Diagram Of The Operating Principle; Operating Principle Of The Unit - Gree Versati III GRS-CQ8.0Pd/NhH-M Owner's Manual

Air-to-water Heat Pump Split Versati

1. Diagram of the Operating Principle

Outdoor Unit
Ambien temp sensor
heat exchanger
C
High pressure 4-wayv alve
sensor
D
S
High pressure
switch
E
Discharge
temp sensor
Compressor
Suctiont emp.
Low pressure Low pressure
switch(heating)
switch(cooling)
Gas-liquid
separator
Notes
(a) Water mixing accessories are optional parts. When they are required, please contact the manufacturer.
(b) The 3-way valve to be installed on site should be controlled by the user.

2. Operating Principle of the Unit

DC Inverter Air to Water Heat Pump is composed of outdoor unit, indoor unit and internal-fan coil water tank.
Operation functions:
(1) Cooling;
(2) Heating;
(3) Water heating;
(4) Cooling + water heating;
(5) Heating + water heating;
(6) Emergency mode;
(7) Quick water heating;
(8) Holiday mode;
(9) Forced Operation Mode;
(10) Quiet mode;
(11) Disinfection mode;
(12) Weather-dependent Operation;
(13) Floor debugging;
(14) Air removal of the water system;
(15) Other thermal.
Cooling: in cooling mode, the refrigerant is condensed in the outdoor unit and evaporated in the indoor unit. Via
the heat exchange with water in the indoor unit, the temperature of water decreases and it releases heat while the
refrigerant absorbs heat and evaporates. With the help of wired controller, the outflow temperature can meet the
user's requirement. Through the control of valve, the low-temperature water in the system is connected with indoor
fan coil and underground pipe, and exchanges heat with the indoor air so that the indoor temperature decreases to
the required range.
Heating: in heating mode, the refrigerant evaporates in the outdoor unit and is condensed in the indoor unit.
Via the heat exchange with water in the indoor unit, the water absorbs heat and its temperature increases while the
refrigerant releases heat and is condensed. With the help of wired controller, the outflow temperature can meet the
user's requirement. Through the control of valve, the high-temperature water in the system is connected with indoor
fan coil and underground pipe, and exchanges heat with the indoor air so that the indoor temperature increases to
the required range.
Fan
Defrost temp
sensor
Fin-tube
A B
EXV1
EXV2
T-economizer in
T-economizer out
sensor
Indoor Unit
Safety
vavle
Optional
T-watero ut T-optional 3-way
T-liquid pipe E-heater
PE water sensor valve
Heating
T-water in Flow Expansion
Water
PE switch vessel
T-gas pipe
pump
8
Field Supply
Other thermal
3-way
2-way
valve
valve
DHW
Mixing
valve
Water tank
SPLIT TYPE
Floor temp
sensor
Water pump
Tank temp sensor
Electric heater