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Contractor: P.O.:
Engineer:
Project Name:
Unit Tag:
SD2552WNB 09/16
23
Page _____ of _____
ENVISION
2
NKW
REVERSIBLE CHILLER - 50Hz
Wiring Schematics
160
ё
Compressor A T2
Red (23)
Compressor A T1
SC
T
SUC P
White (24)
Black (25)
HWHW
Blue (89)
Blue (90)
Red (91)
Red (92)
White (31)
FLOW METER
PRESSURE
TRANSDUCER
PRESSURE
TRANSDUCER
P8
MO
TO
R
P6
RS
485
P7
ZO
NE
P9
AB
C
ST
EP
PER
AN
A
AC
C2
DH
DI
V
NO
CO
M
K6
NO
CO
M
K5
C
R
L1
L1
L2
L2
P1
2
P10
P5
P11
C
R
(-)
(+
)
C
R
(-)
(+
)
C
R
(-)
(+
)
P4
P2
K1
K2
K3
HA
2
HA
1
SG
I
LO
O
P
VS
DA
TA
VS
PU
M
P
PU
MP
SL
AV
E
P3
V+
C
R
TX
RX
+5
P14
LLT
P1
LA
T
FL
O
W
LW
T
EW
T
CT
2
4
3
CT
2
4
3
CT
1
2
1
CT
1
2
1
Status
G
DI
SC
H
P16
P17
P18
P15
(Aurora Expansion Board A)
AXB™-A
SW1
Modbus Add. ID
Future Use
1
2
3
4
5
ON
OFF
Future Use
Acc 2 – Dip 1
Acc 2 – Dip 2
See Figure 1 for
DHW wiring.
Current Transducer
(CT)
Thermistor
Light emitting diode -
Green
Relay coil
Capacitor w/ bleed resistor
Switch - Condensate
overflow
Switch - High pressure
Switch - Low pressure
Polarized connector
Factory Low voltage wiring
Factory Line voltage wiring
Field low voltage wiring
Field line voltage wiring
Optional block
DC Voltage PCB traces
Junction
Quick connect terminal
Wire nut
Field wire lug
Ground
Fuse
EWT –
Entering Water Temperature
LLT –
Liquid Line Temperature
LWT –
Leaving Water Temperature
SCP –
Suction Pressure
SCT –
Suction Temperature
Legend
Relay Contacts-
N.O., N.C.
G
T
1
3
2
P
L1
Breaker
CS
+5
C
C
C
21
IN
OU
T
+5
S
To ABC-A
EX-29
EX-28
EX-27
EX-26
EX-22
EX-21
Blue (22)
Blue (21)
EX-33
EX-34
EX-36
EX-37
EX-35
EX-31
EX-25
EX-24
EX-23
White (26)
White (27)
Purple (28)
Purple (29)
Brown (33)
Brown (34)
Red (37)
White (36)
Black (35)
EX-41
EX-40
EX-39
EX-38
Blue (38)
Pink (39)
Yellow (40)
Purple (41)
Blue/White (85)
Yellow/White (87)
Pink/White (86)
Purple/White (88)
2
1
3
4
COM
OUT
5 VDC
N/A
2
1
3
4
COM
OUT
5 VDC
N/A
EX-32
Green (32)
“EX” Connector
(twist lock)
27 28
33 34
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
Sou rce
SCT
Re d
Sou rce
SCP
21 22 23 24 25 26
29 30 31 32
35 36 37 38 39 40
Sou rce
EWT
Sou rce
LW T
GN
D
OU
T
2
3
2
Flow
M ete r
3
+V
15
V
DC
Pow er
Sup ply
Sou rce
LL T
Gr ee n
Source
DI SCH
Lo ad
SCT
Re d
Lo ad
SCP
Lo ad
EWT
Lo ad
LW T
GN
D
OU
T
2
3
2
Flow
M ete r
3
+V
15
V
DC
Pow er
Sup ply
Lo ad
LL T
Gr ee n
Load
DI SCH
Note 1
Reversible Chiller HydroLink Aurora 30-150
