Gree CN851W1000, Руководство по обслуживанию

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DC Inverter Multi
VRF Service Manual
89
1�2 Key Points of Installation
Installation Procedures Description and Acceptance Criteria
Material Selection and Equipment Inspection
1) The materials specified on the engineering drawing shall be purchased as specified
(e.g. copper tube, thermal insulation tube, PVC pipe, power cables, air switch, etc);
2) The materials not specified on the engineering drawing shall be purchased
according to the actual quantity of works (e.g. hanger frame, cable duct, etc);
3) Check if the outdoor unit, indoor unit, communication wires and accessories are complete.
Installation
of indoor
unit
Communication
wire
Connection
1) The power cables shall be separated from communication wires at a least distance of 10cm.
2) To avoid breaking the communication wires, please do not use strong force;
3) For multiple units, please mark them properly.
4) Switch on indoor and outdoor unit, and ensure there is no
display of “Communication Wire Error E6”.
Address
dial code
1) Each indoor unit under the same system has a unique address dial code.
2) The wired controller and its corresponding indoor unit have the same address dial code.
Remote Control
1) Select the remote control mode;
2) The centralized controller and communication module shall
be installed free from the source of interference.
Power cord
1) The power cable must meet the specifications.
2) The indoor units under the same system must be arranged under unified power supply.
Drainage Pipe
Installation
1) The PVC pipes must meet the specifications.
2) A specific gradient must be provided along the water flow direction.
3) Carry out water detection after installation.
4) Carry out thermal insulation to the drainage pipe only after the water detection is accepted.
Thermal
insulation
1) The thermal insulation tube must meet the specifications.
2) Seal between the thermal insulation pipes to avoid air entry.
Installation of Air Duct
(when with high static
pressure duct-type unit)
1) Design the length of air duct according to static pressure;
2) The air inlet shall be optimally designed to avoid too small size.
Installation
of
connection
pipes
Welding
1) The copper tube must meet the specifications.
2) Ensure it is dry and clean inside the tube.
3) Make sure to charge nitrogen as required for protection when welding the tubes.
4) Please keep to the welding process and ensure the system free of leakage.
5) Add a dual-way filter on liquid pipe side.
6) For multiple systems, please mark them properly.
7) Carry out leakage detection under pressure after welding.
Purge and make leakage
detection under pressure
1) Purge the system clean.
2) Keep the pressure for 24 hours.
3) Except for the influence by temperature, it is deemed acceptable if pressure drop is within
0.02MPa. (With the temperature change by 1 , the pressure will change by approx. 0.01MPa).
Thermal insulation
1) The thermal insulation tube must meet the specifications.
2) Seal between the thermal insulation pipes to avoid air entry.
Installation of outdoor unit
1) Select the installing position correctly.
2) Build the foundation according to the anchor bolt position and the dimension of outdoor unit;
3) Build the damping device properly.
4) Avoid sharp knock when handling the outdoor unit. The
inclination angle shall not be higher than 15°.
Connection of indoor unit and outdoor unit
1) Tighten the nuts;
2) Provide proper protection to the outdoor connection pipe,
communication wires and power supply.
Leakage detection under pressure
1) Keep the pressure for 24 hours. Except for the influence by temperature, it is
deemed acceptable if pressure drop is within 0.02MPa. (With the temperature
change by 1 , the pressure will change by approx. 0.01MPa).
Vacuuming
1) Establish vacuum simultaneously in the gas pipe and liquid pipe;
2) The vacuuming time shall be long enough.
3) Put still for 1 hour after vacuuming. It is deemed acceptable if the pressure will not rise.
Add refrigerant
Add refrigerant according to the volume as specified on the engineering drawing.
Open the valve of outdoor unit
Commissioning of complete unit
Remarks:
1) Described above are general working procedures. The procedures might vary with the site conditions.
2) For detailed installation rules, please see the description in each chapter.