GMV5 Home DC Inverter Multi VRF Units
205
（
4
）
Above operation procedure must be done on the condition that water tank water temperature
is lower than 45
℃
. If temperature difference of hydro box cannot satify the required value when
water tank temperature reaches 45
℃
, turn off the unit. Then open the hot water tap and fill hot
water into the water tank through the water replenishing valve until water temperature reaches
20~30
℃
. After that, turn on heating mode and open manual air outlet valve A again to perform
evacuation.
Warning: Water pump is set to before ex factory. Never try to change the setting,
otherwise, water pump will get damaged and unit will have malfunction.
4.1.3 Settings of Floor Heating Performer and Indoor Unit
Please refer to the previous section.
4.1.4 Capacity Setting of Water Tank
Please refer to the previous section.
4.1.5 Test Operation
Test operation of hydro box should be conducted simultaneously with test operation of
outdoor unit. Please refer to the following section about commissioning of the entire unit.
4.2 Commissioning Operation of the Entire Unit
4.2.1 Preparation for Test Operation
1) Power can be turned on only after all installation work is finished.
2) All control circuits, electric wires are connected correctly and securely. Gas pipe valve
and liquid pipe valve are open completely.
3) All fragmental objects, such as metal scrap, wire stub and clamp, should be removed
from the unit.
4) Check if the surface and pipes of unit are damaged during transportation or carrying.
5) Check if the wiring terminals of electric components are loosened or not. Check if the
phase sequence is correct.
6) Check the opening and closing status of valves. After outdoor unit is connected with
hydro box, three valves (gas valve, liquid valve, high pressure gas valve) of the
outdoor unit must be open.
4.2.2 Test Operation
4.2.2.1 Precautions
â‘´ Before starting commissioning, make sure that the compressor has been preheated for
more than 8 hours and check whether preheating is normal by touching. Commissioning can be
started only when preheating is normal. Otherwise, compressor may be damaged. Commissioning
must be performed or guided by professional personnel.
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