8
5.0 Appliance Operation
On normal running the fans run at the speed
set during commissioning (speed 1, 2, 3, 4 or 5).
If the external controls call for boost operation
the fans automatically run at the boost speed &
increase the air movement of both exhaust &
inlet air.
Optional Extras.
External Controls.
Normal/boost
Switch
NBSW
N
m
or
al
Bo
t
os
Humidity Sensor
HS6
Normal/boost
Pull Cord Switch
PCSW
CMSM control
TIM2 timer
The LoWatt HR204 can only be connected to
external controls with an uncommitted relay.
If the fans become jammed, then the
electronics will sense the reduction in speed
(rpm) and stop the electrical supply to the
motors to prevent overheating. The unit will
check the ability of the fan to rotate every
couple of seconds.
Air is then moved through the unit (see Fig 6).
Humidity Sensor
Ecotronic