Gree HOME GMV [220/367] Debugging of water heating

Dc Inverter VRF plus Water Heater Solution Service Manual INSTALLATION

216

mode can be executed immediately.

When the debugging has been finished, record the data and make a report to users.

15.4 Debugging of Water Heating

15.4.1 Preparation before Debugging

1. Check if the unit has been installed correctly.

2. Check if the piping of water system and the wiring of electric system are proper.

3. Check if the circulating pipe is thermal insulated

4. Check if the ground wire has been connected.

5. Check if the voltage is the rated voltage of the unit.

6. Check if the check valve and safety valve of water inlet are installed correctly.

7. Check if the air in pipeline has been exhausted and if the air outlet valve and blown down valve have been

closed.

8.The pressure of feeding water can’t be less than 0.15MPa;

15.4.2 Air Discharge inside the Pipeline

a．If the air outlet valve A in hydro-box can be easily operated:

1. Make sure that all pipes have been connected, air outlet valve and side hydrovalve have been closed and

blow-off vent has been sealed.

2. Open the ball valve for water replenishing to fill water and open the side hydrovalve.

3. If there is tap water that is outpouring, close the side hydrovalve and open air outlet A.

4. If just water flows out from the air outlet A, energize the hydro-box and press the buttons “mode” ＋“▼”

at the same time to start the water pump. In 2 min later, press these two buttons again to close the water

pump. Then, close the air outlet valve and the air discharge has been finished. Open the hydrovalve to let

water flow out for 1~2min and then close it to execute the debugging of the complete unit.

Synchronously press “Mode” and “▼” for 5s to start clean mode

b．If the air outlet valve B in hydro-box can be easily operated:

1.Make sure that all pipes have been connected, air outlet valve and side hydrovalve have been closed and

blow-off vent has been sealed.

2. Open the ball valve for water replenishing to fill water and open the side hydrovalve.

3.If there is tap water that is outpouring, close the side hydrovalve and open air outlet B.

4. If just water flows out from the air outlet B, open chack valve A, energize the hydro-box and press the

buttons “mode” ＋“▼”at the same time to start the water pump. In 2 min later, press these two buttons again to

close the water pump. Then, close the air outlet valve and the air discharge has been finished. Open the

hydrovalve to let water flow out for 1~2min and then close it to execute the debugging of the complete unit.

15.4.3 Debugging of Water Heating

Set the temp of water heating as 50℃ and record the data after 30min running of water heating.

If there is any malfunction that occurs during the running, such as temp sensor error, water flow switcherror

and fall-off of water temp sensor, please make sure that the temp sensors have been installed correctly and

then, make sure that the air has been completely discharged from the pipeline.