Air pressure drop
Selection of a ductable unit
The 30RQSY ranges are designed for indoor installation in a plant room . For this type of installation the cold or hot air leaving the air-cooled air heat exchangers is discharged by the fans to the outside of the building , using a duct system .
Selection based on the pressure drop
The cooling and heating capacities are given for an available pressure of 160 Pa and for a unit without filter .
HEATING
The units are equipped with fans with available pressure , designed to operate with air discharge ducts with maximum pressure drops of 180 Pa or 240 Pa on certain sizes .
To compensate for these pressure drops this range of ductable units equipped with variable-speed fans with a maximum speed of 19 r / s .
In the cooling mode , the full-load or part-load speed is controlled by a patented algorithm that permanently optimises the condensing temperature to ensure the best unit energy efficiency ( EER ) whatever the operating conditions and pressure drops of the system ductwork .
In the heating mode , the full-load or part-load speed of each circuit is fixed and at the configured maximum ( range configurable from 12 r / s to 19 r / s ) based on the constraints and characteristics of the installation site . The maximum configured speed applies to both the heating and cooling mode .
Each refrigerant circuit ( A and B ) must have a separate ducting system to prevent any air recycling between the air heat exchangers of the different refrigerant circuits .
To collect the defrost water from the coils in the heating mode , 30RQSY units must be installed on an appropriate surface to permit efficient condensate drainage and evacuation and to p revent any risk of flooding at the site . A condensate collection pan is available for 30RQSY 039- 078 units .
To calculate the performances at other pressure drops please use the correction factors below .
Cooling mode
30RQSY 039-050 / 30RQSY 080-120
Duct pressure drop
Fan speed , r / s
Power input coefficient
Cooling capacity coefficient
0 |
12.00 |
0.943 |
1.019 |
50 |
13.33 |
0.962 |
1.012 |
100 |
14.66 |
0.980 |
1.006 |
130 |
15.46 |
0.990 |
1.003 |
160 |
16.26 |
1.000 |
1.000 |
200 |
17.31 |
1.012 |
0.998 |
240 |
18.36 |
1.023 |
0.996 |
30RQSY 060-078 / 30RQSY 140-160
Duct pressure drop
Fan speed , r / s
Power input coefficient
Cooling capacity coefficient
0 |
15.83 |
0.929 |
1.018 |
50 |
16.81 |
0.944 |
1.016 |
100 |
17.78 |
0.964 |
1.014 |
130 |
18.36 |
0.978 |
1.011 |
160 |
18.36 |
1.000 |
1.000 |
180 |
18.36 |
1.019 |
0.991 |
Heating mode
30RQSY 080-120
Duct pressure drop
Fan speed , r / s
Power input coefficient
Heating capacity coefficient
0 |
18.36 |
0.990 |
1.016 |
50 |
18.36 |
0.990 |
1.012 |
100 |
18.36 |
0.990 |
1.009 |
130 |
18.36 |
1.000 |
1.005 |
160 |
18.36 |
1.000 |
1.000 |
200 |
18.36 |
1.000 |
0.994 |
240 |
18.36 |
1.010 |
0.981 |
30RQSY 140-160
Duct pressure drop
Fan speed , r / s
Power input coefficient
Heating capacity coefficient
0 |
18.36 |
1.000 |
1.026 |
50 |
18.36 |
1.000 |
1.020 |
100 |
18.36 |
1.000 |
1.011 |
130 |
18.36 |
1.000 |
1.007 |
160 |
18.36 |
1.000 |
1.000 |
180 |
18.36 |
1.001 |
0.993 |
Note : Pressure drop , clean filter = 6 Pa Pressure drop , dirty filter = 12 Pa
490
C A R R I E R 2 0 1 6 / 2 0 1 7