Detroit Radiant Products Company UH Series - Manual (Page 20)

20
UH Series
Leak Testing
Always leak test final gas assembly for gas leaks according to the procedures outlined in NFPA 54 and
all local codes and/or Standards.
For leak testing on pressures below ½” PSI
Before leak testing, close the field installed manual shut off valve shown on Figure 3.4 on the supply
line to isolate the gas valve from the pressure.
NOTE: All factory installed gas connections have passed an approved leak test.
For leak testing on pressures above ½” PSI
When leak testing with pressures above ½” PSI (14 inches W.C.), the unit must be isolated from the
supply pipe. Close the field installed manual shut off valve, disconnect the supply line to the unit, and
temporarily cap the supply line for testing purposes.
WARNING
!
Use a soap solution or equivalent for leak testing. Never test for leak with an open
flame. Failure to comply could result in personal injury, property damage or death.
Sediment
Trap
1/8-in. NPT Test
Connection (Plugged)
Shut Off
Ground Joint Union
Gas Supply Line
3-in.
Minimum
Flow of
Gas
To Unit
WARNING
!
Gas pressures to the appliance controls must never exceed 14 inches W.C. (1/2”
PSI). Supply pressures greater than 14” W.C. can damage the controls, resulting in
personal injury, property damage, or death.
3.0 Installation • Gas Supply Installation Instructions • Leak Testing
Figure 3.4 • Recommended Hardware – Manual Shut Off and Sediment Trap