Operating Principle Of The Unit - Gree EVO Série Manuel D'utilisateur

Mini Chiller
No. Name
1
Inverter compressor
Discharge temperature
2
sensor
3
High-pressure switch
4
High pressure sensor
5
4-way valve
6 Finned heat exchanger
Environment
7
temperature sensor
Defrosting temperature
8
sensor
9
Filter

4 Operating Principle of the Unit

The Mini chiller is composed of the monobloc unit. Operation functions include:
(1) Cooling;
(2) Heating;
(3) Emergency mode;
(4) Holiday mode;
(5) Forced Operation Mode;
(6) Quiet mode;
(7) Weather-dependent Operation;
(8) Floor debugging;
(9) Air removal of the water system;
(10) Operation of backup heat source
Cooling: in cooling mode, refrigerant is condensed in the aluminum fin-copper tube and
evaporated in the plate heat exchanger. Via heat exchange with water in the plate heat exchanger,
the temperature of water decreases and it releases heat while the refrigerant absorbs heat and
evaporates. With the help of the wired controller, the outflow temperature can meet the user's
requirement. Through control of valves, the low-temperature water in the system can reach the
indoor fan coil and underground pipes, and exchanges heat with the indoor air so that the indoor
temperature decreases to the required range.
Heating: in heating mode, refrigerant evaporates in the aluminum fin-copper tube and is condensed
in the plate heat exchanger. Via heat exchange with water in the plate heat exchanger, the water
absorbs heat and its temperature increase while the refrigerant releases heat and is condensed. With
the help of the wired controller, the outflow temperature can meet the user's requirement. Through
the control of valve, the high-temperature water in the system can reach the indoor fan coil and
underground pipes, and exchanges heat with the indoor air so that the indoor temperature increases
to the required range.
Emergency mode: this mode is only available for heating. When the monobloc unit stops due to
malfunction, it will enter the corresponding emergency mode; At the heating mode, after entering the
emergency mode, only when the electric heater has been installed, can heating be aviablle, otherwise
heating fails. When the setting outflow temperature or indoor temperature is reached, the electric
heater will stop running.
Holiday mode: this mode is only available for heating mode. This mode is set to keep indoor
temperature or leaving water temperature in a certain range so as to prevent water system of the unit
No. Name
10
EXV 1
11
Flasher
12
Pressure sensor
13
Solenoid valve
14
EXV 2
15 Pressure sensor
Suction temperature
16
sensor
Outlet water
17 temperature sensor
(plate heat exchanger)
Outlet temperature
18
sensor (auxiliary heater)
No. Name
19
Expansion tank
20
Safety valve
21
Flow switch
22
Water pump
23
Outlet pipe connector
24 Inlet pipe connector
25 Filter
Inlet temperature
sensor
26
(plate heat
exchanger)
27
Water separator
5
No. Name
28
2-way valve
29
Floor radiator
30
Water collector
31
FCU
32
By-pass valve
33 Vapor liquid separator
34 Plate heat exchanger
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