CIAT MAJOR LINE 102A Manuel D'instructions page 45

> Powering up without ventilation.
> Filter partially clogged.
> Coil and fan stopped simultaneously by control.
Important: Never wire several fan motor assemblies in parallel on the same
thermostat.
CARE AND MAINTENANCE
The unit must be serviced periodically between the heating and cooling seasons. In
particular, components prone to clogging: the filter, condensate drain pan, coil,
condensate drain pump ...
Ensure that the hydraulic and power supplies to the unit are disconnected
!
before carrying out any work and wait at least 20 mins before working on
or near the heaters.
For your safety, wear protective gloves to prevent the risk of burns from hot
pipes.
AIR FILTER MAINTENANCE
The filter is key to ensuring the unit runs correctly. Without it, there is a risk the heat
exchange coil will become clogged. We recommend changing the filter between
each operating season. For more frequent maintenance, the filter can be cleaned
by running a vacuum attachment in the opposite direction to the flow of air. Check
the filter's appearance regularly. The required cleaning frequency will depend on
where the unit is installed and its operating conditions.
For an NCH model equipped with a plenum at the air recovery, the unit may be
supplied without a filter at the customer's request. The customer must ensure at least
G3 upstream filtration. Failure to do so will lead to loss of the motor warranty cover.
The filter should never be cleaned using water or detergent products, which could
cause the spread of bacteria.
Standard air recovery (fig. 15):
Horizontal model:
Removing the filter via the rear section of the unit: Swivel the runners (a) and slide
the filter (b) towards the bottom, freeing it from the runners.
Vertical model:
Removing the filter via the lower section of the unit: Swivel the runners and slide
the filter towards you, freeing it from the runners.
NCH H or NCH U model (fig. 16):
Remove the screws located at the edge of the plenum (a) and partially unscrew the
screws on the sides of the plenum (b).
Slide the lower plenum panel (c) to give access to the rear section of the unit.
Swivel the runners (d) and release the filter (c) by pulling it downwards.
EN - 13
EN