Type of maintenance
Once a year
When
necessary
Heat pump
• Checking the compressor
• Checking the evaporator for potential leakage
• Checking the condenser for potential leakage
X
Fans
• Cleaning the fans
• Inspecting of vibration dampers and flexible connections
X
Cleaning the duct system
X
1
Cleaning the condenser/drip tray
X
Dampers
• Checking the dampers
• Cleaning the dampers
X
1.
Or in accordance with local rules and regulations.
7.3 Maintenance Instructions
7.3.1 Checking the fan
7.3.1.1 Cleaning
Even if the required maintenance, such as change of filters, is carried out dust and grease may slowly
build up inside the fans. This will reduce the efficiency. The fan motor can overheat if a thick layer of dust
prevents the air from entering the motor to cool down the stator structure.
•
The external surfaces may be cleaned with a
cloth or a soft brush. If they are severely fouled,
use an environmentally friendly de-greasing
agent. Do not use water. White spirit can be
used to remove obstinate settlements. Allow
drying properly before starting the unit.
• Wipe the fan impeller blades to remove any
coatings. Use only the environmentally friendly
de-greasing agent.
7.3.1.2 Inspection
• Check if the fan impeller rotates easily, is in balance and does not vibrate.
• Check if the fan impeller is fixed and overlaps inlet cone.
• Listen to the sound coming from the motor bearings. It should make a slight purring sound. A scraping
or pounding sound can indicate that the bearings are damaged and should be changed.
• Check if the rubber anti-vibration mountings are not damaged and intact.
Operation and Maintenance Instructions
209531
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Systemair AB
