Install Instructions

63
MAINTENANCE SCHEDULE
TABLE 17
COMPONENT OPERATION INTERVAL REQUIRED
Tank
Sediment
Removal
Semi Annually Flushing
Tank
Lime Scale
Removal
Semi Annually UN-LIME®
Anode Rods
Inspection
Cleaning
Annually
Clean Scale
Deposits
T&P Valve Test Operation Semi Annually Test
Vent System Inspection Annually
Termination
Screens Clean
Reseal/Repair
DRAINING AND FLUSHING
It is recommended that the water heater storage tank be drained
and ushed every 6 months to reduce sediment buildup. The
water heater should be drained if being shut down during freezing
temperatures. See Features And Components on page 7 for
the location of the water heater components described below.
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 Shutoff Valve if the
water heater is going to be shut down for an extended period.
3. Ensure the cold water inlet valve is open.
4. Open a nearby hot water faucet and let the water run until the
water is no longer hot.
5. Connect a hose to the water heater drain valve and terminate
it to an adequate drain.
6. Close the cold water inlet valve.
7. Open the water heater drain valve and allow all the water to
drain from the storage tank.
8. Close the water heater drain valve when all water in the
storage tank has drained.
9. Close the hot water faucet opened in Step 4.
10. If the water heater is going to be shut down for an extended
period, the drain valve should be left open.
To Flush the tank perform the following steps:
1. Turn off the electrical supply to the water heater.
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. Then close the hot water faucet.
4. Connect a hose to the drain valve and terminate it to an
adequate drain.
MAINTENANCE
GENERAL
Do not have any combustible materials (such as gasoline,
ammable liquids or ammable vapors) within the water heater
area. See Locating The Water Heater on page 11.
Water heater maintenance includes periodic tank ushing and
cleaning, and removal of lime scale. The water heater should
be inspected and adjusted to maintain proper combustion.
See Initial Start Up on page 53. A periodic inspection of the
venting system should be made. Where used, water circulating
pump(s) should be oiled according to the pump manufacturers
recommendations.
PRECAUTIONS
Do not operate the water heater if it has
been exposed to or exhibits the following:
Exposed to flooding or water damage
.
•
External damage.
•
Firing without water.
•
Sooting.
•
Do not operate the water heater until all corrective steps
have been made by a qualified service technician.
CAUTION
Never operate the water heater without rst being certain it is
lled with water and a properly sized and rated Temperature-
Pressure Relief Valve is installed in the relief valve opening on
the water heater. See Temperature-Pressure Relief Valve on
page 15.
Explosion Hazard
Overheated water can cause
water tank explosion.
Properly sized temperature and
pressure relief valve must be
installed in the opening provided.
Should overheating occur or the gas supply fail to shut off, turn
off the Main Gas Shutoff valve. See Figure 54 on page 40.
Water heater maintenance includes periodic tank ushing and
cleaning, and removal of lime scale. The water heater should
be inspected and adjusted to maintain proper combustion.
Refer to the following table. A periodic inspection of the venting
system should be made. Where used, the water circulating
pump should be oiled according to the pump manufacturer's
recommendations.