Checkout Procedure - PENN Controls - A19BAC - A28AA - Electromechanical Temperature Control - A19 Coiled Bulb Control - A28 and A36 Multi‐Stage Temperature Control

A19BAC, A28AA Single and Two-Stage Space Thermostats for Farm and General Purpose Applications Installation Guide

Brand
PENN Controls
Product name
A19 Coiled Bulb Control
A28 and A36 Multi‐Stage Temperature Control
Document type
Installation Guide
Part number
996-238
Document revision
F
Revision date
2019-03-07
Language
English

Before leaving the installation, observe at least three complete operating cycles to be sure that all components are functioning correctly.

Check for correct operation in the following manner.

  1. A19BAC -- Ventilating or Cooling: Turn dial clockwise to a setting above space temperature. Fan or cooling system should be off. When you turn the dial counterclockwise, the fan or cooling system should turn on approximately at the dial setting.

    A19BAC -- Heating: Turn dial clockwise above the space temperature; the heating unit should be on. When you turn the dial counterclockwise, the heating unit should turn off approximately at the dial setting.

  2. A28AA -- If wiring is similar to Figure 5, fan should start at approximately space temperature and should change to high speed as the dial is turned counter clockwise to a lower temperature setting.

    If similar to Figure 6, the damper should open as the dial is turned counterclockwise. The devices should act in reverse sequence when the dial is turned clockwise to a higher setting.

  3. If control devices do not operate in the manner described above, check all wiring for short circuits and tightness of wiring connections. If controlled devices operate in reverse (start in high or fully open position), check wiring.