IOM / ROOF-TOP FLEXY™ Series - Page 25
AIRFLOW BALANCING
EXAMPLE
The unit used for this example is a
FHK 060N
with standard supply and return airflow configuration. It is also fitted with an
economiser and an electric heater type H.
It is fitted with a
AT 18-18
fan which curve is shown on page xxx and a 2.2 kW motor.
- Motor rpm : 1430 rpm
- cos
ϕ
= 0.81
- Voltage = 400 V
- Current = 4,68A
P
mech fan
= V x I x
√√√√√
3 x cos
ϕ
ϕ
ϕ
ϕ
ϕ
x
ηηηηη
mech motor
x
ηηηηη
Transmission
= 400 x 4.68 x
√√√√√
3 x 0.81 x 0.76 x 0.9
= 1,79 kW
The unit is also fitted with a transmission kit 1
- Fixed Fan pulley : 250 mm
- Motor adjustable pulley type "8450" opened 1 turn from fully closed or measured distance between pulley end plates is
21,8 mm: from table xxx it can be determined that the motor pulley has a diameter of 111,8 mm
rpm
FAN
=
rpm
MOTOR
x
D
M
/
D
F
= 1430 x 118,2 / 250 =
640 rpm
Using the fan curve below the operating point can be located.
It can be determined that the fan is providing approximately
12 000 m
3
/h
with a total pressure P
TOT
=
420 Pa
640
420
12
10
1.79
Hd (mmH2O)
AT 18-18
The pressure losses in the unit are the
sum of all pressure drops across the
different parts of a unit :
- Coil and filter (measured) = 105 Pa
- Options = 6 Pa for economiser and
8 Pa for electric heater H
∆
P = 105 + 6 + 8 =
119 Pa
The dynamic pressure at 1200m
3
/h is
given at the bottom of the fan curve
Pd =
100 Pa
The external static pressure available is
therefore
ESP
= P
TOT
- Pd -
∆
PI
NT
= 420 - 100 - 119 =
201 Pa
Figure 24
Summary of Contents for ROOFTOP FLEXY FCA 100
Page 1: ...INSTALLATION OPERATING MAINTENANCE MANUAL ROOFTOP FLEXY English August 2003 ...
Page 2: ......
Page 33: ...IOM ROOF TOP FLEXY Series Page 31 AIR FLOW BALANCING AT 12 12 FAN ...
Page 34: ...Page 32 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING AT 15 15 FAN ...
Page 35: ...IOM ROOF TOP FLEXY Series Page 33 AIR FLOW BALANCING AT 18 13 ...
Page 36: ...Page 34 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING AT 18 18 FAN ...
Page 37: ...IOM ROOF TOP FLEXY Series Page 35 AIR FLOW BALANCING RDN 450 FAN ...
Page 38: ...Page 36 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING ADN 355 FAN ...
Page 39: ...IOM ROOF TOP FLEXY Series Page 37 AIR FLOW BALANCING ADN 400 FAN ...
Page 40: ...Page 38 IOM ROOF TOP FLEXY Series AIR FLOW BALANCING ADN 450 FAN ...
Page 104: ...Page 102 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS MAIN CURRENT DIAGRAM ...
Page 106: ...Page 104 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS CLIMATIC CONTROLLER ...
Page 108: ...Page 106 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS CLIMATIC INPUT FG FD ...
Page 112: ...Page 110 IOM ROOF TOP FLEXY Series ELECTRICAL WIRING DIAGRAMS GAS BURNER 180 Kw ...
Page 132: ...Page 130 IOM ROOF TOP FLEXY Series ISO 9001 CERTIFICATION ...
Page 133: ...IOM ROOF TOP FLEXY Series Page 131 PED CERTIFICATION OF CONFORMITY ...
Page 134: ...Page 132 IOM ROOF TOP FLEXY Series GLASS WOOL FIRE CLASS ...
Page 135: ...IOM ROOF TOP FLEXY Series Page 133 33 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 136: ...Page 134 IOM ROOF TOP FLEXY Series 60 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 137: ...IOM ROOF TOP FLEXY Series Page 135 120 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 138: ...Page 136 IOM ROOF TOP FLEXY Series 180 kW GAS BURNER CE CERTIFICATION OF CONFORMITY ...
Page 139: ...IOM ROOF TOP FLEXY Series Page 137 INSULATION FIRE CLASS ...
Page 140: ...Page 138 IOM ROOF TOP FLEXY Series INSULATION FIRE CLASS ...
Page 141: ......