15
GUIDE SPECIFICATIONS
HORIZONTAL DISCHARGE DUCTLESS OUTDOOR UNITS
Size Range: 3/4 to 1 Ton Nominal Cooling and Heating Capacity
Carrier Model Number: 38MAQ
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 shall 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 control
box. Units shall discharge air horizontally as shown on the
contract drawings. Units shall function as the outdoor
component of an air--to--air cooling only, or heat pump system.
B. Units shall be used in a refrigeration circuit matched to ductless
cooling only or heat pump fan coil units.
1.02 Agency Listings
A. Unit construction shall comply with ANSI/ASHRAE 15, latest
revision, and with the NEC.
B. Units shall be evaluated in accordance with UL standard 1995.
C. Units shall be listed in the CEC directory.
D. Unit cabinet shall be capable of withstanding 500--hour salt
spray test per Federal Test Standard No. 141 (method 6061).
E. Air--cooled condenser coils shall be leak tested at 550 psig.
1.03 Delivery, Storage, And Handling
Units shall be shipped in one piece and shall be 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 shall be all factory wiring,
piping, controls, and the compressor.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of galvanized steel,
bonderized and coated with a baked--enamel finish on
inside and outside.
2. Unit access panels shall be removable with minimal screws
and shall provide full access to the compressor, fan, and
control components.
3. Outdoor compartment shall be isolated and have an acoustic
lining to assure quiet operation.
C. Fans:
1. Outdoor fans shall be direct--drive propeller type, and shall
discharge air horizontally. Fans shall draw air through the
outdoor coil.
2. Outdoor fan motors shall be totally enclosed, single phase
motors with class E insulation and permanently lubricated
ball bearings. Motor shall be protected by internal thermal
overload protection.
3. Shaft shall have inherent corrosion resistance.
4. Fan blades shall be non metallic and shall be statically and
dynamically balanced.
5. Outdoor fan openings shall be equipped with PVC
metal/mesh coated protection grille over fan.
D. Compressor:
1. Compressor shall be fully hermetic rotary type.
2. Compressor shall be equipped with oil system, operating oil
charge, and motor. Internal overloads shall protect the
compressor from over--temperature and over--current.
3. Motor shall be NEMA rated class E, suitable for operation
in a refrigerant atmosphere.
4. Compressor assembly shall be installed on rubber vibration
isolators.
5. Compressors shall be single phase.
E. Outdoor Coil:
Coil shall be constructed of aluminum fins and specially blue
hydrophilic pre--coated for enhanced wet--ability mechanically
bonded to seamless copper tubes, which are cleaned, dehydrated,
and sealed.
F. Refrigeration Components:
Refrigerant circuit components shall include brass external liquid
line service valve with service gage port connections, suction line
service valve with 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 shall be factory selected, assembled,
and tested. The minimum control functions shall 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 shall operate on single--phase, 60 Hz power at
208--230v as specified.
2. Unit electrical power shall be a single point connection.
3. Unit Control voltage to the indoor fan coil shall be 0--15V
DC.
4. All power and control wiring must be installed per NEC
and all local electrical codes.
5. Unit shall have high and low--voltage terminal block
connections.
