Electrical Connections - Carrier 42KY serie Bedienungsanleitung

4.6. Electrical connections

 Disappearance of the causes of the stoppage may pose the risk of danger during restarting.
 Disconnect the electrical supply to the unit before carrying out any work.
 Only personnel qualified to perform electrical work
Before connecting the unit to the network, ensure that the voltage matches that indicated on the data plate (230 V/1-ph/50-60 Hz).
42KY
V5
V4
V3
V2
V1
An earthing connection is compulsory. Carrier will not accept liability for the consequences of faulty or non-existent
earthing. Always follow the circuit diagram delivered with unit.
Circuit diagrams for customer applications should be based on the diagrams supplied:
- Unit wiring for 2-pipe systems, without condensate pump (Fig. 10).
- Unit wiring for 4-pipe systems, without condensate pump (Fig. 11).
- Unit wiring for 2-pipe systems with an electrical heater using 2 heating elements, without condensate pump (P=900 or 1200W
max) (Fig.12).
Note: if necessary, the output of the 300W electrical heater can be reduced by removing the shunt positioned between terminals
8 and 9.
We recommend using a system that controls the device in relation to the temperature of the water (to actuate the valve(s)), used
with an electrical heater.
All electrical connections are are made in the electrical box marked with the symbol
a cable grommet to facilitate the routing of the cables to the terminal block.
 To access the electrical terminal block:
Disconnect the unit from the electrical power supply.
Disappearance of the causes of the stoppage may pose the risk of danger during restarting.
Use a screwdriver to undo, but not remove, the lateral retaining screw on the electrical box casing (Fig. 13 a).
 Modifying the motor speeds:
Always use a screwdriver when performing cabling operations.
42KY offers a choice between two types of motor technology:
Asynchronous and Brushless (low consumption).
- The asynchronous motor:
To optimise the unit's performance and depending on the type of control used. The unit has five speeds numbered V1 to V5
connected to the terminal block in the electrical box (V1= low speed and V5= high speed).
The customer must select and wire the required speeds for his thermostat on the fan terminal block (from V1 to V5).
To open a connection point and change the cabling (Fig. 14):
- Place the end of a flat-blade screwdriver in the hole located just below the cable to be removed.
- Release the cable and move it to the marker for the desired speed.
- Place the screwdriver again in the hole just below the desired speed, insert the cable and remove the screwdriver; this ensures
a secure contact.
Repeat the procedure for the remaining customer speeds.
IMPORTANT: the wires coming from the motor and connected to terminals V1 to V5 must never be interconnected.
IMPORTANT: it is essential to refit the electrical box casing once all the cabling and adjustment operations are complete.
- The brushless motor (EC):
This has a motor speed electronic control unit which uses a 0-10V control signal or 3-speed on/off control (to be selected by the
customer depending on the controller or thermostat used with the unit).
- Controller or thermostat for 3-speed on/off control:
• S witch on the unit and select the ventilation speed to be modified using the thermostat.
- Controller providing a 0-10 V control signal:
• T he 0-10V setpoint voltage information is issued by the controller itself. Refer to the operating and configuration instructions
supplied by the manufacturer.
AC Asynchronous Motor
10/ 20
W A W A
75 0.33 75 0.33
45 0.20 45 0.20
38 0.16 38 0.16
28 0.12 28 0.12
19 0.08 19 0.08
may carry out installation and maintenance work.
EC brushless motor
30 19
Puissance absorbée
W A W A
98 0.43 35 0.18
73 0.32 15 0.09
59 0.26 11 0.07
48 0.21 7 0.04
35 0.15 5 0.02
EN - 6
29 39
W A W A
36 0.18 57 0.40
14 0.09 32 0.28
10 0.07 22 0.17
7 0.04 15 0.13
5 0.02 9 0.10
. The electrical box is equipped with