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Bryant 502A, Manual

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Bryant 502A Manual Download Page 13

13

TYPICAL WIRING SCHEMATICS (cont)

LEGEND

AHA

—

Adjustable Heat Anticipator

BKR W/AT —

Breaks with Amp Turns

C

—

Contactor Compressor

CC

—

Cooling Compensator

CLO

—

Compressor Lockout

COMP

—

Compressor Motor

CT

—

Current Transformer

EQUIP

—

Equipment

GND

—

Ground

HPS

—

High-Pressure Switch

IFC

—

Indoor-Fan Contactor

IFM

—

Indoor-Fan Motor

IFR

—

Indoor-Fan Relay

JB

—

Junction Box

L

—

Light

LOR

—

Lockout Relay

LPS

—

Low-Pressure Switch

NEC

—

National Electrical Code

OFM

—

Outdoor-Fan Motor

PL

—

Plug Assembly

PRI

—

Primary

TB

—

Terminal Block

TC

—

Thermostat-Cooling

TH

—

Thermostat-Heating

TRAN

—

Transformer

Marked Wire

Denotes connection point between
subbase and thermostat

Terminal (Marked)

Terminal (Unmarked)

Terminal Block

Field Splice

Splice (Marked)

Factory Splice

Factory Wiring

Accessory or Optional Wiring

Field Control Wiring

Field Power Wiring

To indicate common potential
only, not to represent wiring

502A048,060, 575-3-60 Units

NOTES:

1. Compressor and fan motors are thermally protected, three-phase

motors protected against primary single-phase conditions.

2. If any original wires furnished must be replaced, it should be

replaced with 90 C or its equivalent.

3. Numbers indicate the line location of used contacts. A bracket

over 2 numbers signifies a single-pole double-throw contact. An
underlined number signifies a normally closed contact. Plain (no
line) number signifies a normally open contact.

4. Must use thermostat HH07AT170, 172 or 174 with subbase

HN63AZ176, 177 or 179.

5. Neutral for 240/416 v supply (Canada only).
6. The CLO locks out the compressor to prevent short cycling on

compressor overloads and safety devices, before replacing CLO
check these devices.

Summary of Contents for 502A

Page 1: ... quiet operation Bryant engineers met the 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 When it comes to maintenance the 502A unit rates high in accessibility Indoor location is ideal for the maintenance technician and five access panels easily r...

Page 2: ...000 800 10 80 11 00 78 036 208 230 1 60 4 3 36 000 1200 10 00 10 05 82 208 230 3 60 9 0 460 3 60 9 0 048 208 230 1 60 5 5 49 500 1600 10 20 10 40 82 208 230 3 60 9 1 460 3 60 9 1 575 3 60 9 1 060 208 230 1 60 6 9 58 500 2000 9 75 10 05 82 208 230 3 60 8 55 460 3 60 8 55 575 3 60 8 55 dB Decibels EER Energy Efficiency Ratio SEER Seasonal Energy Efficiency Ratio TDR Time Delay Relay 2 EER NET CAPACI...

Page 3: ...725 EVAPORATOR AIR FAN Standard Centrifugal Direct Drive Nominal Cfm 800 1200 1600 2000 Max Rpm 1100 1150 1050 Blower Size in 10 x 5 10 x 6 10 x 6 Motor Hp Rpm 1 6 850 1 2 1075 3 4 1050 EVAPORATOR AIR FAN Optional Centrifugal Belt Drive Nominal Cfm Not Available 1600 2000 Max Rpm 1300 Blower Size in 10 x 8 Motor Hp 11 2 Motor Rpm 1725 Pulley Pitch Diameter in Blower 4 2 Motor Variable 2 4 3 4 COND...

Page 4: ...rom the bottom of heater 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 Hea...

Page 5: ...NIT DIMENSIONS DIMENSIONS ft in UNIT 502A A B C D E 024 2 5 2 15 8 1 53 4 1 2 1 1 036 2 43 4 2 2 1 53 4 1 2 1 1 048 2 5 2 3 1 115 8 1 87 8 1 77 8 060 2 43 4 2 23 4 1 115 8 1 87 8 1 77 8 Unit Component Locations ...

Page 6: ...ondenser fan assembly PERFORMANCE DATA GROSS COOLING CAPACITIES See Legend on page 7 502A024 Temp Air Ent Condenser F Evaporator Air Quantity Cfm BF 600 0 02 800 0 03 1000 0 04 Evaporator Air Ewb Temp F 72 67 62 72 67 62 72 67 62 85 TC 27 1 25 3 23 0 27 7 26 4 24 6 27 8 26 9 25 8 SHC 13 5 17 0 20 2 14 7 19 4 23 7 15 6 21 5 25 8 kW 1 64 1 62 1 61 1 65 1 63 1 62 1 65 1 64 1 63 95 TC 26 6 24 5 20 8 2...

Page 7: ... 63 4 63 115 TC 49 5 45 5 38 6 37 7 51 2 47 6 41 9 42 1 52 2 49 1 45 8 45 8 SHC 25 5 32 2 37 0 37 7 28 3 27 3 41 8 42 1 30 7 42 0 45 8 45 8 kW 5 21 5 09 4 92 4 89 5 27 5 17 5 03 5 03 5 30 5 23 5 14 5 14 BF Bypass Factor Ewb Entering Wet Bulb kW Compressor Motor Power Input kilowatts SHC Gross Sensible Heat Capacity 1000 Btuh TC Gross Total Cooling Capacity 1000 Btuh BYPASS FACTOR BF ENTERING AIR D...

Page 8: ...llows 036 4 turns open 048 2 turns open 060 5 turns open CFM UNIT SIZE 502A 048 060 ESP Fan kW ESP Fan kW 1800 1850 1900 1950 81 1 03 2000 72 1 05 2050 63 1 07 2100 55 1 08 1 02 1 17 2150 47 1 11 93 1 21 2200 42 1 14 84 1 24 2250 34 1 17 75 1 27 ESP External Static Pressure in wg kW Total Fan Power Motor Input kilowatts UNIT 502A COND CFM EXTERNAL STATIC PRESSURE in wg 0 0 0 1 0 2 0 3 0 4 0 5 0 6 ...

Page 9: ...87 254 13 5 99 0 1 5 5 60 1 0 3 93 26 4 35 460 3 414 508 7 4 49 5 1 5 2 80 1 0 1 97 14 0 20 060 230 1 207 254 28 8 169 0 75 4 00 1 5 9 50 49 5 70 208 230 3 187 254 17 3 123 0 75 4 00 1 5 4 82 30 4 45 460 3 414 508 9 0 62 0 75 2 15 1 5 2 41 15 8 25 575 3 518 632 7 1 50 0 75 1 40 1 5 1 90 12 2 20 060 208 230 3 187 254 17 3 123 0 1 5 5 60 1 5 4 82 32 0 40 460 3 414 508 9 0 62 0 1 5 2 80 1 5 2 41 16 5...

Page 10: ...n underlined number signifies a normally closed contact 4 Must use thermostat HH07AT170 172 or 174 with subbase HN63AZ176 177 or 178 5 Separate field power supply required for electric heater accessory 6 CLO locks out the compressor to prevent short cycling on compressor overloads and safety devices Before replacing CLO check devices LEGEND AHA Adjustable Heat Anticipator BKR W AT Brakes with Amp ...

Page 11: ...ed Wire Denotes connection point between subbase and thermostat Terminal Marked Terminal Unmarked Terminal Block Field Splice Splice Marked Factory Splice Factory Wiring Accessory or Optional Wiring Field Control Wiring Field Power Wiring To indicate common potential only not to represent wiring 502A024 230 1 60 Units NOTES 1 Neutral for 240 416 v supply Canada only 2 If any original wires furnish...

Page 12: ...ed Terminal Block Field Splice Splice Marked Factory Splice Factory Wiring Accessory or Optional Wiring Field Control Wiring Field Power Wiring To indicate common potential only not to represent wiring 502A048 060 230 1 60 Units NOTES 2 If any original wires furnished must be replaced it should be replaced with 90 C or its equivalent 3 Numbers indicate the line location of used contacts A bracket ...

Page 13: ...ctory Splice Factory Wiring Accessory or Optional Wiring Field Control Wiring Field Power Wiring To indicate common potential only not to represent wiring 502A048 060 575 3 60 Units NOTES 1 Compressor and fan motors are thermally protected three phase motors protected against primary single phase conditions 2 If any original wires furnished must be replaced it should be replaced with 90 C or its e...

Page 14: ...n to splice the outdoor fan motor factory wiring no 16 AWG American Wire Gage 4 64 in thick insulation Field wiring should be a minimum of no 16 AWG 4 64 in thick insulation Check all applicable electri cal codes to ensure proper compliance UNIT 502A 024 036 048 060 Without Head Pressure Control Minimum 35 35 40 40 Maximum 126 126 126 126 With Head Pressure Control Minimum 0 0 0 0 Maximum 126 126 ...

Page 15: ...nging 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 lubr...

Page 16: ...ield installed light shall illuminate when reservoir rises above a preset level Unit shall shut down upon reservoir light illumination 5 Head Pressure Control Package Allows unit to mechanically cool down to 0 F ambi ent temperature Package shall include damper operating device and all necessary hardware 6 Vibration Isolation Package Shall provide 4 spring hangers for ceiling mounted unit to dampe...

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