Specifications

TW-1 and TW-2 Thermolators provide a Test Mode that tests
displays and keys on the control panel, as well as inputs and
outputs. The Test Mode also allows calibration of the supply
and return line thermocouples.
System tests and calibration should be performed annually.
To enable Test Mode:
Press to shut down the Thermolator.
Disconnect and lock out main power to the unit,
then open the electrical enclosure.
Set dip switches 3 and
5 to OFF.
Set dip switch 6 to ON.
Close the electrical enclosure and restore
power to the unit.
◆ The control displays “tSt.”
◆ The Test Mode LED lights.
Press any button to display the first test menu.
Test mode provides the following menus:
● Key/Display Test
● Input Test
● Output Test
● Calibration
● Total Operating Hours
● Output Monitor Enable/Disable
After performing each test, hold the Setpoint
for 3 seconds to index to the next test menu.
The procedure for each test is described on the following
pages.
P
ERFORMING
S
YSTEM TESTS
UGH015/0100 Thermolator TW-1 and TW-2
MAINTENANCE 5-5
Stop
876
54
3
21
1
2
3
4
5
6
7
IMPORTANT: All normal
operating functions are
disabled while Test Mode is
enabled. To return to normal
operation, you must disable
Test Mode.
To disable Test Mode,
repeat steps 2 through 5,
setting dip switch 6 to OFF
instead of ON.