Multi Variable Air Conditioners Ducted Type Indoor Unit
14
Models without water pump
(1) Inject some water to the water tray of indoor unit as following:
1) Connect the drain hose to the other drain connection pipe of water tray and inject
approximately 1L water. (Remove the drain hose after finishing testing and then put on
the plug of water tray) .
2) Spray 1L water on evaporator with sprayer.
Fig.4.3.11
(2) Check if the water drains smoothly from the drain pipe and check if there is water leakage on
the connection pipe.
(3) Arrange insulation of drain hose and pipe clamp after checking the drain system.
4.4 Installation of Air Duct
① There should be insulating 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 (5-7/8 inch) 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.).
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