Greenheck DGX Installation, Operation And Maintenance Manual page 11

Step 2 Install Additional Regulator if
Required
When the supply gas pressure exceeds the maximum
gas pressure shown on the direct gas nameplate, an
additional regulator (by others) is required to reduce
the pressure. The regulator must have a listed leak
limiting device or it must be vented to the outdoors.
Step 3 Connect the Supply Gas Line
A manual shut off valve (gas cock), 1/8 in. plugged
test port and 6 in. drip leg must be installed prior to
the gas train. The valve and the test port must be
accessible for the connection of a test gauge. Supply
gas connections must be made by a qualified installer
and are not furnished by Greenheck. See figure #23.
Step 4 Test the System for Leaks
Check both the supply lines and the factory piping for
leaks. Apply a soap and water solution to all piping
and watch for bubbling which indicates a leak.
The factory piping has been checked for leaks, but should be rechecked due to shipping and
Installation - Direct Gas Piping
WARNING!
installation.
The regulator located inside the unit is used to
adjust the unit's maximum output temperature.
Gas Cock
From
Gas
Supply
Figure 23. Supply Gas Line
NEVER test for a gas leak with an open flame.
11
NOTE!
Ground Joint Union
Make-Up
Air Unit
1/8 in. Plugged Tap
6 in. Trap
WARNING!