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5407934-UIM-C-1119
Communicating Non-Variable Capacity Models
Figures 3 and 4 show control wiring using communicating controls (non-
variable capacity legacy outdoor models).
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.
Using a Communicating Wiring Harness
IMPORTANT: This procedure is only applicable to legacy communi-
cating systems as follows: CZF, CZH, AC6B, AC8B, AL6B, AL8B,
YZF, YZH, HC6B, HC8B, HL6B, and HL8B.
To use the S1-02542694000 communicating wiring harness:
1. Disconnect all high-voltage power from the system.
2. Plug the S1-02542694000 communicating harness into the outdoor
control board and route the harness to the low-voltage wiring com-
partment.
3. Remove the conventional low-voltage wiring leads from the outdoor
control board. Leave the wiring leads with the outdoor unit for future
use.
4. Connect the field low-voltage thermostat wiring to the communicating
control harness using spring wire connectors (commonly referred to
as wire nuts).
5. Push excess wiring into the low-voltage wiring compartment of the
outdoor unit.
When connecting the loose ends of the wire harness, ensure to note
the color of each of the four wires (A+, R, C, B-).
6. Set the wires that are now connected (with wire connectors) into the
junction box of the control housing.
7. Set the appropriate outdoor jumper settings to ensure proper control
functionality. See Table 3.
14
WARNING
!
NOTICE
Johnson Controls Ducted Systems
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