Install Instructions

Union Fitting
Gas Flow
Tee Fitting
Cap
Sediment Trap
Min. Length of
3”
External Manual
Gas Shut Off Valve
(Must Be Within 6’
of the Boiler )
2525
CHAPTER 6
CHAPTER 6 - GAS PIPING
6.1. Gas Supply Piping Connection
The gas supply piping must be installed in ac-
cordance to all applicable local, state, national
codes, and utility requirements.
1. Install a 1/2” NPT pipe union at the gas nipple, for
ease of service.
2. Install a manual shuto valve in the gas supply piping
as shown in Fig. 13 on the right. For installations in Can-
ada, the installer must tag and identify the main shuto
valve.
3. Install a sediment trap (drip leg) on the gas supply
line prior to connecting to the PRESTIGE Excellence
gas train as shown in Fig. 13 on the right.
4. Support the gas piping using hangers. Do not sup-
port the piping by the unit or its components.
5. Purge all air from the gas supply piping.
6. Before placing the PRESTIGE Excellence into opera-
tion, check and test all connections for leaks.
• Close the manual shuto valve during any pres-
sure test with less than 13”w.c..
• Disconnect the PRESTIGE Excellence and its gas
valve from the gas supply piping during any
pressure test greater than 13”w.c..
Do not check for gas leaks with an open flame.
Use a gas detection device or bubble test. Fail-
ure to check for gas leaks can cause substantial
property damage, serious injury, or death.
7. Use pipe dope compatible with natural and pro-
pane gases. Apply sparingly only to the male
threads of pipe joints so that pipe dope does not
block gas ow.
• Failure to apply pipe dope as detailed
above can result in substantial property
damage, serious injury, or death.
NOTICE
WARNING
WARNING
• Use a two-wrench method when tight-
ening field piping onto the boiler piping
connections. Use one wrench to prevent
the boiler connections from turning and
the second to tighten field piping. Failure
to support the boiler piping connections
could damage piping, causing a leak, re-
sulting in substantial property damage,
serious injury, or death.
WARNING
Fig. 13 - Recommended Gas Supply Piping