9.3 Calibrating the fan
After replacing a fan or performing a software update, fan calibration is required.
1. Remove all calls for heat by pulling out the entire TB2 terminal block (see Figure 12 ).
2. Go to > System Settings > Restart Boiler.
3. Tap Yes to "Restart the boiler".
4. Tap Yes to "Run the Fan Pressure Calibration on restart?".
A red bar appears across the bottom of the display and the boiler turns off, then restarts. During
calibration the status will display Offline. When the status returns to Standby, calibration is
complete.
5. Restore the calls for heat by reinserting TB2 terminal block.
6. Open the manual gas valve, and restore power to the boiler.
7. Check for leaks at the gas valve outlet and at the connection between the fan and heat
exchanger lid.
8. Confirm normal operation and install the cover to the boiler.
9.4 Performing a manual pump purge
After installing a boiler, you will need to perform a manual pump purge to ensure that air is fully
removed from the piping circuit.
1. After defining loads, go to > System Settings > Site Settings > In the Manual Pump
Purge field, set to "On" . The manual pump purge runs until it is turned off, or when there is a
call for heat.
2. To shut off the manual pump purge, tap "On" to toggle to "Off".
9.5 Limiting the minimum and maximum firing rate of the
boiler
If a boiler is oversized for the specific installation, you can lower the maximum firing output. Or, if a
boiler is not able to stay operational at its lowest btu due to a high wind environment, you can raise the
minimum firing rate output.
To adjust the minimum or maximum firing range on a boiler:
1. Go to > Installer Options > On the number pad, enter the default password 1445 > OK.
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