Draining And Flushing - Lochinvar LTN07575 Instruction Manual

DRAINING AND FLUSHING

It is recommended that the water heater storage tank be
drained and flushed every 6 months to reduce sediment
buildup. The water heater should be drained if being shut
down during freezing temperatures. See
location of the water heater components described below.
TO DRAIN THE WATER HEATER STORAGE TANK:
1. Turn off the gas supply at the Main Gas Shutoff Valve
if the water heater is going to be shut down for an
extended period.
2. Ensure the cold water inlet valve is open.
3. Open a nearby hot water faucet and let the water run
until the water is no longer hot.
4. Close the cold water inlet valve to the water heater.
5. Connect a hose to the water heater drain valve and
terminate it to an adequate drain.
6. Open the water heater drain valve and allow all the
water to drain from the storage tank.
7. Close the water heater drain valve when all water in
the storage tank has drained.
8. Close the hot water faucet opened in Step 4.
9. If the water heater is going to be shut down for an
extended period, the drain valve should be left open.
for the
Figure 25
Burn harzard.
Hot water discharge.
Keep hands clear of drain
valve discharge.
TO FLUSH THE WATER HEATER STORAGE TANK:
1. Ensure the cold water inlet valve is open.
2. Open a nearby hot water faucet and let the water run
until the water is no longer hot. Then close the hot
water faucet.
3. Connect a hose to the drain valve and terminate it to
an adequate drain.
4. Ensure the drain hose is secured before and during
the entire flushing procedure. Flushing is performed
with system water pressure applied to the water
heater.
5. Open the water heater drain valve to flush the storage
tank.
6. Flush the water heater storage tank to remove
sediment and allow the water to flow until it runs clean.
7. Close the water heater drain valve when flushing is
completed.
8. Remove the drain hose.
9. Fill the water heater - see
(page 15) .
10. Turn on the gas supply to the water heater at the Main
Gas Shutoff Valve.
11. Allow the water heater to complete several heating
cycles to ensure it is operating properly.
30
Filling the Water Heater