Gas Pressure
WARNING
Exposure to a higher gas supply pressure may cause damage to the control, resulting in explosion or fire. Consult your local gas supplier and gas authorities. DO NOT PUT INTO SERVICE IF
GSW Water Heating Company recommends that the gas supply pressure, as measured on the inlet side of the water heater control, be set at 7.0 in. w.c.(1.7 kPa) for natural gas and 11.0 in. w.c. (2.7 kPa) for propane gas. The above pres- sures must be measured during water heater operation. The gas control supplied with this water heater is designed for a maximum inlet pressure of 0.5 psi (14 in. w.c.). Do not exceed 0.5 psi (14 in. w.c.). The Flame GuardTM safety sys- tem is designed to operate at a manifold pressure of 5.0 in. w.c. (1.2 kPa) for natural gas and 10.0 in. w.c. (2.4 kPa) for propane gas.
Gas line purging
Gas line purging is required to eliminate air from the piping system. Purging should be performed by persons experi- enced in this type of gas service in compliance with the code having jurisdiction. Do not purge in confined areas or space where ignition may occur. To avoid risk of fire or explosion ensure the area is well ventilated and all sources of ignition are
Gas Leak Testing
Important: This water heater and its gas connection must be tested for leaks before placing the appliance in opera- tion. Perform a leak test at normal gas pressure. If the appli- cable code(s) require the gas lines to be tested at a pres- sure of 14 in. w.c. (3.5 kPa) or greater, the water heater and its manual
DO NOT light the burner before the tank is filled with water and you have confirmed that there are no leaks in the pip- ing and connections.
– 8 –
