Service - Lochinvar RESIDENTIAL GAS WATER HEATERS Instruction Manual

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. Turn off the gas to the water heater at the manual gas shut-off
valve.
2. Open a nearby hot water faucet until the water is no longer hot.
3. Close the cold water inlet valve.
4. Connect a hose to the drain valve and terminate it to an adequate
drain or external to the building.
5. 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.
6. 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 FOR
SELECTED MODELS WITH PLASTIC DRAIN VALVES
(See Figure 19)
1. Turn "OFF" gas supply to water heater.
2. Follow "Draining" instructions.
3. Turning counterclockwise (
screw handle.
4. Remove the was her 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 and Operating
Instructions" section to restart the water heater.

SERVICE

Before calling for repair service, read the "Start Up Conditions" and
"Operational Conditions" found in the "For Your Information" section of
this manual.
If a condition persists or you are uncertain about the operation of the
water heater contact a service agency. If you are not thoroughly familiar
with gas codes, your water heater, and safety practices, contact your
gas supplier or qualified installer to check the water heater.
Use the "Leakage Checkpoints" 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.
Read this manual first. Then before checking the water heater make
sure the gas supply has been turned "OFF", and never turn the gas
"ON" before the tank is completely full of water.
Never use this water heater unless it is completely filled with water. To
prevent damage to the tank, the tank must be filled with water. Water
must flow from the hot water faucet before turning "ON" gas to the
water heater.
21
), remove the hex cap below the
FIGURE 20.