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

KF-70DW/NA1 1Ph 230V 50Hz

R407C

１．

KFR-70DW/NA1

Summary

Model

Note

２．

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

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.

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

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.

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

150cm

４．１

Outlines and installation dimension

Outlines and dimensions of indoor unit

or more

or more ormore

ormore

４．２

：ｍｍ

５００ｍｍ５００ｍｍ

３００ｍｍ

２０００ｍｍ

1000mm

1000mm 1000mm

950

572

378

412

340

65106

８４０

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

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

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