Control Wire Sizes; Typical Control Wiring - York ZV-06 Installation Manual

5567611-BIM-B-1218
Thermostat wiring
Install the thermostat on an inside wall approximately 56 inches
above the floor. The thermostat must not be subject to drafts,
sun exposure, or heat from electrical fixtures or appliances.
Follow the manufacturer's instructions enclosed with thermostat
for the general installation procedure. Use color-coded,
insulated wires to connect the thermostat to the unit. See Table
11 for control wire sizing and maximum length.
Typical control wiring detail
THERMOSTAT
TERMINALS
W1
W2
1
Y1
Y2
Y3
G
R
3
C
RC
4
OCC
5
X
TERMINALS ON A
LIMITED NUMBER
OF THERMOSTATS
Second stage heating not required on single stage he
1
Jumper is required if there is no Smoke Detector circuit.
2
Jumper is required for any combination of R, RC, or RH.
3
OCC is an output from the thermostat to indicate the Occupied
4
X is an input to the thermostat to display Error Status conditions.
5
Figure 21: Typical control wiring
24
Y3
EXPANSION BOARD
TERMINAL BLOCK
g units.
Table 11: Control wire sizes
Wire size
20 AWG
18 AWG
16 AWG
1. From the unit to the thermostat and back to the unit.
R~Occ Jumper:
CONTROL
TERMINAL Smart Equipment Control boards come from the
BLOCK
factory with a jumper wire between R and OCC
terminals on the thermostat terminal strip. Failure
W1
to remove this jumper will place the unit into the
Occupied mode no matter what the occupancy
W2
demand is from the thermostat or EMS system.
Y1
To allow Thermostat or EMS control of the
Occupied mode for the unit, this jumper must be
G
removed during commissioning.
Y2
OCC
X
R
SD-24
C
C
24V
SD-24
Jumper Located on Harness
(If No Smoke Detector)
SD-R
R
on.
Maximum length
< 150 feet
150-250 feet
250-500 feet
Smoke
Detector
24 VAC
Class 2
2
(If Smoke Detector Is Used)
24V Output
Johnson Controls Ducted Systems
1