Carrier 42N_S - Fan Motors and Maintenance; Motor Specifications and Efficiency Features; Maintenance Tasks

31
42N_S 42N_E
English
The units have tangential/centrifugal motors with selectable speeds.
There are 5 speeds available:
For sizes S15-S20-S30-S45, there are 5 available speeds Ultra Low- Low-
Medium-High-Super High (see table on the right).
All machines are congured at the factory as follows:
ULTRA LOW - MEDIUM – SUPER HIGH.
In the case of particular needs, it is possible to move the speed
connections (with Faston quick-connectors) following the enclosed
table and relative drawing (see Fig. 29).
For sizes S26-S42-S65 3 speeds are available: Low-Medium-High (see
tab. on the side).
Fan Motor
Low Energy Consumption Fan Motor version
The fan coil units of the series 42NE… can ensure a 0% - 100% constant
air ow modulation (and therefore the thermal and refrigerating
capacity) thanks to the Inverter technology combined with the last
generation of high energy-ecient 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
IMPORTANT:
The following maintenance operations should be carried out by
qualied 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 overow.
Heat exchanger coil
At the beginning of any winter and summer season it is advisable to
check that the coil ns 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 ns.
Motor
The motor is permanently lubricated.
Therefore no periodical maintenance is required.
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.
Low Energy Consumption Fan Motor
Maintenance
Motor 5 speed
MOTOR SPEED
CABLE COLOR
ENGINE
FACTORY
CONNECTION
ONLY FOR SIZE 15
WHIT ELECTRIC
HEATER
ULTRA LOW RED RED -
LOW YELLOW -
MEDIUM WHITE WHITE RED
HIGH ORANGE WHITE
SUPER HIGH BLACK BLACK BLACK
MOTOR NEUTRAL BLUE BLUE BLUE
Motor 3 speed
MOTOR SPEED CABLE COLOR
ENGINE
FACTORY
CONNECTION
HIGH BLACK BLACK
MEDIUM WHITE WHITE
LOW RED RED
MOTOR NEUTRAL BLUE BLUE