Intellihot iN199, Installation & Operation Manual

Page: 20 / 78

iN199 Gas Connection 16
November 2021 - Revision 00
6.9 Connecting Gas Line to Unit
Note : Always clean the inside of the gas line of any dirt or
debris before connecting the piping to the unit.
Main Supply
Line
Drip
Leg
Manual
Shut-off
Valve
Note: Individual gas regulators not shown for clarity.
Main Supply
Line
Drip
Leg
Drip
Leg
Drip
Leg
Drip
Leg
Manual
Shut-off
Valve
Manual
Shut-off
Valve
Manual
Shut-off
Valve
Manual
Shut-off
Valve
Note: Individual gas regulators not shown for clarity.
1. Install a flanged steel coupling and gasket with a short
piece of 3/4" NPT black pipe.
Note: Individual gas regulators not shown for clarity.
2. Install a manual shut-off valve as described in “6.8 Gas
Pipe Drip Leg and Shut-off Valve” on page 15.
Union
Shut-off
Valve
Note: Wye-Strainer not shown for clarity.
3. Install a drip leg as described in “6.8 Gas Pipe Drip Leg
and Shut-off Valve” on page 15.
4. Continue installing pipe to reach the main gas supply
connection.
5. Test all gas pipe connections.
a. All the gas pipe connections should be tested as
prescribed in NFPA 54.
b. In multiple unit applications, each unit should be
isolated before testing any piping system as pressure
might exceed the allowable pressure of 14.0” WC.
NOTICE
Do not fire (operate) the water heater until all connections
have been completed and the heat exchanger is filled with
water.