Carrier 42NC, Инструкции по установке, эксплуатации и обслуживанию, Страница: 16 / 20

10 - CARE AND MAINTENANCE
The unit must be serviced periodically between the heating and
cooling seasons. In particular, components prone to clogging
(filter, condensate pan, coil, condensate pump, etc.) must be
checked.
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 a 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.13):
Horizontal model:
Removing the filter from the rear 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 from the inside of the unit: swivel the
runners and slide the filter towards you, freeing it from the
runners.
Model 42NI or 42NU (fig.14):
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.
Front air recovery (fig.15):
Vertical model:
To remove the filter, swivel the runners (a) and release the
filter (b) by pulling it upwards.
Horizontal model:
To remove the filter, swivel the runners and release the filter by
pulling it towards you.
When refitting the filter, ensure the runners are securely
clipped in to lock them.
Front air recovery, cased model (fig.16):
Turn the 2 x 1/4 turn screws (a), swivel the grille and remove the
filter (b) from its housing.
FAN MOTOR ASSEMBLY MAINTENANCE
Periodically check the cleanliness of the impellers and the motor.
If necessary, clean them using a vacuum cleaner, taking care
not to damage them. No special maintenance is required for the
electric motor.
Removing the fan motor assembly (fig.17):
l
Disconnect the wires from the motor (on the terminal)
after the unit has been powered off.
l
Remove the air filter (see filter maintenance).
l
Remove the front fan motor assembly panel (a).
l
Remove the ½ scroll(s) (b) by unclipping the 2 lugs, with
a tool (screwdriver) (c) and the 2 disassembly clips (d).
l
Unscrew the motor retaining screw (e).
l
Remove the motor/impeller assembly from the unit.
To reassemble the fan motor assembly, perform these steps in
the opposite order.
CONDENSATE DRAIN PAN MAINTENANCE
The condensate pan must be kept clean. Clean the plastic pan
and its connection fittings completely with water-based non-
abrasive cleaners.
The pan must be removed for cleaning by unscrewing the 2 side
screws and the 2 front screws from the pan (fig.18).
Also check periodically that the drain pipe is not blocked, bent or
kinked, and has the required gradient of -0°/+2 along its entire
length.
Before starting up the unit, check that the water flows properly
into the condensate pan by pouring some water into it.
EXCHANGER COIL MAINTENANCE
A clean coil is crucial to the efficiency of the unit. If necessary,
clean the coil with a vacuum cleaner, taking care not to damage
the fins.
If the coil must be disassembled on account of a leak:
l
Disconnect the water coil and the condensate drain.
l
Remove the fan motor assembly (see the section above)
l
Remove the condensate pan (see the section above)
l
Unscrew the side screws from the exchanger coil and
remove it from its housing between the unit’s support feet.
Note: The condensate pan can be removed without having to
remove the heat exchange coil.
CASING MAINTENANCE
To maintain the appearance of the unit, wipe it clean with a
slightly soapy, damp sponge and buff it with a soft, dry cloth. Use
water-based non-abrasive cleaners.
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