Carrier 50DK044 - Page 6

Table 7 — Output Pin and Terminal Assignments
OUTPUT PIN-
TERMINAL
NAME RATING
UNIT SIZES
024-030 034-074
J6-1
Stage 1
Compressor Relay (K1)*
24 vac
CR1
J6-2
Stage 2
Compressor Relay (K2)*
U2**
J6-3
Stage 3
Compressor Relay (K3)*
U1
J6-4
Stage 4
Compressor Relay (K4)†
Not Used
J6-5
Stage 5
Compressor Relay (K5)†
CR2
J6-6
Stage 6
Compressor Relay (K6)†
Not Used
J6-7 Economizer Open Relay (K7) EM-2 EOR
J6-8 Economizer Close Relay (K8) EM-3 ECR
J5-1 Supply Fan Relay (K9)
115 vac
IFC
J5-2 Morning Warm-Up Relay (K10) HIR
J5-3
Stage 1 Condenser
Fan Relay (K11)
OFC1/OFC2†† OFC2/OFC3 \
J5-4
Stage 2 Condenser
Fan Relay (K12)
Not Used OFC4 ¶
J5-5 External Alarm Relay (K13) R ALM
LEGEND
ALM — Alarm
CR — Control Relay
ECR — Economizer Close Relay
EM — Economizer Motor
EOR — Economizer Open Relay
HIR — Heat Interlock Relay
IFC — Indoor (Evaporator) Fan Contactor
OFC — Outdoor (Condenser) Fan Contactor
R—Alarm Relay
U—Unloader
*Circuit 1.
†Circuit 2.
**U2 is not used on 044 units.
††OFC2 is controlled by a temperature switch.
\ OFC2 on 034,044 units; OFC3 on 054-074 units.
¶ Used on 054-074 units only.
LEGEND
CR — Control Relay
J—Terminal Pin Connectors
K—Relay
Fig. 5 — Relay Board
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