Draining And Flushing; Drain Valve Washer Replacement; Service - Lochinvar POWER DIRECT VENTED GAS MODELS Instruction Manual

You may have a check valve installed in the water line or a water
meter with a check valve. Consult your local water supplier or service
agency for further information. Do not plug the temperature-pressure
relief valve.

DRAINING AND FLUSHING

It is recommended that the tank be drained and fl ushed every 6
months to remove sediment which may build up during operation. The
water heater should be drained if being shut down during freezing
temperatures. To drain the tank, perform the following steps:
1. Set the blower switch to the "OFF" position.
2. Turn off the gas to the water heater at the manual gas shut-off
valve.
3. Open a nearby hot water faucet until the water is no longer
hot.
4. Close the cold water inlet valve.
5. Connect a hose to the drain valve and terminate it to an
adequate drain or external to the building.
6. Open the water heater drain valve and allow all of the water to
drain from the tank. Flush the tank with water as needed to
remove sediment.
7. Close the drain valve, refill the tank, and restart the heater as
directed in this manual.
If the water heater is going to be shut down for an extended period,
the drain valve should be left open.
IMPORTANT: Condensation may occur when refi lling the tank and
should not be confused with a tank leak.

DRAIN VALVE WASHER REPLACEMENT

(See Figure 34)
1. Turn "OFF" gas supply to water heater.
2. Follow "Draining" instructions.
3. Turning counterclockwise (
screw handle.
4. Remove the washer and put the new one in place.
5. Screw the handle and cap assembly back into the drain valve and
retighten using a wrench. DO NOT OVER TIGHTEN.
6. Follow instructions in the "Filling The Water Heater" section.
7. Check for leaks.
8. Follow the lighting instructions in the "Lighting" section to restart
the water heater.

SERVICE

If a condition persists or you are uncertain about the operation of the
water heater contact a service agency.
Use this guide to check a "Leaking" water heater. Many suspected
"Leakers" are not leaking tanks. Often the source of the water can
be found and corrected.
If you are not thoroughly familiar with gas codes, your water heater,
and safety practices, contact your gas supplier or qualifi ed installer
to check the water heater.
28
), remove the hex cap below the
FIGURE 34.