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5407934-UIM-C-1119
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury, death, or
equipment damage. Before installing, modifying, or servicing the sys-
tem, the main electrical disconnect switch must be in the OFF posi-
tion. There may be more than one disconnect switch. Lock out and tag
each switch with a suitable warning label.
Follow these steps:
1. Disconnect all high-voltage power from the system.
2. Connect the communicating control wiring to the indoor equipment
as shown in Figure 13. Do not connect the indoor equipment R wire
connection to variable capacity outdoor equipment.
Variable capacity AC and HP systems do not use an R wire to the out-
door unit.
The furnace control may be labeled so that C = GND.
3. Set the appropriate indoor jumper settings to ensure proper control
functionality. If you do not set the relevant jumpers, the thermostat
does not control all the functions you require, for example, dehumidi-
fication. See Table 4 and refer to the relevant equipment installation
manual.
22
WARNING
!
NOTICE
NOTICE
Johnson Controls Ducted Systems
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