Specification Sheet

23
GUIDE SPECIFICATIONS
HORIZONTAL DISCHARGE OUTDOOR UNITS
Size Range: 3/4 to 3 Ton Nominal Cooling and Heating Capacity
Carrier Model Number: 38MA*R
PART 1 − GENERAL
1.01 System Description
A. Outdoor air−cooled split system compressor sections suitable
for on−the−ground, rooftop, wall hung or balcony mounting.
Units consist of a rotary compressor, an air−cooled coil,
propeller−type draw−through outdoor fan, reversing valve
(HP), accumulator (HP units), metering device(s), and a control
box. Units discharge air horizontally as shown on the contract
drawings. Units function as the outdoor component of an
air−to−air heat pump system.
B. Units are to be used in a refrigeration circuit matched to
ductless heat pump fan coil units.
1.02 Agency Listings
A. Unit construction complies with ANSI/ASHRAE 15, latest
revision, and with the NEC.
B. Units are evaluated in accordance with UL standard 1995.
C. Units are listed in the CEC directory.
D. Unit cabinet is capable of withstanding 500−hour salt spray test
per Federal Test Standard No. 141 (method 6061).
E. Air−cooled condenser coils are leak tested at 550 psig.
1.03 Delivery, Storage, And Handling
Units are shipped in one piece and are stored and handled per unit
manufacturer’s recommendations.
1.04 Warranty (For Inclusion By Specifying Engineer)
PART 2 − PRODUCTS
2.01 Equipment
A. General:
Factory assembled, single piece, air−cooled outdoor unit.
Contained within the unit enclosure is all the factory wiring,
piping, controls, and the compressor.
B. Unit Cabinet:
1. Unit cabinet is constructed of galvanized steel, bonderized
and coated with a baked−enamel finish on the inside and
outside.
2. Unit access panels is removable with minimal screws and
provides full access to the compressor, fan, and control
components.
3. The outdoor compartment is isolated and has an acoustic
lining to assure quiet operation.
C. Fans:
1. Outdoor fans are the direct drive propeller type, and
discharges air horizontally. Fans draw air through the
outdoor coil.
2. Outdoor fan motors are totally enclosed, single phase motors
with class E insulation and permanently lubricated ball
bearings. Motor shall be protected by internal thermal overload
protection.
3. The shaft has inherent corrosion resistance.
4. Fan blades are non−metallic and statically and dynamically
balanced.
5. Outdoor fan openings are equipped with a PVC metal/mesh
coated protection grille over the fan.
D. Compressor:
1. Compressor is the fully hermetic rotary type.
2. Compressor is equipped with an oil system, operating oil
charge, and a motor.
3. Motor is NEMA rated class E, suitable for operation in a
refrigerant atmosphere.
4. Compressor assembly is installed on rubber vibration
isolators.
E. Outdoor Coil:
The coil is constructed of aluminum blue hydrophilic pre−coated
fins mechanically bonded to seamless copper tubes, which are
cleaned, dehydrated, and sealed.
F. Refrigeration Components:
Refrigerant circuit components include a brass external liquid line
service valve with service gage port connections, a suction line
service valve with a service gage connection port, service gage port
connections on compressor suction and discharge lines with Schrader
type fittings with brass caps, accumulator, reversing valve.
G. Controls and Safeties:
Operating controls and safeties are factory selected, assembled, and
tested. The minimum control functions include the following:
1. Controls:
a. A time delay control sequence is provided standard through
the fan coil board
b. Automatic outdoor fan motor protection.
2. Safeties:
a. System diagnostics
b. Compressor motor current and temperature overload
protection
c. Outdoor fan failure protection.
H. Electrical Requirements:
1. Unit operates on single−phase, 60 Hz power at 115V for
unit sizes 09−12 and 208/230V for unit sizes 09, 12, 18, 24,
30 and 36, as specified.
2. Unit electrical power has a single point connection.
3. Unit Control voltage to the indoor fan coil is 0−15V DC.
4. All power and control wiring must be installed per NEC
and all local electrical codes.
5. The unit has high and low voltage terminal block
connections.