Duct System for Danfoss Air Units

Transcription

1 MAKING MODERN LIVING POSSIBLE Installation Guide for Danfoss Air Units

2 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

3 1 Installing Valves 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 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. Supply air valve Extract air valve Danfoss Heating Solutions VIFYB102 3

4 2 Installing Ducts To achieve the highest operational efficiency, the duct system should be installed as compact as the building construction allows by keeping the duct sections as short as possible and using as few bends as possible. If the ducts are located on the loft floor, they can be secured using duct clips. Always use appropriate protective equipment (i.e. protective goggles, ear defenders, etc.). Connecting the duct system Push the connector into the duct, until the stopsick is reached (slightly turning the connector will make the assembly easier). ❶ ❶ Duct clip Duct clips can also be used if the duct system is suspended from the roof, using UV fixing hangers, if required. T-connector Fix the connectors to the duct with at least two self-tapping screws or pop rivets (three for ducts of Ø140 mm or more). Make sure that the safe rubber strips are not damaged. In case of incorrect assembly, screw/pop rivet holes should be sealed up. Assembling T-connector and ducts Example of duct installations The standard length of ducts is 3 metres. To connect two ducts, use an NPU nipple with a rubber strip. Note! the ducts must not rest on the valves or hang in the roof terminals. place a soft material between the duct and the rafters/duct clip to avoid vibration noise. avoid installing damaged products (e.g.dented ducts), as this may reduce the performance of the system and can result in leaks. the ducts should be placed in the insulation, in order to minimise heat loss (see page 5 "Insulating the "). NPU nipple To reduce a branch, use a TCPU T-section. To reduce the main duct, use a RCFU reduction. Ø 100 Adjusting the ducts Use a hacksaw or angle grinder to adjust the ducts. Remove all sharp edges on the duct to avoid damaging the rubber seals on the fitting parts. Ø 125 TCPU RCFU Ø 100 Adjusting duct length 4 VIFYB102 Danfoss Heating Solutions

5 Crossing ducts If two ducts need to cross, we recommend installing the duct that runs along the beam underneath the duct crossing it to reduce heat loss If a preheating or geothermal surface is present, the fresh air intake must as minimum be covered by 100 mm of insulation. 50 mm of insulation is adequate for sound dampers, as they already have 50 mm of insulation. Make sure that the insulation is fixed tightly around the ducts. 30 Crossing ducts To get your duct down into the insulation as quickly as possible, we recommend the solution illustrated Connection to unit (side view) SR SLU SR BU Connection to unit (top view) Incorrect insulation If possible, the ducts can be run in or under the attic insulation. Connection between ducts and unit It is important that all 4 flanges are connected to the ducts with a flexible connection, so that potential vibrations are not transferred from the unit to the ducts system. Ducts in attic insulation If steel wire is used to fasten the insulation, make sure that the insulation is not deformed or broken by the wire. Note! The above should be considered as recommendations only. Always follow any country-specific regulations. Avoid bending the flex pipe as this will add to an increased pressure loss in the system. When mounting, the flex pipe should be stretched as far as possible without deforming the pipe. It is recommended to use an insulated flex pipe type THISOL. Mount hose clamps around the outer layer of plastic in order to ensure air tightness. Insulating the duct system It is important that the duct system is insulated correctly. The supply and the extract must as minimum be covered by 100 mm of insulation. It is recommended to use two layers of 50 mm paper or foil covered lamella mat mounted with staggered joints. Sound Damping Sound damping the duct system is a very important element in achieving the general feeling that you have the perfect indoor climate. The noise in a ventilation system comes primarily from the unit s ventilators. This noise can be propagated throughout the duct system and out into individual rooms unless there is proper sound damping. It is therefore also very important that silencers are positioned correctly in the duct system. There are several methods of sound damping, e.g.: The silencer positioned directly after the unit, before the main duct branches out (sound damper effective on entire system). Insulation of ducts The fresh air intake and the exhaust must as minimum be covered by 30 mm of insulation to protect against condensation. Two silencers positioned on each side of thet-section, before branching to a room. Danfoss Heating Solutions VIFYB102 5

6 + Installation Guide As well as damping the noise from the ventilators, it is important to ensure that noise does not propagate from room to room, i.e. where noise runs through the ventilation ducts from room to room. To avoid this, install a small silencer on the branch to the rooms that you want to damp. For room-to-room sound damping, use SLU and SLU , depending on the dimension of the branch. We also recommend using Lindab SBG installation fittings and a Lindab MG membrane duct for a correct finish against the subroof. 3 m Roof Terminals Roof terminals/wall grills and roof ducts are the outside visible part of the ventilation system. If possible, they should therefore be adapted to the architectural style of the house. The roof terminals should be placed at least 3 metres apart horizontally or 1 metre apart vertically, always with the discharge terminal at the top. Avoid positioning the discharge lower than the top edge of the top window and closer than 1 metre to the nearest window. It is recommended to place terminals/grills on a north- or east-facing surface to achieve the best and most comfortable operation of the system. If the roof terminal is installed on a tiled roof, we recommend using a pre-insulated Lindab GISOL roof duct. 3 m 1 m 3 Adjusting Valves The following are guideline settings only. Adjusting Supply Valves Start by fully closing the valve (not too tight!). Then open the valve the number of times indicated in the diagram, which is provided with the assembly drawing of the ducts system. Rotate the cone the number of times indicated in the diagram: + 5 = anti-clockwise 5 times 5 = clockwise 5 times anti-clockwise clockwise Pos. Adjusting Extract Valves Start by setting the valve to position 0, which in practice means opening the central cone so the middle of the cone is in line with the frame. + Pos. 6 VIFYB102 Danfoss Heating Solutions

7 Danfoss Heating Solutions VIFYB102 7

8 Danfoss A/S Heating Solutions Haarupvaenget Silkeborg Denmark Phone: Fax: Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss Heating Solutions and the Danfoss Heating Solutions logotype are trademarks of Danfoss A/S. All rights reserved. VIFYB102 Produced by Danfoss Heating Solutions 11/2011