Test Of Drainage System; Installation Of Air Duct - Gree VRF Fresh Air Serie El Manual Del Propietario

4.3.3 Test of Drainage System

● Models without water pump
(1) 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 4.3.12). (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 4.3.13.
Inject water
Drain Hose Assembly
3) Check if the water drains smoothly from the drain pipe and check if there is water leakage on
the connection pipe.
4) Arrange insulation of drain hose and pipe clamp after checking the drain system.
● Models with water pump
(1) 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 4.3.12). (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 Fig 4.3.13.
(2) Start the water pump to check if water drains 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 (220V~50Hz) at L1, N or L, N of wiring board; Connect the grounding
wire securely and then put on the electric box cover after making sure it is connected
securely; 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.
(3) Check if the water drains smoothly from the drain pipe and check if there is water leakage on
the connection pipe.
(4) Arrange insulation of drain hose and pipe clamp after checking the drain system.

4.4 Installation of Air Duct

Notes:
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 away from the wall. Add a
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Multi Variable Air Conditioners Duct Type Indoor Unit
Fig 4.3.11 Fig 4.3.12
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