Envirovent MEV SPIDER Installation Manual page 12

06 Commissioning
Commissioning of a continuous running Multiple Extract Ventilation system- MEV
Commissioning of
necessary to provide adequate ventilation
to the dwelling, as stipulated in Approved
Document F (ADF) of the Building
Regulations*
Conditions - all
development works should be completed
prior to the commissioning of the unit, this
is to avoid high levels of dust being drawn
into the system and general disturbance
to the setup. The unit should only be
commissioned when fully installed, with
power, ductwork, valves and vents in place.
See Domestic Ventilation Compliance
Guide.
Equipment required - Anemometer which
is capable of measuring l/s or m³/hr.
Commissioning method - Once the
previous conditions are met, boost and
trickle rates need to be set. These should
be set as outlined in the commissioning
guide (pages 9-10).
Commissioning guide
Boost rate (minimum high rate)
• Determine the whole building ventilation rate.
See ADF of the Building Regulations.
• Open ceiling/wall valves.
• Measure all extract points summing the
individual room rates. Measurements
to be carried out with an appropriate
anemometer.
* Applicable in England and Wales. For other countries please refer to your local building regulations.
11
the system is
maintenance and
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• Adjust using and
or down until the total extract rate is met.
See the individual product's instruction
guide for method (pages 9-10).
• When the desired overall extract rate
is achieved, the
should then be adjusted to draw the
appropriate volume of air from each room,
typically starting with the largest extract
requirement first: kitchen, bathroom,
utility room, en-suite and WC.
• It may be necessary to adjust the fan unit
slightly to account for increased pressure.
• When adjustments are completed the
valves should be locked into position to
maintain settings.
Trickle rate
• This should be set around about 75% of
the Boost rate.
See ADF of the Building Regulations.
• As the valves have been commissioned
at boost they will not need to be altered
further, the trickle buttons should be
adjusted up or down, until the lower
extract rate is met. See the individual
product's instruction guide for method on
pages 9-10.
For guidance on
practice for MEV
latest edition of the latest edition of the
Domestic Ventilation Compliance Guide*.
This guide provides in depth information on
all aspects installation, inspection, testing
and commissioning.
buttons, press up
individual valves
good installation
systems see the