8
nuaire.co.uk
029 2085 8400
28. 07. 20. Leaflet Number 671838
Installation and Maintenance
The MRXBOXAB-ECO4-1Z Range of Units
Telephone 02920 858 400
11.0 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.
Note: The supply cable must be replaced by an electrically competent
person.
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).
12.0 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 4 years.
This warranty is void if the equipment is modified without
authorisation, is incorrectly applied, misused, disassembled, or not
installed, commissioned and maintained in accordance with the details
contained in this manual and general good practice.
The product warranty applies to the UK mainland and in accordance
with Clause 14 of our Conditions of Sale. Customers purchasing from
outside of the UK should contact Nuaire International Sales office for
further details.
Filter
Filter cover
Outer enclosure cover
MVHR unit cover
Heat exchanger
Figure 19. Removing the two filter covers on the front panel of the
unit. The filters can be removed by pulling on the black tab on the
visible end of the filters.
9.1 Frost Protection
In the event of the intake air temperature at the unit dropping below
the predetermined set point (-5°C as standard), the supply fan will
reduce to minimum speed. Once the temperature rises above the set
point, the fan will return to its commissioned speed.
Please note this mode will only activate after ten days of continuous
run time. If commissioning of the unit is outside of this timeframe,
please notify the after sales department prior to site visit.
Nuaire recommend that filters are inspected every 6 months and
replaced every 12 months. A flashing LED (section 8.0) will indicate that
a filter change is required. This indication repeats every 12 months and
will turn off automatically after 5 Days.
Remove the filter covers on the front panel of the unit by gripping the
two circular tabs either end of the filter covers and pulling away from
the unit. The filter can now be extracted by pulling the removal loop on
the front edge of the filter. Once the filters have been inspected return
or replace them as necessary.
Inspect the heat exchanger every 5 years. Generally check for damage
and security of components. Refit cover.
IMPORTANT
Isolation - Before commencing work make sure that the unit,
switched live and Nuaire control are electrically isolated from the
mains supply and switched live supply.
10.0 MAINTENANCE
9.0 INTEGRAL AUTOMATIC HX BYPASS
Intake and extract temperatures are monitored at the point the
airflows enter the unit. If the range falls within the set parameters, the
bypass damper is opened automatically to target an indoor comfort
temperature all year round.
Note: The extract temperature is an average from all wet rooms. If
this exceeds 25°C, the unit may go into bypass depending on outside
temperatures.
13.0 AFTER SALES
For technical assistance or further product information, including spare
parts and replacement components, please contact the After Sales
Department.
