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Viessmann AirflowPLUS AH2A Installation, Operating and Service
Safety, Installation and Warranty Requirements..............2
Product documentation...........................................2
Warranty...............................................................2
Licensed professional heating contractor...................2
Advice to owner....................................................2
Operating and service documentation.......................2
Fiberglass wool materials........................................2
First aid measures..................................................2
About these Installation Instructions..............................5
Necessary Tools.........................................................5
Codes..................................................................6
Instructing the system user...................................6
Initial start-up........................................................6
Working on the equipment......................................6
Technical literature................................................6
Introduction...............................................................7
Components................................................................7
Features......................................................................8
Equipment Selection and Sizing.....................................9
Compatibility Charts.....................................................9
Before Set-up..............................................................11
Minimum Clearances...................................................11
Dimensions.............................................................12
Heating Circuit Pumps.............................................13
Installation...............................................................13
Installation Examples.................................................14
Horizontal installation...........................................14
Vertical installation..............................................15
Proper Piping Practice................................................16
Connecting to the Heating System..............................16
Removing the Blower Shipping Bracket.......................17
Opening the Air Handling Unit....................................17
Panels.....................................................................18
Accessing the Connection Board................................21
Vitodens 100 WB1B Wiring.......................................22
Vitodens 100 B1HA/B1KA Wiring...............................23
Vitodens 100 WB1B Wiring using DHW Connection.....24
HO1B Wiring............................................................25
Control Function.......................................................26
Supply Water Temperature (T1).................................26
Freeze Protection Temperature (T3)............................26
A/C Discharge Air Temperature (T4)...........................26
Remote Return Air Sensor (T5)..................................27
Ambient Sensor (T6).................................................27
Sensor Locations......................................................27
S1 Dip Switch Settings.............................................28
Door Safety Switch..................................................29
Electrical.................................................................30
Thermostat.........................................................30
Power Supply...........................................................31
Control Inputs.........................................................32
Setting Fan Speed....................................................33
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