Vent-Axia HR25H Installation And Wiring Instructions page 6

Fig.6
~ N
Fig.7
HR25 / HR25L ONLY
Disconnect and make safe
White wire for High speed/Off
~ N
Fig.8
HR25 / HR25L ONLY
Disconnect and make safe
Red wire for Low speed/Off
~ N
Fig.9
Power supply unit
Located here
S ELV S upply
R E D
W H ITE
BLA C K
L N
8V 0 V 24 V
2 20-240V~50H z 0-24V D .C
R E F: 447249
SELV Supply
RED
WHITE
BLACK
L N
8V 0V 24V
220-240V~50Hz 0-24V D.C
REF: 447249
S ELV S upply
R E D
W H ITE
B LAC K
L N
8V 0V
24V
2 20-240 V~50H z 0-2 4V D .C
R E F : 447249
3.0 Installation
3.2 Installing the Power Supply Unit
1. Remove the power supply unit assembly
from the carton. (Fig.6)
2. Remove the power supply unit packaging.
3. The mains input to the power supply unit
must be routed via the rear of a single gang
surface mounted back box (not supplied).
NOTE: Mains wiring must be kept separate
from the SELV wiring.
The mains connection is to the terminals
marked L & N (Fig.7)
4. Feed the 3-core cable through the rear of the
back box.
5. Mark the fixing hole positions in the back box
(not supplied) then Drill and plug the wall to
secure the power supply enclosure using the
fixing screws provided.
6. Connect the 5m cable supplied to the red,
white and black low voltage supply via the
terminal block. (Fig. 7)
NOTE: Red is positive high speed, white is
positive low speed and black is negative.
This polarity must be maintained at the unit
connections.
HR25/HR25L ONLY
The HR25/HR25L units are factory set to
opearate continuously at high or low speed
via a pull cord switch.
Two alternative settings can also be
achieved by disconnecting and making safe
the respective wires at the cable end of the
terminal block within the power supply
enclosure. The settings are as follows:-
High speed / Off – Disconnect White (Fig.8)
Low speed / Off – Disconnect Red (Fig.9)
N.B For all other models, refer to the
respective installation page.