Johnson Controls 22 SEER Section Xvi Outdoor Unit Wiring Connections, UIM-B-0113

898841-UIM-B-0113

BUILDING STRUCTURE

GROUND

LEVEL

Install unit level or maintain slope tolerance of 2 degrees

(or 2 inches per 5 feet [50 mm per 1.5 m] away from building structure.

FIGURE 29: Outdoor Unit Installation

NOTICE

This system contains both refrigerant and oil. Some rubber roofing material may absorb oil. This will cause the rubber to swell when it comes into contact with oil. The rubber will then bubble and could cause leaks. Protect the roof surface to avoid exposure to refrigerant and oil during service and installation. Failure to follow this notice could result in damage to roof surface.

SECURING OUTDOOR UNIT TO SLAB OR FRAME

If the outdoor unit is installed on a field-provided slab or frame, use lag bolts or equivalent to secure the outdoor unit to the slab or frame.

FOUR FIELD PROVIDED ANCHOR BOLTS

FIGURE 30: Outdoor Unit Slab or Frame Installation

SECTION XVI: OUTDOOR UNIT WIRING CONNECTIONS

In the United States, wiring must conform with current local codes and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC).

The main system circuit breaker or disconnect should be sized per unit requirements and should be installed adjacent to outdoor unit.

Mis-wiring could damage unit or cause communication errors between indoor and outdoor unit.

NOTICE

•Refer to unit nameplate for minimum circuit ampacity and maxi- mum overcurrent protection size

•Local codes may require a disconnect between the indoor and out- door units

•The main system circuit breaker and outdoor unit disconnect switch should be sized per local codes and unit requirements

•Stranded wire must be used to connect the outdoor unit to the indoor unit. The stranded wire is necessary to ensure proper sys- tem communication and operation.

•Make sure you use an approved circuit breaker or switch

Model	Fuse or Circuit Breaker Capacity
9K & 12K	20A
18K & 24k	25A
30K & 36k	30A

1.Remove outdoor unit access panel.

2.Route all wiring to outdoor unit through the wire routing plate.

ROUTE WIRES
THROUGH
ROUTING	ACCESS PLATE
PLATE

FIGURE 31: Outdoor Unit Electrical Connections

3.Connect the control wiring and power supply wiring to the outdoor unit wiring terminals according to the figures shown in this section.

4.The unit must be grounded according to local codes.

5.Fasten the power supply cord and control wiring with cord clamp.

6.Secure wiring using built-in wire strain relief.

7.Install the outdoor unit access panel back.

14 Johnson Controls Unitary Products