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VR 250 ECH/B
Installation description
206609 (17-09-2010)
9
Systemair
AB
GB
1.
Inlet diffuser (ceiling mounted)
2.
Extract diffuser/air valve
3.
Flexible silencer with frame
Fig.7
Setting airflow
For basic setting of inlet diffusers, open core of the diffuser 5-7 turns from closed position. Lock by means
of centre nut. For basic setting of extract louvers, open core of the diffuser 10 turns from closed position.
Lock by means of centre nut. For adjustment of air volumes to each separate room, setting on
diffusers/louvers are to be made in accordance with calculations made during designing of the ventilation
system or during commissioning of the system (special measuring equipment required).
Air circulation between rooms
To obtain a satisfactory air circulation, a small gap should exist around the doors between rooms with inlet
diffusers (living rooms and bedrooms) and rooms with extract points (bathroom, WC, kitchen, laundry
rooms etc.)
(fig.8)
. Install doors with slots in the frame, doors without door sill or slots/vents in doors/walls
(min. 70 cm
2
free area per extract diffuser).
Fireplace, kitchen ventilator, tumble dryer etc.
Balanced ventilation is obtained where the VR 250 ECH/B is installed. There will normally be no under
pressure in the building, and therefore no risk for back draught from fireplace or chimney
(fig. 9)
.
An open fireplace requires an air supply of 150 - 300 m
3
/h (42 - 84 l/s) for maximum functionality and
efficiency. This equals 300 cm
2
ventilation slots per fireplace. Supply air duct directly to the fireplace would
be the optimal solution, but 2 pieces 16x16 cm closing vents in outer wall is a good alternative.
Fig. 8
Fig. 9
When cooker hood is connected to the VR 250 ECH/B, the airflow will automatically be increased when
kitchen extract is in use. A minor under pressure in the building could occur. This can be solved by slightly
opening a window or by leaving a vent in the wall open while cooking.
Ø125 mm
Ø100/125/160 mm
Ø100 mm
Ø100/Ø125 mm
Summary of Contents for VR 250 ECH/B
Page 1: ...10 04 17 09 2010 VR 250 ECH B Air Handling Unit Installation description GB GB...
Page 15: ...10 04 2010 09 17 VR 250 ECH B Luftbehandlingsaggregat Installationsbeskrivning GB SE...
Page 29: ...10 04 17 09 2010 VR 250 ECH B Ventilasjonsaggregat Montasjeanvisning NO...
Page 43: ...10 04 17 09 2010 VR 250 ECH B L ftungsger t Installationsanweisung DE...
