Unit installation

August 2012 Application Note 1024

P a g e | 2

The P-Series, SEZ and SLZ indoor units, when installed with MXZ, PUZ or SUZ heat

pump outdoor units, can interface and enable supplemental and auxiliary heat sources

using an indoor board connector (CN-24 or CN-152, depending on indoor unit). For

indoor units connected to PUY outdoor units, external heat control does not function.

(Please note that at this time M-Series indoor units (MS/MSZ/MFZ) do NOT support any

supplemental heat control or interface capabilities. If supplemental heat control is

required, please provide alternate options).

Supplemental or auxiliary heat should be sized and selected by the contractor or

engineer to provide the necessary capacity to maintain expected comfort in all

reasonable low temperature conditions. Any heat source must also be equipped with all

required control, safety, and operational devices needed for proper and safe operation.

Check your local, state, and federal codes.

Table 1 summarizes which style of indoor unit has either a CN-24 or CN-152 connector

to interface with supplemental heat sources.

Table 1. Indoor Unit Models Requiring CN-24 or CN-152 Connector

Applicable Indoor Unit Model

Connector

Requires Part #

PLA-A**BA4 (Ceiling-recessed)

PCA-A**KA4 (Ceiling-suspended)

SLZ-KA**NA (Ceiling-recessed)

PEA(D)-A**AA4 (Ducted)

SEZ-KD**NA4 (Ducted)

CN-24

CN24-Relay-Kit-CM3 which includes:

 Connector with wiring lead

o Colored wires with spade

connectors

o Kit covers both sizes of CN-

24 plugs

 12 VDC Relay

 CN22/CN4Y fan speed jumper

PKA-A**HA4 and PKA-A**KA4

(Wall Mounted)

CN-152

PAC-SE59RA-E which includes:

 Connector with wiring lead

 Box contains connector for CN-

152 which is a 10-pin Molex type

with a 2m 2-conductor wire

attached to pins 1 & 2

Also need CN24-Relay-Kit-CM3

Due to continuing improvement, above specification may be subject to change without notice.

2013 P-Series and M-Series - Application Notes (June 2013)

APP-76