Gree GRS-CQ10Pd/NhG-M - Operation Conditions; Flowchart of Model Selection; Design Principle; Selection of the Underfloor Coils

Unit Control
2.2 Operation Conditions
Capacities and power inputs are based on the following conditions (floor heating /cooling )
a. Cooling conditions
b. Heating conditions
Indoor Water Temp 23°C/18°C;
Indoor Water Temp 30°C/35°C;
Outdoor Air Temp 35°C DB/24°C WB
Outdoor Air Temp 7°C DB/6°C WB
Capacities and power inputs are based on the following conditions (FCU or radiator)
a. Cooling conditions
b. Heating conditions
Indoor Water Temp 12°C/7°C;
Indoor Water Temp 40°C/45°C;
Outdoor Air Temp 35°C DB/24°C WB
Outdoor Air Temp 7°C DB/6°C WB
2.3 Flowchart of Model Selection
2.4 Design Principle
 Cooling: capacity of the unit ≥ cooling load of the air conditioning
 Heating: capacity of the unit ≥ max{ heating load, floor heating load, water heating load}
 Water Tank: it should be selected based on the sanitary outfit or quantity of users. Each unit
can accommodate only one water tank.
3 Selection of the Underfloor Coils
3.1 Calculation of Unit Load for Floor Heating
Empirical Values of Floor Heating Load Per Square Meter
House W/m
2
Dining Room
100~120
Mater Room
100~110
Guest Room
110~130
Study Room
90~110
Villa W/m
2
Dining Room
110~140
Mater Room
100~120