3A. ROUTE CONTROL WIRES TING

Install low voltage control wiring from outdoor to indoor unit and from thermostat to indoor unit. All low voltage wiring must enter unit through provided field−installed busing installed in electrical inlet.

Run 24VAC control wires through hole with grommet.

Make 24VAC control wire connections to outdoor control (A175).

NOTE AC control wires inside control box

.

B

NOTE

 

 

 

 

 

 

 

 

 

 

 

separation of field−installed low and high voltage circuits.

 

 

NOTE .

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WIRE RUN LENGTH

AWG# INSULATION TYPE

 

 

 

 

 

 

LESS THAN 100’ (30 METERS)

18

TEMPERATURE RATING

 

 

 

 

 

MORE THAN 100’ (30 METERS)

16

35ºC MINIMUM.

 

 

 

 

 

 

 

 

 

 

 

 

B. ROUTE CONTROL WIRES TING

CONTROL (A175)

HOLE

A

Maximum length of wiring (18 gauge) for all connections on the RSBus is 1500 feet (457 meters). Wires should be color−coded, with a temperature rating of 95ºF (35ºC) minimum, and solid−core (Class II Rated Wiring). All low voltage wiring must enter unit through provided field−installed busing installed in electrical inlet.

Communicating systems using the icomfortt−enabled thermostat require four thermostat wires between the thermostat and the furnace/air handler con- trol and four wires between the outdoor unit and the furnace/air handler control. When a thermostat cable with more than four wires is used, the extra wires must be properly connected to avoid electrical noise (see illustration below).

Use a wire nut to bundle the four unused wires at each end of the cable. Each bundle should also include an additional wire that should be connected on each end to the C terminal as shown in the figure below.

icomfortt−enabled

icomfortt−enabledIndoor Unit Outdoor Unit

Single Wire To C

Terminal

icomfortt−enabled

thermostat

Single Wire To C Terminal

Unused Wires

Unused Wires

4ROUTE HIGH VOLTAGE AND GROUND WIRES

Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control box. Connect conduit to the control box using a proper conduit fitting.

WATERTIGHT

CONDUIT FITTING

WATERTIGHT FLEX-

IBLE CONDUIT

TO SERVICE

DISCONNECT BOX

GROUND LUG*

CONTACTOR

CONTROL BOX

ELECTRICAL

INLET (HIGH

VOLTAGE)

WIRING ENTRY POINTS

*Attach field−provided green ground wire to provided ground lug.

NOTE − Grounding wire must be a single, contin- uous wire run from unit ground lug to earth ground. DO NOT splice wire.

ELECTRICAL INLET (CONTROL WIRING LOW VOLTAGE). USE BUSHING PROVIDED IN BAG ASSEMBLY HERE.

ACCESS VIEW

FIGURE 13

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Lennox International Inc XC21 3A. Route Control Wires Ting, 4ROUTE High Voltage and Ground Wires, Control A175 Hole
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Dave Lennox Signature Collection XC21 System, XC21 specifications

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