DC INVERTER MULTI VRF INSTALLATION
95
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.
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.
Switch on indoor and outdoor unit, and ensure there is no
display of “Communication Wire Error E6”
Communication
wire
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.
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.
Carry out thermal insulation to the drainage hose only
after the water detection is accepted.
Drainage hose
Thermal
insulation
1. The thermal insulation tube must meet the specifications.
2. Seal between the thermal insulation pipes to avoid air
entry.
Installation
of indoor unit
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 return 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
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