MovinCool Climate Pro 18 Service Manual

SERVICE MANUAL

DocID: 00G00095E

CLIMATE PRO 18

Unit Serial Number Range: 0914XXXXH18 to Present

(From September 2014 to Present)

SERIAL NUMBER LOCATION AND IDENTIFICATION

Nameplate Label Position

Nameplate Label

COOLING AMPS. WITH PUMP

COMPR. OUTPUT

REFRIGERANT/TOTAL CHARGE

DESIGN PRESSURE LO/HI

PART NO./WEIGHT

SERIAL NO.

Month

Model

Sequential Number

Year

© 2014 DENSO PRODUCTS AND SERVICES AMERICAS, INC. All rights reserved. This book may not be reproduced or copied, in whole or in part, without the written permission of the publisher. DENSO PRODUCTS AND SERVICES AMERICAS, INC. reserves the right to make changes without prior notice. MovinCool®, Office Pro®, and SpotCool® are registered trademarks of DENSO Corporation.

Table of Contents

Operation Section

1. PRECAUTIONS FOR SAFETY

1.1 Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.2 Definition of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.3 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. CONSTRUCTION

2.1 Exterior Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Exterior Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.3 Internal Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.4 Basic Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.5 Air Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.6 Compressor and Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.7 Drain Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3. SPECIFICATIONS

3.1 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2 Characteristics in Cool Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.3 Characteristics in Heat Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4. REFRIGERATION SYSTEM

4.1 Refrigeration System Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.2 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.3 Outdoor Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.4 Indoor Heat Exchanger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.5 High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.6 Accumulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.7 Electronic Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.8 4-Way Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.9 Drain Pan for Outdoor Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5. ELECTRICAL SYSTEM

5.1 Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.2 Basic Operation of Electrical Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

5.3 Service Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5.4 Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.5 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table of Contents

5.6 Power Cord with LCDI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5.7 Drain Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5.8 Condensate Pump Kit (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.9 Automatic Restart after Power Interruption (Automatic Recovery Feature) . . . . . . . . . . . . . . . . . . . 41

5.10 Compressor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.11 Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6. EXTERNAL DEVICE CONNECTION

6.1 Millivolt Thermostat Connection (Optional Accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.2 24VAC Thermostat Connection (Field Supplied) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.3 Warning Device Connection (Field Supplied) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

6.4 Alarm Device Connection (Field Supplied) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

7. CONTROL PANEL

7.1 Control Panel and LCD Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7.2 Operational Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

7.3 Record Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Table of Contents

Repair Section

8. TROUBLESHOOTING

8.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.2 Self-Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8.3 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.4 Basic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

9. DISASSEMBLY

9.1 Unit Parts Construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

9.2 Removal of Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

9.3 Removal of Electrical Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.4 Removal of Blower Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

9.5 Inspection of Capacitor (for Fan Motor and Compressor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

9.6 Inspection of Drain Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

9.7 Inspection of Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

9.8 Inspection of Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

9.9 Inspection of Transformer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9.10 Inspection of Electronic Expansion Valve Control Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

9.11 Inspection of 4-Way Valve Controller Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

9.12 Inspection of Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

9.13 Inspection of Wiring Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

9.14 Inspection of Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

10. REFRIGERATION SYSTEM REPAIR

10.1 Repair of Refrigeration System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

10.2 Removal of Refrigeration Cycle Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

10.3 Charging the System with R-410A Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

10.4 Refrigerant Charging Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

11. REASSEMBLY

11.1 Removal of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.2 Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.3 Blower Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.4 Wiring Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

11.5 Perform the Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

11.6 Caster Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Operation Section

1. PRECAUTIONS FOR SAFETY

1.1 Foreword

• This manual has been published to service the MovinCool Climate Pro 18. Please use this

service manual only when servicing the Climate Pro 18.

1.2 Definition of Terms

WARNING

CAUTION

NOTE Provides additional information that facilitates installation or unit operation.

Describes precautions that should be observed in order to prevent injury to

the user during installation or unit operation.

Describes precautions that should be observed in order to prevent damage to

the unit or its components, which may occur during installation or unit

operation if sufficient care is not taken.

1.3 General Precautions

WARNING

• All electrical work should only be performed by qualified electrical technician. Repair to

electrical components by non-certified technicians may result in personal injury and/or

damage to the unit. All electrical components replaced must be genuine MovinCool parts,

purchased from an authorized dealer.

• Disconnect power supply from the unit before performing any service.

• Before replacing any refrigeration components, recover the refrigerant using standard

recovery procedures and equipment.

• When handling refrigerant, always wear proper eye protection and do not allow the

refrigerant to come in contact with your skin.

• Do not expose refrigerant to an open flame.

• The power supply for this unit should be a dedicated single outlet circuit with a UL

recognized short-circuit and ground-fault protective breaker to prevent electrical shock

from the unit.

• When brazing any tubing, always wear eye protection, and work only in a well ventilated

area.

• Be careful of any sharp edges when working on unit.

2. CONSTRUCTION

ILL00849-00

Unit: Inch (mm)

19.4 (492)

3.0 (76)

1.4 (35)1.4 (35)

20.8 (527)

27.5 (698)

4.5

(116)

2.2 (55)

DIA. 11.6 (294)

13.2 (336)11.8 (300) 18.5 (469)

21.4 (544)

2.4 (60)43.5 (1105)

3.7 (93)

49.6 (1258)

2.1 Exterior Dimensions

Operation Section

ILL00850-00

Service Panel

Indoor Heat Exchanger

Air Inlet Grill

Outdoor Heat Exchanger

Air Inlet Panel

Outdoor Heat Exchanger

Air Outlet Duct

Power Cord

Caster

Drain Tank Cover

Control Panel

Cool/Hot Air Outlet Grill

Operation Section

2.2 Exterior Components

2.3 Internal Structure

ILL00851-00

Outdoor Fan Motor

Indoor Fan

Outdoor Fan

Compressor

Service Box

Connector for Optional Condensate Pump

Electronic Expansion Valve

Drain Tank

Indoor Fan Motor

Indoor Heat Exchanger

Drain Pan

Outdoor Heat Exchanger

4-Way Valve

Drain Switch

Accumulator

High Pressure Switch

Operation Section

ILL00852-00

Exhaust Hot Air Outlet

Cool Air Outlet

Indoor Air Inlet

Outdoor Air Inlet

Exhaust Cool Air Outlet

Hot Air Outlet

Indoor Air Inlet

Outdoor Air Inlet

Cool Mode

Heat Mode

Operation Section

2.4 Basic Construction

• The Climate Pro 18 is compact in construction because the indoor and the outdoor heat

exchangers are enclosed in one unit. The interior is divided into three sections. The upper front

face is equipped with the indoor heat exchanger, and the lower front face contains the drain tank

and condensate pump (optional accessory). The rear section contains the outdoor heat

exchanger, the compressor and the control box.

2.5 Air Flow

• In Cool Mode, air drawn from the outdoor air inlet passes through the heat rejection coil

(condenser) and discharges hot air through the exhaust hot air outlet. Air take in from the indoor

air inlet passes through the heat absorption coil (evaporator) and discharges the cool air through

the cool air outlet.

• In Heat Mode, the refrigeration in the unit operates in reverse cycle and the heat rejection coil

(condenser) becomes the heat absorption coil (evaporator). Air drawn from the outdoor air inlet

passes through this heat absorption coil and discharges cool air through the exhaust cool air

outlet. Air taken in from the indoor air inlet passes through the heat rejection coil and discharges

hot air through the hot air outlet.

Operation Section

2.6 Compressor and Fans

• The compressor is hermetically sealed. The indoor fan is a centrifugal type and operated by a

3-speed motor to draw air through the indoor air inlet. The outdoor fan is also a centrifugal type

and operated by a 1-speed motor to draw air through the outdoor air inlet.

2.7 Drain Tank

• A 5.0 gal (19 L) drain tank is supplied with the Climate Pro 18. The condensate (water) is

collected into the tank.

The drain switch activates and stops the operation when tank reaches the level of approximately

4.0 gal (15 L).

< NOTE >

Operation Section

3. SPECIFICATIONS

3.1 Technical Specifications

Technical Specifications - Table 1

ITEM SPECIFICATIONS

Electronic Features Operation Digital Programmable

Electrical Characteristics Voltage Requirement 1 Phase, 115 V, 60 Hz

Operating Voltage Range Max. 127 V

Min. 104 V

Starting Current 65 A

Recommended Fuse Size 20 A

FLA 15.6 A

LRA 65 A

Cooling Performance

Rating Condition

(AHAM PAC-1-2009)

Indoor Heat Exchanger:

80 °F

(26.7 °C), 50 %RH

Outdoor Heat Exchanger:

80 °F (26.7 °C), 50 %RH

Heating Performance

Rating Condition

(AHAM RAC-1-2008)

Indoor Heat Exchanger:

70 °F (21.1 °C), 57 %RH

Outdoor Heat Exchanger:

47 °F (8.3 °C), 75 %RH

Compressor Type Hermetic Rotary

Ventilation Equipment for

Outdoor Coil

Total Cooling Capacity*

Sensible Cooling Capacity*

Power Consumption*

Current Consumption*

SD-EER 9.5

Power Factor

Total Heating Capacity 13,700 Btu/h (4,010 W)

Power Consumption 1.61 kW

Current Consumption 14.7 A

COP 2.49

Power Factor

Output 1.16 kW

Type of Outdoor Coil (Heat Exchanger) Plate Fin

Type of Fan Centrifugal Fan

14,600 Btu/h (4,270 W)

9,900 Btu/h (2,900 W)

1.54 kW

14.1 A

95 %

Air Flow 700 CFM (1,190 m3/h)

Max. External Static Pressure 0.23 IWG (57 Pa)

Motor Output 0.135 kW

*1 : With outdoor heat exchanger air outlet duct 10 feet (3.0 m) vertical head lift from the ground to the ceiling.

Technical Specifications - Table 2

ITEM SPECIFICATIONS

Operation Section

Ventilation Equipment for

Indoor Coil

Power Cord NEMA Plug Configuration 5-20

Refrigerant Refrigerant Control Electronic Expansion Valve

Signal Connection Fire Alarm Input 1 (FA-1, FA-2) • No-voltage contact input

Type of Indoor Coil (Heat Exchanger) Plate Fin

Type of Fan Centrifugal Fan

Air Flow High 540 CFM (918 m3/h)

Medium 440 CFM (748 m3/h)

Low 350 CFM (595 m3/h)

Max. External Static Pressure 0.31 IWG (77 Pa)

Motor Output High 0.12 kW

Medium 0.045 kW

Low 0.017 kW

Gage x Length 12 AWG (3-core) x 10 ft (3.0 m)

Type R-410A

Amount 1.94 lb (0.88 kg)

Fire Alarm Input 2 (Al-1, Al-2)

Warning Signal Output (OS-1, OS-2) 2 A at 30 V (DC/AC) max. with resis-

• Contact resistance less than 100

ohm

tive load

External Wall Thermostat Millivolt Type With terminals RC, O/B, G, Y

24VAC Type With terminals C, O/B, G, Y,

24VAC RC/RH

Dimension W x D x H 21 x 27 x 50 in

(533 x 686 x 1,270 mm)

Weight Net 214 lb (97 kg)

Shipping 250 lb (113 kg)

Drain Tank Capacity 5.0 gal (19 L)

Cooling Operating Condition

Range

Heating Operating Condition

Range

Inlet Air Temperature Max. 95 °F (35 °C), 60 %RH

Min. 65 °F (18 °C), 50 %RH

Without Outdoor Heat

Exchanger Duct

With Outdoor Heat

Exchanger Duct

Max. 80 °F (26.7 °C), 50 %RH

Min. 40 °F (4.4 °C), 50 %RH

Max. 80 °F (26.7 °C), 50 %RH

Min. Indoor Heat Exchanger:

40 °F (4.4 °C), 50 %RH

Outdoor Heat Exchanger:

24 °F (-4.4 °C), 50 %RH

< NOTE >

Operation Section

Technical Specifications - Table 3

ITEM SPECIFICATIONS

Maximum Equivalent Duct

Length

Sound Level*

Safety Devices Compressor Overload Protector Included

Indoor Heat Exchanger Duct 25 ft (7.6 m)

Outdoor Heat Exchanger Duct 100 ft (30.5 m)

With Outdoor Heat

Exchanger Duct

Without Outdoor Heat

Exchanger Duct

Fan Motor Overload Protector (Indoor/Outdoor) Included

Freeze Protection Thermistor Included

Drain Switch Included

Automatic Restart (Power Interruption) Included

Compressor Time Delay Included

High Pressure Interruption Included

Signal Input/Output Included

Current Fuse for Relay Board Included

High 61 dB (A)

Medium 60 dB (A)

Low 59 dB (A)

High 62 dB (A)

Medium 61 dB (A)

Low 60 dB (A)

Current Fuse for Drain Pan Heater and 4-Way

Val ve

Cutoff Fuse for Drain Pan Heater Included

Control Devices Defrost Heating Included

Drain Pan Heater Heating Included

Delay Timer for Indoor

Fan

Temperature Control Included

Programmable Timer Included

3-Speed Fan Included

Loss of Cooling or Heating Included

On-Screen Self-Diagnostic Codes Included

Cooling Not included

Heating Included

Included

• Specifications are subject to change without notice.

*2 : Measured at 3 feet (1.0 m) from surface of the unit.

3.2 Characteristics in Cool Mode

ILL00853-00

Cooling Capacity (kBtu/h)Relative Humidity (%)

Wet Bulb Temp. ºF (ºC)

100

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Dry Bulb Temp. ºF (ºC)

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Mid

• All characteristic values are within ±10% tolerance.

(1) Cooling capacity curve

Operation Section

ILL00854-00

Cooling Capacity (kBtu/h)

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Example: Dry bulb: 80 ºF (27 ºC), 50 %RH, High fan speed



Cooling capacity:14.6 kBtu/h

Relative Humidity (%)

Wet Bulb Temp. ºF (ºC)

100

Dry Bulb Temp. ºF (ºC)

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Mid

Operation Section

How to read the cooling capacity curve

(2) Power consumption curve

Power Consumption (W)Relative Humidity (%)

Wet Bulb Temp. ºF (ºC)

1.1

100

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Dry Bulb Temp. ºF (ºC)

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

Hi Mid Lo

ILL00855-00

Power Consumption (W)Relative Humidity (%)

Wet Bulb Temp. ºF (ºC)

1.1

40 50 60

100

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Dry Bulb Temp. ºF (ºC)

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

Example: Dry bulb: 80 ºF (27 ºC), 50 %RH, High fan speed



Power consumption : 1.54 kW

Hi Mid Lo

ILL00856-00

Operation Section

How to read the power consumption curve

ILL00857-00

Current Consumption (A)Relative Humidity (%)

Wet Bulb Temp. ºF (ºC)

100

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Dry Bulb Temp. ºF (ºC)

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Mid

Current Consumption (A)Relative Humidity (%)

Wet Bulb Temp. ºF (ºC)

40 50 60

100

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Dry Bulb Temp. ºF (ºC)

(10)55 (13) 60(16)

(18)

(21)

(24)

(27)

(29)

(32)

(35)

Example: Dry bulb: 80 ºF (27 ºC), 50 %RH, High fan speed  Current consumption : 14.2 A

Mid

ILL00858-00

Operation Section

(3) Current consumption curve

How to read the current consumption curve

(4) Cool air temperature difference curve

ILL00859-00

Relative Humidity (%)

15 (8.3)

20 (11.1)

25 (13.9)

30 (16.7)

30 40 50 60 70 80

10 (5.6)

Delta-T ºF(ºC)

Mid

Operation Section

ILL00881-00

35 (2)

40 (4)

45 (7)50(10) 55 (13) 60 (16) 65(18)70(21) 75(24) 80(27)85(29)

Heating capacity (kBtu/h)

Dry Bulb Temp. ºF (ºC)

Mid

Operation Section

3.3 Characteristics in Heat Mode

• All characteristic values are within ±10% tolerance.

(1) Heating capacity curve

How to read the heating capacity curve

ILL00882-00

35 (2)

40 (4)

45 (7)50(10) 55 (13) 60 (16) 65(18)70(21) 75(24) 80(27)85(29)

Heating capacity (kBtu/h)

Dry Bulb Temp. ºF (ºC)

Example: Dry bulb: 60 ºF (15.6 ºC), 50 %RH, High fan speed



Heating capacity:16 kBtu/h

Mid

Operation Section

ILL00883-00

35 (2)40(4)45(7)50(10) 55 (13) 60 (16) 65(18)70(21) 75(24) 80(27)85(29)

Power Consumption (kW)

Dry Bulb Temp. ºF (ºC)

1.1

1.2

1.4

1.3

1.5

1.6

1.9

1.8

1.7

Mid

Example: Dry bulb: 60 ºF (15.6 ºC), 50 %RH, High fan speed  Power consumption: 1.54 kW

35 (2)40(4)45(7)50(10) 55 (13) 60 (16) 65(18)70(21) 75(24) 80(27)85(29)

Power Consumption (kW)

Dry Bulb Temp. ºF (ºC)

1.1

1.2

1.4

1.3

1.5

1.6

1.9

1.8

1.7

Mid

ILL00884-00

Operation Section

(2) Power consumption curve

How to read the power consumption curve

(3) Current consumption curve

ILL00885-00

35 (2)40(4)45(7)50(10) 55 (13) 60 (16) 65(18)70(21) 75(24) 80(27)85(29)

Current Consumption (A)

Dry Bulb Temp. ºF (ºC)

Mid

Example: Dry bulb: 60 ºF (15.6 ºC), 50 %RH, High fan speed  Current consumption: 14 A

35 (2)40(4)45(7)50(10) 55 (13) 60 (16) 65(18)70(21) 75(24) 80(27)85(29)

Current Consumption (A)

Dry Bulb Temp. ºF (ºC)

Mid

ILL00886-00

Operation Section

How to read the current consumption curve

ILL00887-00

35 (2)40(4)45(7)50(10) 55 (13) 60 (16) 65(18)70(21) 75(24) 80(27)85(29)

Delta-T ºF (ºC)

Dry Bulb Temp. ºF (ºC)

15(8.3)

20 (11.1)

30 (16.7)

25 (13.9)

35 (19.4)

40 (22.2)

50 (27.8)

45 (25)

Mid

Operation Section

(4) Hot air temperature difference curve

Operation Section

ILL00860-00

High Pressure Switch

Indoor Heat Exchanger

Accumulator

Electronic Expansion Valve

Electronic Expansion Valve Controller

Outdoor Heat Exchanger

4-Way Valve Controller

Compressor

4-Way Valve

4. REFRIGERATION SYSTEM

4.1 Refrigeration System Construction

The component parts of the refrigeration system include the following:

• Compressor, Accumulator, Indoor and Outdoor heat exchangers, High pressure switch,

Electronic expansion valve with controller, 4-Way valve with controller

These parts are all connected by copper tubing. All the connections have been brazed.

ILL00889-00

MF1 (Indoor Fan Motor)

Outdoor Heat Exchanger

MF2 (Outdoor Fan Motor)

EXV (Electronic Expansion Valve)

Compressor

HPRS

(High Pressure Switch)

CTS1 (Indoor Pipe Thermistor)

ODS (Outdoor Air Inlet Thermistor)

Indoor Heat Exchanger

Air InAir In

EMV

Accumulator

OLC (Compressor Overload Relay)

CTS2 (Compressor Pipe Thermistor)

4-Way Valve

RTS (Indoor Air Inlet Thermistor)

CTS3 (Outdoor Pipe Thermistor)

Flow of Refrigerant:

Cool Mode

Heat Mode

Operation Section

ILL00861-00

Discharge Gas (High Pressure)

Accumulator

Strainer

Suction Gas (Low Pressure)

Blade

Discharge Valve

Oil

Lubricator

Roller

Cylinder

Rotor

Stator

Terminal

4.2 Compressor

• The compressor used for the unit is hermetically sealed. The compressor and the compressor

motor are in one casing.

(1) Compressor construction

•The construction of a rotary type compressor is divided into two mechanisms; the drive

mechanism (compressor motor), and the compression mechanism (compressor). When the

rotor shaft of the motor (drive mechanism) turns, the roller (compression mechanism) rotates to

compress the refrigerant.

I000510

Discharge

Hole

Cylinder

Blade

Spring

Suction Hole

Discharge

Val ve

Shaft

Roller

Operation Section

(2) Basic compressor operation

•The roller (compression mechanism) is set

eccentrically with a certain distance given from

the axis of the center of the cylinder. A spring

loaded blade is mounted on the cylinder. The

roller turns to compress the refrigerant in the

space between the cylinder and eccentrically

mounted roller. The blade is in contact with the

roller by means of spring force. The blade

partitions the space between the suction side

and the discharge side to keep compressed refrigerant from returning to the suction side. There

is no suction valve. The discharge valve is designed not to open until the pressure of the

refrigerant within the cylinder reaches or exceeds discharge side pressure. As a result, the

discharge valve prevents the backward flow of refrigerant gas.

(3) Operation

I001676

Blade

Discharge

Val ve

Roller

I001677

Blade

Discharge

Val ve

Roller

I001678

Blade

Discharge

Val ve

Roller

I001679

Blade

Discharge

Val ve

Roller

Operation Section

1) Start of compression

1) The cylinder is filled with low pressure gas.

2) Since pressure in the discharge chamber is

higher than in the cylinder, the discharge

valve is kept closed.

2) Suction and compression

1) The pressure in the cylinder increases

gradually.

2) Refrigerant suction begins on the suction

side of the cylinder.

3) The discharge valve remains closed.

3) Discharge

1) The pressure in the cylinder exceeds that in

the discharge chamber, and the discharge

valve opens.

2) On the suction side, refrigerant suction

continues.

4) Completion of compression

1) When compression is completed, all of the

refrigerant has been drawn from the suction

chamber.

2) Operation then returns to step 1) (Start of

compression) and the above process of

suction and compression continues

repeatedly in succession.

I001680

Oil Feed Groove

Oil Hole

Oil Scrapper

Roller

Rotor

Cylinder

Hollow Shaft

Eccentric Shaft

Operation Section

(4) Compressor lubrication

•The lubrication system is comprised of a hollow

shaft, an oil scraper mounted at the end face,

hollow shaft, a shaft journal (shaft bearing),

and the lubrication groove for the shaft journal.

The lubrication groove is wider than the oil

hole. When the shaft turns, oil is scraped

upward by the oil scraper along the inside

diameter of the hollow shaft. The oil is fed

through the oil hole by centrifugal force, then

supplied to the lubrication groove for each

shaft journal, lubricating the bearing. In this

lubrication system, oil enters into each bearing

separately and returns to the oil reservoir. This

system effectively prevents bearing

temperature increases, and offers high

reliability. In addition, the specially treated

shaft journal keeps the bearing from being damaged during high temperature operation.

4.3 Outdoor Heat Exchanger

• The outdoor heat exchanger coil uses copper tubes that are covered with the thin aluminum

protections called plate fins. In cool mode, heat is given off and absorbed by air being pulled

across these fins by the centrifugal fan, and then expelled through the exhaust hot air outlet. In

heat mode, this heat exchanger coil becomes heat absorption coil, and then cool air is expelled

through the exhaust cool air outlet.

4.4 Indoor Heat Exchanger

• The indoor heat exchanger coil is covered with plate fins. In cool mode, heat is removed from

the air being pulled across the indoor heat exchanger by the centrifugal fan and the resulting

cool air is expelled through the cool air outlet grill. In heat mode, this heat exchanger becomes

heat rejection coil, and then hot air is expelled through the hot air outlet grill.

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