Appliance Operation - Vent-Axia HR205 User, Installation & Servicing Instructions

Power ON
Normal Operation
Fans run in whole
house mode at 80, 100,
120, 140, or 160 Volts.
Cooker Cooker
Hood Hood
Open Closed
Boost Operation
Fans run at 230 Volts.
Fig. 10
10
Optional Extras
External Controls
N o
r m
a l
Normal/boost
Switch
B o
o s t
NBSW
Normal/boost
Pull Switch
PCSW
Humidity Sensor
HS6
Continuous extract
typically from
bathroom/kitchen.
Continuous supplying
of fresh filtered
air typically to
living room/ bedroom.
Lights on the Cooker
Hood can be used.
Increased extract rates,
also extract from
Cooker Hood.
Increased supply to
living room/bedroom.
Lights on the Cooker
Hood can be used.

4.0 Appliance Operation

• HR204
When the electricity is switched on the external
controls (humidstat or normal/boost switch)
supply electricity to the fans.
On normal running the fans run at the voltage
set during commissioning (80,100,120,140 or
160 volts).
Air is then moved through the unit (see Fig 8) If
the fans become jammed then a thermal trip in
the fan senses temperature rise and breaks the
electrical supply to the motor. This can only be
reset by disconnecting from the mains
supply.
If the external controls call for boost operation
the fans automatically run at 230 volts and
increase the air movement of both exhaust and
inlet air.
• HR205
When the electricity is switched on the unit
checks for continuity across the overheat
thermostat.
The fans then run at the voltage set during
commissioning (80,100,120,140 or 160 volts).
Air is then moved through the unit (see Fig 8) If
the fans become jammed then a thermal trip in
the fan senses temperature rise and breaks the
electrical supply to the motor. This can only be
reset by disconnecting from the mains
supply.
If the overheat thermostat senses an elevated
rise in temperature from the cooker/hob it breaks
the electrical supply to the fans. The overheat
thermostat can only be reset by
disconnecting the mains supply to the unit.
In the event of a serious fire at the hob (e.g. chip
pan fire) the in built fire damper will operate
sealing the clean air side of the unit from the fire.