Table of Contents
Advertisement
Quick Links
Installation, Service and
Operating Instructions
for use by heating contractor
Viessmann AirflowPLUS AH2A series
Hydronic forced air handler
Viessmann Airfl owPLUS
5680 011 - 23
07/2021
Product may not be exactly as shown
IMPORTANT
Read and save these instructions
for future reference
.
Please file in Service Binder
Advertisement
Table of Contents
Related Manuals for Viessmann AirflowPLUS
Summary of Contents for Viessmann AirflowPLUS
- Page 1 Installation, Service and Operating Instructions for use by heating contractor Viessmann AirflowPLUS AH2A series Hydronic forced air handler Viessmann Airfl owPLUS Product may not be exactly as shown IMPORTANT Read and save these instructions for future reference Please file in Service Binder...
-
Page 2: Safety
Safety Viessmann AirflowPLUS AH2A Installation, Operating and Service Safety, Installation and Warranty Requirements Please ensure that these instructions are read and understood before commencing installation. Failure to comply with the instructions listed below and details printed in this manual can cause product/property damage, severe personal injury, and/or loss of life. -
Page 3: Table Of Contents
Table of Contents Viessmann AirflowPLUS AH2A Installation, Operating and Service Page Safety 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 General Information About these Installation Instructions......5 Necessary Tools............5... - Page 4 Table of Contents Viessmann AirflowPLUS AH2A Installation, Operating and Service Page Startup Quick Check.............36 Pre-start Checklist.............36 Startup Procedure............37 Air handlers LED Indications for Temperature....37 Installing Connection Board........38 Installing the Access Panels........38 Operation Indicators..............39 Flashing LED............39 Normal Operation............39 Heating mode.............39 Cooling mode............39 Summary............39...
-
Page 5: General Information
General Information Viessmann AirflowPLUS AH2A Installation, Operating and Service About these Installation Instructions Take note of all symbols and notations intended to draw attention to potential hazards or important product information. Indicates an imminently hazardous situation which, WARNING if not avoided, could result in death, serious injury or substantial product/property damage. -
Page 6: Important Regulatory And Installation Requirements
General Information Viessmann AirflowPLUS AH2A Installation, Operating and Service Important Regulatory and Installation Requirements Codes Working on the equipment In Canada all electrical wiring is to be done in accordance The installation, adjustment, service, and maintenance of with the latest edition of CSA C22.1 Part 1 and/or local this air handler must be done by a licensed professional codes. -
Page 7: Product Description
Viessmann AirflowPLUS AH2A Installation, Operating and Service Introduction The Viessmann AirflowPLUS AH2A series air handlers are to be used in conjunction with Viessmann boilers. The automatic adjustments are made in heating as well as cooling. This minimizes selecting an oversized heating appliance just to accommodate the cooling load. -
Page 8: Features
Product Description Viessmann AirflowPLUS AH2A Installation, Operating and Service Features Pump exercise function If the internal circulating pump has not run in the previous 24 hours, the control will turn the pump on for 1 minute to flush the lines and heat exchanger. This will help ensure that the water lubricated pump does not seize during long periods of inactivity. -
Page 9: Equipment Selection And Sizing
Product Description Viessmann AirflowPLUS AH2A Installation, Operating and Service Equipment Selection and Sizing Proper sizing of systems components is crucial for proper operation; 1. Obtain room by room heat loss and/or heat gain 2. Determine heating water temperature 3. Determine duct layout... - Page 10 Product Description Viessmann AirflowPLUS AH2A Installation, Operating and Service Compatibility Charts (continued) Air handler model AH2A-354 Boiler supply water temperature 120°F (44 MBH) 140°F (61 MBH) 160°F (83 MBH) 180°F (98 MBH) Vitodens 100 B1HA-94 Vitodens 100 B1HA-125 ...
- Page 11 Product Description Viessmann AirflowPLUS AH2A Installation, Operating and Service Compatibility Charts (continued) Air handler model AH2A-385 Boiler supply water temperature 120°F (51 MBH) 140°F (74 MBH) 160°F (90 MBH) 180°F (115 MBH) Vitodens 100 B1HA-94 Vitodens 100 B1HA-125 ...
-
Page 12: Installation
Installation Viessmann AirflowPLUS AH2A Installation, Operating and Service Before Set-up Before placing Viessmann AirflowPLUS in its installation CAUTION location, ensure all necessary accessories are installed. The air handler must be installed in such a way that electrical components are protected from water (spraying, splashing, etc.) during operation and service. -
Page 13: Dimensions
Installation Viessmann AirflowPLUS AH2A Installation, Operating and Service Dimensions IMPORTANT AH2A-213 AH2A-354 AH2A-385 The maximum ambient temperature must not exceed (mm) (584 mm) (711 mm) (578 mm) 104ºF (40ºC). (mm) (457 mm) (559 mm) (559 mm) (mm) (826 mm) (876 mm) -
Page 14: Heating Circuit Pumps
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... -
Page 15: Installation Examples
Installation Viessmann AirflowPLUS AH2A Installation, Operating and Service Installation Examples Horizontal installation IMPORTANT A field fabricated auxiliary drain pan with drain pipe is Supply air recommended in all configurations. Suspension material (field supplied) Return air Secure the suspension material to the corners of the air handler housing. -
Page 16: Vertical Installation
Vertical installation The A/C coil is installed in the upstream air flow of the Viessmann AirflowPLUS air handler. This will require the use of the remote return air temperature sensor mounted upstream of the A/C coil. See page 27 for additional information regarding the remote return air temperature sensor. -
Page 17: Proper Piping Practice
Installation Viessmann AirflowPLUS AH2A Installation, Operating and Service Installation Examples (continued) Vertical installation IMPORTANT The A/C coil is installed in the downflow position of the A field fabricated auxiliary drain pan with drain pipe is Viessmann AirflowPLUS air handler. required in all configurations. -
Page 18: Removing The Blower Shipping Bracket
Installation Viessmann AirflowPLUS AH2A Installation, Operating and Service Removing the Blower Shipping Bracket 1. Remove the bracket retaining thumb screws and discard. 2. Remove the bracket and discard. Opening the Air Handler Unit 1. Remove the lower front panel retaining screws and set aside. -
Page 19: Panels
Installation Viessmann AirflowPLUS AH2A Installation, Operating and Service Panels There are 2 return air openings on the air handler. One is located on the left side for vertical installations and one is located at the bottom for horizontal installations. For horizontal installations, remove the bottom panel and install it to the left side panel opening. - Page 20 Installation Viessmann AirflowPLUS AH2A Installation, Operating and Service Panels (continued) To change the duct connection side of the air handler for vertical installation, the right and left side panel can be interchanged. To interchange the panels refer to the following instructions.