Low Voltage Control Connections; Accessory Control Wiring; Main Control Board - York AVV25B Installation Manual

SECTION X: LOW VOLTAGE CONTROL
CONNECTIONS
The 24 volt power supply is provided by an internally wired low voltage
transformer which is standard on all models, However, if the unit is con-
nected to a 208 volt power supply, the low voltage transformer must be
rewired to the 208 volt tap. See the unit wiring label.
Remove desired knockout and pierce foil faced insulation to allow wir-
ing to pass through. Use as small of a hole as possible to minimize air
leakage.
Install a 7/8" plastic bushing in the selected hole and keep low voltage
wiring as short as possible.
To further minimize air leakage, seal the wiring entry point at the out-
side of the unit.
The field wiring is to be connected with wire connectors to the wires
provided. Refer to Figures 15 and 16.
NOTICE
All wiring must comply with local and national electrical code require-
ments. Read and heed all unit caution labels.
FLOAT SWITCH
INPUT
LEAVING AIR TEMP
SENSOR TERMINALS
SERVICE
TOOL
PORT
COMM
PORT
FUSE
FIGURE 13: Main Control Board
Johnson Controls Unitary Products
HUMIDIFIER
ELECTRONIC
OUTPUT
AIR CLEANER
CFM
INDICATOR
EAC
FIGURE 12: Accessory Control Wiring
STATUS
HUMIDISTAT
INDICATOR
BLOWER
JUMPER
SPEED
JUMPERS
5292157-UIM-B-0317
AC/HP JUMPER
MODEL
ID PLUG
A0405-001
11