Installation Guide

31 Page
Installaon
Installaon Manual
WATER CONNECTIONS
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
Do not reverse the hot outlet and cold inlet connections to the water heater. This will
prevent the water heater from activating properly.
NOTICE
All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for
potable water systems.
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 recommend-
ed on the hot water outlet of the unit. If the water
heater is installed within, or subjected to, a closed loop
water system, a thermal expansion tank
or code approved device to handle thermal expansion
must be installed.
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 to trap debris from entering your heater. This will need
to be cleaned periodically to maintain optimum flow. (Refer to p. 51.)
Cold
inlet
Hot
outlet
Gas inlet
As Close as
Possible
Pressure relief valve
-Pressure relief valve-
The water heater has a high-temperature shutoff switch built in as a standard safety feature (called a
Hi-Limit switch) therefore a “pressure only” relief valve is required.
 This unit does not come with an approved pressure relief valve.
 An approved pressure relief valve must be installed on the hot water outlet.
 The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must follow local codes.
 The discharge capacity must be at least 160,000 BTU/h for the 240 model, 180,000 BTU/h for the 340
model, and 199,000 BTU/h for the 540 model.
 The pressure relief valve needs to be rated for a maximum of 150 psi (1 MPa).
 The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash
outward and cause damage or personal injury.
 Attach the discharge tube to the pressure relief valve and run the end of the tube to within 6 in
(152 mm) from the floor. This discharge tube must allow free and complete drainage without any
restrictions.
 If the pressure relief valve discharges periodically, this may be due to thermal expansion in a closed
water supply system. Contact the water supplier or a local plumbing professional on how to correct
this situation. Do not plug the pressure relief valve.
 The pressure relief valve must be manually operated periodically to check for correct operation.
Before operating the valve manually, check that it will discharge in a place for secure disposal.
 No valve must be placed between the relief valve and the water heater.
WARNING
Hot water could be released when the pressure relief valve is opened. This
could result in severe personal injury. Before operating the pressure relief
valve manually, check that it will discharge in a safe place. If water does not
flow freely from the end of the discharge pipe, turn the gas supply and power
OFF and call a qualified person to determine the cause.
Refer to the pressure relief valve manufacturer's instructions for inspection
and maintenance requirements.