the side of the unit.
The furnace must be isolated from the gas supply piping
system by closing the individual manual shutoff valve
during any pressure testing of gas supply piping system
at test pressures equal to or less than 1/2 psig or 14"
w.c. If the piping system is to be tested at pressures in
excess of 1/2 psig, the furnace and its individual shutoff
valve must be disconnected from the gas supply piping
system.
WARNING
Figure 4
2" Clearance Rear
24" Clearance
From Front
48" Overhead
Clearance
12" Clearance
(Both Sides)
To Unit Power Entry
Weatherproof
Disconnect Switch To
Power
Supply
NEC Class 1 Wiring
Thermostat
NEC Class 2 Wiring
To Low Voltage Entry
NOTE: All outdoor wiring must be weatherproof.
Vent Cover
Power Entry
Low Voltage Entry
Gas Entry
15" Clearance
To Vent Cover
Typical Field Wiring