Viessmann AirflowPLUS AH2A Installation, Operating and Service
5680 011 -10
4
Startup
Operation
Service
Additional Information
Page
Quick Check
.............................................................35
Pre-start Checklist
.....................................................35
Startup Procedure
....................................................36
Air handlers LED Indications for Temperature
...............36
Closing the Air Handling Unit
.....................................37
Indicators
................................................................38
Flashing LED
............................................................38
Normal Operation..
....................................................38
Heating
mode.....................................................38
Cooling
mode......................................................38
Summary............................................................38
External Heat Demand via Switching Contact -
Boilers equipped with HO1B User Interface
..................39
Heating System Operation - Vitodens 100 WB1B
..........39
DHW Contact for Air Handler - Vitodens 100 WB1B
......40
Illuminated Alarm Indicator
.........................................41
Home
freeze
protect............................................41
Heat
exchanger
freezing protection control.............41
Cooling
lockout...................................................41
Temperature sensor failure....................................41
Audible Alarm Indicator
.............................................41
Alarm Relay and LED Fault Codes
..............................42
Control
LED flash codes.......................................42
Alarm.................................................................42
Checking ECM (DC) Fan Motor Connections
.................43
Troubleshooting
.......................................................44
Service and Maintenance
...........................................48
Checking
temperature
sensor................................48
Installed
sensors..................................................48
Failed
sensors......................................................48
Air
filter..............................................................48
Circulator...........................................................48
Coils..................................................................48
System Layout 1
......................................................49
System Layout 2
......................................................50
System Layout 3
......................................................51
System Layout 4
......................................................52
System Layout 5
......................................................53
System Layout 6
......................................................54
System Layout 7
......................................................55
System Layout 8
......................................................56
Technical Data
.........................................................57
Electrical Connectors
.................................................58
Parts List
.................................................................60
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