During maintenance work in autumn please check the condensate drain is secure and not
clogged. This can be tested by pouring some water into the drain pan and checking the water
coming out of the unit through the condensate drain. Clean the drain, if necessary. Also ensure
that the insulation of the condensate pipe is adequate.
Check that the unit and all wall-mount fastenings are sufficiently tight and have not become
loose. Re-tighten if necessary.
The following accessories for this unit can be ordered from Airflow Developments Ltd:
Mechanical ventilation units require good quality ducting and a high standard of installation.
To ensure the best results, we recommend the innovative AIRFLEX PRO semi-rigid ducting
system.
10.4 Other Maintenance Procedures
11. Accessories
Part Number Product Description
G4 filter pack (2 filters)
F7 filter pack (2 filters)
Boost switch (1-way)
Electric duct heater (1 kW)
(can be used as pre-heater or post-heater)
Room humidistat
PIR Motion sensor
Pressure sensors for filter monitoring
90000322
90000323
90000228
90000324
9041570
51969702
90000326
Step 2: Remove the front cover plate and the bypass module by unscrewing the screws.
Step 3: Replace the sensors gently.
Page 28 of 32
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