Danfoss Duct System Installation guide
MAKING MODERN LIVING POSSIBLE
Installation Guide
Duct System
for Danfoss Air Units
www.heating.danfoss.com
Danfoss A/S is not liable or bound by warranty if these instructions are not adhered to during installation or service.
The English language is used for the original instructions. Other languages are a translation of the original instructions. (Directive 2006/42/EC)
© 2011 Copyright Danfoss A/S
Installation Guide |
Duct System |
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1 |
Installing Valves |
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Placing the valves
Start by deciding on the location of the valves, using the enclosed technical drawing as a guideline. If the drawing indicates a valve in the path of e.g. electrical wiring, water ducts or wooden joists, the fvalves can of course be moved. 
Mounting the valves
Fix the valve bayonet socket to the ceiling. For gypsum ceilings, place a wooden plate on the back for the screws to bite into.
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If the duct needs to pass through insulation, we recommend measuring the insulation section and installing a duct section along a suitable length of the bayonet socket (VGU or VGM). Use a NPU connection nipple to connect the VGM and the duct section.
Avoid placing air diffusion valves above places where people may be located for long periods, such as sofa, bed, dining table, etc. If a wood-burning stove is present, it is best to place the air diffusion valve nearby.
The extraction valves are meant to remove moist ”contaminated” air. They should therefore be placed as close as possible to the source, e.g. above washbasins, in shower cabinets, etc.
Drilling holes in the ceiling
A hollow drill should be used for making the holes for the valves.
Use the following drill sizes:
▪Ø 100 mm valves: hollow drill Ø 108 mm.
▪Ø 125 mm valves: hollow drill Ø 133 mm.
Avoid damaging the damp course unnecessarily and always remember to repair it with weatherproof tape from the ceiling side afterwards.
The size and shape of the valves varies depending on the air direction and volume.
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Supply air valve |
Extract air valve |
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Danfoss Heating Solutions |
VIFYB102 |
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3 |
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