Thermostat User Manual

Before Beginning

You can avoid most problems by following the recommended installation and

maintenance procedures outlined in this User Guide. If you do have a problem,

this section will help you determine what caused it and how to fix it.

Before you start disassembling the HTC process air heater be sure to:

❏ Diagnose causes from the control panel.

1 Press the Acknowledge Alarm button to silence the alarm.

2 Address the alarm message and fix the problem.

3 Move the heater switch from Enable to Standby.

4 Cycle the heater switch from Standby to Enable to restart normal con-

trol. If the alarm reappears the problem was not fixed.

If the alarm is a passive alarm

you will see P in the screen title display.

If the alarm is a shut down alarm you will see A in the screen title

display.

❏ Diagnose causes from the control panel.

You can locate any problem from the front of the heater.

Heaters

Startup /

Shutdown

For Startup:

1. With heaters in

Standby, turn on

blower or dryer.

2. Enable heaters.



For Shutdown:

1. Switch heaters to

Standby. 

2. Wait 60 seconds

before turning off

blower or dryer.

Enable

Standby

Acknowledge

Alarm Button

Scroll

Button

6-2 l

roubleshooting