R
C
T
T
NS
NS
SC-Z20-NS PROGRAMMABLE NIGHT STAT
WIRING DIAGRAM
ZONE 13 ZONE 12 ZONE 1
1 ZONE 10 ZONE 9 ZONE 8 ZONE 7 ZONE 6 ZONE 5 ZONE 4 ZONE 3 ZONE 2
ZONE 1
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
R
C
Y
W
ZONE 20 ZONE 19 ZONE 18 ZONE 17 ZONE 16 ZONE 15
R
C
NOT USED
E
E
DAS
DAS
O/B
G
Y1
Y2
W1
W2
RH
RC
1 AMP
1 AMP
1 AMP
SPARE SYSTEM RH
SYSTEM RC
RH-RC
JUMPER
O/B
G
Y1
Y2
W1
W2
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
COOL
HEAT
4 AMP
PC BOARD
HP
HC SYSTEM
B O REV VALVE
3 ZONES OFF MINIMUM
2 ZONES OFF CALLS
ON OFF
ECONO
SPEED
UP
MODE
TIME DELAYS
DIVIDED BY 15
STATUS HEAT COOL
DAS ACTIVE
OCCUPIED
HEAT
AUTO
COOL
OVERVIEW:
The SC-Z20-NS programmable touchscreen thermostat can be used for occupied and unoccupied scheduling of the SC-Z20.
When wired and configured properly, the thermostat takes the place of a separate 7-day clock, night stat and override timer. The
SC-Z20-NS Programmable Fan option is used to trigger the ‘G’ fan relay to open or close the Clock Contact ‘T’ terminals on the
SC-Z20 panel that places the system in the occupied or unoccupied mode of operation. The thermostat can also be used with a
SC-T32-S1 Indoor Remote Sensor. 24 volt power to the thermostat is supplied by the SC-Z20 panel through dedicated Clock
Power terminals ‘R’ and ‘C’. The thermostat also has battery backup to maintain the real-time clock in the event of a power failure.
The thermostat can be configured to provide 7-day scheduling with 2 or 4 events per day. For commercial schedules, 2 events per
day is typical.
WIRING:
Wiring the SC-Z20-NS to the SC-Z20 panel only requires 18 gauge thermostat wire. (See diagram) Wire the thermostat ‘C’ terminal
to the Clock Power ‘C’ terminal on the SC-Z20 panel. Wire the thermostat ‘R’ terminal to the Clock Power ‘R’ terminal on the SC-
Z20 panel. Jumper the ‘R’ terminal on the panel to one of the Clock Contacts ‘T’ terminals. Wire the thermostat ‘G’ terminal to the
other Clock Contacts ‘T’ terminal. If an optional SC-T32-S1 remote sensor is used, use separate 18-2 wire and wire the sensor to
the ‘SC’ and ‘S1” terminals on the thermostat. (Polarity does not matter) Maximum wire distance between thermostat and sensor is
200 feet.
Optional
SC-T32-S1
Remote
Sensor
Terminals
PLACE JUMPER ACROSS
‘R’ AND ‘T’ TERMINALS
SC-Z20-NS
NIGHT STAT
S2 SC S1
O/B
AUX AUX
Y1 Y2 W1 G R C
Jackson Systems, LLC
www.jacksonsystems.com
WIRE
ACCESS
HOLE
BATTERY
COMPARTMENT
MOUNTING HOLES
MOUNTING HOLES
W2
MOUNTING
HOLE