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INLET GUIDE SEAL REPLACEMENT
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the Removal and Repair Guide
The inlet guide seal is
located on the inlet guide that fits over the upper inlet water tube. It
will be necessary to remove the heater from the wall and the control board,
in order to replace the seal and the inlet guide itself.
Required Tools: Large & small
Phillips screw drivers, battery powered volt meter, rag, bucket, two pipe
wrenches, needle nose pliers, heat sink compound and Teflon tape pipe
sealer.
WARNING:
To avoid electrical shock, make sure that all of the power is off to the
heater before attempting to remove the old inlet guide seal and while
installing the new seal.
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Turn off all the power to the heater. Confirm the power is off with a
voltmeter, even if the status light (or LED) on the control board
is off. There may be multiple breakers powering your model heater.
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Open a hot water faucet nearby. While the water is running, turn off
the water supply to the heater. This will help siphon some of the water
out of the heater.
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Using a large Phillips screw driver, remove the six screws from
the right bottom clean out plate on the under side of the heating chamber
to drain the remaining water from the heater into a bucket. Replace
the plate after draining.
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Remove the control board according to procedure A. Changing The
Control Board.
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Using two pipe wrenches, disconnect the incoming and outgoing
water lines threaded onto the top of the inlet and outlet fittings. Use
the rag to prevent any water dripping or spraying, which should be
very little if any.
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Back out the AC power wires through the right side of the metal base
pan.
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Remove the entire heater assembly from the wall by removing the 4
mounting screws.
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Remove the four Phillips head screws in the back of the assembly that
hold the heating chamber to the metal base pan.
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Remove the 2 small screws that hold the inlet guide to the top right
of the chamber assembly.
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Slide the inlet guide up the inlet tube to expose the seal. Be careful
not to pull the pipe outward as it may damage the lower inlet port.
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Note: If it is necessary at this point to remove the inlet guide for
replacement, then loosen the 2 screws in the heat sink and remove the
inlet tube to separate the inlet guide.
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Replace the seal and re-assemble in the reverse order
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Wrap the Teflon tape pipe sealer around the threads of the inlet
and outlet fittings before reconnecting the incoming outgoing water lines.
Do not use Plumber’s Putty or Pipe Dope on the
threads of the inlet and outlet fitting connections. If using CPVC or PVC
primer and glue, avoid contact of these substances with the heater’s inlet
and outlet fittings. These substances are highly corrosive and can damage
the inlet and outlet fittings. Leaks may occur as a result and cause
severe damage to the heater.
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Turn on the water and check for leaks.
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Re-install the control board and turn on the power to the heater. Make
sure that all of the circuits are on to power the heater.
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