York MBC-MBH 25, Installation & Owner'S Manual

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FAN SPEEDS
For ducted installations, check airflow and static pressure against values shown in the following diagrams.
Insufficient airflow can cause operating problems such as icing which may damage the compressor in the
outdoor unit.
FAN CURVES : High Static Blower (50Hz)
Fan Performance MBC-MBH 25
250
200
150
100
50
0
1200 1300
345 375 405 430 460 485 515 540 570 600
L/S
CMH
1400 1500 1600 1700
Airflow
1800 1900 2000 2100 2200
A
vailable Ext. Static (Pa)
HI
ME
LO
Fan Performance MBC-MBH 45
300
250
200
150
100
50
0
1400 1600
415 470 530 585 640 695 750 805 860
L/S
CMH
Airflow
1800 2000 3200 2200 2400 2600 2800 3000
A
vailable Ext. Static (Pa)
HI
ME
LO
Fan Performance MBC-MBH 35
250
200
150
100
50
0
1400 1600 1800
415 470 525 580 635 690 745 800
L/S
CMH
2000 2200
Airflow
2400 2600 2800 3000
A
vailable Ext. Static (Pa)
HI
ME
LO
Fan Performance MBC-MBH 50
300
250
200
150
100
50
0
1500
Airflow
1900
470 580 690 800 910 1020
2300 3900 3500 3100 2700
A
vailable Ext. Static (Pa)
HI
ME
LO
L/S
CMH
Fan Performance MBC-MBH 55
300
250
200
150
100
50
0
1500 1800
455 540 625 710 795 880 965 1050
2100 2400 2700 3000 3300 3600 3900
Airflow
A
vailable Ext. Static (Pa)
HI
ME
LO
L/S
CMH
Fan Performance MBC-MBH 65
350
300
250
200
150
50
0
100
1500 1000 2000
345 485 625 765 905 1045
2500
3000 3500
4000
Airflow
A
vailable Ext. Static (Pa)
HI
ME
LO
L/S
CMH