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14.5
How to Adjust Water Flow Rate [SERVICE MODE: 02]
Before adjust the water flow rate, make sure that the total water volume in the installation is 50 litres minimum for
heating side. The default setting is SPEED 3 (Only for WH-S**09*3E5 and WH-S**12*6E5) and SPEED 4 for WH-
S**14/16*6E5. Please ensure the minimum flow rate is not less than 13 l/min and not more than 50 l/min.
The available external static pressure (kPa) in function of the water flow rate (l/min) is shown in the P-Q graph.
Depend on the hydraulic system pressure loss and type, the water flow rate can be adjusted by control panel.
1.
Press SERVICE button for 5 seconds.
2.
Press ▲/▼ button to select menu S02 (PUMP SPEED ADJUST MODE) and press SET button to confirm the
menu.
3.
Press SELECT button then press ▲/▼ button to change SPEED and press SET to confirm.
4.
Press OFF/ON button to exit PUMP SPEED ADJUST MODE.
During PUMP SPEED ADJUST MODE, we can select AIR PURGE function by pressing FORCE button.
In AIR PURGE function, the pump will operate ON and OFF for 10 minutes to purge the air in the hydraulic system.
Press again the FORCE button to exit AIR PURGE function. PUMP SPEED ADJUST MODE will stop operation.
14.6
Expansion Vessel Pre Pressure Checking
Expansion Vessel with 10 L air capacity and initial pressure of 1 bar is installed in this indoor unit.
Total amount of water in system should be below 200 L.
(Note: This amount of water is not include the tank unit volume)
If total amount of water is over 200 L, please add expansion vessel.
Please keep the installation height difference of system water circuit within 10 m.
(Inner volume of same indoor unit is about 5 L)
14.7 How to Unlock Cool Mode
1.
Press buttons SET and SERVICE for 5 seconds.
2.
Press SELECT button.
3.
Unlock COOL mode with ▲/▼.
4.
Press SET button.
110.0
7
100.0
90.0
6
5
80.0
4
70.0
60.0
3
50.0
2
40.0
1
30.0
20.0
10.0
0.0
0
10
13
20
WATER FLOW RATE (L/min)
90
30
40
50
60
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