29
Commissioning and Maintenance
Unit part
Interval
(months)
Task
Rotary heat
exchanger
3 months
• Check tension of drive belt, re-tension as necessary.
12 months
• Clean heat exchanger fins – wet cleaning may only be
carried out if a tray has been installed – never clean the heat
exchanger fins with high pressure water or steam.
• Clean chamber.
• Check efficiency of damper where an energy recovery
system with bypass configuration is used.
• Check peripheral seal, adjust as required.
• Check alignment of motor.
Dampers and
shut-off
dampers
6 months
• Vacuum clean dampers (blow out), never apply grease!
• Detach the drive from the dampers and check dampers for
ease of movement.
• Check that the drive (damper actuator) reaches its end
positions.
Sound
attenuator
6 months
• Check the sound attenuating chamber and sound
insulating splitters for contamination, clean as necessary.
Units in general
Commissioning of units for installation indoors
The following commissioning steps must be carried out:
• Carefully check the entire casing and parts such as
– Doors and service openings
– Handles and levers
– Connections with foam rubber seals
– Inspection windows
– Panels
for damage and firm seating.
• Remove protective film, if present.
• Remove all transportation locks.
• Make sure that there are no loose items inside the unit.
• Check that the unit is airtight.
• Clean the unit as described under „Basic cleaning and maintenance tasks“ on page
52.
Maintenance of units for installation indoors
ELECTRICAL HAZARD AND DANGER FROM ROTATING UNIT PARTS!
OBSERVE PERSONAL PROTECTION MEASURES.
In doing so, be sure to observe the safety information on page 24.
