21
The following electrical connections must be made:
◊
Connecting the power supply
◊
Connecting the cable remote control if applicable
Please follow the instructions below to install the electri-
cal connections:
◊
The inner units function independently of the chiller.
An electrical control line is hence not necessary.
◊
The electrical connections are to be performed as
fixed connections in accordance with the relevant
regulations.
◊
An all-polo separating switch is to be installed in the
power line in front of the unit.
◊
The power line must be insulated adequately by the
customer and the line drop may not fall below the
permissible values.
◊
Make sure that the electrical system is suitable to
supply the required operating current for operating
the unit and any other units that are already in opera-
tion.
◊
Prior to installation, if connections are made to exist-
ing system parts, you must check that the line has
the right dimensions for unit consumption.
◊
The units must always be connected with low-ohm
protection conductors with sufficient dimensions. In
certain circumstances, the module must be grounded
as a measure to protect against lightning in several
places (especially when plastic pipes are used).
Terminal
strip
Normal status
Input /
Output
Function
Connections
01 – 02
ST 1
Incoming water - Sensor
PTC - input
03 – 04
ST 2
Outgoing water – Sensor
PTC - input
05 – 06
ST 5
Condenser – Sensor
PTC - input
07 – 08
closed
AT 1
High pressure switch
Neutral contact
09 – 10
closed
AT 3
Low pressure switch
Neutral contact
11 – 12
closed
AT 5
Not in use
Neutral contact
13 – 14
12 V ~
Tr
Current supply
12 V ~, 50 Hz
15 – 16
Closed when pump is in operation AT 9
Differential pressure monitor
Neutral contact
15 – 17
AT 7
Heating-cooling removed
Neutral contact
15 – 18
closed
AT 10
On Off, remote control contact for heating pump Neutral contact
19 – 20
RL 1
Global shut-off
Max. 48 V ~, 200 mA
22 – 23
RL 2
Defrost heating / Boiler signal
230 V ~, 50 Hz, 4,0 A
22 – 24
RL 4
Compressor
230 V ~, 50 Hz, 0,4 A
22 – 25
RL 8
Circulation valve (heating pump only)
230 V ~, 50 Hz, 0,4 A,
21 – 22
RL 10
Pump switch contact
230 V ~, 50 Hz, 4,0 A
42 – 43
TK 1
Fan regulation - output
Phase regulation
Description of the CH-DIN inputs and outputs
All electrical connections such as power input, cable re-
mote control, etc., are to be made in the switch box of
the unit. The lines to be laid must be guided through the
appropriate cable penetrations on the back of the unit
into the housing.
All units require a three-phase alternating current con-
nection. The power line is to be guided through the L1,
L2, L3, N and PE terminal strips.
The line dimensions are based on the local conditions.
The connection capacity of units can be found in the ta-
ble below:
Type
RKW INOX
1000 1600 2600 3600 4500 8000 9800
Electrical connection
400 V /3~, N. PE / 50 Hz
Power consumption
kW
4.4
7.1
11.2 15.7 19.4 36.0 45.2
Cur. Consumption max.
A
8
12.8 18.8 26.3 32.6 58.5 73.5
Start-up current
A
49
101
167 2x90 2x120 2x116 2x127
Fuse protection
customer-side
A
20
20
25
35
50
80
100
Electrical Connection
G
Warning! The units are equipped with a phase-sequencer relay that prevents the unit from operating if the ro-
tational direction of the electrical connection is wrong. If the chiller remains neutral (i.e. no current) when be-
ing put into operation, the rotational field must be switched.
G
Electrical installations may only be performed by
authorised service personnel. Prior to performing
any work on the unit, it must be unplugged from
the power supply.