RKHBRD011~Y1
Indoor unit for air to water heat pump system
4PW61218-1C – 2012.06
Installation manual
16
R5T............................ Leaving water thermistor
R6T............................ Discharge thermistor
R7T............................ Liquid thermistor R134a
R8T............................ Fin thermistor
RC (A*P).................... Receiver circuit
S1PH ......................... High pressure switch
S1S............................ Benefit kWh rate power supply contact
(field supply)
S3S............................ Mixing station input 1 (field supply)
S4S............................ Mixing station input 2 (field supply)
SS1 (A1P).................. Selector switch (emergency)
SS1 (A2P).................. Selector switch (master/slave)
SS1 (A7P).................. Selector switch (optional)
TC (A*P) .................... Transmitter circuit
T1R,T2R (A*P) .......... Diode bridge
T3R......................* .... Power module
V1C~V8C ............* .... Ferrite core noise filter
V1C~V12C ......... # .... Ferrite core noise filter
X1M~X3M.................. Terminal block
X1Y~X4Y ................... Connector
X*M (A*P) .................. Terminal block on PCB (optional)
Y1R............................ 4-way valve
Z1F~Z5F (A*P) .......... Noise filter
*
V1 models only
#
Y1 models only
System overview of field wiring
■
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 blocks, remove switch box service panel. Refer to the
unit switch box cover for instructions how to remove this panel
and gain access to the inside of the switch box.
■
Cable tie mountings are provided at the wiring entries of the
switch box. See "Switch box main components" on page 8.
Connection of the indoor unit power supply and
communication cable(s)
Cable requirements
Procedure
1
Open the unit and put the switch box in front of the unit as
described in "Opening the unit" on page 36.
2
Open the switch box cover.
3
Using the appropriate cable, connect the power supply and
communication cable(s) to the appropriate terminals as shown
on the wiring diagram and according to figure 3.
NOTE
■
The electrical connection diagram can be found
on the inside of the switch box cover.
■
Install the indoor and outdoor unit, power supply
cable and communication cable(s) at least 1
meter away from televisions or radios to prevent
image interference or noise.
(Depending on the radio waves, a distance of 1
meter may not be sufficient to eliminate the
noise.)
Item
Cable
bundle Description
Required number
of conductors
Maximum
running
current
In case of normal kWh rate power supply
installation
1~
3~
1
PS
Normal kWh rate power
supply
2+GND
4+GND
(b)
(b) Refer to the nameplate on the indoor unit.
In case of benefit kWh rate power supply
installation
1~
3~
1
PS
Normal kWh rate power
supply
2+GND
2+GND
1.25
2
PS
Benefit kWh rate power
supply
2+GND
4+GND
(b)
–1.25
3
LV
Outdoor unit communication
(F1/F2)
2
2
(c)
(c) Minimum cable section 0.75 mm
2
.
4
LV
Standard remote controller
(P1/P2)
2
2
(c)
5
LV
Secondary remote controller
(P1/P2)
(a)
(a) Optional
2
2
(c)
6
LV
Domestic hot water tank
thermistor (R2T)
(a)
2
2
(d)
(d) This device and connection cable is delivered with the domestic hot water tank.
7
LV
External room thermostat
signal ON/OFF
(a)
2
2
100 mA
(c)
8
LV
Benefit kWh rate power
supply switch (S1S)
(a)
2
2
100 mA
(c)
9
LV
Multiple set point signal 1
(a)
2
2
100 mA
(c)
10
LV
Multiple set point signal 2
(a)
2
2
100 mA
(c)
11
LV
Heater kit signal
(a)
Refer to the installation manual
of the heater kit
12
HV
Bottom plate heater (E7H)
(a)
2
2
0.5 A
(c)
13
HV
3-way valve (K1S)
(a)
3
3
(d)
14
HV
External room thermostat
power supply
(a)
2
2
100 mA
(c)
15
HV
Heater kit control
(a)
Refer to the installation manual
of the heater kit
PS = Power supply (see figure 3)
LV = Low voltage (see figure 3)
HV = High voltage (see figure 3)
NOTE
Select all cables and wire sizes in accordance with
relevant local and national regulations.
After finishing the electric work, confirm that each electric
part and terminal inside the electric parts box is connected
securely.
■
To avoid receiving electric noise, be sure that the
cables are put in the correct bundle and routed in
the correct bundle tray as shown in figure 3.
■
When wiring, route the cable bundles that are
outside the unit away from each other by at least
25 mm in order to avoid receiving electric noise
(external noise).
■
Be sure to route all cables between the unit side
plate and the wiring retention bar as shown in
figure 3.
