Gree KF-70DW/NA1 Operating manual

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KF(R)-70DW/NA1 Technical Service Manual
Introduction
In this technical service manual, you will find rich references to KF(R)-70DW/NA1
model including photoes, technical specifications, explosive views, spare parts lists and
circuit diagrams. Service people and engineers of Gree' s customers and distributors would
find it a very handy source of technical information of our products.
Technical Support Group
Mar.2004
Contents
Summary
Technical and specifications
Names and spare parts
Outlines and installation dimensions
Working principle diagram
Circuit diagram
PCB function manual
Disassemble procedures
Explosive view and spare parts list
Care and maintenance
Trouble shooting

1
KF-70DW/NA1 1Ph 230V 50Hz
R407C
１．
KFR-70DW/NA1
Summary
Model
Note

２．
3
Model KF-70DW/NA1
Function COOLING
Power Supply (Phase-Frequency-Voltage) 1Ph – 230V – 50Hz
Capacity (W) 7000
Rated Input (W) 3100
Rated Current (A) 15.2
RecyclingAirVolume (m
3/h) 1170
Dehumidifying Volume (L/h) 2.3
C.O.P/EER (W/W) 2.26
Model KF-70D/NA1
Motor Fan Speed (r/min) (H/M/L) 1360/1280/1240
Output Power (w) 100
Fan Type-Piece Centrifugal fan - 4
Diameter-Length (mm) φ125X 134
Evaporator Aluminum fin-copper tube
Pipe Diameter φ7
Row-Fin Gap (mm) 3-1.6
Working Area (m2) 1.042X 0.19
Swing Motor MP35CA
Input Power of Motor (W) 4
Fuse (A) controllor5A transformer0.2A
Working Capacitor (uF) 3
Noise dB (A) ≤48
Dimension (W/D/H)( mm) 1300X188X600
Dimension of Package (W/D/H)( mm) 1414x248x724
Indoor unit
Net Weight /Gross Weight (kg) 32/36
Model KF-70W/dNA1
Input Power (W) 3000
Running Current (A) 14.5
L.R.A. (A) 75
Throttling Method Capillary
Compressor Model C-RN220H5B
Protector Internal overload protection
Starting Method By capacitor
Working Temp Range 2～43℃
Condenser Aluminum-copper
Pipe Diameter Φ9.52
Rows - Fin Gap (mm) 2- 1.8
Working Area (m2) 725X813
Fan Motor Power(W)/Speed (rpm) 60/780
Fan Type-Piece Axial fan –1
Outdoor unit
Fan Diameter (mm) Ф450
Technicalspecifications

4
Defrosting Method Auto defrost
Noise dB (A) 58
Dimension (W/D/H)( mm) 950x412x840
Dimension of Package (W/D/H)( mm) 1100x450x920
Net Weight /Gross Weight (kg) 75/87
Refrigerant Charge (kg) R407C/2.4
Length (m) 5
Liquid Pipe (mm) Φ9.52(3/8”)Outer
Diameter Gas Pipe (mm) Φ16(5/8”)
Height (m) 5
Connecting Pipe
Max
Distance Length (m) 10
Outdoor unit
The data of above are subject to be changed, please refer to the nameplate for reference.

5
Model KFR-70DW/NA1
Function COOLING HEATING
Power Supply (Phase-Frequency-Voltage) 1Ph – 230V – 50Hz
Capacity (W) 7000 8500
Rated Input (W) 3000 3050
Rated Current (A) 14.6 15.1
Recycling Air Volume (m3/h) 1170
Dehumidifying Volume (L/h) 2.3
C.O.P / EER (W/W) 2.3 2.79
Model KFR-70D/NA1
Motor Fan Speed (r/min) (H/M/L) 1360/1280/1240
Output Power (w) 100
Fan Type-Piece Centrifugal fan - 4
Diameter-Length (mm) φ125X 134
Evaporator Aluminum fin-copper tube
Pipe Diameter φ7
Row-Fin Gap (mm) 3-1.6
Working Area (m2) 1.042X 0.19
Swing Motor MP35CA
Input Power of Motor (W) 4
Fuse (A) Controllor5A transformer0.2A
Working Capacitor (uF) 3
Noise dB (A) ≤47
Dimension (W/D/H)( mm) 1300x188x600
Dimension of Package (W/D/H)( mm) 1414x248x724
Indoor unit
Net Weight /Gross Weight (kg) 32/36
Model KFR-70W/dNA1
Input Power (W) 2900 2950
Running Current (A) 14.2 14.7
L.R.A. (A) 75
Throttling Method Capillary
Compressor Model C-RN220H5B
Protector Internal overload protection
Starting Method By capacitor
Working Temp Range 2～43℃
Condenser Aluminum-copper
Pipe Diameter Φ9.52
Rows - Fin Gap (mm) 2- 1.8
Working Area (m2) 725x813
Fan Motor Power(W)/Speed (rpm) 60/780
Fan Type-Piece Axial fan –1
Outdoor unit
Fan Diameter (mm) Ф450

6
Defrosting Method Auto defrost
Noise dB (A) 58
Dimension (W/D/H)( mm) 950x412x840
Dimension of Package (W/D/H)( mm) 1100x450x920
Net Weight /Gross Weight (kg) 75/87
Refrigerant Charge (kg) R407C/2.5
Length (m) 5
Liquid Pipe (mm) Φ9.52(3/8”)Outer
Diameter Gas Pipe (mm) Φ16(5/8”)
Height (m) 5
Connecting Pipe
Max
Distance Length (m) 10
Outdoor unit
The data of above are subject to be changed, please refer to the nameplate for reference.

3.
7
Names of spare parts
Indoor unit
Leftdecorationplate
Airguidelouver LEDboard
Rightdecorationplate
Front grill
Wrappingtape
Connectionpipe
Valve
Airout
Airin
Outdoorunit
Wirelessremotecontrol

４．
１８８
６００
１３００
100cm
30cm
60cm
60cm
150cm
8
４．１
Outlines and installation dimension
Outlines and dimensions of indoor unit
or more
or more
or more ormore
ormore

４．２
：ｍｍ
５００ｍｍ ５００ｍｍ
３００ｍｍ
２０００ｍｍ
1000mm
1000mm 1000mm
950
572
378
412
340
70
65106
８４０
9
Outlines and dimensions of outdoor unit
Unit
Handle Gas pipe Wire hole Liquid pipe Front grill
Morethan Morethan
Morethan
Airoutlet
Floor
More than
More than More than
More than
Obstructions

５．１
５．２
5.
10
Working principle diagram
Cooling system diagram for cooling only type
Cooling system diagram for cooling/heating type
When the power is on, indoor and outdoor units will start to run. The compressor sucks low-pressure refrigerant gas from the evaporator of indoor unit and
then discharges high-temperature, high-pressure refrigerant gas into outdoor condenser. Then air exchanges the heat with outdoor air and becomes refrigerant
liquid. The liquid is throttled by the capillary and changes into low-temperature and low-pressure liquid and then flows into indoor evaporator. Then liquid exchanges
the heat with the required air and changes into low-temperature and low-pressure refrigerant gas. the cycle introduced above goes on and on, and the demanded low
temperature environment is maintained.
When the power is on, indoor and outdoor units will start to run. When the system operates in cool mode, the compressor sucks low-temperature, low-
pressure refrigerant gas from indoor evaporator and then discharges high-temperature, high-pressure refrigerant gas into outdoor heat exchanger. With the
help of axial flow fan, the gas transfers its latent heat into outdoor air and becomes high-pressure refrigerant liquid. The liquid is throttled by the capillary
and changes into low-temperature and low-pressure liquid and then flows into indoor heat exchanger. With the help of centrifugal fan, the liquid evaporates
into low-temperature refrigerant gas and indoor air is cooled down. The refrigerant gas is sucked into the compressor and the cycle introduced above goes
on and on, and the demanded low temperature environment is maintained.
When the system operates in heat mode, 4-way valve changes its way and the refrigerant flows in the reversible cycle as the cool mode. The refrigerant
discharges its latent heat in the indoor heat exchanger, and sucks heat from outdoor heat exchanger and forms the heat pump cycle. This cycle goes on and
on, and the demanded high temperature environment is maintained.
Heating
Cooling Compressor
Gas-liquid separator
Condenser
electromagnetic
4-wayvalve
Axial flow fan
Auxillary capillary
Main capillary Filter
One-way valve
Cross flow fan
Evaporator
Evaporator Cross flow fan Capillary Filter
Axial flow fan
Condenser
Compressor
Gas-liquid separator