DHW Demand
DHW
186°F
156°F
Target = 186°F
Ion-ic
Gas Flow
External Manual
Gas Shut O
Valve (Must Be
Within 6” of the
Boiler )
Sediment Trap
Min. Length of 3"
Tee Fitting
Cap
Union Fitting
40
CHAPTER 7
CHAPTER 7 - GAS PIPING
7.1. 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 3/4” NPT for INSTINCT pipe union at the gas
nipple, for ease of service.
2. I
nstall a manual shuto valve in the gas supply piping as
shown in Fig. 25 on the right. For installations in Canada, 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 INSTINCT gas train
as shown in Fig. 25 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 INSTINCT into operation, 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 INSTINCT 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 substan-
tial 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.
• 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.
NOTICE
WARNING
WARNING
Fig. 25 - Recommended Gas Supply Piping
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