Riello 20161608, Installation And Technical Service Instructions

Page: 12 / 68

12
GENERAl INfORMAtION
1.11 Refrigerant circuit and sensors positioning
The cooling circuit is of the heat pump type with cycle inversion
on the refrigerant gas. The source fluid used is the external air
while the user fluid is water possibly added with antifreeze liq-
uid.
In winter the heat pump extracts the thermal energy from the
outside air and transfers it to the user fluid by heating it, while in summer the cycle is inverted and the thermal energy is ex-
tracted from the water, which cools down, and is transferred to
the air. external.
Depending on the type of system, the user fluid is sent to fan
coil units, air treatment units, radiant panels for room air condi-
tioning or to the boiler for the production of domestic hot water.
1 Compressor
2 Cycle reversal valve
3 Plate heat exchanger
4 Collector
5 Electronic expansion valve
6 Condenser coil
7 Intake separator
8 Service valva
9 Electric fans
A Circulation pump
B Safety valve
C Flow switch
D Expansion vessel
E Air bleed
f Hydronic module
• Probes
to outside air temperature
tl higher finned coil temperature
te lower finned coil temperature
td gas delivery temperature
ts suction temperature
TR coolant temperature
LWT water delivery temperature
EWT return water temperature
(1)
Only model 011 - 015
(2) P024 and P027 only model 011 -
015