BPC Vent-Axia Integra Installation And Wiring Instructions page 6

Fig.2b (Integra operated by an Ambient Response humidity sensor)
FAN UNIT
TERMINAL BLOCK
TRICKLE
N1
BOOST
N2
L
Fig.2c (Integra Controlled by a single Trickle/Boost switch via a 150VA transformer)
5 4 3 L N
AMBIENT RESPONSE
HUMIDITY SENSOR
(563501)
(Not supplied)
3A
6
N
L
220-240V
50Hz