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Duct Air Leakage Tester Operation Manual Ver.3
3.Installation and Assembling
According to the testing air flow range, nozzles or Matrix will be optional as the testing tool. And it’s
applicable to both air blower system and exhaust system of the air conditioning ducts. Generally speaking, take
nozzle as the tool for low flow test and take matrix as the tool for the High flow test.
3.1.Testing duct connection
Preparation before testing:
(1)
Refer to Appendix 1. Leakage testing standard for a confirmation of required testing, such as:
Leakage standard to be followed;
Air tightness / leakage class to be achieved;
Testing pressure.
(2)
Temporarily seal all the openings of the ductwork except one, which will be connected to the duct leakage
tester. Calculate the area of testing duct surface to ensure it’s available and within the input range.
Connect the testing duct to the Tester :
(1)
Position the DALT 6900 unit as close to the remaining opening in the ductwork as possible to minimize the
flexible tubing needed. Minimize bends in the flexible tubing to reduce the pressure loss, giving the best
performance.
(2)
Fit one end of the flexi-tube with adapter spigot to the6900. Make an air-tight seal using one of the over
lock straps and lever-locking cam provided. Connect the other end with flange to the testing duct required.
User need to install and connection with proper way according to the practical situation.
(3)
If the static pressure tapping on the testing duct, connect the static tube as the tapping or drill a Φ6mm hole
in the duct and insert the static tube into the duct. Seal around the hole. Connect the other end of the static
tube to the Controller cabinet.
Testing Duct
Duct Air Leakage
Tester
flexible
tubing
Static Pressure tube
