Zehnder Rittling VS Series Installation, Operation And Maintenance Manual page 40

Wiring diagram
277V, EC motor
Unit
Power Supply
277V /60HZ/1PH
G
L2 L1
Note 4
Optional
Disconnect
Switch
Transformer
Typical 24VAC
2-Stage stat
24VAC
+
Connect to
-
network
+
-
Optional
BACnet or
Lonworks card
Legend
Factory low voltage wiring
Factory high voltage wiring
Field low voltage wiring
Field line voltage wiring
Optional block
Internal PCB connection
Quick connect terminal
Screw terminal
Notes
1. Used for optional communicating thermostat.
2. Cut JP1 or JP2 for dry contact output on accessory relay 1 and 2.
3. If a single stage thermostat is used place a jumper wire between
Y1 and Y2 at P1 terminal.
38
Black
Blue Capacitor
Yellow
T2
T1
CC
L2 L1
Blue
24V
Yellow
P1
RC
Red
R
R
White
C
Note 3
C
Yellow
Y1
Y1
Blue
Y2
Y2
Black
O
O
Brown
G
G
AL
AL
W
Field
P2
installed
wiring
NSB
ES
Zone valve R
R
NO1
ACCESSORY
NC1
RELAY 1
Note 5 COM
NO2
ACCESSORY
NC2
RELAY 2
COM
P3
+
-
COM
COM 2
(NETA)
(NETB)
(A)
(B)
CC
BR1
BR2
HP
LP
FP1
FP2
CO
RV
DAT
LWT
Wire colors
3/4 HP
1/4 HP
Blue
Compressor
S C
R
SEE MOTOR CHART
SEE MOTOR CHART
SEE MOTOR CHART
R
C
SW1
Off/On
1
Test/Normal
2
FP1=GLYCOL / WATER
3
Tstat=Comm/24VAC
4
RV=Cooling OFF/ON
5
Com2/com1
6
Com2 modbus address
7
Com2 modbus address
8
Com2 modbus address
Power
Note 2
JP1
Note 2
JP2
J1
3 1
2
P4
Note 1
COM 1
Compressor contactor
Fan relay speed 1
Fan relay speed 2
High pressure switch
Low pressure switch
Freeze protection water side
Freeze protection air side
Condensate overflow
Reversing valve
Discharge air temperature
Leaving water temperature
4. If disconnect option is not installed connect line power to the L1
and L2 lugs on the compressor contactor.
5. Accessory relays 24VAC max. Activated by compressor output.
6. All 208-230V units are factory wired for 208V operation. If supplier
voltage is 230V, installer must rewire transformer.
Discrete speeds
1st spd 2nd spd Comm
Red Blue Brown
Purple White Blue
Grn
BR1
Orange
BR2
Black
P6
Black
Black
LD 1
Black
White
LD 2
White
LD 3
Yellow
Yellow
LD 4
CCG
Black
CC
CC
Black
P5
Black
Black
Red
Red
Orange
Orange
Brown
Relay coil
Capacitor
High pressure switch
Low pressure switch
Temperature thermistor
Condensate switch
Relay contacts
Power leads
L1 L2
Black White
Black Red
ECM
Blower
Motor
MOTOR
HARNESS
TWO 24VAC
DISCRETE
SPEEDS
LWT
T
DAT
T
FP1
T
FP2
T
HP
LP
RV
CO1