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Installation
Heating Circuit Pumps
Legend
A Speed 1 Pump curve
B Speed 2 Pump curve
C Speed 3 Pump curve
Note: All Viessmann AirflowPLUS air handlers come with
pump speed factory set to speed 3.
Installation
The contractor shall adhere to all local, state and national
code requirements pertaining to the installation of this
equipment.
The Viessmann AirflowPLUS AH2A series air handler
can be mounted in most directions. Upflow, downflow,
horizontal left and horizontal right. You cannot install the
air handler on it's back or suspended with front cover
facing down. An adequately sized drain pan and drain
connection must be installed under the appliance
if installed in or above a finished space.
If installed in an unfinished space, a drain pan is not
provided, necessary precautions must taken to ensure
proper drainage of water in the event of a water leak
(e.g. Floor drain, sump pump, moisture alarm...). This
appliance shall not be installed in a non conditioned space
where the potential may exist for the appliance and or
water lines and drain line to freeze.
14
Viessmann AirflowPLUS AH2A Installation, Operating and Service
Pump Model
Rated voltage
Rated current
Capacitor
Power consumption
The Viessmann AirflowPLUS AH2A can be suspended
by securing straps to the corners of the enclosure (field
supplied).
Install the air handler with the door screwed in place to
avoid distortion of the cabinet. The installing contractor
must ensure that suspension materials are sized and
installed to provide sufficient support to the air handler
and connected accessory fittings and materials.
Note: System layout examples are provided starting on
page 50 of these instructions.
Grundfos UPS15-58RU
VAC
Amp
F
Watts
115
0.74
10
87
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