Gree FCU Series, Руководство по обслуживанию

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Design & Selection
56
1. Selection Principle
1.1 Selection Steps
(1) Select the unit type based on the air flow, cooling capacity and heating capacity.
(2) Select the unit model based on the indoor cold/heat load, inlet air temperature, entering water
temperature and related data sheet. The cooling/heating capacity of the selected unit should be
or larger than the indoor cold/heat load.
(3) Take consideration of noise of the building.
(4) According to the allowable noise level of the corresponding building (see the next page for more
details), check if the selected unit can meet the noise requirement)
(5) Take hydraulic calculation to the duct system and then select the proper static pressure
1.2 Allowable Noise Level for Buildings
Type of Buildings A-weighted Sound Level (dBA)
Recording studio, broadcast studio, dubbing room 20~25
Concert hall, theatre, television studio 25~30
Cinema, lecture theatre, meeting room 30~35
Office room, design office, reading room, 35~40
Restaurant, banquet hall, gym, hotel 40~50
Waiting room, shopping center 45~55
Cleaning room, office room with mechanical
appliance
55~65
It is cited from Practical Design Manual of Heating Air Conditioning. If undesirable; reselect the unit
with lower noise.
1.3 Example for Selection
For a room of some hotel, the sensible heat cooling load is 3180W, and all heat cooling load is 4090W,
the inlet air dry bulb temperature is 27
℃
，
the inlet air wet bulb temperature is 19.5
℃
, the air flow is
600m
3
/h, and the entering water temperature is 7
℃
. Based on these conditions, select a proper FCU.
See the following figure for the connection diagram of the FCU.