Kanomax DALT 6900 Operation Manual page 24

6. US Standards
No.
Fractional horsepower
1
exhaust/supply fans, and residential system
Small systems; split DX systems – usually systems under 2000
2
CFM(940l/s),and residential systems
VAV and CAV terminal boxes and associated downstream
3
ductwork
4 Single zone, multi-zone, return ducts, and exhaust duct systems
5 Chilled-beam primary supply
All ducts in chases and concealed spaces, main return ducts on
6 VAV and CAV systems, main ducts on general exhaust or outside
air systems
7 VAV and CAV terminal boxes tested with upstream ductwork
8 Supply ducts for VAV and CAV systems
9 Dual duct systems, both hot duct and cold duct
10 High pressure induction system
11 Exhaust systems for labs with air valves
12 Grease duct Systems
13 Supply, return, and exhaust ductwork located outdoors
Determine the total allowable leakage of each duct system, including the allowed leakage rate of each
component. If the entire duct system cannot be tested, determine the allowed leakage rate in a section of duct.
To do this, determine the surface area of the total duct system, and the surface area of each section of the
system to be tested.
Tested section air low rate =
Allowable leakage air low rate for tested section = Tested section air low rate × Allowable percent leakge
Duct Air Leakage Tester Operation Manual Ver.3
AABC
Type of System
fan system;
Minimum Test Pressure
fan coils, small
× Total system operating air low rate
0.50''WC(125Pa)
1.00''WC(250Pa)
1.00''WC(250Pa)
2.00''WC(500Pa)
2.00''WC(500Pa)
3.00''WC(745Pa)
4.00''WC(995Pa)
4.00''WC(995Pa)
6.00''WC(1495Pa)
6.00''WC(1495Pa)
6.00''WC(1495Pa)
4.00''WC(995Pa)
3.00''WC(745Pa)
Maximum
Allowable
Leakage
2%
2%
2%
2%
1%
1%
1%
1%
1%
0.5%
0.5%
0.0%
1%
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