Westinghouse WGRT 150 Series Installation Start-Up Maintenance Parts page 68

8. Replace the front cover of the water heater cabinet. Reconnect power supply to the water heater.
9. Press the Power button on the control panel to turn on the water heater.
Check Primary and Gas Piping

Remove the water heater cover and perform a gas leak inspection following Operating Instructions, page 2, this manual. If gas
odor or leak is detected, follow procedures on page 2. Call a qualified service technician.

Visually inspect for leaks around the internal water heater water connections and around the heat exchanger. Visually inspect
the external system piping, circulators, and system components and fittings. Immediately call a qualified service technician to
repair any leaks
Have leaks fixed at once by a qualified service technician. Failure to comply could result in substantial property damage, severe
personal injury, or death.
Operate Pressure Relief Valve

Before proceeding, verify that the relief valve outlet has been piped to a safe place of discharge, avoiding any possibility of
scalding from hot water.

Shut power off to the water heater. To avoid scalding, wait for water heater to cool before operating the relief valve.
To avoid water damage or scalding due to relief valve operation, a discharge line must be connected to the valve outlet and directed to
a safe place of disposal. This discharge line must be installed by a qualified service technician or heating/plumbing installer in
accordance with the water heater installation manual. The discharge line must be terminated so as to eliminate possibility of severe
burns or property damage should the valve discharge.

List the relief valve lever. If water flows freely, release the lever and allow the valve to seat. Watch the end of the relief valve
discharge pipe to ensure that the valve does not weep after the line has had time to drain. If the valve weeps, lift the lever
again to attempt to clean the valve seat. If the valve does not properly seat and continues to weep, contact a qualified service
technician to inspect the valve and system.

If water does not flow from the valve when you completely lift the lever, the valve or discharge line may be blocked.
Immediately shut the water heater down per instructions on page 2 and call a qualified service technician to inspect the valve
and system.

If relief valve seats properly, restore power to the water heater. Observe operation for five minutes and ensure it operates
properly.
Check the Burner
Clean the exterior of the burner.
Cleaning the Cold Water Inlet Filter (Draining the Water Heater)
1. Place a bucket under the appliance to collect the residual water inside the water heater.
2. Press the Power button on the control panel to turn off the electrical power to the water heater. Then turn off the gas valve.
3. Valve off the water heater from the system. If the water heater cannot be isolated from the system, turn off the main water valve.
Open the hot water faucets in the system to aid in draining the system.
5. Remove the cold water inlet filter. Then clean it with a toothbrush and clean running water. See Figure 57.
Figure 56 – Draining the Water Heater
6. Reinstall the cold water inlet filter.
7. Restore water service to the water heater by opening the isolation valves, or turning on the main water valve.
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WHL-004 REV. 5.26.17