Installation / Operation Instruction Manual

The FT Series Heating Only, Boiler
Page 35
4.10 Gas Supply Pressure
The appliance and its individual shut-o󰀨 valve must be disconnected from the gas supply piping system during
any pressure testing of the system at test pressures in excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the gas supply piping system by closing its individual manual shut-o󰀨
valve during any pressure testing of the gas supply piping system at test pressures equal to or greater than
1/2 psi (3.5 kPa).
Loosen the pressure port screws before you check the gas inlet pressure.
Inlet Gas Pressure Port
Manifold Pressure Port
Inlet Gas Pressure Port
Manifold Pressure Port
The minimum and maximum inlet gas line pressures must be
Natural Gas LP Gas
Maximum Pressure 10.5˝ WC Maximum Pressure 13.0” WC
Minimum Pressure 3.5˝ WC Minimum Pressure 8.0” WC
Gas Valve
199 MBH
Gas Valve
100 - 140 MBH
CAUTION