LAB964R, Issue 4, May 2014
Page 10
9
Commissioning
9.1
When the wiring connections have been checked, switch on the mains supply and check that the
system is operating correctly. The appliance should switch between low and boost speeds using the
chosen manual boost switch (see 1.2). Check other switch and sensor functions are operating
correctly.
9.2
To balance the system, airflow rates will need to be set at each room’s air valve in accordance with the
2010 Domestic Ventilation Compliance Guide. Airflow measurements should be performed using a
calibrated airflow measuring device and the results recorded in litres per second (l/s) onto the
Inspection Checklist and Airflow Measurement Test Sheet contained within the 2010 Domestic
Ventilation Compliance Guide. The most common method uses a vane anemometer, or similar, placed
in a hood which completely covers the air valve to measure the extract or supply airflow rate. The
instrument should be calibrated annually by returning the instrument to a UKAS accredited calibration
centre and be capable of achieving an accuracy of ±5%. We recommend using Polypipe’s CM01 vane
anemometer. Please call our Customer Service team on 08443 715523 for more information or visit
www.polypipe.com/ventilation/ventilation-installer-training.
9.3
Each room airflow rate will need to be recorded on the Inspection Checklist and Airflow Measurement
Test Sheet. A completed copy must accompany these instructions and be handed over to the
dwelling’s owner upon completion of the installation.
10
System balancing
•
Fully open all of the air valves
•
Switch the system to boost
•
Close all internal and external doors and windows
•
Measure the total air volume of the extract valves (wet rooms)
•
Remove the rubber tamper-deterrent cap and using a small screwdriver, adjust the ‘boost’
control on the wiring centre to achieve the whole dwelling extract ventilation rate
•
Adjust individual room air valves to achieve the individual room boost extract rates
•
Switch the system to low
•
Measure the total air volume of the valves
•
Remove the rubber tamper-deterrent cap and using a small screwdriver, adjust the ‘low’ control
on the wiring centre to achieve the whole dwelling ventilation rate
•
Using the lock nuts fitted to the air valves, lock in position
•
Refit the rubber tamper deterrent caps to the lid of the wiring centre
11
Maintenance
11.1
The
CMX
appliance is essentially maintenance free; however, if necessary the main body can be
removed from the ducting for periodic cleaning as follows:
11.2
Isolate and disconnect the power supply.
11.3
Remove the 8 x M8 dome nuts and mudguard washers and remove the body from the retained bolts
and ducting.
11.4
Clean out the body using a brush, dry cloth or vacuum cleaner.
11.5
Reassemble and reconnect to the power supply.
