Page 215 - 12558 Drexler Builder Binder.pdf

INSTALLATION

Step 6: system (or any other pre-hea ng
system), always install a Thermosta c IF YOU HAVE COPPER
Install shuto and Mixing Valve or other temperature PIPES:

tempering valves limi ng device in the inlet water supply If your home has copper water
line to limit water supply inlet pipes, you can solder the water
1 If one is not already installed, temperature to 120°F. Solar water pipe connec ons or use compres-
install a manual shuto valve
hea ng systems can supply water with

in the cold water line that temperatures exceeding 170°F and sion  ngs which don’t require

supplies the water heater. Install the may result in water heater soldering. Compression  ngs
shuto valve near the water heater so malfunc on. are easier to install than soldering
that it is readily accessible. Only use pipe. Check with local plumbing
valves that are compa ble with WARNING! Hot water provided o cials to determine what types

potable water. Use only full-ow ball by solar hea ng systems can cause of pipe materials are suitable for
or gate valves. Other types of valves severe burns instantly, resul ng in your loca on. Do not use lead-
may cause excessive restric on to the severe injury or death (page 4). based solder.

water ow.
Step 7:
Install a Thermosta c Mixing
2 Valve at each point-of-use 1 Connect the water
supply
(for example, kitchen sink,
INSTALLATION Consult the valve manufacturer’s Determine the type of water pipes in NOTICE: Do not solder pipes while
bathroom sink, bath, shower).
your home. Most homes use copper

instruc ons or a qualied person.
water pipes, but some use CPVC or
cross-linked polyethylene (PEX). Use
they are a ached to the water

 ngs appropriate for the type of pipe
in your home. Do not use iron or PVC
and outlet connec ons contain
pipe – they are not suitable for potable heater. The water heater’s inlet
non-metallic parts which could be
water. damaged. The proper way to con-
nect the water heater to copper
Connect the cold water water pipes is as follows:
2 supply using 3/4 inch

Na onal Pipe Thread “NPT” • Solder a short length of pipe
Figure 14 - Install Thermostatic Mixing to the cold water inlet nipple. (about a foot or so) to a thread-
Valves at each point where hot water will For ease of removing the water heater ed adapter using only 95/5 n-
be used.
for service or replacement, con- an mony or equivalent solder.
WARNING! Even if the water nect the water pipes with a coupling A ach the threaded adapters to
heater’s thermostat(s) are set to a called a union. We recommend using the water heater’s connec ons
rela vely low temperature, hot water (using Teon® tape or pipe joint

can scald. Install Thermosta c Mixing a dielectric-type union (available at compound). Connect the home’s

Valves at each point-of-use to reduce your local plumbing supplier ). Dielec- water pipes by soldering, keep-
the risk of scalding. (page 4.) tric unions can help prevent corro-
sion caused by ny electric currents ing the connec ons at the water
common in copper water pipes and heater cool with wet rags.
For water heaters that are fed
3 by a solar water hea ng can help extend the life of the water
heater.

12 • Residen al Electric Water Heater Use and Care Guide