IBC AHU Series, Installation & Operating Manual, Page: 4 / 75

2.4.2 Using Propylene Glycol 30
2.5 Connecting the appliance to a tankless water heater 30
2.6 Electrical connections 32
2.6.1 Wiring of the external pump and 120VAC line 33
2.6.2 Connecting line voltage - examples for different scenarios 33
3.0 Operation 45
3.1 Checklist for electrical conditions, ducting and water connections 45
3.2 Default settings 46
3.3 Default fan speed settings 46
3.4 Sequence of operation 47
3.4.1 Heating Mode 47
3.4.2 Cooling Mode 47
3.4.3 Heat Pump Mode 47
3.4.4 Humidification Mode 48
3.4.5 De-humidification Mode 48
3.4.6 Freeze Protection Mode 48
3.5 LED status indicators 49
Built-in diagnostics feature 49
3.6 Operating the appliance with a mobile app 50
3.6.1 Loading IBCconnect 50
3.6.2 Using the app to connect to IBC's AHU WiFi 51
3.6.3 Programming the air handling unit using the app 53
3.6.4 Using the app to view the AHU's information 55
3.7 Configuring settings and parameters via a USB text file 57
4.0 Service and maintenance 59
4.1 Maintenance checklist for owners 59
4.2 Maintenance for the heating contractor 59
4.2.1 Removing the fan assembly 59
4.2.2 Replacing the hot water coil appliance 61
4.3 Replacing the control board 62
4.4 Temperature sensors 64
5.0 Troubleshooting 67
5.1 Measuring voltage on AHU boards 67
5.2 Pump not energized 67
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Section: Contents