Retrotec DM-2A Instrukcja Użytkownika Pobierz pdf (Strona 55)

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Appendix A: System Flow Equations for all Devices

The following equation can be used to determine flow, using the variables listed in the table below.

Each fan has a different flow equation, incorporating N and K values related directly to that particular

fan.

 



   









   



where: FP is the fan pressure, and CR is the corrected room pressure

Note: CR can be determined by subtracting bias pressure from room pressure, by using the “Baseline”

feature on the DM-2, or by retrieving corrected pressure from FanTestic.

To determine the fan flow for a particular fan pressure, insert the values for FP, CR, and the N and K

values (based on the type of fan and its Range Plate/Range being used).

The Fan Pressure (FP or "PrB" reading on the DM-2) must be greater than the minimum Fan Pressure,

“MF” in the Table 8, and greater than (PrA*K2)

Table 8. N and K coefficients for all DM-2 supported fans.

Range

DU220

Open

0.5115

30.7774

0.000

0.2

0.0000

Mid

0.5415

5.9146

0.000

0.5

0.0000

Low

0.6125

1.0056

-0.024

0.5

-0.0002

Retrotec

1000 / 2000 /

3000 /

3000SR

Open

0.5214

519.6

-0.070

0.8

-0.1150

8.6

0.5030

265.0

-0.075

1.0

0.0000

0.5000

174.8824

0.000

0.3

0.0000

0.5000

78.5000

-0.020

0.5

0.0160

0.5050

61.3000

0.054

0.5

0.0040

0.5140

39.3000

0.080

0.5

0.0005

0.5500

20.0000

0.139

0.5

-0.0027

0.5410

11.9239

0.122

0.4

0.0000

0.4800

4.0995

0.003

1.0

0.0004

0.5020

2.0678

0.000

0.5

0.0001

0.4925

1.1614

0.100

0.5

0.0001

DuctBlaster

Open

0.5032

108.7000

0.000

1.0

0.0000

Ring 1

0.5038

40.5000

0.000

1.0

0.0000

Ring 2

0.5064

15.2700

0.000

1.0

0.0000

Ring 3

0.5140

5.8400

0.000

1.0

0.0000

Mn Model 3

110 V

Open

0.4879

506.8000

0.000

1.0

0.0000

0.4876

190.1000

0.000

1.0

0.0000

0.4955

60.6700

0.000

1.0

0.0000

0.5132

21.3700

0.000

1.0

0.0000

0.4942

7.2160

0.000

1.0

0.0000

0.5267

2.7260

0.000

1.0

0.0000

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