20 Technical data
Installation and operation manual
43
RK RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1A – 2020.10
b
Stop valve (liquid) (circuit 2: to indoor units)
c
Stop valve (liquid) (circuit 1: to heat exchanger unit)
d
Stop valve (gas) (circuit 1: to heat exchanger unit)
e
Service port (refrigerant charge)
f
Filter
g
Subcool heat exchanger
h
Pressure regulating valve
i
Capillary tube
j
Accumulator
k
Compressor accumulator
l
Heat exchanger
m
Check valve
M1C
Compressor
M1F, M2F
Fan motor
R1T (A)
Thermistor (air)
R2T (A)
Thermistor (gas)
R3T (A)
Thermistor (coil)
R2T (B)
Thermistor (discharge)
R3T (B)
Thermistor (suction accumulator)
R4T (B)
Thermistor (subcool heat exchanger gas)
R5T (B)
Thermistor (suction compressor)
R7T (B)
Thermistor (liquid)
S1NPH
High pressure sensor
S1NPL
Low pressure sensor
S1PH
High pressure switch
Y1E, Y3E
Electronic expansion valve
Y1S
Solenoid valve (4‑way valve)
Heating
Cooling
8 HP
Y2E
R21T
M1C
R3T
R5T
R6T
Y1S
S1NPL
S1PH
S1NPH
R7T
c
b
f
g
a
d
f
h
f
i
j
e
B
k
f
i
R2T
R3T
R1T
M1F
M2F
Y1E
M3F
f
f
l
A
3D104510-1
A
Heat exchanger unit
B
Compressor unit
a
Stop valve (gas) (circuit 2: to indoor units)
b
Stop valve (liquid) (circuit 2: to indoor units)
c
Stop valve (liquid) (circuit 1: to heat exchanger unit)
d
Stop valve (gas) (circuit 1: to heat exchanger unit)
e
Service port (refrigerant charge)
f
Filter
g
Subcool heat exchanger
h
Pressure regulating valve
i
Capillary tube
j
Accumulator
k
Oil separator
l
Heat exchanger
M1C
Compressor
M1F~M3F
Fan motor
R1T (A)
Thermistor (air)
R2T (A)
Thermistor (gas)
R3T (A)
Thermistor (coil)
R21T (B)
Thermistor (discharge)
R3T (B)
Thermistor (suction accumulator)
R5T (B)
Thermistor (liquid)
R6T (B)
Thermistor (subcool heat exchanger gas)
R7T (B)
Thermistor (suction compressor)
S1NPH
High pressure sensor
S1NPL
Low pressure sensor
S1PH
High pressure switch
Y1E, Y2E
Electronic expansion valve
Y1S
Solenoid valve (4‑way valve)
Heating
Cooling
20.2
Wiring diagram: Compressor unit
The wiring diagram is delivered with the unit, located on the switch
box cover.
Symbols:
X1M
Main terminal
Earth wiring
15
Wire number 15
Field wire
Field cable
**
/12.2
Connection ** continues on page 12 column 2
1
Several wiring possibilities
Option
Not mounted in switch box
Wiring depending on model
PCB
Legend for wiring diagram 5 HP:
A1P
Printed circuit board (main)
A2P
Printed circuit board (inverter)
BS*
Push button (A1P)
C*
Capacitor (A2P)
DS1
DIP switch (A1P)
F1U, F2U
Fuse (T 31.5 A / 250 V) (A1P)
F3U, F5U
Fuse (T 6.3 A / 250 V) (A1P)
H*P
LED (service monitor orange) (A1P)
HAP
Running LED (service monitor green) (A*P)
K1M
Magnetic contactor (A2P)
K1R
Magnetic relay (A*P)
L1R
Reactor
M1C
Motor (compressor)
M1F
Motor (fan)
PS
Switching power supply (A2P)
Q1DI
Earth leakage circuit breaker (field supply)
R*
Resistor (A2P)
R2T
Thermistor (discharge)
R3T
Thermistor (suction accumulator)
R4T
Thermistor (subcool heat exchanger gas)
R5T
Thermistor (suction compressor)
R7T
Thermistor (liquid)
R10T
Thermistor (fin)
S1NPL
Low pressure sensor
S1NPH
High pressure sensor
S1PH
High pressure switch