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TANKLESS
WATER HEATERS
Models & Prices
Tankless Water Heater Product Guide
Description / Specification
Tankless Water Heater Applications
Residential / Commercial
Tankless Water Heater Electrical Guide
Service Calculations
Tankless Water Heater Installation
Plumbing / Electrical
Tankless Water Heater Cost Comparisons
Reports / Listings
Tankless Water Heaters Service Guide
Remove / Repair
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INLET GUIDE SEAL REPLACEMENT
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.
- 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.
- 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.
- 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.
- Remove the control board according to procedure
A. Changing The Control Board.
- 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.
- Back out the AC power wires through the
right side of the metal base pan.
- Remove the entire heater assembly from the
wall by removing the 4 mounting screws.
- Remove the four Phillips head screws in
the back of the assembly that hold the heating chamber to the metal
base pan.
- Remove the 2 small screws that hold the
inlet guide to the top right of the chamber assembly.
- 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.
- 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.
- Replace the seal and re-assemble in the
reverse order
- 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.
- Turn on the water and check for leaks.
- 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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