Testing The Lwco Function - IBC CX Series Installation And Operating Manual

Fuel
Range %
Natural Gas
9.0 - 10.0
Propane
10.3 - 11.3
Table 10 Combustion test target ranges - CO

6.3.4 Testing the LWCO function

The low water cutoff (LWCO) function provides continuous protection against low water in the
boiler. If the SIM detects low water, the boiler enters a lockout state. Perform the test to ensure
that the LWCO sensor is functioning.
1. Go to Status
2. After the test, on the touchscreen controller, select the Reset button.
The message: "The SIM Module has been reset" is displayed.
3. Tap Close > Back to exit the test.
High fire
Target %
9.5
10.8
/ Maximum CO
2
> SIM Menu > LWCO Test > Read the instructions.
82
Section: Boiler operation
Low fire
Range % Target %
8.2 - 9.2 8.7
9.3 -10.3 9.8
CO max
PPM
<150
< 250