Diagram Of The Operating Principle; Operating Principle Of The Unit - Gree Versati III GRS-CQ4.0PdG/NhH2-E Owner's Manual

Air-to-water Heat Pump All in One Versati

1. Diagram of the Operating Principle

Ambient temp .
sensor
4-way High pressure
C
valve sensor
S D
E
Suction
temp .
Compressor
sensor
Low pressure switch
(cooling)
Low pressure swith
(heating)
Gas-liquid
separator

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
Defrost
temp .
sensor
T -economizer
out
Fin-tube heat
exchanger
T-economizer
in
EXV2
High pressure
switch
EXV1
Discharge
temp . sensor
Outdoor Unit
T-liquid
T-gas
pipe pipe
T -water in PE
Water pump 1
Expansion vessel
Water pressure
gauge
Tank temp 3-way
sensor valve
Automatic
relief valve
Water tank EH
All in one unit
8
SPLIT TYPE
T -water out PE
Flow switch
Optional electric heater
T -optional water sensor
Safety valve
Automatic relief valve
Water pump 2