silavent Green Line HRX2 Series, Installation And Operating Instructions Manual

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LAB939R, Issue 2, July 2014 Page 6
1.2 Physical specification
net weight 20kg
1.3 Optional main features
1.3.1 Summer bypass (HRX2-B, HRX2-BFP models)
The models listed above will be supplied with an additional Winter/Summer switch (see
highlighted option boxes on the appliance cardboard cover). When the switch is set to
summer, the fresh air is no longer pre-warmed by the heat in the outgoing stale air.
Important: when the switch is set to summer, both fans will stop for 45 seconds to allow the
bypass diverter valve to open.
1.3.2 Frost protection (HRX2-FP, HRX2-BFP models)
The models listed above are supplied with an automatic frost protection system. During
periods of very cold weather, the fresh air supply fan will automatically turn off to reduce the
load on your heating system and avoid possible freezing of the heat exchanger. During these
periods, the extract fan will speed up slightly to maintain an even air pressure. See also
section 2.3.