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TANKLESS
WATER HEATERS
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Tankless Water Heater Product Guide
Description / Specification
Tankless Water Heater Applications
Residential / Commercial
Tankless Water Heater Electrical Guide
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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 WATER FITTING REPLACEMENT
The
threaded inlet water fitting (or nipple) is located vertically on the
right side of the heating chamber. It is attached to the heat sink, the
inlet guide and lower inlet guide. It will be necessary to remove the
control board.
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 fitting and while installing
the new inlet fitting.
- 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 water line threaded onto the top of the inlet fitting.
Use the rag to prevent any water dripping or spraying, which
should be very little if any.
- Rotate the heat sink by hand far enough
to the right and left to allow access and loosening of the two set-screws
using a small Phillips screw driver. Use the holes through the
right side of the metal frame to reach the set-screws with the screw
driver. It is not necessary to remove the set-screws. Only back them
out approximately 3/16 of an inch.
- Pull the inlet fitting tube
straight up and out.
- Insert the new inlet tube, with o-rings
in place, down through the guide and carefully press it into the heat
sink. Some rotating of the inlet tube may be necessary as it is guided
down.
- After seating the inlet tube, tighten the
set-screws. The tube should be free to rotate after turning the set-screws
into the grooves. Do not over tighten the set-screws.
- Wrap the Teflon tape pipe sealer
around the threads of the inlet fitting and reconnect the incoming water
line. 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.
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