Dantherm HCH 5 MKII Manual page 41

INSTALLATION & SERVICE MANUAL FOR PROFESSIONALS
Maintenance and care: Preventive maintenance
Fans
Step
(2 years)
1
2
3
4
Follow this procedure, if the unit is equipped with a heating element:
Step
1
2
3
4
Inspect and clean the bypass with a brush, if needed.
Bypass (2 years)
The bypass module shall only be checked when an
eerror occurs or if the unit is open e.g. in connection
with another service.
Check that the bypass module is well functioning.
Try to open/close the damper manually with the
trigger (requires a magnet) to check functionality.
Action
WARNING
There might be sharp edges on the fan boxes, which implies a risk of cutting
yourself .
• Wear protective gloves while inspecting and cleaning the fan boxes.
Remove one of the fan boxes.
• Carefully remove rail for the drip tray
• Pull out the left with a pincer
• Pull out the right with the hand
(remember to wear gloves).
Carefully clean the fan's blades with
compressed air or a brush through the
opening at the base of the fan box. All
blades must be clean to maintain ventila-
tor balance. Be careful not to remove the
small metal balancing pieces on the fan
blades as this may cause vibrations.
Turn the fan with your fingers and listen
for buzzing sounds from the bearing.
If this occurs, the fan probably needs
replacing.
Refit the fan box and repeat steps 1–5 with the other fan box.
Action
Make sure the heating element is completely cooled down before cleaning.
WARNING
The heating element can become very hot . If it does not cool down complete-
ly, there is a risk of severe skin burns .
• Disconnect mains plug from electrical outlet and wait for 10 minutes in order
to ensure that the heating element is completely cooled.
Remove the heating element.
Clean with a brush and inspect for visible damage.
Refit the heating element.
Illustration
Illustration
41