Installation Guide

14
TABLE 2: APPROX. SETTING TIME FOR 2-1/2” (63.5mm)
TO 4” (102mm) PIPE JOINTS
MOVEMENT
OF JOINT
COMPLETE
SET
90°F (32.2°C) TO 150°F (65.6°C) 3/4HR. 8 HRS.
50°F (10°C) TO 90°F (32.2°C) 1 HR. 15 HRS.
0°F (-17.77°C) TO 50°F (10°C) 1-1/3 HR. 18 HRS.
WATER PIPING
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated to
a temperature which will satisfy space heating, clothes washing,
dish washing, cleaning and other sanitizing needs can scald and
permanently injure you upon contact. Some people are more likely
to be permanently injured by hot water than others. These include
the elderly, children, the infi rm, or physically/mentally handicapped.
If anyone using hot water in your home fi ts into one of these groups
or if there is a local code or state law requiring a certain temperature
water at the hot water tap, then you must take special precautions. In
addition to using the lowest possible temperature setting that satisfi es
your hot water needs, a means such as a mixing valve should be used
at the hot water taps used by these people or at the water heater.
See Figure 2. Valves for reducing point of use temperature by mixing
cold and hot water are also available. Consult a Qualifi ed Installer or
Service Agency. Follow manufacturer’s instructions for installation
of the valves. Before changing the factory setting on the thermostat,
read the “Temperature Regulation” section in this manual.
This water heater shall not be connected to any heating systems or
component(s) used with a non-potable water heating appliance.
Toxic chemicals, such as those used for boiler treatment shall not
be introduced into this system.
As water is heated, it expands (thermal expansion). In a closed
system, the volume of water will grow. As the volume of water grows,
there will be a corresponding increase in water pressure due to
thermal expansion. Thermal expansion can cause premature tank
failure (leakage). This type of failure is not covered under the limited
warranty. Thermal expansion can also cause intermittent temperature-
pressure relief valve operation: water discharged from the valve due
to excessive pressure build up. The temperature-pressure relief valve
is not intended for the constant relief of thermal expansion. This
condition is not covered under the limited warranty.
A properly-sized thermal expansion tank should be installed on all
closed systems to control the harmful effects of thermal expansion.
Contact a plumbing service agency or your retail supplier regarding
the installation of a thermal expansion tank.
Also, the water supply pressure should not exceed 80 PSI (551.58 kPa).
If this occurs, a pressure reducing valve with a bypass should be installed
in the cold water inlet line. This should be placed on the supply to the entire
house in order to maintain equal hot and cold water pressures.
NOTE: To protect against untimely corrosion of hot and cold
water fi ttings, it is strongly recommended that dielectric unions
or couplings be installed on this water heater when connected
to copper pipe.
Figure 23 shows the typical attachment of the water piping to the
water heater. The water heater is equipped with 3/4 inch NPT water
connections.
FIGURE 23.