MEV Spider
01423 859 395
SHOULD YOU ENCOUNTER ANY PROBLEMS
INSTALLING THIS UNIT, CALL US ON:
11
Commissioning
All maintenance and building works should be complete before
commissioning this MEV unit. This will avoid any major disturbance
to the installation or high volumes of dust or debris being drawn into
the system. Do not commission the MEV unit until it is fully installed
including power, ductwork, internal valves and external vents.
MEV systems must be commissioned in accordance with Approved
Document F of the Building Regulations for England and Wales. Further
good practice and advice for the installation of MEV systems can be
found in the latest edition of the Domestic Ventilation Compliance
Guide for England and Wales. For MEV commissioning guidance in
other countries, please refer to the relevant local Building Regulations
for that country.
• Determine the required ventilation rates. For guidance see Approved
Document F of the building regulations for England and Wales.
• During normal running mode, press the SET button for 4 seconds
to enter commissioning mode. (Humidity sensor input is disabled
temporarily while the unit is in commissioning mode).
• LED’s B C D will light and LED A will flash, indicating that the extract
boost flow rate is being modified.
• Fully open all extract valves then measure the air flow rate at all
system extract points using a calibrated air flow meter capable of
measuring in l/s or m
3
/hr.
• Add the extract rates from all rooms together then compare this
value to the calculated whole building (boost) extract ventilation rate.
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