Carrier 52M Performance Series Product Data page 37

E. Air Flow System:
For superior sound and comfort, the airflow
system shall consist
permanently lubricated fan motors. The outdoor
fan motor will be single speed, with a dynamically
balanced, corrosion resistant, polymer multiblade
axial flow design, with integrated slinger ring. The
indoor fan motor will be three speeds, with a
dynamically balanced, polymer, tangential blower
wheel, to assure uniform air distribution and
optimal sound. Both Fan Motors shall be of an
enclosed design to reduce the effects of moisture
and corrosion.
F. Compressor & Refrigerant:
The rotary- -type Compressor shall be fully
hermetic with internal and external vibration
isolation. The refrigeration system will be sealed
and contain a full refrigerant charge (R- -22).
G. Coils:
Condenser and evaporator coils to be constructed
of high- -efficiency copper tubing, necessary to
achieve EER and COP rating, as specified on the
chassis name plate.
H. Factory- -Installed Electric Heater:
The factory- -installed, open coil type, electric
heater is standard in heat/cool and heat pump
chassis. The electric heater shall contain both an
automatic reset and a one- -shot over temperature
protection device. The heating capacity of the
electric heater shall be as identified on the
Contract drawing
specifications.
I. Controls:
All standard models shall be equipped with
electronics, for added features and improved
reliability of the unit.
The chassis shall have an easy to operate, user
friendly, electronic display with simple to push,
large digital buttons. All will be easily accessible
and covered by a hinged door.
The mode selection control shall consist of OFF,
FAN ONLY, HEAT or COOL operations. There
will be 3 optional Fan Speed Options, LOW,
MED or HIGH. The temperature selection will be
controlled by color coded, simple to operate
warmer and cooler buttons. The upper and lower
setpoint temperature
configured.
All models shall have a configuration dipswitch,
easily accessible for the maintenance person,
optimal comfort settings, CONTINUOUS or
CYCLE fan mode in HEATING, CONTINUOUS
or CYCLE fan mode in COOLING, FREEZE
of two, direct- -drive
schedule and in the
limits, can be easily
GUARD enabled
THERMOSTAT
EMERGENCY HEAT (for heatpumps), and 4
optional SETPOINT LIMIT selections.
Fan cycle configuration switches, will allow
continuous fan operation for maximum comfort or
cycle operation for maximum energy savings.
Settings can be different for both heating and
cooling operations, for maximum comfort and
efficiency.
All standard models shall have Temperature
Limiting control, with four easy to configure
settings. Temperature limiting allows a room
temperature range to be set, to avoid extreme
temperature settings, to maximize energy savings.
Emergency Heat Switch (Heat Pump Models
Only) shall disable the compressor in heating
mode and only allow the use of electric heat
during heating cycles. The Emergency Heat switch
is active at all outdoor ambient temperatures.
All units shall be capable of interfacing to a wall
thermostat; have a blank out label to cover the
control panel for wall
and have a removable wall thermostat terminal
block, to simplify field wiring. No additional
field- -installed kits shall be required.
Wall thermostat interface shall provide two fan
speed selections to maximize comfort.
Compatible with 2 wire central desk control
systems.
Freeze Guard to automatically activate the electric
heater and indoor fan to warm the room, to
prevent damage from freezing temperatures.
Freeze guard will be active as long as there is
power supplied to the unit. Unit shall have the
ability to disable Freeze guard, if needed.
Unit shall have the option to display temperature
in _F or _C.
Unit will have memory; in case power is lost, unit
will return to all previous settings.
Unit will have a random compressor restart after a
power outage, to prevent power surges due to
many units turning on at the same time.
Room temperature sensing shall use a Solid state
thermostat control.
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or disabled, WALL
enabled or disabled,
thermostat applications;