Unit must not be switched off, product is
designed to run continuously.
3
16. 06. 15. Leaflet Number 671391
Installation and Maintenance
LPXBOXAC-2 Mechanical Ventilation with Heat Recovery
For good EMC engineering practice, any sensor cables
or switched live cables should not be
placed within 50mm of other cables or on the same
metal cable tray as other cables.
Isolation - Before commencing work make sure
that the unit, switched live and Nuaire control are
electrically isolated from the mains supply.
Please note this product must be earthed.
N
L
SL
TRICKLE BOOST
A B C
D E F G
3.0 Electrical Wiring
3.1 Additional Control Wiring Option
The two fans are pre-wired into an external wiring box for
ease of connection. (see figure 6 for connection details).
All incoming mains connections must be routed through a
suitable local isolator for maintenance purposes.
Units are supplied configured to run on speeds 1 and 3.
To change the duty the links may be removed and refitted
to the other positions. (See table 1).
L
N
2
1
L
N
E
Supply
230V
50Hz
3 pole
isolator
2
1
L
N
Supply fan
boost switch
Extract fan
boost switch
3A fuse
All switches by others
Fan unit
Figure 6.
Table 1.
Figure 7. Circuit Board Connections.
TRICKLE
BOOST
SPEED 1–Link B (As supplied)
SPEED 3–Link D & F (As supplied)
SPEED 2–Link C
SPEED 4–Link G
SPEED 3- Link A & C
SPEED 4–Link G
4.0 Maintenance
It is inevitable that even with filtered extract grilles as
recommended in BRE digest 398 some dust, fluff etc. will
pass through the filter, and which, if allowed, will build up
internally on motors and impellers, shortening the life of
the unit and, in severe cases, leading to overheating of the
motors. Consequently, it is strongly recommended that all
units are inspected and cleaned every six months.
It is recommended that the drip-tray and the heat-exchanger
should be inspected, cleaned and disinfected at regular inter-
vals to prevent a build-up of mould and bacterial growth.
5.0 Cleaning
Remove covers and carefully clean out interiors as necessary.
To clean the filter, remove from the unit and wash in tepid
water to which a little mild detergent has been added.
Shake out excess water and allow to dry naturally.
Replace when dry. Check for damage and security of
components. Refit covers.
To remove the drip-tray and the heat-exchanger, disenguage
the retainer clips. Take care not to let the drip-tray and the
heat-exchanger drop down. Clean by washing the parts in
tepid water with suitable disinfectant.
Allow to dry naturally before refitting back into the unit.
6.0 Replacement of Parts
Should any component need replacing Nuaire keep extensive
stocks for quick delivery. Ensure that the unit is electrically
isolated, before carrying out any work.
When ordering spare parts, please quote the serial number
of the unit and the ARC number of the purchase if possible.
(This information will be available on the fan label).
7.0 Warranty
The 5 year warranty starts from the day of delivery and
includes parts and labour for the first year and parts only
for the remaining four years. This warranty is conditional
on planned maintenance being undertaken.
8.0 Service Enquiries
Nuaire can assist you in all aspects of service. Our Technical
Support department will be happy to provide any assistance
required.
Telephone 029 2085 8400
Fax029 2085 8444
