– 49 –
The heat pump will provide all heating requirements
for subsequent cycles unless one of the following
conditions occurs:
• The #1 dip switch has been placed in the I2R
(ALL ELECTRIC HEAT) position. When the dip
switch is placed in the up position, heat pump
operation will be locked out. Only electric
resistance heat will be available.
• A temperature differential of approximately
2°F is detected between the thermostat set
point and the room air temperature. If a
differential of approximately 2°F is detected,
due to thermostat adjustment or falling room
air temperature, the electric heaters will be
energized (heat pump off) until the thermostat
is satisfi ed. Once the thermostat has been
satisfi ed, the unit will automatically revert to
heat pump operation for subsequent cycles.
• If the outdoor temperature falls below 25°F, the
unit will automatically switch from heat pump
operation to resistance heat operation. A 7°F
hysteresis loop will be in effect; therefore, the
unit will operate in resistance heat mode until
an outdoor temperature of 32°F or higher is
detected.
Models without heat pumps meet heating
requirements with electric resistance heating coils.
The heat pipe is arranged in a saddlebag
confi guration around the indoor coil. The heat pipe
coils extend across the entire length of the indoor
coil and from top to bottom of the indoor coil.
There is a small gap between the heat pipe coils and
the evaporator coils. They do not touch one another,
as this would allow the transfer of heat between the
two surfaces. The heat pipe is not connected to the
refrigerant system of the unit. The refrigerant that
is in the heat pipe stays within the heat pipe tubing,
and the refrigerant within the refrigerating system
of the air conditioner stays within that system.
INDOOR
COIL
HEAT PIPE ASSY
71.5˚F
46˚F
54.6˚F
Heat Pipe (Dry Air)
-
2800 Series
A Heat Pipe is a simple device that can quickly
transfer heat from one point to another without the
need of energy input. A heat pipe is nothing more
then a refrigerant-fi lled coil. The coil consists of 3
separate refrigerant fi lled coils, each referred to as a
circuit of the heat pipe coil. Each circuit is fi lled with
approximately 4 oz. of R22.
