TYPICAL SCHEMATIC WIRING DIAGRAM
(Dual compressor units)
NOTE:
1. Refer to next page for legend, notes & wiring diagram for optional items.
2. Refer to unit control box (inside panel) for exact wiring diagram.
16
SEE COND.FM AND
WIRE
NEUTRAL
SWITCH OR CB
(SEE NOTE-4)
L3
TO FUSED
DISCONNECT
L1
L2
CC1
CC2
1
COMP
OLR1
T2
A
T1
A
T3
A
2
COMP
OLR2
T3
B
T2
B
T1
B
NTB
LUG
L3
L1
L2
BM CONNECTION
HVTB
TEST MODE
COMP2
M2
LEADING
J2 - (ANTI-RECYCLE TIMER JUMPER) -- PRESET TO 3 MIN
NOTE: FOR UNITS HAVING MORE THAN 2 COOLING STAGES, OR WITH HGS
LLS SHOULD ALWAYS BE IN M1 POSITION. - COMP1 AS LEAD COMP
[FOR AUTOMATIC LEAD LAG OPTION UNITS, PRESET TO 15D OR 30D]
LLS - (COMPRESSOR LEAD-LAG SEQUENCE JUMPER) -- PRESET TO M1
FACTORY SETTING OF J1,J2 & LLS
J1 - (PUMP DOWN DELAY TIME JUMPER) -- PRESET TO 30 SEC
LLS ( ADJ.)
SELECTION
LEADING
M1
COMP1
15 DAYS
CHANGE-OVER
MODE
RUN TIME
RT
15D
CHANGE-OVER
30 DAYS
30D
TIMER SETTINGS ON SM
ANTI-RECYCLE TIMER
PUMP DOWN DELAY
J1 ( ADJ.)
SEC'S
J2 ( ADJ.)
MIN
0
0
5
3
10
30
10
60
TST
90
[NOTE:11]
SEE OPTIONAL ECONOMIZER CONNECTIONS
24V
16
CB
1
TRANS1
230V
2
17
CR2
CR1
SR2
SR1
28C/29A
28D/29B
RB1
COMP
1
CC1
T3
A
T2
A
T1
A
L3
A
L2
A
L1
A
COMP
2
CC2
T3
B
T2
B
T1
B
OLR2
L3
B
L2
B
L1
B
DOL STARTING CONNECTION OF
COMPRESSOR - W/ CB [OPTIONAL]
L2
L3
L1
HVTB
SR1-1[RB1]
CONTROL CONNECTION
SR2-1[RB1]
TO ATB
220VAC (C)
POWER
Y1
17
5B
5A
2
HEATING
2 STAGE
nd
W2
30
DDC CONTROL PANEL
COOLING
2 STAGE
st
HEATING
1 STAGE
W1
29
Y2
31B
COOLING
1 STAGE
nd
st
Y1
31A
J2
BLW MTR
1
G
J1
18
C
17
LLS
OR THERMOSTAT
(BY OTHERS)
R
15
ATB
15
SEE COMPRESSOR PWS CONNECTION
IF COMP. IS STARTED IN PWS
ATB
2
3A
CR3
C1-CONTACTOR
CC1
TO NTB
N
PDSR1
PDSR2
SUPPLY
24VAC (C)
38B
38A
SUPPLY
BMR-1 [RB2]
P
23B
P
TO ATB
LPS2
P
TO SM
TO SM
24B
P
HPS2
25B
JP7
[SSPS2]
LPS1
23A
K1-T1
[SSPS1]
24A
HPS1
25A
JP4
18B
K1-T2
PDSR1-1[RB1]
PDSR2-1[RB1]
YR2-1[RB2]
CR2-1[RB1]
K3-T1
2B
K3-T2
1A
1B
JP2
F1
ATB
1
JP1
YR1-1[RB2]
CR1-1[RB1]
K2-T1
2A
K2-T2
[UVM]
TO HVTB
L1
3B
3A
65
55
LPS5 & 6
K4
HEATER RELAY
K5
K7
28
(NOTE-9)
NO
AFS
C
NC
17
K6
HEATER RELAY
STG 2
CB2
CB1
BMC
(NOTE - 8)
SEE OPS / DTS CONNECTION
TO ATB
TO ATB
OLR2-1
26B
JP8
[AI2]
27B
[AI1]
OLR1-1
26A
JP5
27A
BM CONTACTOR
IF COMP. IS STARTED IN PWS
SEE COMPRESSOR PWS CONNECTION
C2-PUMP DOWN SOLENOID
C1-PUMP DOWN SOLENOID
4A
4B
PDS2
PDS1
3B
C2-CONTACTOR
CR4
CC2
HR2
190 ± 15
FCS1 & 2
HPS1 & 2
450 ± 10
290 ± 10
360 ± 15
3
4
K3
FROM FR2 RELAY
(SEE OPTIONAL VFC CONNECTIONS)
FROM PDSR2 (RB1)
5B
LOCKOUT-C2
Y2
4B
39B
6B
SR2-2[RB1]
40B
RB2
STG 1
HR1
COOLING RELAY
STG 2
YR2
K1
K2
FROM PDSR1 (RB1)
6A
5A
2
4A
LOCKOUT-C1
SM
39A
SR1-2[RB1]
40A
FROM FR1 RELAY
(SEE OPTIONAL VFC CONNECTIONS)
OLR-1
18A
COOLING RELAY
STG 1
YR1
BM-CONTACTOR
BMR
PRESSURE SWITCH SETTINGS
25 ± 5
LPS1 & 2
LPS3 & 4
45
NAME
OPEN (PSIG)
50 ± 5
55
CLOSE(PSIG)
TO ATB
TO ATB
OLR1
(SEE NOTE -12)
REFER TO UNIT
NAMEPLATE FOR
POWER SUPPLY
