Guide Specifications - Carrier 52S Architects And Engineers' Manual

GUIDE SPECIFICATIONS

PACKAGED TERMINAL COOLING UNIT
WITH HEAT PUMP OR ELECTRIC HEATING
HVAC Guide Specifications
Size Range: Cooling:
Heating:
Carrier Model Numbers: 52SC Cooling
Part 1 — General
1.01 SYSTEM DESCRIPTION
Single piece, thru-the-wall electrically controlled unit
using hermetic rotary compressor for cooling and heat
pump or electric resistance heat, as shown on the con-
tract drawings.
1.02 QUALITY ASSURANCE
Unit shall be rated in accordance with ARI Standard
310/380-93 and certified by UL and UL, Canada.
1.03 DELIVERY, STORAGE, AND HANDLING
Unit shall be stored and handled per manufacturer's
recommendations.
Part 2 — Products
2.01 EQUIPMENT
A. General:
Factory-assembled, single-piece heating and/or
cooling unit. Contained within the unit enclosure
shall be compressor, coils, fans and fan motor, heat-
ing means, controls, all wiring and piping, and a
full refrigerant charge (R-22).
B. Front Panel (supplied with unit) and Wall Sleeve:
Wall sleeve and front panel shall be of plastic mate-
rial. Front panel to have louvers in front surface.
C. Fans and Motor:
1. Evaporator (indoor) fan shall be a single-inlet
squirrel cage blower with a corrosion-resistant
finish, discharging air upwards. Fan shall be
dynamically balanced.
2. Condenser (outdoor) fan shall be a propeller
type with corrosion-resistant finish, discharg-
ing air out the rear of the unit, and shall be
dynamically balanced.
3. Motor shall be totally enclosed, permanently
lubricated, and multiple speed.
D. Compressor:
The compressor shall be fully hermetic with inter-
nal and external vibration isolation.
E. Coils:
The coils shall have aluminum plate fins mechani-
cally bonded to seamless copper tubes internally
enhanced (grooved) with all joints brazed.
7,100 to 13,700 Btuh
6,100 to 11,000 Btuh Heat Pump
6,400 to 17,000 Btuh Electric
Only Unit
52SE Unit with
Electric Heat
52SQ Heat Pump
F. Refrigerant Components:
All piping, compressor, and expansion devices shall
be included.
G. Controls and Safeties:
1. Controls shall consist of pushbutton OFF/
FAN/ HEAT/COOL adjustable thermostat with
upper and lower limits, VENT OPEN/CLOSE,
and FAN CYCLE switches. Additional con-
trols for heat pumps include outdoor coil
defrost thermostat.
2. Safeties shall consist of automatic reset over-
temperature and overcurrent protection for
compressor, inherent, automatic reset over-
temperature protection for fan motor; two
overtemperature protectors for heater.
H. Operating Characteristics:
Unit shall be capable of starting and running at
115 F ambient outdoor temperature per maximum
load criteria of ARI Standard 310. Compressor with
standard controls shall be capable of operation
down to 25 F ambient outdoor temperature for heat
pump and 55 F ambient outdoor temperature for
cooling.
I. Electrical Requirements:
230/208-Volt: Shall be prewired with one plug to
use with appropriate wall receptacle as specified on
unit nameplate.
265-Volt: Shall be hard-wired or cord-connected
through subbase.
J. Filter:
1. One-piece washable type that filters supply air.
2. One-piece washable type filter in vent door fil-
ters outdoor air.
K. Corrosion Protection (CP):
Corrosion Protection (CP), for coastal or corrosive
environments, prolongs the life of the product. Min-
imum requirements are:
1. All outdoor-exposed sheet metal parts shall be
coated with a polyester thermostat powder coat
paint.
2. Compressor and outdoor fan motor finish shall
be capable of withstanding 500 hours of salt
spray testing per ASTM B-117.
3. Compressor mounting screws shall be Serma-
gard coated.
4. Outdoor coil fin stock shall be coated and able
to withstand 1000 hours of salt spray testing
per ASTM B-117.
5. Outdoor coil tube sheets must be made of 316L
stainless steel.
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