Cable Requirements; Internal Wiring - Parts Table - Rotex RKBUHAA6V3 Manuel D'installation Et D'utilisation

Cable requirements

Cable
Item bundle Description
1 PS Power supply
2 HV Indoor unit
control signal
(High Voltage)
3 LV Heater kit error
feedback signal
(Low Voltage)
(a) Refer to the nameplate of the heater kit
(b) Minimum cable section is 0.75 mm
Refer to the chapter "Field wiring" of the RKHBRD indoor unit
installation manual for details where to use high voltage (HV) and low
voltage (LV) cables.
CAUTION
Select all cables and wire sizes in accordance with
relevant local and national regulations.

Internal wiring - Parts table

Refer to the internal wiring diagram supplied with the heater kit (on
the inside of the heater kit). The abbreviations used are listed below.
Part number
A8P # RKRP1AHTA demand PCB (Indoor unit option)
E1H, E2H, Backup heater elements
E3H
F1B, F2B Fuse backup heater (20 A 400 V)
F1U Fuse (5 A T 250 V)
F1T Thermal fuse backup heater
K1A Time relay (on-delay)
K2A Auxiliary relay
K1M, K2M Contactor backup heater step
K5M, K6M Contactor for backup heater (all pole disconnection)
S1L Flow switch
Q1DI # Earth leakage protector
Q1L Thermal protector backup heater (manual reset)
Q2L Thermal protector inlet water (automatic reset)
R1 Inline resistor for flow switch
X1M, X2M Terminal strip
X801M PCB terminal strip
# Field supply
RKBUHAA6V3+W1
Heater kit for air to water heat pump system
4PW58904-1
Required number of
Maximum
conductors
running
1~ 3N~ current
2 + GND 4 + GND (a)
3 3
(b)
2 2
(b)
2
Description
Procedure
Connections to be made in the heater kit
1 Using the appropriate cable, connect the power supply cable
and communication cables to the appropriate terminals.
Use a dedicated power circuit for the heater kit. Never
use a power circuit shared by another appliance.
NOTE The heater kit needs to be connected to a normal
power supply. Connecting the heater kit to a
benefit kWh rate power supply can result in errors
between the heater kit and indoor unit. For details
on benefit kWh rate power supplies, refer to the
indoor unit installation manual.
Refer to the wiring diagram sticker on the inside of the heater kit
front panel.
NOTE The electrical connection diagram can be found
on the inside of the switch box cover.
2 Fix the cables with the cable ties inside the heater kit.
Make sure to ensure strain relief of the cable by correct use of
the PG nipples and nut (provided with the accessory bag).
Connections to be made in the RKHBRD indoor unit switch box
NOTE To connect the heater kit to the indoor unit, the
RKRP1AHTA PCB (demand PCB) must be installed in
the indoor unit switch box. This is an optional PCB for
the indoor unit and not included with the heater kit.
For details on connecting signals to the indoor unit refer to the
chapters "Overview of the indoor unit" and "Electrical wiring work" of
the indoor unit installation manual.
1 Connect the indoor unit control signal to X2M 14, 15, 16.
2 Connect the heater kit error feedback signal to X801M 2, 5 of the
demand PCB.
NOTE
Only relevant wiring is shown.
Installation and operation manual
6