Retrotec DM32 User Manual
Page 77
Page 77 of 94
©Retrotec Inc. 2014
The absolute value of FP must be greater than the minimum fan pressure, “MF”, shown in Table 8, and
greater than the calculated factor using the K2 value from the table as follows:
|𝐹𝑃| ≥ |𝑅𝑃| × 𝐾2
To determine the flow for a particular fan pressure FP:
Check that the measured value for FP meets the two conditions based on MF and K2. If so, find the N, K,
K1, and K3 values in Table xxx (based on the type of fan and the Range Configuration being used), enter
those values along with the values measured for FP, and RP into the Flow equation stated above and
calculate the result.
Table 8: N and K coefficients for all gauge supported fans.
Range
N
K
K1
K2
K3
K4
MF
DU220
Open
0.5115
30.7774
0.000
0.2
0.0
1.0
10
Mid
0.5415
5.9146
0.000
0.5
0.0
1.0
25
Low
0.6125
1.0056
-0.024
0.5
-0.0002
1.0
25
Retrotec
1000 / 2000
/ 3000 /
3000SR
Open
0.5214
519.6183
-0.070
0.8
-0.1150
1.0
8.6
A
0.5030
264.9959
-0.075
1.0
0.0
1.0
12
B
0.5000
174.8824
0.000
0.3
0.0
1.0
10
C8
0.5000
78.5000
-0.020
0.5
0.0160
1.0
10
C6
0.5050
61.3000
0.054
0.5
0.0040
1.0
10
C4
0.5077
42.0000
0.009
0.5
0.0009
1.0
10
C2
0.5200
22.0000
0.11
0.5
-0.0010
1.0
10
C1
0.5410
11.9239
0.13
0.4
-0.0014
1.0
10
L4
0.4800
4.0995
0.003
1.0
0.0004
1.0
10
L2
0.5020
2.0678
0.000
0.5
0.0001
1.0
10
L1
0.4925
1.1614
0.100
0.5
0.0001
1.0
10
Mn
DuctBlaster
Open
0.5032
108.7000
0.000
1.0
0.0
1.0
25
Ring 1
0.5038
40.5000
0.000
1.0
0.0
1.0
25
Ring 2
0.5064
15.2700
0.000
1.0
0.0
1.0
25
Ring 3
0.5140
5.8400
0.000
1.0
0.0
1.0
4
Mn Model 3
110 V
Open
0.4879
506.8000
0.000
1.0
0.0
1.0
25
A
0.4876
190.1000
0.000
1.0
0.0
1.0
25
B
0.4955
60.6700
0.000
1.0
0.0
1.0
25
C
0.5132
21.3700
0.000
1.0
0.0
1.0
15
D
0.4942
7.2160
0.000
1.0
0.0
1.0
15
E
0.5267
2.7260
0.000
1.0
0.0
1.0
15
Mn Model 3
230 V
Open
0.4918
498.9000
0.000
1.0
0
1.0
25
A
0.4889
190.1000
0.000
1.0
0
1.0
25
B
0.4958
60.3500
0.000
1.0
0
1.0
25
C
0.5178
20.4700
0.000
1.0
0
1.0
25