Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
12
connection pipe.
3
Arrange insulation of drain hose and pipe clamp after checking the drain system.
Models with water pump
4
Fill 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 fill about 1L water (as
shown in 4.3.11). (Remove the drain hose after finishing testing and then put on the plug of water
tray.)
2) Spray 1L water on evaporator with sprayer, as shown in 4.3.12.
1
Start the water to check if water drain smoothly. The starting method of water pump is as below.
1) If project debugging of unit has been done, please set the indoor unit in cooling or dry mode. In this
case, the water pump will operate automatically.
2) If electrical wiring of unit hasn’t been done, please open the electric box cover. Connect one phase
power cord at L1, N or L, N of wiring board; About 60s after connecting power supply, indoor unit will
report “C0” communication malfunction. In this case, the water pump will automatically operate for
10min and then stop; After checking the drain system, please cut off power supply, disconnect
power cord and then put on the electric box cover.
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
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.).
4.4.1 Installation of Air-out Duct
1
Installation of Rectangular Duct
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