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filters
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27.09.2017
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Place for G4 filter (standard) or
F7 filter (optionall) - supply side
Place for: M5 filter -
supply side (optional)
Place for: M5 filter -
extract side (optional)
Place for G4 filter (standard) or
F7 filter (optionall) - extract side
ALNOR
®
ventilation systems
is a legally protected trademark and technical patent. All rights reserved.
74
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User Manual
HRU-PremAIR
6.6 Emergency stop
The emergency stop becomes active when all following conditions are true:
• The emergency stop is not blocked
• T
supply
< +5˚C (Emergency stop temperature #20.)
NOTE:
The emergency stop can only be cleared by a power down. (power cut off).
6.7 Auto return to auto mode
Parameter Auto return to auto mode (#60) is normally disabled. If you enable this option (only by authorized
service personnel), unit returns to auto mode automatically after set value.
NOTE:
Auto mode works only when you have minimum one VMS sensor (CO
2
or RH) paired with HRU.
6.8 Filters
Unit comes from the factory equipped with two filters: G4 class filter on supply side and G4 class filter on
extract side. It is possible to have also M5 or F7 filter on exhaust side and M5 or F7 filter on supply side as an
additional equipment.
NOTE:
Please remember that additional filters increase pressure drop in all ventilation system.
Figure 27 - places for filters (view without front cover)
