Wiring - PENN Controls - A19CAC - Electromechanical Temperature Control - A19 Control for Hot Water Immersion

A19CAC Type Automatic Changeover Control Installation Guide

Product
Controls > Hot Water Controls > A19 Control for Hot Water Immersion
Document type
Installation Guide
Document revision
J
Revision date
2023-10-18
docpartnumberlabel
Part No.
Part number
997-361

The terminals on the SPDT switch are color-coded. The red terminal is the common, the blue terminal opens on a temperature increase, and the yellow terminal closes on a temperature increase. See Figure 2 and Figure 3 for standard wiring.

Figure 1. Switch terminals and screws
Callout Description
1 Adjustment screw
2 Clamp screw
Y Yellow terminal
B Blue terminal
R Red terminal, common
Figure 2. A19 Series switch action for single-pole, double-throw (SPDT)

Note: The red (R) to yellow (Y) contact closes when hot water circulates. The red to blue (B) contact closes when cold water circulates.

Make all wiring connections with copper conductors only, and in accordance with the local, national, and regional regulations.

Important: Use the terminal screws furnished (8-32 x 1/4 in. binder head). Substitution of other screws could cause problems in making correct connections.
Figure 3. Wiring diagram for a standard heating and cooling circuit
Callout Description
1 A19 control
2 Line voltage heating and cooling thermostat
3 Speed control, if used
4 Fan motor