331551-002
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•
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.
Explosion Hazard
WARNING
Anode Maintenance
A new anode is about 13/16 in. to 7/8 in. diameter and has a
steel wire core approximately 1/8 in. diameter in the center. If
the anode is less than approximately 3/8 in. in diameter, or the
inner steel core is exposed, the anode(s) should be replaced
(see Figure 16). Operating a water heater without an actively
working anode(s) will void the warranty.
To check/replace the anode:
1. Turn "OFF" the electrical supply to the water heater.
2. Turn off the oil supply to the water heater.
3. Close the cold water supply valve.
4. Open a nearby hot water faucet served by the system to
depressurize the system.
5. Connect a hose to the drain valve and drain 6 US gallons
as directed in "Draining And Flushing".
6. Close the drain valve.
7. Remove the anode cover, or, on JW F657, Rear and
Combination flue models, remove top cover, insulation
and flue top cover.
Note:
The anode(s) has been factory installed using a power
tool. It may be necessary for a second person to stabilize the
heater. A few sharp blows on the handle of the socket wrench
should loosen the anode nut. If an impact wrench (power
drive) is available, this is an easier way to remove an anode.
8. Using a 1 1/16" socket (certain models require 1-5/16”),
remove the anode(s) and inspect it. The surface may be
rough, full of pits and crevices, but this is normal. If it is
less than approximately 3/8 in. in diameter, or the inner
steel core exposed, the anode(s) should be replaced.
EXPOSED
SUPPORT
WIRE
EXPOSED
SUPPORT
WIRE
PITTED ANODE ROD
Figure 16. Anode Rod
9. Apply
Teflon
®
tape, or sealing compounds approved for
use with potable water, to the threads of the anode(s) and
install into the tank top.
10. Open the cold water supply valve and open a nearby hot
water faucet to purge air from the water tank as directed
in "Filling The Water Heater".
11. Check for leaks. Repair as required, and re-test.
12. Replace the covers and insulation.
13. Turn on the oil supply to the water heater.
14. Turn "ON" the electrical supply to the water heater.
Valve Washer Replacement
1. Turn "OFF" the electrical supply to the water heater.
2. Turn off the oil supply to the water heater.
3. Follow instructions in the "Draining And Flushing" section
to drain the tank.
4. Turning counterclockwise ( ), remove the hex cap below
the screw handle.
HANDLE AND
CAP ASSEMBLY
ALTERNATIVE
STEM HANDLE
WASHER
Figure 17. Drain Valve washer replacement
5.
Remove the washer and put the new one in place.
6. Screw the handle and cap assembly back into the drain
valve and re-tighten using a wrench. DO NOT OVER
TIGHTEN.
7. Follow the instructions in the "Filling The Water Heater"
section.
8. Check for leaks. Repair as needed.
9. Turn on the oil supply to the water heater.
10. Turn "ON" the electrical supply to the water heater.
Cleaning Instructions, Flue Passages Of The JW F657
Heater
Refer to Figure 18 for components of the heater.
1. Remove the casing top and lift the insulation off
completely. It is necessary to disconnect the hot and cold
water lines and move them out of the way. Do not remove
the nipples from the tank.
2. Lift off the flue collector. The flue collector has a lip on
the outer edge which will allow a hook to grab the edge
to help lift it up.
3. Remove the flue baffles (4).
4.
With a 3 in. diameter wire brush, 4 ft. long, remove any
soot build-up which may be on the top head or inside the
flue collector.
