Electra WMZ Series User manual

Service Manual
WMZ Series
REFRIGERANT
R407C
R22
COOLING ONLY
HEAT PUMP
DECEMBER 2004
Indoor Units Outdoor Units
WMZ 7 GCZ 7
WMZ 9 GCZ 9
WMZ 12 GCZ 12
WMZ 17 GCZ 14
WMZ 22 GCZ 24

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LIST OF EFFECTIVE PAGES
Revision Y05-01 Service Manual - WMZ
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 ........ 15 December 2004
Total number of pages in this publication is 151 consisting of the following:
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15-1 – 15-5 ........... 0
Appendix -A...........0
• Zero in this column indicates an original page.

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TABLE OF CONTENTS
Revision Y05-01Service Manual - WMZ
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 & PRESSURE CURVES ................................................5-1
6. SOUND LEVEL CHARACTERISTICS ..................................................................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
14. EXPLODED VIEWS AND SPARE PARTS LISTS.................................................14-1
15. OPTIONAL ACCESSORIES .................................................................................15-1
16. APPENDIX A

1-1
INTRODUCTION
Revision Y05-01Service Manual - WMZ
1. INTRODUCTION
1.1 General
The new WMZ split wall mounted range comprise the ST (cooling only)
and RC (heat pump) models, as follows:
• Cooling Only WMZ 7ST, WMZ 9ST, WMZ 12ST, WMZ 17ST,
WMZ 22ST
• Heat Pump WMZ 7RC, WMZ 9RC, WMZ 12RC, WMZ 17RC,
WMZ 22RC
The indoor WMZ units are available as LED display types only, featuring esthetic
design, compact dimensions, and low noise operation.
1.2 Main Features
• R22 and R407C models
• Microprocessor control.
• Infrared remote control with liquid crystal display.
• Cross flow fan, allowing low noise level operation.
• Indoor coil with treated aluminum fins and coating for improved efficiency.
• Easy access to the interconnecting tubing and wiring connections, so that
removing the front grill or casing is not necessary.
• Refrigerant pipes can be connected to the indoor unit from 6 different optional
directions.
• Automatic treated air sweep.
• Low indoor and outdoor noise levels.
• Easy installation and service.

1-2
INTRODUCTION
Revision Y05-01 Service Manual - WMZ
1.3 Indoor Unit
The indoor unit is wall mounted, and can be easily fitted to many types of residential
and commercials applications.
It includes:
• Casing with air inlet and outlet grills.
• tangential fan.
• Coil with treated aluminum fins.
• Motorized flaps
• Multi-speed motor with internal protection
• Advanced electronic control box assembly
• Interconnecting wiring terminal block
• Mounting plate
1.4 Filtration
The WMZ series presents several types of air filters:
• Easily accessible, and re-usable pre-filters (mesh)
• Pre-charged electrostatic filter (disposable) – optional
• Active carbon filter (disposable) – optional
1.5 Control
The microprocessor indoor controller, and an infrared remote control, supplied as
standard, provides complete operating function and programming. For further details
please refer to the Operation Manual, Appendix A.
1.6 Outdoor Unit
The WMZ outdoor units can be installed as floor or wall mounted units by using a
wall supporting bracket. The metal sheets are protected by anti- corrosion paint work
allowing long life resistance. All outdoor units are pre-charged. For further information
please refer to the Product Data Sheet, Chapter 2.
It includes :
• A Rotary Compressor mounted in a soundproofed compartment :
• Axial fan.
• Outdoor coil with hydrophilic louver fins for RC units.
• Outlet air fan grill.
• Service valves” flare” type connection.
• Interconnecting wiring terminal block.