Commissioning and Maintenance
CAIR
plus
58
PR-2009-0096-GB • Subject to modifications • R8-10/2015
8.2
Maintenance frequency checklist
Observe maintenance frequency specified in the European guidelines and standards
(e.g. VDI 6022).
ELECTRICAL HAZARD AND DANGER OF ROTATING UNIT PARTS WITH
SHARP EDGES!
•
OBSERVE PERSONAL PROTECTION MEASURES
•
Please consider the safety instructions on page 5 and page 55ff when
performing all the described activities!
Unit part
Frequen-
cy
(months)
Action
✓
Units
for indoor
installation
(see page 62)
Monthly
•
Clean and refill available traps.
Every 3
months
•
Check casing for damage and proper fit.
•
Check/replace gaskets of all service openings.
•
Check panels for damage and corrosion, renew corrosion protection and check
proper operation of door stop device (on the pressure side).
•
Hygiene inspection (DencoHappel recommends to carry out maintenance jobs
at intervals specified in
VDI 6022
!): check built-in parts for dirt and clean, if
necessary; disinfect by wiping; check gaskets and seals for mould and microbial
growth, clean/replace if necessary.
Units for out-
door installa-
tion
(weather-
proof units for
roof installa-
tion)
refer to
page 62)
•
Complete the same steps specified for “units for indoor installation”.
Every 12
months
•
Verify that unit roof is leak-free.
•
Check side panels and cover strips, reseal as necessary.
•
Check base frame and base frame cover panels.
•
Clean external weather grille on the the fresh and exhaust-air sides.
Belt-driven
fan assembly
(see page 63
et seq.)
Every 3
months
•
Check fans and motors for secure mounting position, debris, damage and
corrosion.
•
Check anti-vibration isolators for proper operation
•
Check belt protection grille for proper operation, clean if necessary.
•
Check impeller for unbalanced condition.
•
Check tension of V-belt and inspect for wear; re-tension or replace as necessary
– for specification see page 64 et seq.
•
Check fan/motor for noise in bearing, replace bearing if necessary.
•
Lubricate non-sealed fan bearing according to the motor manufacturer’s
recommendations (refer to Tab. 8-2 on page 66).
Direct-driven
fan assembly
(See page 67)
Every 3
months
•
Check fan motors for debris, damage and corrosion.
•
Check motors for noise in bearing, replace bearing if necessary.
•
Check impeller (especially welded seams) for cracks; replace bearing if
necessary.
