6.0 Start-up
Note
For a boiler to fire, it needs an "enabler" across the load such as a zone valve end switch,
thermostat switch, or jumper.
When a boiler is first energized, the controller runs through a power-up sequence that takes
approximately one minute. During this time, the controller completes a self-diagnostic, and loads all
previous settings. When power is restored after a power interruption, the boiler automatically resumes
operation with all the previously stored values.
If commissioning a boiler with a new (replacement controller), see Programming a replacement
touchscreen controller on page 78.
6.1 Start-up checklist
Start-up Checklist Check
Measured the inlet gas pressure. Refer to the boiler's Installation and Operating Instructions
manual.
□
Tested the flue gas (combustion test). Refer to the boiler's Installation and Operating
Instructions manual.
□
Tested the ignition system safety shutoff device. For instructions, see Testing the ignition
safety shutoff on page 62.
□
Tested the Hi Limit cutoff temperature functionality to ensure the sensor is working. For
instructions, see Testing the Hi-limit temperature function on page 62.
□
Tested the low water cutoff functionality to ensure that the sensor is working. For
instructions, see Testing the low water cutoff (LWCO) function on page 62.
□
Tested the pressure relief valve. For instructions, refer to the Installation and Operating
Instructions manual "Service and maintenance: Relief valve" section.
□
Checked that the exhaust pipe clamp is tight and secure (no leaking flue into the room).
Refer to the Installation and Operating Instructions manual "Installation: Exhaust vent
material" section.
□
Tested the flow by observing the supply and return delta temperature.
□
Verified that the correct pump is activated by the corresponding call for heat.
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