Carrier 50LJ - Manual (Page 35)

LEGEND AND NOTES FOR FIG. 36 AND 37
AFS — Airflow Switch 1 —
APS — Air Pressure Switch ICP
—
C —
Contactor, Compressor IDC
—
CB — Circuit Breaker IDM
—
CCB — Control Circuit Breaker IFC
—
CH — Crankcase Heater
CLO —
Compressor Lockout IFCB
—
COMP — Compressor Motor
CS — Centrifugal Switch IFM
—
CV — Constant Volume LPS
—
DMS — Damper Motor Switch LS
—
DU —
Dummy Terminbal MAT.
—
EC
—
Enthalpy Control MGV
—
ECON — Economizer OFC —
EFM — Exhaust Fan Motor
EQUIP —
Equipment OFM —
FLA — Full Load Amps P
—
GND — Ground PEC
—
GR — Gas Relay PG
—
HC — Heater Contactor PGV —
HPCT — Head Pressure Control PI —
Thermostat PV
—
BPS — High-Pressure Switch QT
—
HR — Heat Relay RS
—
HV — High Voltage SC —
Ignitor SEN —
Ignitor Control Pack SW —
Induced Draft Contactor TB —
Induced Draft Motor TRAN —
Indoor (Evaporator) Fan V —
Contactor ^
Indoor (Evaporator) Fan Circuit
Breaker
Indoor (Evaporator) Fan Motor Q
Low-Pressure Switch
Limit Switch 1^
Mixed Air Thermostat ^
Main Gas Valve 0
Outdoor (Condenser) Fan
Contactor < >•
Outdoor (Condenser) Fan Motor
Plug Assembly ---------
Power Exhaust Contactor ,
Pilot Gas
Pilot Gas Valve ---------
Plug Assembly
Pilot Valve
Ouadruple Terminal —•
Rollout Switch
Safety Circuit
Sensor
Switch
Terminal Block
Transformer
Voltage
Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Spliced (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential only,
not to represent wiring/
NOTES
1. CB Must Trip Amps are equal to or less than 140% FLA.
2. If any of the original wire furnished must be replaeed,
it must be replaced with Type 90 C wire or its
equivalent.
3. Number(s) indicate the line location of contacts. A bracket
over (2) numbers signifies single pole, double throw con­
tacts. An underlined number signifies a normally closed
contact. Plain numbers (no lines) signify a normally open
contact. Line numbers 1-500 are located on power sche­
matic, 501-800 are on 115-v control schematic, 801 and
on are on 24-v control schematic.
4.
5.
6 .
Condenser-fan motors are thermally protected.
Three-phase motors are protected under primary single­
phasing conditions.
Tran 1 and 2 are wired for 460 v on 460-v units and for
208
V
for 208/230-v units. If 208/230-v units are to run
with 230-V power supply, the control circuit transformer
must be rewired as follows: disconnect the BLU and YEL
wire on TRAN 1 and connect to . Also disconnect
the BLU wire on TRAN 2 and connect to 230-v lead.
35