Gree Hydro Box NRQR30L/A-T - Test Run

Hydro Box
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4.7.2.2 2Way Valve Wiring
It needs one and more 2way valves while installing hydro box. The usage of the 2way valve is
shown as the following table.
Name
Usage
Vavle C
Control the waterway
on/off for domestic hot
water
Vavle D
Control the waterway
on/off for floor heating
The wiring of 2-wire or 3-wire 2way valve refers to the wiring diagram posted inside the cover
of the electrical box.
4.8 Test Run
4.8.1 Preparations for Test Run
(1) Check if the unit is installed correctly.
(2) Check if water system pipes and electric system wires are reasonable.
(3) Check if the circulating water pipe is thermally insulated.
(4) Check if the earthed wires are connected.
(5) Check if the supply voltage complies with the rated voltage of unit.
(6) Check if the check valve and relief valve at the water inlet are installed correctly.
(7) Check if the air in the water system pipes are thoroughly discharged, and if the vent valve
and sewage valve are closed.
(8) The pressure of inlet water shall be not less than 0.15MPa.
4.8.2 Water Pipeline Debugging (leakage detection, air discharge)
4.8.2.1 Leakage Detection
After connecting all waterway pipeline, please arrange leakage detection firstly and then
arrange insulation to waterway system after making sure there is no water leakage. Please pay
special attention to the thermal insulation at the joints of valves and pipe joints. The insulation
cotton with thickness not less than 15mm is recommended.
4.8.2.2 Filling Water for Exhausting Air between Hydro Box with Water Tank and Floor Heating
Pipe
(1) Ensure that each water pipe is correctly connected, the exhaust valve on the user side is
closed and the sewage port is sealed;
(2) Open the water filling valve to fill water. Open the exhaust valve;
(3) When there is water flown out from the exhaust valve, please open the manual exhaust
valve;
(4) When it is completely water flowing out of the vent valve, energize the hydro box and
enter cleaning mode to start exhausting. The operation method is that when the hydro
box is off, pressing “Menu/OK” button to enter menu interface. Press “Up” or “Down” to
find “Function” option, then press “Menu/OK” button to enter “Function Setting”. Select
“Clean” and pressing “Menu/OK” button to start cleaning.