John Wood JW375T75N-AV, Инструкция по эксплуатации

Страница: 24 / 36

24
TANK CLEANOUT PROCEDURE
The following practices will ensure longer life and enable the unit to
operate at its designed efficiency:
1. Once a month the heater should be flushed. Open the drain valve
and allow two gallons of water to drain from the heater. Inlet water
valve should remain open to maintain pressure in tank.
2. A cleanout opening is provided for periodic cleaning of the tank.
Gas must be shut off and heater drained before opening cleanout.
To clean heater through cleanout opening, proceed as follows:
1. Drain heater.
2. Remove outer cover plate from lower side of heater jacket.
3. Remove six (6) hex head screws securing tank cleanout plate
and remove plate.
4. Remove lime, scale, or sediment using care not to damage the
glass lining.
5. Inspect cleanout plate gasket, if new gasket is required, see
replacement parts list for item number.
6. Install cleanout plate. Be sure to draw plate up tight by tightening
screws securely.
7. Replace outer jacket cover plate.
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 Features And Components
in this manual for the location of the water heater components
described below.
Burn harzard.
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. Close the cold water inlet valve to the water heater.
6. Connect a hose to the water heater drain valve and
terminate it to an adequate drain.
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 WATER HEATER STORAGE TANK:
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.
5. 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.
6. Open the water heater drain valve to flush the storage tank.
7. Flush the water heater storage tank to remove sediment
and allow the water to flow until it runs clean.
8. Close the water heater drain valve when flushing is
completed.
9. Remove the drain hose.
10. Fill the water heater - see Filling The Water Heater in this manual.
11.
Turn on the electrical supply to place the water heater back
in operation.
12. Turn on the gas supply to the water heater at the Main Gas
Shutoff Valve.
13. Allow the water heater to complete several heating cycles
to ensure it is operating properly.
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.
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.