Piping Diagram: Indoor Unit - Rotex HPSU Bi-Bloc Ultra Series Installer's Reference Manual

14.2

Piping diagram: Indoor unit

A
C
R2T
a2
e
C
R4T
a1
e
A Water side
B Refrigerant side
C Field installed
a1 Space heating water IN
a2 Space heating water OUT
b1 Gas refrigerant IN (heating mode; condenser)
b2 Liquid refrigerant OUT (heating mode; condenser)
c1 Liquid refrigerant IN (cooling mode; evaporator)
c2 Gas refrigerant OUT (cooling mode; evaporator)
d Plate heat exchanger
e Shut-off valve for service
f Magnetic filter/dirt separator
g Safety valve
h Air purge
i Drain valve
j Flow sensor
k Expansion vessel
l Backup heater
m Pump
RRGA04~08DAV3 + RHBX04+08DA
ROTEX HPSU Bi-Bloc Ultra
4P495262-1B – 2019.10
h
m
l
i
g
h
B1PW
f
i
B
B2PR
R1T
k
d
j
R3T
B1PW Space heating water pressure sensor
B2PR Refrigerant pressure sensor
R1T Thermistor (heat exchanger – water OUT)
R2T Thermistor (backup heater – water OUT)
R3T Thermistor (liquid refrigerant)
R4T Thermistor (heat exchanger – water IN)
Screw connection
Flare connection
Quick coupling
Brazed connection
14 Technical data
c2
b1
b2
c1
3D111541A
Installer reference guide
93