Watter Saver HPWH500AAOC Installation, Operation And Maintanance Manual - page 10
Made In Rome, NY, USA
Watter$aver Heat Pump Water Heater
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WATER HEATER OPERATION
1. When there is a demand for hot water, cold water (from
the water supply), enters the tank, travels down the dip tube,
and is delivered to the bottom of the tank.
2. The lower temperature sensor reacts to the decreased
tank temperature and energizes the heat pump.
3. The heat pump will continue to operate until the water
temperature reaches the thermostat setting.
IMPORTANT: When the heat pump is running, the unit
will emit sounds similar to a refrigerator or dehumidi-
fier.
4. If the demand for hot water is greater than the recovery
rate of the heat pump, the upper temperature sensor will
react to the decreased upper tank temperature, turn off the
heat pump and energize the upper electric resistance ele-
ment. The mode of operation is indicated by the LED indica-
tors.
IMPORTANT: In the event of heat pump system failure
or extreme ambient (hot or cold) conditions, the red
LED will glow. Refer to the “Troubleshooting Guide” in
this manual for more information.
WATER TEMPERATURE REGULATION
The thermostat is adjusted to a temperature setting of 120° F
(48.9° C) or lower when it is shipped from the factory. Water
temperature can be regulated by adjusting the thermostat to
the preferred setting as shown in Figure 7.
The preferred starting point is 120° F (48.9° C). There is
a hot water scald potential if the thermostat is set too
high.
DANGER
Adjusting the thermostat past the “MEDIUM” setting
on the dial will increase the risk of scald injury.
START-UP AND OPERATION
WARNING
DO NOT attempt to operate or repair this water heater
if the thermostat or surrounding insulation has been
exposed to water in any way. Call a qualified service
technician to inspect the unit and immediately replace
any thermostat or insulation that has been exposed
to water. Water heaters subjected to flood condi-
tions or thermostats that have been submerged
in water require replacement of the entire water
heater.
EMERGENCY SHUT-OFF
A high temperature cutout switch on the Watter$aver
will automatically shut the unit off in the event that wa-
ter temperature exceeds 180° F (82.2° C). The switch
can be reset by firmly pushing the red reset button
located behind the thermostat panel on the front of the
unit.
IMPORTANT: The water temperature must be
below 180°F (82.2° C) in order to reset the unit.
IMPORTANT: Be sure the water tank is completely
filled before applying electrical power to the unit.
1. To ensure the unit is completely filled, open all hot wa-
ter faucets to allow air to escape from the piping. Then
close the faucets, turn on the power supply, and rotate the
temperature selector dial to the desired setting.
2. The upper electric resistance element (represented by
a green LED located inside the front grille of the Watter$aver
shroud) will turn on after a brief delay and turn off when the
upper temperature sensor is satisfied.
3. When the green LED turns off, the yellow LED will glow
and the compressor and fans will energize. The heat pump
will operate until the lower temperature sensor is satis-
fied.
IMPORTANT: There will be a brief time delay between
compressor start-up and when the fans begin to run.
4. When the heat pump stops running, the LEDs will stop
glowing. At this point, the water has reached the set tem-
perature.
QUICK REFERENCE- The LED indicators inside the
front grille of the Watter$aver shroud represent:
Green – Upper electric resistance element
Yellow – Compressor
Red – Lower electric resistance element
NOTE: Temperature settings beyond the black indicator will re-
sult in decreased efficiency, due to increased operation in elec-
tric resistance mode.
LOW
105° F
MED
130° F
HIGH
160° F
Figure 7
Approximate Thermostat Settings