Carrier 50PEC09-18 Installation, Start-Up And Service Instructions Manual page 19

AL — Alarm Relay Contacts
BM — Blower Motor
BR — Blower Relay
CAP — Capacitor
CB — Circuit Breaker
CO — Sensor, Condensate Overflow
CR — Compressor Relay
DM — Damper Motor
ES — End Switch
FP1 — Sensor, Water Coil Freeze Protection
FP2 — Sensor, Air Coil Freeze Protection
FSS — Fan Speed Switch
HP — High-Pressure Switch
HPS — High-Pressure Switch
HPWS — High-Pressure Water Switch
JW1 — Jumper Wire for Alarm
LOC — Loss of Charge Pressure Switch
LON — Local Operating Network
PB — Power Terminal Block
RVS — Reversing Valve Solenoid
TRANS — Transformer
WV — Water Valve
LEGEND
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Fig. 18 — 50PEC Unit with Complete C and LON Controllers
Complete C
Field Line Voltage Wiring
Field Low-Voltage Wiring
Option Low-Voltage Wiring
Printed Circuit Trace
Relay/Contactor Coil
Solenoid Coil
Thermistor
Circuit Breaker
Relay Contacts-N.O.
Switch-Temperature
Switch-High Pressure
Switch-Low Pressure
Ground
Wire Nut
Mate-N-Lock
19
Complete C
*Optional wiring.
NOTES:
1. Compressor and blower motor thermally pro-
tected internally.
2. All wiring to the unit must comply with local
codes.
3. Transformer is wired to 240-V (ORG) lead for
240-1-50 units. For 220-1-50 operation, switch
the RED and ORG leads at L1 and insulate the
RED lead. Transformer is energy limiting or may
have a circuit breaker.
4. FP1 thermistor provides freeze protection for
water. When using anti-freeze solutions, cut JW3
jumper.
5. Low voltage wiring must be class 1 and voltage
rated equal or greater than unit supply voltage.
6. Factory cut jumper (JW1). Dry contact will be
available between AL1 and AL2.
7. Transformer secondary ground via GRN/YEL
wire from C to control box.
8. See view A for wiring of units with water valve
(part no. 23B00112N01) or view B for units with
water valve (part no. 23B00112N03).