OPERATION AND MAINTENANCE MANUAL
Wall Mounted 0121…0661
22 (32)
Monobloc Wall Mounted Unit - WMA/WMF 0121-0181-0251-0281-0331-0551-0661 - Rev. 2.0. - Date: 18-07-2000 EN
CLEANING THE FRESH AIR PRE-FILTRER
(only in units with free-cooling option)
To ensure sufficient flow of fresh air the metal pre-filter on the front air
intake must be cleaned regularly, especially during the cooler seasons
when free-cooling is used more often.
Free the pre-filter (
F
) from the air intake (
N
) and clean it using
compressed air or water and detergent.
The free-cooling function should not be used without the pre-filter
installed.
Fig. 7.
N
F
CLEANING THE CONDENSER
If the fins of the condenser coil are obstructed, remove all foreign bodies (leaves, seeds, dead animals, etc.) with
compressed air.
CHANGING THE DAMPER MOTOR
Check the free flow of air through the damper and the condition of the neoprene rubber, making sure that the edges
form a tight seal.
In an emergency (for example if the motor breaks) or for maintenance, press the motor release catch (
fig.8
A
) to
move the damper manually). The damper motor can be accessed after removing the side panel in models
WM*0121 - 0331 or the top front panel in models WM*0551 - 0661. To take out the motor, undo fixing screws B
completely and remove the motor from the damper shaft.
WM 0121…0331
WM 0551-0661
A
B
Fig. 8.
