Component position and description cont'd
Position
Description
FIPdT
Filter air pressure sensor
ABHS
Apartment building heating system
3.2 General description
The Living HR is extract air ventilation unit for apartment buildings that have integrated heating system with
the heat pump. The Living HR unit should be integrated into extract air ventilation system of the building
and the brine coil, which is used for heat recovery, should be connected to the heat pump cooling side.
The Living HR is also designed to control fire/smoke fan during normal operation.
The stops and starts of the unit are based on signals from the heat pump in apartment building.
The Living HR unit can work in two modes: summer and winter.
3.2.1 Summer/Winter modes
Summer mode: when requirements are met to stop the heat pump in apartment building, a signal is sent to
deactivate the Living HR unit. Dampers A and C are closed. Another signal is sent to open fire/smoke
damper B and to start fire/smoke fan in order for waste air from the residence to be vented outside.
In summer mode heat recovery is not possible.
Winter mode: when requirements are met to start the heat pump in apartment building, a signal is sent to
stop fire/smoke fan, fire/smoke damper B will be closed. Another signal is sent to activate the Living HR
unit. Dampers A and C are open, air travels through the unit. The heat recovery is fully operational.
3.2.2 Fire function
Fire function is activated by smoke and fire sensor. The sensor must be mounted in the duct before
fire/smoke damper B. Fire function is used to protect the Living HR unit from smoke and heat in case of
fire emergency. If smoke is detected in winter mode the unit is stopped, dampers A and C are closed.
Signal is sent to open smoke fan damper B and to start smoke fan at full capacity immediately in order
to extract smoke from the residence.
In the summer mode if fire/smoke alarm is activated, the fire/smoke fan from regulation mode will be
immediately switched to full capacity. In normal conditions the speed of fire/smoke fan is controlled by the
unit based on differential pressure in extract air duct.
3.3 Components and function
3.3.1 Brine coil
The brine coil is made of copper tubes with aluminium fins and is used to absorb heat from extract air. The
brine coil is filled with ethylene glycol which is used as a medium for heat transfer.
3.3.2 Filters
Living HR comes with the pair of class filters and G4 pre-filters installed in the factory. Filters are used
to filter extracted air from the residence in order to prevent dust gathering on components inside of the
unit. Filters need to be replaced when polluted. New sets of filters can be acquired from your installer or a
wholesaler. Optionally, filter quality F7 can be installed for extract air filtering.
The filter type is labelled on the top of the filter.
Living HR
Operation and Maintenance Instructions
209534
5
Systemair AB
