Gree GKH12K3BI, Service Manual

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75
U-MATCH Air
Conditioners
Service Manual
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Model
External Diameter
Maximum Length
of Connection
Pipe
Maximum Difference
in Height between
Outdoor and Indoor
Unit
Additional Charge
of Refrigerant
Gas Pipe /LTXLG3LSH (m) (m) (g/m)
*8+11.$2 ĭ 3/8" ĭ 1/4" 15 15
*8+11.$2
ĭ 1/2" ĭ 1/4" 15 15
*8+11.$2
*8+11.$2
ĭ 5/8" ĭ 3/8" 15
*8+11.$2
*8+11.$2
ĭ 3/4" ĭ 1/2"
GUHN36NM3AO
GUHN42NM3AO
GUHN48NM3A1O
*8+110$2
*8+110$2
GUCN42NM3AO
ĭ 3/4" ĭ
ij
25
GUCN48NM3AO
(/(&75,&:,5,1*:25.
4.1 Wiring Principle
4.1.1 General
‹
Perform wiring of the power supply in conformance with the regulations of the local electric company.
‹
For the control wires connecting indoor units, and between indoor and outdoor units, use of double-core
shield wires is recommended to prevent noise trouble.
‹ Be sure to set the earth leakage breaker and the switches to the power supply section of the indoor unit.
‹ Supply power to each outdoor unit and provide an earth leakage breaker or hand switch for each outdoor
unit.
‹ Store wiring system for control and refrigerant piping system in the same line.
‹ Arrange the cables so that the electric wires do not come to contact with high-temperature part of the
refrigerant pipe; otherwise coating melts and an accident may be caused.
‹
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‹ Installation should be conducted by National Wiring Regulation.
‹
The rated voltage and exclusive power supply must be adopted for the air conditioners.
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And do not drag the power cable forcibly.
‹ The wire diameter of power cable should be large enough, if power cable and connection wire be
damaged, it should be replaced by the exclusive cable.
‹ All electric installation must be done by professional personnel according to local law, regulation and this
manual.
‹ It should be reliably earthed, and it should be connected to the special earth device, the installation work
should be operated by the professional.
‹ The creepage protect switch and air switch must be installed.
‹ Air switch should have the thermal dropout and magnetic dropout function, in order to avoid the short
circuit and overload.
‹
The on spot connection should refer to the circuit diagram, which is stuck on the unit body.
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‹ Air conditioner is the “I” class electric appliance, thus please do conduct reliable grounding measure.
‹ The yellow-green two-color wiring of air conditioner is grounding wire and cannot be used for other
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‹ The user must offer the reliable grounding terminal. Please don’t connect the grounding wire to the
following places:
a. Water pipe;