Field Wiring Guidelines; Connection Of The Indoor Unit Power Supply And Communication Cable - Rotex RKHBH008BB3V3 Manuel D'installation

Item Description
1 Power supply cable for outdoor
unit
2 Indoor unit power supply and
communication cable
3 Power cable for bottom plate
(c)
heater
4 Power supply cable for backup
heater
5 Room thermostat cable
6 3-way valve control cable
7 2-way valve control cable
8 Booster heater power supply
and thermal protection cable
9 Thermistor cable
10 Booster heater power supply
(f)
cable
11 Benefit kWh rate power supply
cable (voltage free contact)
12 User interface cable
13 Normal kWh rate power supply
(a) Refer to nameplate on outdoor unit.
2
(b) Cable section 2.5 mm
(c) Bottom plate heater cable is only applicable in combination with RRLQ or
in case of optional EKBPHT kit.
(d) Minimum cable section 0.75 mm
(e) See table under "Connection of the backup heater power supply" on page 20.
(f) Only applicable for tank with built-in electrical booster heater (RKHW*).
(g) The thermistor and connection wire (12 m) are delivered with the indoor unit.
2
(h) Cable section 0.75 mm till 1.25 mm
Voltage free contact shall ensure the minimum applicable load of 15 V DC,
10 mA.
2
(i) Cable section 0.75 mm till 1.25 mm
CAUTION
Select all cables and wire sizes in accordance with the
applicable legislation.
WARNING
After finishing the electric work, confirm that each electric
part and terminal inside the electric parts box is connected
securely.

Field wiring guidelines

■
Most field wiring on the indoor unit side is to be made on the
terminal block inside the switch box. To gain access to the
terminal block, remove the indoor unit cover and switch box
service panel, see "5.1. Opening the indoor unit" on page 10.
WARNING
Switch off all power supply – i.e. outdoor unit power
supply and backup heater and domestic hot water
tank power supply (if applicable) – before removing
the switch box service panel.
■
Cable tie mountings are provided at the bottom of the switch
box. Fix all cables using cable ties (field supply).
■
A dedicated power circuit is required for the backup heater.
■
Installations equipped with a domestic hot water tank (optional),
require a dedicated power circuit for the booster heater
Please refer to the domestic hot water tank installation manual.
(1) Only applicable for tank with built-in electrical booster heater (RKHW*).
Installation manual
19
Required
number of Maximum
conductors running current
(a)
2+GND
(b)
3+GND
(d)
2
2+GND or
(e)
3+GND
(d)
3 or 4 100 mA
(d)
2+GND 100 mA
(d)
2+GND 100 mA
(b)
4+GND
(f)
(g)
2
2+GND 13 A
(h)
2
(i)
2
(b)
2+GND
2
2
, maximum length: 50 m.
2
, maximum length: 500 m.
(1)
.
Connection of the indoor unit power supply and
communication cable
Power circuit and cable requirements
Power supply for the indoor unit is to be provided through the outdoor
unit. Data communication with the outdoor unit is provided through
the same cable.
For all guidelines and specifications regarding field wiring between
the indoor unit and the outdoor unit, please refer to the outdoor unit
installation manual.
Procedure
1 Using the appropriate cable, connect the power circuit to the
appropriate terminals as shown on the wiring diagram and the
illustration below.
2 Connect the earth conductor (yellow/green) to the earthing
screw on the switch box mounting plate.
3 Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
4 When routing out cables, make sure that these do not obstruct
mounting of the indoor unit cover, see figure 3.
Note: only relevant field wiring is shown.
X1M
1 2 3
1 2 3
1 2 3
Indoor unit for air to water heat pump system
X3M
RKHBH/X008BB
4PW62574-1 – 10.2010