Gree GMV-PD100W/NAB-K, Service Manual

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DC Inverter Multi
VRF Service Manual
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To ensure correct drainage of water, the drainage hose shall be installed according to the installation
instructions. Also the heat insulation shall be provided to avoid condensing.Improper installation of the pipe
might result in water leakage and lead to possible wetting of the articles in the room.
1.2 Key Points of Installation
Installation Procedures Description and Acceptance Criteria
Material Selection and Equipment Inspection
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tube, PVC pipe, power cables, air switch, etc);
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according to the actual quantity of works (e.g. hanger frame, cable duct, etc);
Check if the outdoor unit, indoor unit, communication
wires and accessories are complete.
Installation of
indoor unit
Communication
wire
Connection
The power cables shall be separated from communication
wires at a least distance of 10cm.
To avoid breaking the communication wires, please do not use strong force.
For multiple units, please mark them properly.
Switch on indoor and outdoor unit, and ensure there is
no display of “Communication Wire Error E6”
Address
dial code
Each indoor unit under the same system has a unique address dial code.
The wired controller and its corresponding indoor
unit have the same address dial code.
Remote Control
Select the remote control mode;
The centralized controller and communication module shall
be installed free from the source of interference.
Power cord
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The indoor units under the same system must be
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Drainage hose
Installation
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Carry out water detection after installation.
Carry out thermal insulation to the drainage hose only
after the water detection is accepted.
Thermal
insulation
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Seal between the thermal insulation pipes to avoid air entry.
Installation of Air Duct
(when with high static
pressure duct-type unit)
Design the length of air duct according to static pressure;
The return air inlet shall be optimally designed to avoid too small size.
Installation of
connection
pipes
Welding
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Ensure it is dry and clean inside the tube.
Make sure to charge nitrogen as required for protection when welding the tubes.
Please keep to the welding process and ensure the system free of leakage.
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For multiple systems, please mark them properly.
Carry out leakage detection under pressure after welding.
Purge and make leakage
detection under pressure
Purge the system clean.
Keep the pressure for 24 hours
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if pressure drop is within 0.02MPa. (With the temperature change
by 1?, the pressure will change by approx. 0.01MPa).
Thermal insulation
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Seal between the thermal insulation pipes to avoid air entry.