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31
LEGEND AND NOTES FOR FIG. 19-25
LEGEND
NOTES:
1. Factory wiring is in accordance with the National Electrical
Codes. Any field modifications or additions must be in compli-
ance with all applicable codes.
2. Use 75° C min wire for field power supply, use copper wires for
all units.
3. All circuit breakers “Must Trip Amps” are equal to or less than
156% RLA (rated load amps).
4. Compressor and fan motors are thermally protected — three
phase motors protected against primary single phase conditions.
5. Red jumper wire must be added between R and W1 for space
temperature mode and temporarily during service-test mode
when the heaters need to operate.
AUX
—
Auxiliary
BP
—
Building Pressure
C
—
Contactor, Compressor
CAP
—
Capacitor
CB
—
Circuit Breaker
CCB
—
Control Circuit Breaker
CCH
—
Crankcase Heater
CCN
—
Carrier Communication Network
CEM
—
Controls Expansion Module
COMP
—
Compressor Motor
CS
—
Compressor Safety
CSB
—
Current Sensing Board
DP
—
Duct Pressure
DS
—
Disconnect Switch
ECB
—
Economizer Control Board
EDT
—
Evaporator Discharge Sensor
EMM
—
Energy Management Board
FIOP
—
Factory-Installed Option
GND
—
Ground
HC
—
Heat Contactor
HGBP
—
Hot Gas Bypass
HIR
—
Heat Interlock Relay
HPS
—
High Pressure Switch
HR
—
Heater Relay
IAQ
—
Indoor Air Quality
IDM
—
Induced Draft Motor
IFC
—
Indoor Fan Contactor
IFCB
—
Indoor Fan Circuit Breaker
IFM
—
Indoor Fan Motor
IGC
—
Integrated Gas Unit Controller
IP
—
Internal Protection
LEN
—
Local Equipment Network
LS
—
Limit Switch
MBB
—
Main Base Board
MGV
—
Main Gas Valve
NEC
—
National Electrical Code
OARH —
Outdoor Air Relative Humidity Sensor
OAT
—
Outdoor Air Thermostat
OFC
—
Outdoor Fan Contactor
OFM
—
Outdoor Fan Motor
PEC
—
Power Exhaust Contactor
PEM
—
Power Exhaust Motor
PL
—
Plug Assembly
PTC
—
Positive Temperature Coefficient
Power Reference
RARH —
Return Air Relative Humidity Sensor
RAT
—
Return Air Thermistor
RS
—
Rollout Switch
SCB
—
Staged Gas Board
SCT
—
Saturated Condensing Temperature Sensor
TB
—
Terminal Block
TRAN —
Transformer
VFD
—
Variable Frequency Drive
Terminal Block
Terminal (Unmarked)
Terminal (Marked)
Splice
Factory Wiring
Field Wiring
To indicate common potential only.
Not to represent wiring.
To Indicate FIOP or Accessory
Summary of Contents for 48AJ/AK/AMD020
Page 3: ...3 Fig 1 Roof Curb 50AJ AK020 035 Units...
Page 4: ...4 Fig 2 Roof Curb 50AJ AK040 050 Units...
Page 5: ...5 Fig 3 Roof Curb 50AJ AK060 Units...
Page 6: ...6 Fig 4 Reduced Supply Duct Opening Roof Curb 50AJ AK060 Units...
Page 7: ...7 Fig 5 Base Unit Dimensions 50AJ AK020 035...
Page 8: ...8 Fig 6 Base Unit Dimensions 50AJ AK040 050...
Page 10: ...10 Fig 8 Base Unit Dimensions 50AW AY020 035...
Page 11: ...11 Fig 9 Base Unit Dimensions 50AW AY040 050...
Page 32: ...32 CONTROLS OPTION BOARD Fig 19 Small Chassis Component Location Size 020 035 Units...
Page 33: ...33 CONTROLS OPTION BOARD Fig 20 Large Chassis Component Locations Size 040 060 Units...
Page 34: ...34 Fig 21 Typical Main Control Box Wiring Schematic TO NEXT PAGE TO NEXT PAGE...
Page 35: ...35 FROM PREVIOUS PAGE FROM PREVIOUS PAGE Fig 21 Typical Main Control Box Wiring Schematic cont...
Page 36: ...36 TO NEXT PAGE TO NEXT PAGE Fig 22 Auxiliary Control Box Wiring Schematic...
Page 38: ...38 Fig 23 Typical Power Schematic Size 060 Unit Shown...
Page 39: ...39 Fig 23 Typical Power Schematic Size 060 Unit Shown cont...
Page 40: ...40 Fig 24 Controls Option Wiring Schematic...
Page 41: ...41 Fig 25 Electric Heat Control Circuit Size 060 Unit Shown...
Page 47: ......