Electra DUO 18+18 ST, DUO 24+24 ST, DUO 18+18 RC, DUO 24+24 RC Service Manual

Service Manual

DUO EDC 18+18/24+24

REFRIGERANT

R410A

HEAT PUMP

COOLING ONLY

AUGUST - 2006

DUO Outdoor Models

DUO 18+18

DUO 24+24

A

LIST OF EFFECTIVE PAGES

Revision Y06-01

Service Manual - DUO Series

LIST OF EFFECTIVE PAGES

Note: Changes in the pages are indicated by a “Revision#” in the footer of each effected page

(when none indicates no changes in the relevant page). All pages in the following list represent
effected/ non effected pages divided by chapters.

Dates of issue for original and changed pages are:

Original ....... 0 ........August 2006

Total number of pages in this publication is 31 consisting of the following:

Page
No.

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No. #

Page
No.

Revision
No. #

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No.

Revision
No. #

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4-1 ........................ 0

5-1 - 5-8 ................ 0

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Appendix A .............0

• Zero in this column indicates an original page.

*Due to constant improvements please note that the data on this service manual can be modified
with out notice.
**Photos are not contractual

i

TABLE OF CONTENTS

Revision Y06-01Service Manual - DUO Series

Table of Contents

1. INTRODUCTION ................................................................................................... 1-1

2. PRODUCT DATA SHEET ...................................................................................... 2-1

3. RATING CONDITIONS .......................................................................................... 3-1

4. OUTLINE DIMENSIONS ....................................................................................... 4-1

5. PERFORMANCE DATA AND PRESSURE CURVES .......................................... 5-1

6. CHARACTERISTICS SOUND LEVEL .................................................................. 6-1

7. ELECTRICAL DATA .............................................................................................. 7-1

8. WIRING DIAGRAMS ............................................................................................. 8-1

9. ELECTRICAL CONNECTIONS ............................................................................. 9-1

10. REFRIGERATION DIAGRAMS ............................................................................. 10-1

11. TUBING CONNECTIONS ...................................................................................... 11-1

12. TROUBLESHOOTING .......................................................................................... 12-1

13. EXPLODED VIEWS AND SPARE PARTS LISTS ................................................. 13-1

14. APPENDIX A ......................................................................................................... 14-1

1-1

INTRODUCTION

Revision Y06-01Series Manual - DUO Series

1. INTRODUCTION

1.1 General

The DUO EDC multi split outdoor unit series, comprise the following ST (cooling only)
and RC (heat pump) models:

• Cooling Only EDC 18+18 ST, EDC 24+24 ST

• Heat Pump EDC 18+18 RC, EDC 24+24 RC

1.2 Main Features

• R410A

• Separate and independent Refrigerant Circuits, Allowing Optimal Capacity.

• Non Depended Operating Mode Among Indoor Units, Allowing Cooling and.

Heating Operation Simultaneously.

• A Stand Alone Deicer and Discharge Pressure Protection PCB.

• Outdoor coil with hydrophilic louver fins for RC units.

• Easy installation and service.

1.3 Tubing Connections

Flare type interconnecting tubing to be produced on site.
For further details please refer to APPENDIX A on this manual.

1.4 Inbox Documentation

Each indoor unit is supplied with its own installation and operation manuals, an
additional instillation guide is provided in the DUO EDC outdoor package.

1.5 Matching Table

OUTDOOR UNITS

INDOOR UNITS

MODEL REFRIGERANT WNG 18 WNG 24

DUO 18+18 ST/RC R410A

√

DUO 24+24 ST/RC R410A

√

2-1

PRODUCT DATA SHEET

Revision Y06-01Service Manual - DUO Series

2. PRODUCT DATA SHEET

2.1 DUO 18+18

Model Indoor Unit WNG 18+18
Model Outdoor Unit DUO 18+18 R410A RC
Installation Method of Pipe Flared

Characteristics Units Cooling Heating

Capacity

(4)

Btu/hr 18250*2 18600*2

kW 5.35*2 5.45*2

Power input

(4)

kW 3.32 3.32

EER (Cooling) or COP(Heating)

(4)

W/W 3.22 3.28
Energy efficiency class A C
Power supply V/Ph/Hz 220-240V/Single/50Hz
Rated current A 14.7 14.7
Starting current A 32 / 32
Circuit breaker rating A 30

INDOOR

Fan type & quantity Cross flow*1
Fan speeds H/M/L RPM 1200/1100/1000
Air flow

(1)

H/M/L m3/hr 890/800/700
External static pressure Min-Max Pa N/A
Sound power level

(2)

H/M/L dB(A) 57/54/52
Sound pressure level

(3)

H/M/L dB(A) 44/41/38
Moisture removal l/hr 2
Condenstate drain tube I.D mm 16
Dimensions WxHxD mm 1060x295x210
Weight kg 14
Package dimensions WxHxD mm 1125x360x280
Packaged weight kg 17
Units per pallet units 16
Stacking height units 8

OUTDOOR

Refrigerant control Capillary tube
Compressor type,model Rotary TOSHIBA PA200X2CS-4KU1
Fan type & quantity Propeller(direct) x 2
Fan speeds H/L RPM 780
Air flow H/L m3/hr 4500
Sound power level H/L dB(A) 70
Sound pressure level

(3)

H/L dB(A) 60
Dimensions WxHxD mm 950X1270X340
Weight kg 110
Package dimensions WxHxD mm 1110X1425X480
Packaged weight kg 130
Units per pallet Units 1
Stacking height units 1
Refrigerant type R410A
Refrigerant chargless distance kg/m 1.57kg/7.5m
Additional charge 4≤L≤10:+0g;10<L≤18:+230g;18<L≤25:+430g

Connections between

units

Liquid line In.(mm) 1/4”(6.35)
Suction line In.(mm) 1/2”(12.7)

Max.tubing length m. 25

Max.height difference m. 15

Operation control type Remote control
Heating elements kW
Others

(1)Airflow in ducted units;at nominal external static pressure.
(2)Sound power in ducted units is measured at air discharge.
(3)Sound pressure level measured at 1-meter distance from unit.
(4)Rating conditions in accordance to ISO 5151 and ISO 13253 (for ducted units).

2-2

PRODUCT DATA SHEET

Revision Y06-01 Service Manual - DUO Series

2.2 DUO 24+24

Model Indoor Unit WNG 24+24
Model Outdoor Unit DUO 24+24 R410A RC
Installation Method of Pipe Flared

Characteristics Units Cooling Heating

Capacity

(4)

Btu/hr 22180*2 24230*2

kW 6.55*2 7.10*2

Power input

(4)

kW 4.65 4.81

EER (Cooling) or COP(Heating)

(4)

W/W 2.82 2.95
Energy efficiency class C D
Power supply V/Ph/Hz 220-240V/Single/50Hz
Rated current A 20.3 21.0
Starting current A 63 / 63
Circuit breaker rating A 30

INDOOR

Fan type & quantity Cross flow*1
Fan speeds H/M/L RPM 1300/1200/1100
Air flow

(1)

H/M/L m3/hr 910/820/740
External static pressure Min-Max Pa N/A
Sound power level

(2)

H/M/L dB(A) 60/57/55
Sound pressure level

(3)

H/M/L dB(A) 47/44/42
Moisture removal l/hr 2.8
Condenstate drain tube I.D mm 16
Dimensions WxHxD mm 1060x295x210
Weight kg 16
Package dimensions WxHxD mm 1125x360x280
Packaged weight kg 18
Units per pallet units 16
Stacking height units 8

OUTDOOR

Refrigerant control Capillary tube
Compressor type,model NN27VBAMT
Fan type & quantity Propeller(direct) x 2
Fan speeds H/L RPM 830
Air flow H/L m3/hr 4950
Sound power level H/L dB(A) 72
Sound pressure level

(3)

H/L dB(A) 61
Dimensions WxHxD mm 950X1270X340
Weight kg 110
Package dimensions WxHxD mm 1110X1425X480
Packaged weight kg 130
Units per pallet Units 1
Stacking height units 1
Refrigerant type R410A
Refrigerant chargless distance kg/m 2.15kg/7.5m
Additional charge 4≤L≤10:+0g;10<L≤15:+450g;15<L≤20:+580g

Connections between units

Liquid line In.(mm) 3/8”(9.53)
Suction line In.(mm) 5/8”(15.88)
Max.tubing length m. 20

Max.height difference m. 15

Operation control type Remote control
Heating elements kW
Others

(1)Airflow in ducted units;at nominal external static pressure.
(2)Sound power in ducted units is measured at air discharge.
(3)Sound pressure level measured at 1-meter distance from unit.
(4)Rating conditions in accordance to ISO 5151 and ISO 13253 (for ducted units).

3-1

RATING CONDITIONS

Revision Y06-01Service Manual - DUO Series

3. RATING CONDITIONS

Standard conditions in accordance with ISO 5151, ISO 13253 (for ducted units)
and EN 14511.

Cooling:

Indoor: 27oC DB 19oC WB
Outdoor: 35 oC DB

Heating:
Indoor: 20oC DB
Outdoor: 7oC DB 6oC WB

3.1 Operating Limits

Indoor Outdoor

Cooling

Upper limit 32

o

C DB 23oC WB 46oC DB

Lower limit 21

o

C DB 15oC WB 21oC DB

Heating

Upper limit 27

o

C DB 24oC DB 18oC WB

Lower limit 20oC DB -9oC DB -10oC WB

Voltage

1PH 198 – 264 V
3PH 360 – 440 V

4-1

OUTLINE DIMENSIONS

Revision Y06-01Service Manual - DUO Series

4. OUTLINE DIMENSIONS

4.1 Indoor Unit: WNG 18, 24

4.2 Outdoor Unit: DUO EDC 18+18, 24+24

5-1

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01Service Manual - DUO Series

5. PERFORMANCE DATA

5.1 DUO 18+18 (Unit 1 + Unit 2)

5.1.1 Cooling Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

Entering Air DB

OD Coil(oC)

Data

Entering Air WB/DB ID Coil(

o

C)

15/21 17/24 19/27 21/29 23/32

15

TC 11.28 11.68 11.96 12.24 12.43
SC 7.75 8.08 8.39 8.60 8.76

PI 2.36 2.37 2.37 2.38 2.39

20

TC 10.91 11.50 11.86 12.14 12.41
SC 7.59 8.00 8.34 8.58 8.74

PI 2.56 2.57 2.58 2.59 2.60

25

TC 10.32 11.15 11.72 12.07 12.37
SC 7.40 7.85 8.28 8.52 8.67

PI 2.77 2.79 2.81 2.83 2.85

30

TC 9.66 10.51 11.36 11.76 12.11
SC 7.16 7.62 8.10 8.33 8.49

PI 2.99 3.03 3.06 3.08 3.11

35

TC 8.94 9.70 10.70 11.24 11.77
SC 6.81 7.30 7.91 8.14 8.30

PI 3.22 3.28 3.33 3.36 3.37

40

TC 8.13 8.85 9.66 10.56 11.10
SC 6.42 6.91 7.48 7.72 7.88

PI 3.48 3.53 3.59 3.63 3.67

46

TC 7.05 7.71 8.48 9.37 10.10
SC 5.92 6.34 6.82 7.06 7.22

PI 3.80 3.86 3.94 4.00 4.04

LEGEND

TC – Total Cooling Capacity, kW
SC – Sensible Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor

5-2

PERFORMANCE DATA & PRESSURE CURVES

Revision Y06-01 Service Manual - DUO Series

5.1.2 Heating Mode at 7.5m Tubing Connection.

230V : Indoor Fan at High Speed.

ENTERING AIR DB ID COIL(OC)

15 20 25

ENTERING WB

OD COIL(

o

C)

TH Pl TH Pl TH Pl

-10 5.72 2.66 5.50 2.83 5.29 2.97

-7 6.16 2.72 5.94 2.87 5.72 3.03

-2 6.54 2.76 6.32 2.92 6.10 3.09
2 7.96 2.89 7.63 3.07 7.30 3.25
6 11.23 3.10 10.90 3.32 10.52 3.53

10 12.21 3.28 11.88 3.50 11.55 3.75
15 13.19 3.42 12.86 3.69 12.54 3.92
20 13.90 3.52 13.57 3.82 13.19 4.12

LEGEND

TH – Total Heating Capacity, kW
PI – Power Input, kW
WB – Wet Bulb Temp., (oC)
DB – Dry Bulb Temp., (oC)
ID – Indoor
OD – Outdoor