Testing The Hi-Limit Cutoff Temperature Function - IBC VX Series Installation & Operating Manual

6.3.5 Testing the Hi-Limit cutoff temperature function

The hi-limit temperature function monitors the maximum supply temperature set in the safety ignition
module (SIM). If the water temperature exceeds the hi-limit temperature, the boiler goes into a lockout
condition, requiring a manual reset. Perform the test to ensure that the water temperature sensor is
functioning.
To test the Hi-limit temperature function:
1. Go to
> SIM Menu > Hi-Limit Test > Read the instructions.
You will need to enter a cutoff temperature below the actual supply temperature value currently
displayed. For example, if the Supply Temp. value is 180°F, enter 170°F in the Cut Off Temp.
box.
2. In the Cut-Off Temp. field, enter a number value > OK.
The message: "Hi-Limit Detected" is displayed.
3. To reset the boiler, select the Reset button. The cutoff value reverts to normal upon reset.
The message: "The SIM module has been reset" is displayed.
4. Tap Close > Back to exit the test.
6.3.5 Testing the Hi-Limit cutoff temperature function
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