17
ALNOR
®
ventilation systems
is a legally protected trademark and technical patent. All rights reserved.
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User Manual
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When the units are installed in pair, they must be synchronised so that when one unit is extracting, the other
is supplying, and viceversa.
This is achieved by setting the dedicated jumper (Fig. 20A-20B). One unit is set in A position, other in B
position. Units which are supposed to work in synchronisation mode can be connected to a single HRU-WALL-
CONTR / HRU-WALL-CONTR-I controller. One can connect up to 10 units to a single controller.
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OPTION 1
: If two or more units are connected under the same main switch, to reset the synchronisation, the
main switch must be switched first OFF and then ON to reactivate (Fig. 34).
OPTION 2
: If two or more units are not connected under the same main switch, to reset the synchronisation,
press at the same time the black pin of each unit (Fig. 36) for at least 3 seconds.
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Integral jumper set in position A (Fig. 20A) means “extract-only” mode.
Integral jumper set in position B (Fig. 20B) means “supply-only” mode.
The jumper position defines both the air-flow direction when the unit is activated for the first time (for the
synchronisation) and the air-flow direction of the free-cooling mode.
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Maintenance can be carried out by the user as indicated at page 22.
Service must be perfmormed only by technically qualified personnel in accordance with local rules and
regulations. Make sure that the mains supply to the unit is disconnected (page 23).
Cleaning of the heat exchanger can be performed from outside as well.
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Information on disposal of units at the end of life. This product complies with EU
Directive 2002/96/EC. The symbol of the crossed-out dustbin indicates that this
product must be collected separately from other waste at the end of its life. The user
must, therefore, dispose of the product in question at suitable electronic and electro-
technical waste disposal collection centres, or else send the product back to the retailer
when purchasing a new, equivalent type device.
Separate collection of decommissioned equipment for recycling, treatment and
environmentally compatible disposal helps to prevent negative effects on the
environment and on health and promotes the recycling of the materials that make up
the equipment.
Improper disposal of the product by the user may result in administrative sanctions as
provided by law.
