Low Energy Consumption Fan Motor; Maintenance - Carrier 42N S-Serie Installations- Und Bedienanweisungen

Low Energy Consumption Fan Motor

Low Energy Consumption Fan Motor version
The fan coil units of the series 42NE... can ensure a 0% - 100% constant
air flow modulation (and therefore the thermal and refrigerating
capacity) thanks to the Inverter technology combined with the last
generation of high energy-efficient electric motors (EC brushless). This
enables a constant control on the power supplied according to the
room that need to be conditioned. The result is 50% electric energy
saving compared to traditional 3-speed asynchronous motors and a
considerable reduction of acoustic emissions.
The new range of fan coil units 42NE is equipped with 4 Low Energy
Consumption Fan Motors one of which is tangential and 3 centrifugal.
The table below shows the electrical characteristics of the four types of
motors.
42NE E19
MINIMUM SPEED
4,5
POWER INPUT (W)
CURRENT DRAWN (A) 0,057 0,061 0,076
MAXIMUM SPEED
14,5
POWER INPUT (W)
CURRENT DRAWN 0,144 0,144 0,271 0,514

Maintenance

IMPORTANT:
The following maintenance operations should be carried out by
qualified personnel.
Disconnect the mains power supply prior to any maintenance
operations or prior to handling any internal parts of the unit.
Condensate draining
During the summer season check that the condensate drain is free from
dust and lint that could clog it, causing condensate water overflow.
E19/E.
E29 E39 E49
ELECTRIC
HEATER
4,6 6,4 9 7,4
0,09 0,08
14,5 30,1 60,9 14,5
0,144
NOTE:
The values showed on table are reported only at the Low Energy
Consumption Fan Motor to they are necessary add the control
input power which correspond about 5W
The fan coil units of the series 42NE are submitted by Carrier to the NTC
control (see attached additional manual) for best regulation of room
temperature.
No further electrical connections are necessary (beside power supply
and communication bus)
for this unit.
All connections between electric components and motor are factory
made.
In the centrifugal units, the inverter regulation board is directly installed
on the motor frame and protected by a metal case.
See fig. 39-40.
Due to the lack of space, in the tangential units the regulation board is
installed in the electric panel of the NTC controller.
See fig. 38.
Heat exchanger coil
At the beginning of any winter and summer season it is advisable to
check that the coil fins are not clogged with dust, lint or other foreign
matter.
Clean the heat exchanger after having removed the supply grille, taking
care not to damage the fins.
Motor
The motor is permanently lubricated.
Therefore no periodical maintenance is required.
42N_S 42N_E
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