Unit installation

August 2012 Application Note 1024

P a g e | 3

Supplemental Heat Control via CN-24 for PLA, PCA and SLZ Indoor Units

CN-24 controls are indicated in Figure 1and require no setup at the remote controller.

This function is only available in heating operation.

Figure 1. CN-24 controls

Figure 2 illustrates a typical wiring diagram for PLA, PCA and SLZ indoor units using

CN-24:

Figure 2. Wiring Diagram for PLA, PCA and SLZ Indoor Units using CN-24

Supplemental Heat Control via CN-24 for PEA (D) and SEZ Indoor Units

CN-24 controls are indicated in Figure 1 and require no setup at the remote controller.

This function is only available in heating operation. This default operation is highly

recommended.

If desired, the dead-band to energize supplemental heat can be tightened to 1.8° F via

remote controller settings. Note: This setting will result in the supplemental heat always

being energized any time the indoor unit is actively heating. Via the MHK1 Wireless

Remote Controller, enter the Installer Setup Menu and select Setup Function 123 and

select setting #2; From the PAR-21MAAU Wired Remote Controller select mode 23 and

select setting #2. (Controller manuals currently do not label this action for this function).

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

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

APP-77