14
Electric heater
Check the connections
Clean off dust, and check the electrical components
and connections of the heater
Pressure sensor
Check electrical connections
Check the operation
Temperature sensor
Check electrical connections
Check the operation
Air supply and extract system
Check the connections
Clean
Air duct system
Check the tightness
Clean
Dampers, diffusers, grid
Check the tightness of connections
Clean
Switching unit (contactor)
Every 3 to 4 months, visually assess the functioning
of the switching unit (contactor), i.e. make sure that
its casing has no signs of melting or is not thermally
damaged otherwise and does not produce any unusual
sounds. All the contactors in the product or in its ac-
cessories must be checked.
6.3. COVER OPENING
Before opening the covers, first, unplug the unit from the mains, then wait for 2 minutes (until the fans completely stop).
Figure 6.3.1. WPZ
6.4. FILTERS MAINTENANCE
Figure 6.4.1. WPZ
In order to remove the filters, open unit door and take off the filters.
Dirt increases air resistance in the filter, therefore, lower amount of air is supplied into the premises. Arrows on the filters must comply with
airflow direction.
After changing the filters, please reload the filter timer (if used). The instruction on reloading can be found in the control panel
operation manual
Operation of the unit without filters is not allowed.
Change the filters every 3-4 months or according to the notification on the control device.
6.5. FANS MAINTENANCE
• Fan maintenance should be performed by experienced and trained staff only.
• The fan should be inspected and cleaned at least once per year.
• Prior to commencing any maintenance or repairs , make sure the fan is disconnected from the power source.
• Proceed to maintenance and repair after any fan rotation is stopped.
• Observe staff safety regulations during maintenance and repairs.
• The motor features a heavy-duty ball bearing design. The motor is completely sealed and grease- free.
• Detach the fan from the unit.
• The impeller should be particularly checked for built-up material or debris that may cause an imbalance. Excessive imbalance may lead to ac-
celerated wear on motor bearings and vibration.
• Clean impeller and inside housing with mild detergent, water and damp, soft cloth.
• Do not use high-pressure cleaner, abrasives, sharp tools or caustic solvents that may scratch or damage the housing and impeller.
