Domus Ventilation HRXE-AURA-H Installation Instructions Manual - Page 8
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5.0 COMMISSIONING
The filters fitted inside the unit are protected with a plastic film.
Prior to commissioning remove the covers (Figures 21 & 22), take
off the film and replace.
•
For the required air flow rates please refer to the design specification
for the property, Section 3.6, or refer to building regulations ADF 2010.
•
The unit is supplied with independent control for both normal and
boost airflows (Figure 19).
•
Correct commissioning is essential to ensure the ventilation air flow
rates are met. It also ensures the unit is not over ventilating and causing
excessive power consumption.
•
Commissioning should be carried out in accordance with building
regulations document "Domestic ventilation compliance guide".
www.planningportal.gov.uk/building regulations/approved documents/
partf/associated. A calibrated moving vane anemometer and hood will
be required to carry out commissioning.
•
Adjustment valves should be locked in place to prevent further
adjustment.
•
once commissioned the home owner / tenant should be informed
that the unit should not be adjusted as it will have a detrimental effect
on the indoor air quality and could result in condensation and mould
growth. The clear panel covering the control has an adhesive panel
which should be exposed and sealed post commissioning to prevent
tampering.
•
Speed 1 is limited to never exceed speed 2, when commissioning
speed 2 should always be set first.
15
Speed 2
Speed 1
Speed 1
Speed 2
Unit Controls (Standard Handed Unit)
5.1 Speed 3
The unit has the ability to override both speed 1 and speed 2 to operate
the fan to maximum airflow. See wiring diagram for details of operating
this facility.
5.2 Humidity Adjustment
This product contains an internal humidity sensor fitted into the air-flow
extracting from the wet rooms. When the unit senses that the humidity
exceeds the set point the unit will boost to that set by the commissioned
boost speed. The set point can be found on the front of the unit (Figure
19) and is at its least sensitive when turned fully clockwise. Note that
the sensor is measuring humidity from all the wet rooms at the same
time and should not be relied on to solely boost the unit. Additional
switch should be used local to the wet rooms (Section 4.2).
5.3 Status Indication
The status of the unit is indicated by a series of LeD's on the front cover.
The variants are listed below.
The display on the unit control panel will not indicate when a higher
speed setting has been triggered by an external source, such as a PIR
sensor.
671951 | NovembeR 2020
Humidity
adjustment
16
Speed 1
Speed 2
Speed 3
Supply Fan Fault
Extract Fan Fault
Frost Protection
Filter Change
HX Bypass
(AB units only)
Control Panel LeD Indication
5.4 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.
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.
5.5 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.
Frost protection will only activate after ten days of continuous run time.
If commissioning of the unit is outside of this time frame please notify
the after sales department prior to site visit.
6.0 MAINTENANCE
It is important that maintenance checks are recorded and that the
schedule is always adhered to, in all cases, the previous report should be
referred to.
6.1 Filters
Filters are to be inspected every 6 months and replaced every 12 months
(or sooner if required). Failure to do so may impair the performance and
energy efficiency of this unit. A flashing LeD (Section 5.3) 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 black removal
loop on the front edge of the filter. once the filters have been inspected
return or replace them as necessary.
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