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clearances are observed. Do
not store any items underneath
the water heater, and do not
store flammable liquids or other
flammable materials near the
water heater. This is important
for safety and future service. See
"Clearances" on page 11.
•
Do not install your water heater
underneath condensate lines.
•
A drain pan, or other means of
protection against water damage,
is recommended to be installed
under the water heater in case of
leaks. In addition, you may install
an active water leak detector with
a shutoff valve which can turn off
the water supply in the event of
a leak. The manufacturer is not
responsible for damage due to
water leaks.
Mount Your
2
Water Heater
1. Unpack the heater from the
shipping carton, but do not cut
the shipping carton with a sharp
instrument.
2. Stand the unit upright and
remove the plastic wrap.
3. Remove the screws that secure
the protective cover.
4. Remove the cover. If your water
heater has a user interface display
(UIM) , unplug its ribbon cable
from the control board in the
water heater. (A UIM is shown in
Figure 7, page 16.)
NOTICE: Be sure to remember
where to plug it back in later.
When the me comes to plug the
connector back into the control
board, it must be oriented cor-
rectly. We recommend marking
the connector and board with a
12
•
Electric Tankless Water Heater
marker. You will then be able to
align the marks later. See also
Figure 5, page 14.
5. If you have a point-of-use model,
locate the four mounting holes
in the back plate. (If you have
a two- or four-chamber model,
there are two mounting tabs on
each side of your water heater.)
6.
Two- or four-chamber water
heaters only:
Apply one standoff bumper to
each corner on the back of the
water heater. Standoff s are
provided. These standoff s must
be installed so the water heater
can vent properly. See Figure 1,
page 11.
7. Determine the mounting location
on the wall, then verify your
clearances. (See "Clearances" on
page 11.)
8. Position the unit against the wall.
Make sure that the unit is level.
NOTICE: Two-chamber and
four-chamber models must
be oriented with the inlet and
outlet facing upward. However,
point-of-use (POU) models may
be oriented horizontally as
described in Figure 3. To mount
a POU water heater horizontally,
follow the instructions on page
34.
9. Secure the water heater to the
wall or other suitable structure
with screws, bolts, or anchors
as appropriate. Ensure that the
mounting surface and fasteners
will support the weight of the
water heater. (You will reinstall
the water heater's protective
cover later.)
Figure 3.
water heater:
Horizontal
Connect the
3
Water Lines
NOTICE:
•
DO NOT apply heat to the water
lines, nipples, or any fitting on the
water heater. Heat from soldering
may damage the heat exchanger.
•
Thread sealing tape (plumber's
tape) is the only sealer that may
be used on the threads of the
inlet and outlet fittings. DO
NOT use pipe dope or PVC/CPVC
primer and glue on the threads
of the inlet and outlet fittings.
Exposure to these compounds
will damage the nipples, causing
leaks.
•
Use two wrenches when attaching
the hot and cold water lines to
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