Internal Wiring - Parts Table; Field Wiring Guidelines - Rotex RKHBH016AB Manuel D'installation

Overview
The illustration below gives an overview of the required field wiring
between several parts of the installation. Refer also to "Typical
application examples" on page 3.
4
C
B D
2
1 3
A 10 9
A Single power supply for
outdoor unit, backup
heater and booster
heater
B Outdoor unit
C Backup heater
D Indoor unit
E Room thermostat (field
supply, optional)
Item Description
1 Power supply cable for outdoor
unit
2 Indoor unit power supply and
communication cable
3 Power supply cable for backup
heater
4 Room thermostat cable
5 3-way valve control cable
6 2-way valve control cable
7 Booster heater power supply
and thermal protection cable
8 Thermistor cable
9 Booster heater power supply
cable
10 Benefit kWh rate power supply
cable (voltage free contact)
(a) Refer to nameplate on outdoor unit
2
(b) Cable section 2.5 mm
(c) See table under "Connection of the backup heater power supply" on page 13.
(d) Minimum cable section 0.75 mm
(e) The thermistor and connection wire (12 m) are delivered with the domestic hot
water tank.
Installation manual
12
T
E
5
F
M
6
G
M
H
7
I
8
F 3-way valve for domestic
hot water tank (field
supply, optional)
G 2-way valve for cooling
mode (field supply,
optional)
H Domestic hot water tank
(optional)
I Booster heater
(optional)
Required
number of Maximum
conductors running current
(a)
2+GND
(b)
3+GND
(c)
2+GND or
3+GND
(d)
3 or 4 100 mA
(d)
2+GND 100 mA
(d)
2+GND 100 mA
(b)
4+GND
(e)
2
2+GND 13 A
2 (d)
100 mA
2

Internal wiring - Parts table

Refer to the internal wiring diagram supplied with the unit (on the
inside of the indoor unit switch box cover). The abbreviations used
are listed below.
A1P.................. Main PCB
A2P.................. Remote controller PCB (user interface)
A3P.................. Thermostat (field supply, PC= internal Power Circuit)
A4P.......... * ..... Remote alarm address card
E1H.................. Backup heater element 1
E2H.................. Backup heater element 2
E3H.................. Backup heater element 3
E4H..........# ..... Booster heater
F1B .................. Fuse backup heater
F2B ..........# ..... Fuse booster heater
F1T .................. Thermal fuse (250 V, 94°C)
FU1.................. Fuse 3.15 A T 250 V
FU2.................. Fuse 5 A T 250 V
FuR,FuS .......... Fuse 5 A 250 V for remote alarm PCB
K1M ................. Contactor backup heater step 1
K2M ................. Contactor backup heater step 2
K3M .........# ..... Contactor booster heater
K4M ................. Pump relay
K5M ................. Contactor for backup heater all pole disconnection
M1P ................. Pump
M2S .......## ..... 2-way valve for cooling mode
M3S .........# ..... 3-way valve: floor heating/domestic hot water
PHC1 ............... Optocoupler input circuit
Q1DI ................ Earth leakage protector
Q1L.................. Thermal protector backup heater
Q2L,Q3L ..# ..... Thermal protector booster heater
R1T.................. Outlet water heat exchanger thermistor
R2T.................. Outlet water backup heater thermistor
R3T.................. Refrigerant liquid side thermistor
R4T.................. Inlet water thermistor
R5T..........# ..... Domestic hot water thermistor
S1L .................. Flow switch
S2S.................. Benefit kWh rate power supply contact
SS1.................. DIP switch
TR1.................. Transformer 24 V for PCB
V1S.................. Spark suppression 1
V2S.................. Spark suppression 2
X1M-X4M......... Terminal blocks
* Optional
# Applications with domestic hot water tank only
## Heating/cooling applications only

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 "Opening the indoor unit" on page 5.
■
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.
Indoor unit for air to water heat pump system
RKHBH/X016AB
4PW50205-1A