the installation drawing (Figure 10). If the indoor installation
area is subject to freezing temperatures, the water piping
must be protected by insulation. Water supply pressure
should not exceed 550 kPa (80psi). If this occurs a pressure
reducing valve and/or an expansion tank may be required.
The pressure reducing valve should be placed on the sup-
ply to the entire house in order to maintain equal hot and
cold water pressures.
Important:
Heat must not be applied to the water fittings on
the heater as they may contain nonmetallic parts. If solder
connections are used, solder the pipe to the adapter before
attaching the adapter to the hot and cold water fittings.
Install the water piping and fittings as shown in Figure 10.
Connect the cold water supply to the fitting (3/4” NPT)
marked “COLD” (or “C”). Connect the hot water supply to
the fitting (3/4” NPT) marked “HOT” (or “H”).
Important:
Always use a good grade of joint compound,
approved for use with potable water systems, and be certain
that all fittings are drawn up tight.
Important:
Some models may contain energy saving heat
traps to prevent the circulation of hot water within the pipes.
Do not remove, modify or tamper with the heat traps or any
inserts within the heat traps.
Union Connections
If a union connection is required we recommend raising the
union above the draft-hood as illustrated in Figure 10. If gal-
vanized piping is used, we recommend a galvanized nipple
extension or a galvanized coupler with a pipe nipple to raise
the union above the draft-hood. Same procedure applies if
using copper.
Please note the following:
DO NOT
install this water heater with iron piping. The sys-
tem should be installed only with new piping that is suitable
for potable (drinkable) water such as copper, CPVC or poly-
butylene. DO NOT use PVC water piping.
DO NOT
use any pumps, valves or fittings that are not com-
patible with potable water.
DO NOT
use valves that may cause excessive restriction to
water flow. Use full flow ball or gate valves only.
DO NOT
use any lead based solder in potable water lines.
Use appropriate tin-antimony or other equivalent material.
DO NOT
use with piping that has been treated with chro-
mates, boiler seal or other chemicals.
DO NOT
add any chemicals to the system piping that will
contaminate the potable water supply.
Mixing Valves
Hot water can scald:
Water heaters are intended to pro-
duce hot water. Water heated to a temperature that will sat-
isfy space heating, clothes washing, dish washing, and
other sanitizing needs can scald and permanently injure you
upon contact. Some people are more likely to be perma-
nently injured by hot water than others. These include the
elderly, children, the infirm, and physically/mentally handi-
capped.
If any one using the hot water fits into one of these groups
or if there is a provincial, state or local code requiring a cer-
tain temperature water at the hot water faucet, then you
must take special precautions. In addition to using the low-
est possible temperature setting that will satisfy your hot-
water needs, a means such as a mixing valve, should be
used at the hot-water faucets or at the water heater. Mixing
valves are available at plumbing supply or hardware stores.
Follow manufacturer’s instructions for installation of these
valves. Before changing the factory settings on the thermo-
stat, read the “Temperature Regulation” section in this man-
ual.
Closed System/Thermal Expansion
Periodic discharge from the temperature and pressure relief
valve may be due to thermal expansion in a closed water
supply system. The water utility supply meter may contain a
Figure 11
Typical Tempering Valve Installation
TEMPERING VALVE
(SET TO 49°C (120°F))
FOLLOW THE TEMPERING
VALVE MANUFACTURER'S
INSTRUCTIONS
COLD WATER INLET
PIPE
INSULATION
HOT WATER
OUTLET
TEMPERED
WATER TO
FIXTURE
WARNING
Never allow small children to use a hot-water
faucet, or to draw their own bath water.
Never leave a child or impaired person unat-
tended in a bathtub or shower. Scald burns
can result.
– 11 –
