13
Overview of PI-Air-2 functions
Function
Description
Standard
version
Optional
Accessories
required
Filter monitoring
Filter timers monitor filter service times
●
Continuous pressure sensors to monitor static
pressure drop
●
●
Continuous pressure sensors to monitor static or
dynamic pressure drop
●
●
Temperature control
Control for constant supply air temperature
●
Control for constant extract air temperature
●
Control for constant room air temperature
●
●
(room air temperature sensor)
Control for constant supply/extract
air temperature difference
●
Outdoor air temperature controlled set-point
temperature compensation
●
Summer/winter
change-over
Changes the temperature control mode for winter
and summer operation.
●
Night time cooling
Summer temperature conditions permitting, cooler
outdoor air will be used to cool the rooms
overnight. This may be controlled using a time or
temperature window.
●
Active cooling
Cooling power may be continuously regulated by
installing a cooling battery.
●
●
(passenger car radiator)
DX cooling battery digital or continuous cooling
unit output control.
●
●
(DX radiator)
Active heating/cooling
Using a combination battery, heating and cooling
may be controlled via continuous 0-10 V and
230 V pump outlet.
●
●
(Combi battery)
Cooling demand when heat is required.
●
●
(Signal relay)
Enabling cooling
Floating input, using a combi battery. External
control may determine whether cold cooling media
is available for cooling.
●
Enabling heating
Floating input, using a combi battery. External
control may determine whether hot heating
medium is available for heating.
●
Preheating –
protection from
freezing
Control signal for an electrical pre-heating battery
or digital switching output
●
●
(electrical heater)
Control signal for a PWW/glycol/brine pre-heating
battery 0-10 V mixer valve and 230 V pump
controller
●
●
(PWW heater)
Heating demand when heat is required
●
●
(signal relay)
Reheating
Control signal for an electrical re-heating battery
or digital switching output.
●
●
(electrical heater)
Control signal for a PWW re-heating battery 0-10
V mixer valve and 230 V pump controller
●
●
(PWW heater)
Heating demand when heat is required
●
●
(signal relay)
Temperature sensor
Outdoor air temperature sensor
●
Supply air temperature sensor
●
Exhaust air temperature sensor
●
Room temperature sensor
●
●
(room air temperature sensor)
Extract air temperature sensor
●
Bypass output control
heat recovery
Continuous bypass control for optimal energy
recovery
●
Bypass frost protection
Opening the bypass duct for frost protection of the
heat exchanger.
●
Fan protection
An alarm will trigger and the plant will switch off
should a fan be damaged.
●
Fire alarm system
Input for an alarm signal from a central fire alarm
(floating contact). An active alarm will stop the
plant.
●
O P E R A T I N G A N D I N S T A L L A T I O N I N S T R U C T I O N S L G
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P A G E
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