9.3 Repair
If required, contact Hoval customer service.
Product service life
Component
Service life
EC motors of the supply air and
exhaust air fans
approx. 30'000 to 40'000 hours
depending on the application and environmental conditions
Damper actuators with
spring return
at least 60'000 emergency positions
Table 19: Product service life
10 Dismantling
Caution
Risk of injury caused by falling load and improper handling.
– Wear protective equipment (fall protection, helmet, safety shoes).
– Do not stand under suspended loads.
– Use cranes or helicopters with sufficient load-bearing capacity.
– Do not lift the two-part unit in one piece.
■
Close the cut-off valve in the gas supply line.
■
Disconnect the power supply to the unit.
■
Wait at least 3 minutes after switching the unit off.
Caution
The use of condensers can pose a danger of fatal injury from directly
touching live parts even after the unit is switched off. Only open the
access doors after waiting 3 minutes.
■
Empty the heating circuit.
■
Dismantle all media connections.
■
Dismantle the flue gas pipe.
■
Disconnect the unit from any fastenings.
■
Open the supply air access door and the extract air access door.
■
Unscrew the fan protecting plate.
■
Disconnect the screw connection between the roof unit and below-roof unit.
■
Remove the cover caps on the unit roof.
■
Screw in the transport eyes and attach the lifting gear.
■
Remove the roof unit.
■
Screw in the transport eyes into the connection module frame and attach the
lifting gear.
■
Remove the below-roof unit.
38
RoofVent
®
KG
Operating instructions
Dismantling
4 220 755-en-00
