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Start-Up
70
CLCH-SVX013B-EN
Maintenance
For a typical HVAC environment - especially with upstream
filtration - there should be little to no required
maintenance. In extreme cases or for mishaps (bearing
grease in the taps for example), the flow meter is easily
cleanable. The fan inlet airflow measuring system is
extremely simple: a few pressure taps, a few fittings, and
some tubing. Although unlikely, if any tap were to get
clogged, simply disconnect each side of the transmitter
and blast air in a reverse direction through the system.
Constant K Factor
The constant K factor is unique for each fan and is
primarily a function of the area and other geometric
properties of the fan inlet. Pre-engineered factors are
available from the factory for fan types where the airflow
measurement system is available.
Table 15. Constant K Factors
Fan Size (inches)/Type
Fan Class
Fan Name
K-Factor
10.50 AF direct-drive plenum
Any
10 TF, 10 TR, 10 UF, 10 UR
576
12 AF direct-drive plenum
Any
12 TF, 12 TR, 12 UF, 12 UR
945
13.50 AF direct-drive plenum
Any
13 TF, 13 TR, 13 UF, 13 UR
965
15 AF direct-drive plenum
Any
15 TF, 15 TR, 15 UF, 15 UR
1227
16 AF direct-drive plenum
Any
16 TF, 16 TR, 16 UF, 16 UR
1519
18 AF direct-drive plenum
Any
18 TF, 18 TR
1822
20 AF direct-drive plenum
Any
20 TF, 20 TR
2186
22 AF direct-drive plenum
Any
22 TF, 22 TR
2714
24 AF direct-drive plenum
Any
24 TF, 24 TR
3285
27 AF direct-drive plenum
Any
27 TF, 27 TR
3998
30 AF direct-drive plenum
Any
30 TF, 30 TR
4945
15.70 motorized impeller
Any
15VP
1747
17.70 motorized impeller
Any
17VP
2231
19.70 motorized impeller
Any
19VP
2612
22.00 motorized impeller
Any
22VP
3233
24.80 motorized impeller
Any
24VP
4071
Note:
This table to be used for the updated tap design - mid-2014 and beyond. Refer to prior editions of this publication for the previous design.
Summary of Contents for Performance Climate Changer PSCA
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