Installation Guide

33 Page
-Measuring inlet gas pressure-
The water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions on
how to check the inlet gas pressure. THIS IS ONLY TO BE DONE BY A LICENSED PROFESSIONAL.
WATER CONNECTIONS
All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for
potable water systems. Also, an automatic air vent or air separator must be installed. This equipment
must be installed according to its manufacturer's instructions.
1. A manual shutoff valve must be installed on the cold water inlet to the water heater between the main
water supply line and the water heater.
2. In addition, a manual shutoff valve is also recommended on the hot water outlet and return inlet of
the unit. A thermal expansion tank or code approved device to handle thermal
expansion must be installed.
Installaon
Installaon Manual
1. Shut off the manual gas valve on the gas supply line.
2. Remove the screw for the pressure port located on the
gas inlet of the water heater shown in the diagram on
the right.
3. Connect the manometer to the pressure port.
4. Re-open the manual gas valve. Check to see that there
are no gas leaks. Open some of the fixtures that use the
highest flow rate to turn on the water heater.
5. Check the inlet gas pressure. When the water heater
is on maximum and minimum burn, the manometer
should read from 4.0” to 10.5” W.C. (1.00 to 2.61 kPa) for
Natural gas, from 8.0” to 14.0” W.C. (1.99 to 3.48 kPa) for
Propane.
3. Before installing the water heater, flush
the water line to remove all debris, and
after installation is complete, purge the
air from the line. Failure to do so may
cause damage to the heater.
4. There is a wire mesh filter within the
cold inlet and return inlet to trap debris
from entering your heater. This will need
to be cleaned periodically to maintain
optimum flow. (Refer to p. 63.)
Pressure port
Do not use this appliance if any part has been under water. Immediately contact
a qualified installer or service agency to replace a flooded water heater. Do not
attempt to repair the unit! It must be replaced!
WARNING
1. Turn off all electric power to the water heater if service is to be performed.
2. Turn the manual gas valve located on the outside of the unit clockwise to the off
position.
3. Failure to follow these steps could lead to fire or explosion, resulting in personal
injury or death.
WARNING
Do not reverse the hot outlet and cold inlet connections to the water heater. If you
reverse the connections, the water heater will not activate properly.
NOTICE
Cold
inlet
Hot
outlet
Gas inlet
As Close as
Possible
Pressure
relief
valve
Return
inlet