36
Installation and Maintenance
Service Manual
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
.
Drainage Pipe
Installation
Carry out water detection after installation.
Carry out thermal insulation to the drainage pipe only after the water detection is
accepted.
Thermal
insulation
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
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.
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
within 0.02MPa. (With the temperature change by 1
ć
, the pressure will change by
approx. 0.01MPa)
Thermal insulation
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
acceptable if pressure drop is within 0.02MPa. (With the temperature change by 1
ć
,
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
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.
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