Installation Of Air Duct - Lennox VEMD007N432U Installation Manual

5.4 Installation of Air Duct

NOTES!
① There should be insulation layer on air-out duct, air-return duct and fresh air duct to avoid
heat loss and moisture. Adhere a nail on the air duct and then add thermal sponge with a
layer of tin. Fasten it with a nail cover and then seal the junction with tin tapes; You can also
use other materials that have good insulation quality.
② Each air-out duct and air-return duct should be fixed on a pre-made board with iron frame.
The junction of air duct should be well-sealed in order to prevent air leakage.
③ The design and construction of air duct should comply with national requirements.
④ The edge of air-return duct is suggested to be more than 150mm away from the wall. Add a
filter to the air-return opening.
⑤ Please consider noise-damping and vibration damping for the design and construction of air
duct. Besides, noise source must be away from people. For instance, do not have the
air-return opening installed on top of the user (offices, rest area, etc.).
5.4.1 Installation of Air-out Duct
(1) Installation of Rectangular Duct
No.
1
2
3
4
(2) Installation of Circular Duct
Name
Hanger Rod
Return Air Duct
Canvas Duct
Return Air Inlet
Multi Variable Air Conditioners Duct Type Indoor Unit
Fig 5.4.1
No.
5
6
7
8
Fig 5.4.2
16
Name
Static Pressure Box
Filter Screen
Main Supply Air Duct
Supply Air Outlet