Carrier 52M Performance Series Product Data

13
HEAT PUMPS PAY THEIR
OWN WAY
Heat pump models are available at a nominal
additional cost. In many locales, the payback is
realized in just a few months. Cost and payback
details are provided on the next page.
SPECIAL FEATURES
Two- Stage Thermostat:
The indoor thermostat senses the i ndoor temperature
and aut o m at ical l y turn s o n t h e elect ri c heat to warm
the room quickly. After the desired temperature
conditions have been satisfied, the thermostat
automatically switches to heat pump mode. If
compressorfailureoccurs,thethermostatwillprovide
backu p el ect ri c heat aut om at i cal l y.
Outdoor Thermostat:
During the heating cycle, the outdoor thermostat
senses outdoor coil temperature. It switches t he unit
to electric heat mode when the outdoor coil
temperature is 28_F or below for one minute. The
thermostat switches the unit back to heat pump mode
when the outdoor coil temperature rises above 40_F
for t en minutes, which is enough to provide heat to
meet demand. The entire operation is completely
automatic.
Reversing Valve:
The reversing valve provides quiet refrigerant flow
after t he unit shuts off. The valve controls the
direction of refrigerant flow for both heating and
cooling functions and remains energized as long as
the controls are in the heat position. When the
cooling controls are activated, the valve automatically
reverses to the cooling position.
Manual Compressor Override Configuration:
This configuration dip switch completely l ocks out
the compressor. Note that the compressor and heater
do not operate at the same time, thus conserving
energy.
HOW THE HEAT PUMP WORKS
A07553
In Hot Weather:
Carrier ’s PTAC units provide indoor comfort in the
same manner as conventional air conditioners,
removing heat and humidity from indoor air. The heat
and humidity is released to the outdoors. Carrier’s
high efficiency design saves energy and reduces
cooling costs.
A07553
In Cool Weather:
When the outdoor coil temperature is above 28_F, the
heat pump draws heat from outdoor air and uses it to
heat indoor air. Since heat is transferred and not
prod uced , Carri er’s heat pump us es less el ect ri ci t y
and red uces energy cos t s s i g ni fi can t l y.
A07554
In Sub- Freezing Weather:
When the outdoor coil temperature falls below 28_F
for one minute, the unit automatically switches on a
bui l t--in elect ri c heat er. Th e com p res s or s t op s and the
indoor fan circulates warm air produced by the heater.
When the outdoor coil temperature rises above 40_F
for ten minutes, heat pump operation resumes
automatically.
52M

Carrier 52M Performance Series Specifications

General

Brand	Carrier
Model	52M Performance Series
Category	Air Conditioner
Language	English