Carrier 48LDT005 - Page 23

TYPICAL WIRING DIAGRAM LEGEND
(48HD,LD008)
AHA
—
Adjustable Heat Anticipator
PI
Plug Assembly
Assy
—
Assembly
PS -
Pilot Sensor
C
—
Contactor Compressor
QT -
Quadruple Terminal
CAP.
—
Capacitor RLC —
Rotor Locking Circuit
CC
—
Cooling Compensator RS —
Rollout Switch
CH —
Crankcase Heater Std -
Standard
CLO —
Compressor Lockout
Sw —
Switch
CLS
—
Cooling Lockout Switch TB -
Terminal Block
COMP
—
Compressor Motor TC —
Thermostat, Cooling
CS —
Centrifugal Switch
TDR
Time-Delay Relay
DM —
Damper Motor
TH -
Thermostat, Heating
DR
—
Damper Relay
TRAN -
Transformer
EC
—
Enthalpy Control
ECT
—
Economizer Thermostat
Marked Wire
Equip
Fu
—
Equipment
Fuse
0
Denotes Connection Point Between
Gnd
—
Ground
Subbase and Thermostat
HPS
1
—
High-Pressure Switch
Ignitor Electrode
O
Terminal (Marked)
IDM
—
Induced Draft Motor
O
□
Terminal (Unmarked)
IDR
_ _
Induced Draft Relay
Terminal Block
IFC
—
Indoor Fan Contactor
1FM
—
Indoor Fan Motor
•o
Field Splice
1FR
—
Indoor Fan Relay
IPP
—
Ignitor Power Pack
Splice (Marked)
L
LPS
—
Light
Low-Pressure Switch
— m —
Factory Splice
LS
Limit Switch
Factory Wiring
MAT.
—
Mixed Air Thermostat
Internal Connection
MGV
Mtr
NS
—
Main Gas Valve
Motor
Night Setback Switch
_
Accessory or Optional Wiring
I
—
Field Control Wiring
OAT.
—
Outdoor Air Thermostat
—
Field Power Wiring
OFM
Outdoor Fan Motor
Pilot Gas Valve
To indicate common potential only,
not to represent wiring
PGV
—
TYPICAL WIRING DIAGRAM NOTES
(48HD,LD008)
1. Compressor and fan motors are thermally pro¬
tected — 3-phase motors are protected against
primary single-phasing conditions.
2. If any original wires must be replaced, use 90C
wire or equivalent.
3. Numbers indicate the line location of used con¬
tacts. 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 HH07AT172 or 174 with
subbase HH93AZ177.
5. Set heat anticipators at one amp (208/230-3-60).
Set heat anticipators at 1.2 amp (460-3-60).
6. Factory connected to 230-v or 460-v lead per unit
rated voltage. If 208-v power supply is used,
connect to 200-v lead and insulate 230-v lead.
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