Draining And Flushing; To Drain The Water Heater Storage Tank; To Fl Ush The Water Heater Storage Tank - Smith BTF-80 SERIES 210 Installation And Operating Manual

Temperature-pressure relief valve leakage due to pressure
build up in a closed system that does not have a thermal
expansion tank installed is not covered under the Limited
Warranty. Thermal expansion tanks must be installed on
all closed water systems.
WARNING

DRAINING AND FLUSHING

Periodic draining and cleaning of sediment from the tank
maybe necessary. 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. See "Typical Installation" section in this
manual for location of the water heater components
described below.
DANGER
HOT
HOT
BURN
331432-00
Explosion Hazard
•
Temperature-pressure relief
valve must comply with ANSI
Z21.22-CSA4.4 and ASME
code.
•
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
•
Do not plug, block, or cap the
discharge line.
•
Failure to follow this warning
can result in excessive tank
pressure, serious injury or
death.
• Burn hazard.
• Hot water discharge.
• Keep hands clear of drain
valve discharge.

To drain the water heater storage tank:

1. Turn "OFF" the electrical supply to the water heater.
2. Turn "OFF" the gas supply at the Main Gas shut-off
Valve if the water heater is going to be shut down for
an extended period.
3. CLOSE the cold-water inlet valve to the water heater.
4. OPEN a nearby hot-water faucet and leave open to
allow for draining.
5. Connect a hose to the drain valve and terminate to
an adequate drain.
Note: If the water heater is going to be shut down and
drained for an extended period, the drain valve should be
left open with hose connected allowing water to terminate
to an adequate drain.
6. Close the water heater drain valve when all water in
the storage tank has drained.
7. Follow instructions in the "Filling The Water Heater"
section.
8. Turn "ON" the gas supply at the main gas shut-off
valve.
9. Follow the lighting instructions on the label or see
"Lighting Instructions" to restart the water heater.
To fl ush the water heater storage tank:
1. Turn "OFF" the electrical supply to the water heater.
2. Ensure the cold-water inlet valve is open.
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 fl ushing procedure. Flushing is performed with
system water pressure applied to the water heater.
5. Open the water heater drain valve to fl ush the storage
tank. Caution: Water will be hot.
6. Flush the water heater storage tank to remove
sediment and allow the water to fl ow until it runs clean.
7. Close the water heater drain valve when fl ushing is
completed.
8. Remove the drain hose.
9. Ensure the heater is full of water.
10. Turn "ON" electrical supply to place water heater back
in operation and follow the lighting instructions.
11. Allow the water heater to complete several heating
cycles to ensure it is operating properly.
Caution: Do not turn on power to the water heater unless
the tank is full. Open a hot-water faucet and allow the
water to run until the air is purged and the water fl ows
uninterrupted from the faucet.
Important: When operating a cold tank, condensation can
occur and drip on the burner. This should not be confused
with a tank leak.
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