Installation and Operation Manual -
HRG18xxS1P
508133M01
Page 21 of 23
Issue 2106
defrost cycle to satisfy a heating demand; however,
the unit will run to normal operation at the conclusion
of the defrost cycle.
In case of extended power outage...
If the outdoor temperature is below 50°F and power to your
outdoor unit has been interrupted for one hour or longer,
observe the following when restoring power to your heat
pump system.
• Set the room thermostat selector to the “Emergency
Heat” setting to obtain temporary heat for a minimum
of 6 hours. This will allow system refrigerant pressures
and temperatures enough time to return to a stabilized
condition.
• In Emergency Heat mode, all heating demand is
satisfied by auxiliary heat; heat pump operation is
locked out. After a 6 hour “warm-up” period, the
thermostat can then be switched to the “Heat” setting
and normal heat pump operation may resume.
Thermostat Operation
The wall-mounted thermostat controls your heat pump.
The thermostat is available in various configurations from
different manufacturers. The information below is typical for
most thermostats. Ask your dealer for specific information
regarding the model of thermostat installed.
Fan Switch
In AUTO or INT (intermittent ) mode, the blower operates
only when the thermostat calls for heating or cooling. This
mode is generally preferred when humidity control is a
priority.
The ON or CONT mode provides continuous indoor
blower operation, regardless of whether the compressor or
auxiliary heat are operating. This mode is required when
constant air circulation or filtering is desired.
On models without a fan selection switch, the fan will cycle
with the outdoor unit.
System Switch
Set the system switch for heating, cooling or auto
operation. The auto mode allows the heat pump to
automatically switch from heating mode to cooling mode to
maintain predetermined comfort settings. Many heat pump
thermostats are also equipped with an emergency heat
mode which locks out heat pump operation and provides
temporary heat supplied by the auxiliary heat.
Indicating Light
Most heat pump thermostats have an amber light
which indicates when the heat pump is operating in the
emergency heat mode.
Temperature Indicator
The temperature indicator displays the actual room
temperature.
SHARP OBJECT HAZARD!
Condenser coils have sharp edges. Wear adequate
body protection on body extremities (e.g. gloves).
FAILURE TO FOLLOW THIS WARNING COULD
RESULT IN BODILY INJURY.
WARNING
Painted Surfaces
For maximum protection of the unit’s finish, a good grade
of automobile wax should be applied every year. In
geographical areas where water has a high concentration
of minerals (calcium, iron, sulfur, etc.), it is recommended
that lawn sprinklers not be allowed to spray the unit. In
such applications, the sprinklers should be directed away
from the unit. Failure to follow this precaution may result
in premature deterioration of the unit finish and metal
components.
In sea coast areas, special maintenance is required due
to the corrosive atmosphere provided by the high salt
concentration in ocean mists and the air. Periodic washing
of all exposed surfaces and coil will add life to your unit.
Please consult your installing dealer for proper procedures
in your geographic area.
Homeowner Information
ELECTRICAL SHOCK HAZARD!
Turn OFF electric power to unit before performing any
maintenance or removing panels or doors.
FAILURE TO DO SO COULD RESULT IN BODILY
INJURY OR DEATH.
WARNING
Heat Pump Operation
Your new heat pump has several characteristics that you
should be aware of:
• Heat pumps satisfy heating demand by delivering large
amounts of warm air into the living space. This is quite
different from gas-or oil-fired furnaces or an electric
furnace which deliver lower volumes of considerably
hotter air to heat the space.
• Do not be alarmed if you notice frost on the outdoor coil
in the winter months. Frost may develop on the outdoor
coil during the heating cycle when temperatures are
below 45°F. An electronic control activates a defrost
cycle lasting 5 to 15 minutes at preset intervals to clear
the outdoor coil of the frost.
• During the defrost cycle, you may notice steam rising
from the outdoor unit. This is a normal occurrence.
The thermostat may engage auxiliary heat during the
