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GUIDE SPECIFICATIONS
INDOOR PACKAGED UNIT
HVAC GUIDE SPECIFICATIONS — SECTION 15787
SIZE RANGE: 2 TO 5 TONS, NOMINAL
BRYANT MODEL NUMBER: 502A
PART 1 — GENERAL
1.01 SYSTEM DESCRIPTION
Indoor mounted, electrically controlled packaged horizon-
tal cooling unit utilizing a hermetic type scroll compressor.
1.02 QUALITY ASSURANCE
A. Unit shall be certified in accordance with ARI Stand-
ard 210.
B. Unit shall be UL listed and carry a UL label.
C. Unit shall be CSA approved (except 3 ton, 3-phase units).
D. Unit shall be factory run-tested to ensure proper perfor-
mance prior to delivery.
1.03 DELIVERY, STORAGE, AND HANDLING
A. Unit shall be shipped completely assembled and ready to
operate.
B. Unit shall be shipped factory charged with refrigerant
R-22.
C. Unit shall be stored and handled in accordance with the
unit manufacturer’s instructions.
PART 2 — PRODUCTS
2.01 EQUIPMENT
A. General:
Factory assembled horizontal, single piece, air cooled,
indoor, ceiling plenum mounted electric cooling unit. Con-
tained within the unit enclosure shall be all factory wiring,
piping, controls, refrigerant charge (R-22), and special
features required prior to start-up.
B. Unit Cabinet:
1. Constructed of galvanized steel.
2. Interior shall be insulated with
1
/
2
-in. thick neoprene
coated fiberglass. Insulation shall be bonded to inte-
rior surfaces by sprayed water reduceable adhesive.
3. Equipped with 3 same side access panels and 2 bot-
tom hanging removable doors to facilitate ease of
maintenance. Side panels allow access to the control
box, refrigeration components, and condenser coil.
Control box shall be hinged allowing access to the
compressor and pressure switches. Bottom doors
shall allow access to and easy removal of the
condenser and evaporator motors and blower
assemblies.
4. Equipped with two
3
/
4
-in. threaded condensate drain
connections below the evaporator coil and one
3
/
4
-in.
threaded connection for condenser coil wash down.
Connections shall be factory plugged for field
removal.
5. Field splittable through the removal of 4 bolts and
extending refrigerant piping and wiring to allow
remote horizontal or vertical condenser mounting.
6. Unit shall have an integral hanging bracket requiring
only 4 threaded rods (8 if unit is split) run to the top
flange of the unit for hanging, eliminating need for
external hanger brackets.
7. Contains junction box for power connection and
opening for routing of control wiring.
C. Fans:
1. Evaporator:
a. Blower shall be of the forward-curved, centrifugal,
direct-drive type or belt drive (4 and 5 tons only).
b. Motor shall have permanently lubricated
bearings.
c. Unit sizes 048, 060 shall be available with an
optional 1.5 hp fan motor.
2. Condenser:
a. Blower shall be of the forward-curved, centrifugal,
direct-driven type (024 only), or belt drive
(036,048,060).
b. Motor shall have permanently lubricated
bearings.
D. Compressor:
1. Fully hermetic scroll type.
2. Mounted on suitable spring vibration isolators.
3. Equipped with internal line break protection.
E. Coils:
Evaporator and condenser coils shall be of non-ferrous
construction with aluminum fins mechanically bonded to
seamless copper tubes with all joints brazed.
F. Refrigerant Components:
Refrigerant components shall include:
1. Capillary tube feed system.
2. Refrigerant filter-drier.
G. Filter Section:
Filter section shall consist of factory-installed, permanent,
cleanable air filter, removable from the same side as the
access panels without the use of tools.
H. Controls and Safeties:
Control system shall include a high-pressure switch, a
low-pressure switch, and a compressor lockout feature
which upon tripping of any safety device shall prevent
compressor from restarting until reset at the thermostat
(on all 3-phase units and 036 single-phase units only).
I. Operating characteristics:
1. Unit shall operate using refrigerant R-22.
2. Unit shall be designed for indoor suspended horizon-
tal mounting and operation.
J. Electrical Requirements
Unit shall have single point power connection to leads in
terminal box.
K. Special Features:
Certain standard features are not applicable when the
features designated by * are specified. For assistance in
amending the specifications, your local Bryant Sales
Office should be contacted.
* 1. Electric Heat Module:
a. Provides encased heater elements that shall
attach directly to the base unit discharge.
b. Shall have bottom access.
c. UL listed.
2. Thermostat Assembly:
Provides cooling and fan control. Standard subbase
shall include ‘‘Compressor malfunction light’’
designed to illuminate if compressor lockout is
activated.