Service manual

36
1�2 Key Points of Installation
Installation Procedures Description and Acceptance Criteria
Material Selection and Equipment Inspection
The materials specied on the engineering drawing shall be purchased as specied (e.g. copper
tube, thermal insulation tube, PVC pipe, power cables, air switch, etc).
The materials not specied on the engineering drawing shall be purchased 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
The power cable must meet the specications.
The indoor units under the same system must be arranged under unied power supply.
Drainage Pipe
Installation
The PVC pipes must meet the specications.
A specic gradient must be provided along the water ow direction.
Carry out water detection after installation.
Carry out thermal insulation to the drainage pipe only after the water detection is accepted.
Thermal
insulation
The thermal insulation tube must meet the specications.
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 air inlet shall be optimally designed to avoid too small size
Installation
of connection
pipes
Welding
The copper tube must meet the specications.
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.
Add a dual-way lter on liquid pipe side
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
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
The thermal insulation tube must meet the specications.
Seal between the thermal insulation pipes to avoid air entry.
Installation of outdoor unit
Select the installing position correctly.
Build the foundation according to the anchor bolt position and the dimension of outdoor unit
Build the damping device properly.
Avoid sharp knock when handling the outdoor unit. The inclination angle shall not be higher
than 15°.
Connection of indoor unit and outdoor unit
Tighten the nuts.
Provide proper protection to the outdoor connection pipe, communication wires and power
supply.
Leakage detection under pressure
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
Establish vacuum simultaneously in the gas pipe and liquid pipe;
The vacuuming time shall be long enough.
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 specied on the engineering drawing.
Open the valve of outdoor unit
Commissioning of complete unit
Remarks:
a. Described above are general working procedures. The procedures might vary with the site conditions.
b. For detailed installation rules, please see the description in each chapter.
34