Control Wire Sizes; Typical Electronic Thermostat Field Wiring - York DC SERIES Installation Manual

5120410-XIM-B-0216
Thermostat Wiring
The thermostat should be located on an inside wall
approximately 56 inch above the floor where it will not be
subject to drafts, sun exposure or heat from electrical fixtures or
appliances. Follow the manufacturer's instructions enclosed
with thermostat for general installation procedure. Seven (7)
color-coded, insulated wires should be used to connect the
THERMOSTAT
TERMINALS
W1
W2
1
Y1
Y2
G
R
3
C
RC
4
OCC
5
X
TERMINALS ON A
LIMITED NUMBER
OF THERMOSTATS
Second stage ot required on single stage he
1
Jumper is required if there is no Smoke Detector circuit.
2
Jumper is required for any co
3
OCC is an output from the thermostat to indicate the Occupied
4
X is an input to the thermostat to display Error Status condi ons.
5
Figure 22: Typical Electronic Thermostat Field Wiring
20
CONTROL
TERMINAL
BLOCK
W1
W2
Y1
G
Y2
OCC
X
R
SD-24
C
g units.
of R, RC, or RH.
on.
thermostat to the unit. Refer to Table 12 for control wire sizing
and maximum length.
Table 12: Control Wire Sizes
Wire Size
18 AWG
1. From the unit to the thermostat and back to the unit.
C
24V
SD-24
Jumper Located on Harness
(If No Smoke Detector)
SD-R
R
380/415-3-50 units control transformers are factory
wired for415v power supply respectively. Change tap on
transformer for 380-3-50 operation. See unit wiring
diagram.
Maximum Length
150 Feet
Smoke
Detector
24 VAC
Class 2
2
(If Smoke Detector Is Used)
24V Output
Johnson Controls Unitary Products
1