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Operating Mode Descriptions
The operating modes can be changed by touching the desired
mode icon on the User Interface Module (see Figure 16.)
NOTE: All buttons on the User Interface are touch sensitive and
require only a light touch to actuate.
®
HyE3R4D
©
ELECTRIC
Hybrid Mode - This is the default, recommended
setting. Combining high energy efficiency with
reduced recovery time, this mode uses the heat
pump as the primary heating source. The heating
element wilt heat water if demand exceeds
a predetermined level so that the set point
temperature can be recovered more quickly.
Efficiency Mode - Is the most energy efficient
mode. This mode uses the heat pump to heat water
in the tank. The elements are not used unless the
ambient operating temperature is below 45°F or
above 109°F. Ifhot water demands are not met in
Efficiency Mode it may be necessary to switch to
Hybrid Mode.
Electric Mode - The water heater functions as a
conventional electric unit, relying totally on the
elements to heat the water in the tank. This mode
may be useful in winter to eliminate the output of
cold air from the unit.
Vacation Mode - The controller adjusts the water
temperature to approximately 60°F. This mode is
recommended when the water heater is not in use
for a tong period of time. This mode effectively
turns the controller temperature setting down to a
temperature that prevents the water in the water
heater from freezing while still conserving energy.
NOTE: To activate the Vacation Mode touch the
vacation button. To deactivate Vacation Mode
touch the vacation button. IMPORTANT: The
anode protecting the tank requires power to the
unit to operate. Do not shut off power to the unit
for extended periods of time. If power must be
turned off for an extended period of time, drain the
tank completely.
Lock - Holding this button for more than 3seconds
switches the lock mode on or off. When the User
Interface Module is locked a symbol and "Lock"
text will be visible on the display (see Figure 16).
°F/°C - The button switches the display to show
the set temperature in Fahrenheit or Celsius.
Operational Mode Buttons
Element
Functioning
Icon
Heat Pump
Functioning
Icon
Water
Temperature
I _ Water Heater
I._ - Mode/Status
Indicator
,,Water Heater
Efficiency Status
Icon
LCD Control
Temperature
Up (Increase) (Decrease)
Button Button
Fahrenheit/Celsius
Display Panel
Temperature Display Lock Button
Button
Power Button: On - Green
Standby - Red
FIGURE 16.
Temperature-Pressure Relief Valve Operation
The temperature-pressure relief valve must be manually operated
at least once a year.
• Burn hazard
• Hotwater discharge.
• Keep hands clear of drain
valve discharge.
The temperature-pressure relief valve must be manually operated
at least once a year. Caution should be taken to ensure that
(1) no one is in front of or around the outlet of the temperature-
pressure relief valve discharge line, and (2) the water manually
discharged wilt not cause any property damage or bodily injury.
The water may be extremely hot.
TEMPERATURE-PRESSURE
DISCHARGE PIPE
FIGURE 17.
17