Gree GRS-1.5/D150ANbA-K, Service Manual

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GREE AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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4 Commissioning and Trial Run
4.1 Precautions for Commissioning
Before commissioning, ensure that the power supply model, possible usage range (pipe distance,
indoor and outdoor high and low voltage difference, and power supply voltage), and installation space
meet user requirements.
After verifying that no exception exists upon commissioning, introduce the operation and maintenance
method to the customer according to the user manual. In addition, deliver the precautions and user
manual to the customer for careful storage.
4.2 Brief Introduction to Commissioning
As engineering design, installation, and system control require high precision, commissioning must be
performed after installation. The unit can be delivered if no exception is detected during commissioning.
4.3 Engineering Commissioning
4.3.1 Air Exhaust for Initial Run
1) After the water tank is fully injected with water, exhaust air in the pipe. (In initial installation, this
operation shall be implemented by the installation and commissioning personnel. During normal
operation, users also need to exhaust air in the pipe before water makeup startup after water in the
water tank is discharged. Operations must be in accordance with the manual or label on the water
tank.)
Inject water fully and check leakage. Turn on the water inlet/outlet cut-off valve of the water tank and
the hot water tap or shower head on the user’s side. If water flows out continuously at the tap or shower
head, the water tank is full of water. Then turn off the tap or shower head. Check whether leakage exist
in the water pipeline, especially at joints. When no leakage is found, power on the unit.
2) Unit power-on: After the unit is powered up, the wired controller buzzes for once. Check whether an
error code is displayed on the wired controller. It is normal if no error code is displayed. As the wired
controller has the memory function for blackout, it may be in the off or standby mode when it is powered
on for the first time. Note: The unit must be powered on by strictly following the air exhaust steps.
3) Unit running: After air is exhausted, check the water pipeline system. Ensure that the tap or shower
head on the user’s side is turned off and other cut-off valves are turned on before starting the unit.
When the wired controller displays the heat up icon, check whether the unit runs properly. Judgment
criteria include that the fan runs properly and the unit runs stably without obvious shake and noise. After
the unit runs properly for at least 30 minutes and no exception is found, it can be delivered to the user.
Attention:
All operations should be performed in accordance with the corresponding product manual.
4.3.2 Precautions for Operation in Winter
(1) Before starting the unit which has not been used for a long period or in quite low temperature in
winter, energize the unit for at least 8 hours.
(2) Do not disconnect the power supply when the outdoor temperature is quite low in winter; otherwise,
the automatic antifreeze protection will fail to work.