Evacuation Of Water Tank And User Side Pipeline; Re-Evacuation - Gree GMV-S120WL/A-S Service Manual

（4） When water flows out from air outlet valve A, energize the hydro box and turn on cleaning
mode to start evacuation. The operation method is: Under OFF status of hydro box, press and
hold "WATER/AC/FLOOR" for 5s and then "Clean‖ is lit up.
（5）After running for 15~20 minutes, observe the air outlet valve that connects with hydro
box during exit pipe engineering construction. When water is flowing out steadily with no air flow, it
means evacuation is completed. Then you can close the manual air outlet valve A and stop the
hydro box. The operation method is: Press and hold "WATER/AC/FLOOR" for 5s and hydro box
will stop cleaning. "Clean" goes off.

4.1.2.2.3 Evacuation of Water Tank and User Side Pipeline

（1）Make sure each pipe joint of water tank is well connected and the blow down valve of
water tank is closed completely.
（2）Open the water replenishing valve of water tank and the water valve at user side. Fill
water into the tank until there is water coming out from the water valve at user side without any air
flow. Then water tank has finished water filling and evacuation. Close the water valve at user side
and go on with commissioning of the entire unit.

4.1.2.2.4 Re-evacuation

After all the wires of indoor units, outdoor unit and hydro box are connected and the
commissioning of fluorine system is finished, perform evacuation again. Following is the operation
procedure:
（1）Open the hot water tap and water replenishing valve of water tank to fill water inside until
water temperature reaches 20~30℃.
（2）Turn on water heating mode and open manual air outlet valve A in the meantime.
（3）After 15~20 minutes of operation, if the temperature difference between entering water
temperature and leaving water tempearture of hydro box is smaller than 10℃, it means evacuation
is completed. Then you can close the manual air outlet valve A and stop the hydro box.
Evacuation of water system is done.
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