Vent-Axia HR25H Installation And Wiring Instructions page 7

Filter
Removable Grille
Control Cover
Divider Board
Grille Surround
Securing Screws
Red
White
Black
Switch
Red
Motor
Control Cover
Pull Switch
Low Voltage
Wiring
Terminal Block
Label
Motor Wires
25mm
Heat
Exchanger
Outside
Wall
Red
White
Black
From Power
Supply Enclosure
Fig. 13
Cable Entry Grommet
Divider Slot
3.0 Installation
3.3
1. Remove the unit, bezel and fixing pack from
the carton.
2. Unclip the removable grille from the unit and
remove filter (Fig. 10).
External Bezel
3. Loosen the two securing screws and remove
Fig. 10
the grille surround (Fig. 11).
4. Remove the divider board (Fig. 11).
5. Measure the total wall thickness. The outer of
the two rubber seals is adjustable and should
be set in a position that is 25mm in from the
outer face of the external wall (Fig. 12).
6. Secure the rubber seal to the unit using the
adhesive provided.
Fig. 11
7. Locate the unit in the mounting hole, but do
not push it fully in.
8. Route the low voltage cable from the power
supply enclosure to the unit.
9. Pass the low voltage cable through the cable
entry grommet at the top of the unit
(Fig. 14).
Rubber
Seal 10. Secure the unit to the wall using the four
fixing screws provided.
11. Remove the control cover by undoing the
two retaining screws (Fig. 14).
12. Strip the low voltage cable sheath back
Fig. 12
40mm from the end and separate the three
individual wires.
13. Connect the wires to the terminal block.
Connect red to red, white to white and black to
black (Fig. 13 & 14).
14. Ensure that the low voltage cable is routed
through the divider slot (Fig. 14).
15. Reassemble in reverse order ensuring the
divider board seals against the heat exchanger.
16. A bezel is provided to neaten the
appearance of the outside wall around the unit.
If required this should be fixed in place using a
suitable silicone/mastic sealant.
Fig. 14
Installing the HR25
7