Bryant 502A User Manual
HORIZONTAL INDOOR
SINGLE PACKAGE
COOLING UNITS
Model 502A
CeilingPAC
2 to 5 Tons
Single Package Cooling Units Featuring:
• compact design
• flexibility
• easy maintenance
• high quality and reliability
• quiet and efficient scroll compressor technology
FEATURES/BENEFITS
All in one package — high cooling efficiency, installation convenience, ease of accessibility for time-saving maintenance.
SPACE AND COST-SAVING DESIGN —
cifically designed to provide the building owner with behind the
scenes cooling, because it installs inside the ceiling. That’s
why we call it the Bryant Ceiling
and low silhouette enable it to fit easily and securely above the
conditioned space. Single package construction makes it easy
to install with minimal time and cost.
APPLICATION FLEXIBILITY —
cations, the unit can also be installed as a split system with the
condenser section mounted horizontally. Centrifugal fans permit ducting of both evaporator and condenser air.
QUIET OPERATION —
extra comfort of quiet operation. Bryant engineers met the
Commercial end users appreciate the
PA C
If desired for par ticular appli-
Model 502A is spe-
unit. The compact design
challenge by specifying heavy insulation, vibration-resistant
construction and operating components that function at low
noise levels, all of which keep system sound at a minimum
level.
EASY MAINTENANCE —
502A unit rates high in accessibility. Indoor location is ideal for
the maintenance technician, and five access panels, easily
removed, provide quick and convenient access to all components when needed. As an added plus, all required service/
maintenance access can be from one side allowing the unit to
be located against a wall or ceiling plenum obstruction, an
obvious space-saving idea.
BRYANT QUALITY AND RELIABILITY —
Ceiling
conscious commercial owner. Every unit is thoroughly run
tested at the factory and equipped with safety controls
designed to monitor and protect over the life of the unit.
SCROLL COMPRESSOR TECHNOLOGY —
sors are designed for high efficiency and are internally spring
mounted to minimize vibration noise. Each compressor is
hermetically sealed against contamination to promote longer
life and dependable operation. Scroll compressors are
standard on all units.
units have much to offer the cost- and efficiency-
PA C
When it comes to maintenance, the
The Bryant 502A
Scroll compres-
Form No. PDS 502A.24.1
TABLE OF CONTENTS
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . 2
ARI Capacity Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Field-Installed Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9,10
Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . .10-13
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,16
MODEL NUMBER NOMENCLATURE
502A P X 048 000 AB
Model Designation
502A Horizontal, Indoor
Single-Package Cooling Unit
Voltage
J — 208/230-1-60
P — 208/230-3-60
E — 460-3-60
T — 575-3-60
*Factory-Installed option, contact your local representative for specific information.
ARI* CAPACITY RATINGS
UNIT
502A
024
036
048
060
dB —
EER —
SEER —
TDR —
*Air-conditioning and Refrigeration Institute.
NOTES:
1. Ratings are at zero condenser air static and rated in accordance with ARI
Standard 210.
2. EER =
V-P H- Hz
208/230-1-60 2.6 25,000 800 — 10.80 11.00 78
208/230-1-60
460-3-60 9.0 — —
208/230-1-60
208/230-3-60 9.1 — —
460-3-60 9.1 — —
575-3-60 9.1 — —
208/230-1-60
208/230-3-60 8.55 — —
460-3-60 8.55 — —
575-3-60 8.55 — —
LEGEND
Decibels
Energy Efficiency Ratio
Seasonal Energy Efficiency Ratio
Time-Delay Relay
NET CAPACITY (Btuh)
TOTAL WATTS
TOTAL
kW
4.3 36,000 1200
5.5 49,500 1600
6.9 58,500 2000
NET TOTAL
COOLING CAP. (Btuh)
NOMINAL
CFM
Indoor Fan Motor
AA — Standard Motor
AB — 1.5 hp Optional Motor*
Electric Heaters
000 — No factory-installed electric heaters
Nominal Tons
024 — 2
036 — 3
048 — 4
060 — 5
X — Heat Not Installed
(field-installed electric heaters available)
EER SEER
—10.00 10.05
—10.20 10.40
—9.7510.05
SEER
(with TDR)
SOUND RATING
(dB)
82208/230-3-60 9.0 — —
82
82
2
UNIT 502A
SHIPPING WEIGHT (lb)*
OPERATING WEIGHT (lb)
Base Unit
REFRIGERANT TYPE
Operating Charge (lb)†
COMPRESSOR — TYPE
Quantity...Model
Oil (oz)
HPS Setting (psig)
Cutout
Reset
LPS Setting (psig)
Cutout
Reset
CONDENSATE DRAIN CONNECTION
Size (in.)...Type
CONDENSER FAN
Nominal Cfm
Maximum Rpm
Blower Size (in.)
Pulley Pitch Diameter (in.)
Blower
Motor (Variable)
Motor Hp
Motor Rpm
EVAPORATOR AIR FAN (Standard)
Nominal Cfm
Max Rpm
Blower Size (in.)
Motor Hp (Rpm)
Centrifugal — Direct Drive Centrifugal — Belt Drive
EVAPORATOR AIR FAN (Optional)
Nominal Cfm
Max Rpm
Blower Size (in.)
Motor Hp
Motor Rpm
Pulley Pitch Diameter (in.)
Blower
Motor (Variable)
CONDENSER COIL
Size (L x H) (in.)
Number of Rows...Fins/in.
EVAPORATOR COIL
Size (L x H) (in.)
Number of Rows...Fins/in.
INDOOR-AIR FILTERS
Number...Size (in.)
INTERCONNECTING TUBING SIZE (in.)**
Hot Gas
Liquid
HPS —
LPS —
*Shipping weights include base unit plus packaging.
†If components are to be split, additional refrigerant will be needed.
**Use Type L copper only.
LEGEND
High-Pressure Switch
Low-Pressure Switch
PHYSICAL DATA
024 036 048 060
560 590 690 700
450 480 580 590
5.4 5.5 8.0 7.6
(1)...ZR23 (1)...ZR34 (1)...ZR49 (1)...ZR57
24 42 48 54
1350 1350 2250 2450
None 5.0 6.0 6.0
None 2.4-3.4 1.9-2.9 2.4-3.4
1
/
2
825 1725 1725 1725
800 1200 1600 2000
1100 1150 1050
10 x 5 10 x 6 10 x 6
1
/6 (850)
40 x 15 40 x 16 40 x 22
4...13.6 4...17 4...13.6
34 x 15 34 x 16 34 x 22
4...14.4 4...15 4...14.4
1
/
2
3
/
8
1100 1500
12 x 6 12 x 9
3
/
4
Centrifugal — Direct Drive
1
/2 (1075)
Not
Available
Copper Tubes — Aluminum Fins
Copper Tubes — Aluminum Fins
1...14 x 34 x 1 1...21 x 34 x 1
Factory-Supplied Cleanable Type
1
/
2
3
/
8
NOTE:
If components are to be split, the maximum length of refrigerant tubing to be
used is 50 equivalent ft, assuming components will be installed in same horizontal plane.
If components are not to be installed in same horizontal plane, contact your Bryant representative for more information.
R-22
Scroll
426 ± 7
320 ± 20
27 ± 4
67 ± 7
3
/4...FPT
11
3
/4 (1050)
Centrifugal Belt Drive
1600 2000
1
/
2
3
/
8
1300
10 x 8
1
/
1
1725
4.2
2.4-3.4
2
1
/
2
1
/
2
3
/
8
Fasten threaded rods through holes in end frames. Use 2 rods on each
NOTE:
side of unit for a total of 4.
All panels must be in place when rigging.
OPERATING WEIGHT DISTRIBUTION AND
CENTER OF GRAVITY
UNIT
502A
024
036
112/51 143/65 183/83 142/64 2-5 /737 2-3 /686
048
114/52 143/65 186/84 147/67 2-4
060
WEIGHT (lb/kg)
OF CORNER
1234 A B
93/42 108/49 139/63 120/54 2-5 /737 2-1
95/43 113/51 148/67 124/56 2-4
DIMENSIONS
(ft-in./mm)
3
/4/730 2-2 /660
3
/4/730 2-23/4/679
3
5
/8/651
FIELD-INSTALLED ACCESSORIES
Thermostat and Subbase —
accessory provides precise temperature control. Automatic and
Manual changeover models available. A thermostat subbase is
available that works with Cycle-LOC™ circuitry. If a safety
device trips, compressor locks out and subbase warning light
(LK OUT) alerts occupant.
Two models available: Two stage cool/two stage heat and one
stage cool/one stage heat.
Time Guard® II Circuit (standard on single-phase units) —
Time Guard II device prevents short cycling of compressor if
thermostat is rapidly changed; automatically prevents compressor from restarting for 5 minutes after shutdown.
Electric Heaters —
A wide range of models available from 5 to
30 kW, 208-, 240- and 480-v, single- and 3-ph units. Mount easily on 502A discharge opening. Heater control box accessible
from the bottom of heater.
Attractive wall-mounted 24-v
Condensate Pump —
The condensate pump is used when the
distance and slope to the nearest drain is far enough to prevent
the natural drainage of unit. The pump is mounted remotely
from the unit and includes a signal light (field-installed) which
illuminates when the reservoir rises beyond a certain level. The
unit automatically shuts down when this reservoir level is
achieved.
Head Pressure Control Damper —
This accessory is duct
mounted and allows unit to mechanically cool down to 0° F.
Damper dimensions fit 024, 036 sizes.
NOTE:
For use with 048 and 060 size units, ductwork from unit
to damper must be reduced in size to fit damper dimensions.
Vibration Isolators —
Package of four isolators used for dampening any unit vibration so that vibrating sounds are not
transmitted to building structure. Isolators are spring, ceiling
type.
88EN ELECTRIC HEAT MODULE
ACCESSORY
DIMENSIONS (in.)
UNIT
502A
024,036
048,060
ABCD
1
13
/216 21/281/271/8 x 14
3
24 21
/431971/8 x 207/
DUCT
OPENING
HEAD PRESSURE CONTROL DAMPER (in.)
8
4
BASE UNIT DIMENSIONS
DIMENSIONS (ft-in.)
UNIT
502A
024
036
048
060
ABCDE
2-5 2-1
3
/42-2 1- 53/41-2 1-1
2-4
2-5 2-3 1-11
3
2-4
/42-23/41-115/81-87/81-77/
5
/81- 53/41-2 1-1
5
/81-87/81-77/
8
8
Unit Component Locations
5
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