14 Technical data
Installer reference guide
87
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
14.4
Components
14.4.1
Components: Outdoor unit
b
c
d
e
f
j
h
i
g
a
l
k
a
Switch box main PCB (inverter and control PCB)
b
Terminal communication and power supply
c
Service PCB
d
4-way valve
e
Electronic expansion valve (main)
f
Accumulator
g
Compressor
h
Liquid stop valve
i
Gas stop valve
j
Service port
k
Fan motor
l
Heat exchanger
14.4.2
Components: Switch box (outdoor unit)
a
c
d
e
b
a
Service PCB
b
Terminal communication cable
c
Terminal power supply cable
d
Earth connection
e
Wire clamp
14.4.3
Components: Indoor unit
a
b
c
e
q
s
t
r
q
h
m
p
n
o
f
d
g
q
j
q
i
k
n
o
l
a
Switch box
Contains the main electronic and electrical parts of the
indoor unit.
b
User interface (optional)
c
Manometer
Allows readout of the water pressure in the water circuit.
d
Air purge valve
Remaining air in the water circuit will be automatically
removed via the air purge valve.
e
Expansion vessel (10 l)
f
Flow sensor
Gives feedback to the interface about the actual flow. Based
on this information (and other), the interface adjusts the
pump speed.
g
Heat exchanger
h
Water pump
Circulates the water in the water circuit.
i
Water filter
