Airwell DUO OU7-0909 User manual

REFRIGERANT
R410A
HEAT PUMP
COOLING ONLY
TM DUO N A0GB SEPTEMBER - 2005
DUO Outdoor Models
DUO OU7 (9+9)
DUO OU7 (9+12)
Technical Manual
DUO N Series

A
LIST OF EFFECTIVE PAGES
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 ........ 5 March 2005
Total number of pages in this publication is 44 consisting of the following:
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Title....................... 1
A ........................... 1
i............................. 0
1-1 ........................ 1
2-1 - 2-9................ 1
3-1 ........................ 0
4-1 - 4-2................ 1
5-1 - 5-21.............. 2
6-1 ........................ 1
7-1 ........................ 0
8-1 ........................ 0
9-1 ........................ 0
10-1 ...................... 0
11-1....................... 1
12-1 ...................... 1
13-1-13-2.............. 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
Service 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. CONTROL SYSTEM .............................................................................................12-1
13. TROUBLESHOOTING ..........................................................................................13-1
REFRIGERANT R410A
ALPHA 9 ALPHA 12 WNG 9 WNG 12
AME 20 AME 30 NXE 20 NXE 30
WAF 9 WAF 12 FLO 9 FLO 12
INDOOR

1-1
INTRODUCTION
Series Manual - DUO Series
1. INTRODUCTION
1.1 General
The DUO multi split R410A outdoor unit series, comprise the following ST (cooling only)
and RC (heat pump) models:
• Cooling Only OU7 (9+9) ST, OU7 (9+12) ST, OU7 (12+12) ST
• Heat Pump OU7 (9+9) RC, OU7 (9+12) RC, OU7 (12+12) RC
1.2 Main Features
• R410A refrigerant
• Built in Deicing Controller.
• High COP
• Outdoor coil with hydrophilic louver fins for RC units.
• Metal sheets protected by anti - corrosion paint work allowing long life
resistance.
• Compressor mounted in a soundproofed compartment
• 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, and to the relevant
indoor service 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 outdoor package.
1.5 Matching Table
OUTDOOR UNITS
INDOOR UNITS
MODEL REFRIGERANT WNG9 WNG12 ALPHA 9 ALPHA 12
DUO 9+9 ST/RC R410A √√
DUO 9+12 ST/RC R410A √√√√
DUO 12+12 ST/RC R410A √√

2-1
PRODUCT DATA SHEET
Service Manual - DUO Series
2. PRODUCT DATA SHEET
Model Indoor Unit WNG 9+9
Model Outdoor Unit OU7-0909
Installation Method Wall Mounted
Characteristics Units Cooling Heating
Btu/hr 19520 18315
Capacity(1)
kW 5.72 5.37
Power Input(1) kW 1.9 1.79
COP(1) W/W 3.0 3.0
Power Supply V/Ph/Hz 230/1/50+/-10%
Rated Current A 7.7 7.3
Starting Current A 37.4
Circuit Breaker Rating A 16
Fan Type & Quantity Crossflow*1
Airflow(2) H/M/L m3/hr 450 380 330
External Static Pressure Min-Max Pa N/A
Sound Power Level(3) H/M/L dB (A) 44 46 49
Sound Pressure Level (4) H/M/L dB (A) 28 31 35
Moisture Removal L/hr 2*0.9
Condensate Drain Tube I.D. mm 16
Dimensions W/H/D mm 810*190*285
Weight kg 11
Package Dimensions W/H/D mm 945*395*655
Units per Pallet Units 32
INDOOR
Stacking Height Units 8
Refrigerant Control Capillary tube
Compressor Type, Model Rotary
Fan Type & Quantity Axial*1
Fan Speeds H/L RPM 850
Airflow H/L m3/hr 1520 1100
Sound Power Level H/L dB (A) 66.8
Sound Pressure Level (4) H/L dB (A) 59
Dimensions W/H/D mm 900*680*340
Weight kg 72
Package Dimensions W/H/D mm 985*730*406
Packaged Weight kg 74
Units per Pallet Units 6
Stacking Height Units 2
Refrigerant Type R410A
Refrigerant Charge ST/ RC outdoor gr 750+750 / 730+730
Liquid Line In 2*6.35(1/4")
Suction Line In 2*9.53(3/8")
Max. Tubing Length m 15
OUTDOOR
Connections
Between Units
Max. Height Difference m7
Operation Control Type LC D REMOTE CONTROL
Heating Elements kW NO
Others
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

2-2
PRODUCT DATA SHEET
Revision Service Manual - DUO Series
Model Indoor Unit WNG 9+12
Model Outdoor Unit OU7-0912
Installation Method Wall Mounted
Characteristics Units Cooling Heating
Btu/hr 20230 20910
Capacity(1)
kW 5.93 6.13
Power Input(1) kW 2.07 1.97
COP(1) W/W 2.86 3.1
Power Supply V/Ph/Hz 230/1/50
Rated Current A 9 8.7
Starting Current A 43
Circuit Breaker Rating A 16
Fan Type & Quantity Crossflow*1
Airflow(2) H/M/L m3/hr 450+635 380+550 330+450
External Static Pressure Min-Max Pa N/A
Sound Power Level(3) H/M/L dB (A) 44+49 46+53 49+56
Sound Pressure Level (4) H/M/L dB (A) 28+35 31+39 35+43
Moisture Removal L/hr 0.9+1.3
Condensate Drain Tube I.D. mm 16
Dimensions W/H/D mm 810*190*285
Weight kg 11+11.5
Package Dimensions W/H/D mm 945*395*655
Units per Pallet Units 32
INDOOR
Stacking Height Units 8
Refrigerant Control Capillary
Compressor Type, Model Rotary
Fan Type & Quantity Axial*1
Fan Speeds H/L RPM 850
Airflow H/L m3/hr 1520 1100
Sound Power Level H/L dB (A) 66.8
Sound Pressure Level (4) H/L dB (A) 59
Dimensions W/H/D mm 900*680*340
Weight kg 74
Package Dimensions W/H/D mm 985*730*406
Packaged Weight kg 76
Units per Pallet Units 6
Stacking Height Units 2
Refrigerant Type R410A
Refrigerant Charge ST/ RC outdoor gr 830+670 / 830+670
Liquid Line In 2*6.35(1/4")
Suction Line In 2*9.53(3/8")
Max. Tubing Length m 15
OUTDOOR
Connections
Between Units
Max. Height Difference m 7
Operation Control Type LCD REMOTE CONTROL
Heating Elements kW NO
Others
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

2-3
PRODUCT DATA SHEET
Service Manual - DUO Series
Model Indoor Unit Alpha 9+9
Model Outdoor Unit OU7-0909
Installation Method Wall Mounted
Characteristics Units Cooling Heating
Btu/hr 17400 18425
Capacity(1)
kW 5.1 5.4
Power Input(1) kW 1.84 1.86
COP(1) W/W 2.8 2.9
Power Supply V/Ph/Hz 230/1/50
Rated Current A 7.6 7.7
Starting Current A 37.4
Circuit Breaker Rating A 16
Fan Type & Quantity Crossflow*1
Airflow(2) H/M/L m3/hr 450 350
External Static Pressure Min-Max Pa N/A
Sound Power Level(3) H/M/L dB (A) 52 47
Sound Pressure Level (4) H/M/L dB (A) 40 36
Moisture Removal L/hr 2*0.9
Condensate Drain Tube I.D. mm 16
Dimensions W/H/D mm 680*250*180
Weight kg 7
Package Dimensions W/H/D mm 770*325*265
Units per Pallet Units 36
INDOOR
Stacking Height Units 9
Refrigerant Control Capillary tube
Compressor Type, Model Rotary
Fan Type & Quantity Axial*1
Fan Speeds H/L RPM 850
Airflow H/L m3/hr 1520 1100
Sound Power Level H/L dB (A) 66.8
Sound Pressure Level (4) H/L dB (A) 59
Dimensions W/H/D mm 900*680*340
Weight kg 72
Package Dimensions W/H/D mm 985*730*406
Packaged Weight kg 74
Units per Pallet Units 6
Stacking Height Units 2
Refrigerant Type R410A
Refrigerant Charge ST/ RC outdoor gr 750+750 / 730+730
Liquid Line In 2*6.35(1/4")
Suction Line In 2*9.53(3/8")
Max. Tubing Length m 15
OUTDOOR
Connections
Between Units Max. Height Difference m7
Operation Control Type LC D REMOTE CONTROL
Heating Elements kW NO
Others
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

2-4
PRODUCT DATA SHEET
Service Manual - DUO Series
Model Indoor Unit ALPHA 9+12
Model Outdoor Unit OU7-0912
Installation Method Wall Mounted
Characteristics Units Cooling Heating
Btu/hr 19815 21020
Capacity(1)
kW 5.81 6.16
Power Input(1) kW 2.06 2.09
COP(1) W/W 2.82 2.94
Power Supply V/Ph/Hz 230/1/50+/-10%
Rated Current A 9 9.2
Starting Current A 43
Circuit Breaker Rating A 16
Fan Type & Quantity Crossflow *1
Airflow(2) H/M/L m3/hr 600+450 450+350
External Static Pressure Min-Max Pa N/A
Sound Power Level(3) H/M/L dB (A) 54+52 47+47
Sound Pressure Level (4) H/M/L dB (A) 42+40 36+36
Moisture Removal L/hr 0.9+1.3
Condensate Drain Tube I.D. mm 16
Dimensions W/H/D mm 680*250*180/840*250*180
Weight kg 7+8
Package Dimensions W/H/D mm 930*325*265/770*325*265
Units per Pallet Units 36
INDOOR
Stacking Height Units 9
Refrigerant Control Capillary
Compressor Type, Model Rotary
Fan Type & Quantity Axial*1
Fan Speeds H/L RPM 850
Airflow H/L m3/hr 1520 1100
Sound Power Level H/L dB (A) 66.8
Sound Pressure Level (4) H/L dB (A) 59
Dimensions W/H/D mm 900*680*340
Weight kg 74
Package Dimensions W/H/D mm 985*730*406
Packaged Weight kg 76
Units per Pallet Units 6
Stacking Height Units 2
Refrigerant Type R410A
Refrigerant Charge ST/ RC outdoor gr 830+670 / 830+670
Liquid Line In 2*6.35(1/4")
Suction Line In 2*9.53(3/8")
Max. Tubing Length m 15
OUTDOOR
Connections
Between Units
Max. Height Difference m 7
Operation Control Type LCD REMOTE CONTROL
Heating Elements kW NO
Others
1) Rating conditions in accordance with ISO 5151 and ISO 13253 (for ducted units) and EN14511.
(2) Airflow in ducted units; at nominal external static pressure.
(3) Sound power in ducted units is measured at air discharge.
(4) Sound pressure level measured at 1 meter distance from unit.

2-5
PRODUCT DATA SHEET
Service Manual - DUO Series
2.1 Capacity & Additional Charge Table
2.1.1 DUO 9+9 RC Additional Refrigerant Charge Lable (as show on unit).
2.1.2 DUO 9+9 ST Additional Refrigerant Charge Lable (as show on unit).
CAPACITY AND ADDITIONAL CHARGE
FOR VARIOUS APPLICATIONS
UNIT 1 UNIT 2 UNIT 1 UNIT 2
ALPHA 9 ALPHA 9 WNG 9 WNG 9
AME 20 AME 20 NXE 20 NXE 20
INDOOR
COOLING
CAPACITY*17400 Btu/h, 5100W 19520 Btu/h, 5720W
ADDITIONAL
CHARGE (gr)
7.5m-15m
* For two units operating simultaneously.
REFRIGERANT R410A Cat.No.433945/01
I38 
I38 
8>A
8>A

2-6
PRODUCT DATA SHEET
Service Manual - DUO Series
2.1.3 DUO 9+12 RC Additional Refrigerant Charge Lable (as show on unit).
2.1.4 DUO 9+12 ST Additional Refrigerant Charge Lable (as show on unit).
CAPACITYAND ADDITIONAL CHARGE
FOR VARIOUS APPLICATIONS
UNIT 1 UNIT 2 UNIT 1 UNIT 2
ALPHA 12 ALPHA 9 WNG 12 WNG 9
WAF 12 WAF 9 FLO 12 FLO 9
INDOOR
MAE 30 MAE 20 NXE 30 NXE 20
COOLING
CAPACITY*19815 Btu/h, 5810W 20230 Btu/h, 5930W
HEATING
CAPACITY*21020 Btu/h, 6160W 20910 Btu/h, 6130W
Up to 7.5m0 0 50 50
ADDITIONAL CHARGE (gr)
7.5m-15m50 50 100 100
* For two units operatingsimultaneously.
REFRIGERANT
R410A
Cat.No.4
33
/01
944
CAPACITY AND ADDITIONAL CHARGE
FOR VARIOUS APPLICATIONS
UNIT 1 UNIT 2 UNIT 1 UNIT 2
ALPHA 12 ALPHA 9 WNG 12 WNG 9
AME 30 AME 20 NXE 30 NXE 20
INDOOR
COOLING
CAPACITY* 19815 Btu/h, 5810W 20230 Btu/h, 5930W
Up to 7.5m 0 0 90 80
ADDITIONAL CHARGE (gr)
7.5m-15m 100
* For two units operating simultaneously.
REFRIGERANT R410A Cat.No.433946/01
190
100 180