Rotex RKHWE300A3V3 Manual De Instalación página 12

Thermistor and thermistor cable
Insert the thermistor as deep as possible in the thermistor socket. Fix
using the spring provided.
1
2
The distance between the thermistor cable and power supply cable
must always be at least 5 cm to prevent electromagnetic interference
on the thermistor cable.
Installation manual
4
3
4
Procedure
Switch off the power supply before making any
connections.
Connections to be made in the domestic hot water tank
electrical box
Make sure the power supply cable is insulated from the
surface of the inspection hole or can resist temperatures to
90°C.
1 Connect the booster heater power supply and thermal protection
cable as shown in the wiring diagram below.
19
20
P1
P2
19 20
X2M
19 19 20 20
RKHB
Can become hot
2 Make sure to ensure strain relief of the cable.
Connections to be made in the indoor unit switch box
3 Mount the prewired contactor (K3M), circuit breaker (F2B) and
terminal blocks (X3M, X4M). The contactor must be fixed with
the 2 supplied contactor screws and the terminal blocks must be
fixed with the 2x 2 supplied tapping screws.
4 Plug the connector connected to the contactor K3M in the
socket X13A on the PCB.
5 Plug the thermistor cable connector in the socket X9A on the
PCB.
6 Connect the prewired earth wires of the terminal block X3M and
X4M to the earthing screw.
7 Connect the booster heater power supply and thermal protection
cable (field supply) to terminal X4M earth, 1, 2, and X2M 13, 14.
8 Connect the booster heater power supply cable to the terminal
block X3M.
9 Fix the cables to the cable tie mountings with cable ties to
ensure strain relief.
10 Set DIP switch SS2-2 on the PCB to ON.
11 When routing out cables, make sure that these do not obstruct
mounting of the indoor unit cover.
Domestic hot water tank for air to water heat pump system
14
13
1
2
2 1 13 14
X4M X2M
2 1 13 14
RKHB
RKHWE300A3V3
4PW50208-1