5168274-BIM-I-1121
16
Johnson Controls Ducted Systems
Figure 15: Typical Field Wiring 24 Volt Thermostat
OCC
C
RC
G
Y2
Y1
W2
W1
X
R
THERMOSTAT
TERMINALS
CONTROL
TERMINAL
BLOCK
TERMINALS ON A
LIMITED NUMBER
OF THERMOSTATS
1
4
3
1
2
4
Second stage
ŚĞĂƟŶŐŶ
ot required on single stage he
ĂƟŶ
g units.
Jumper is required if there is no Smoke Detector circuit.
Jumper is required for any co
ŵďŝŶĂƟŽŶ
of R, RC, or RH.
5
5
OCC is an output from the thermostat to indicate the Occupied
ĐŽŶĚŝƟ
on.
X is an input to the thermostat to display Error Status condi
Ɵ
ons.
3
W2
Y1
G
OCC
Y2
X
R
SD-24
C
W1
2
24V
C
24 VAC
Class 2
SD-24
Jumper Located on Harness
Smoke
Detector
SD-R
24V Output
R
(If No Smoke Detector)
(If Smoke Detector Is Used)
R~Occ Jumper:
Smart Equipment Control boards come from the
factory with a jumper wire between R and OCC
terminals on the thermostat terminal strip. Failure
to remove this jumper will place the unit into the
Occupied mode no matter what the occupancy
demand is from the thermostat or EMS system.
To allow Thermostat or EMS control of the
Occupied mode for the unit, this jumper must be
removed during commissioning.
208/230-3-60 unit control transformers are factory wired
for 230v power supply. Change tap on transformer for
208-3-60 operation. See unit wiring diagram.
