Electra WMZ 7 User manual

Service Manual
WMZ Series
REFRIGERANT
R407C
R22
COOLING ONLY
HEAT PUMP
SEPTEMBER 2005
Indoor Units Outdoor Units
WMZ 7 GCZ 7
WMZ 9 GCZ 9
WMZ 12 GCZ 12
WMZ 17 GCZ 17
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:
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Page
No.
Revision
No. #
Title....................... 0
A ........................... 0
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2-1 - 2-10.............. 0
3-1 - 3-2................ 0
4-1 - 4-3................ 0
5-1 - 5-98.............. 1
6-1 - 6-2................ 0
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10-1-10-4.............. 0
11-1-11-2............... 0
12-1-12-32............ 0
13-1-13-2.............. 0
14-1 – 14-41 ......... 0
15-1 – 15-5 ........... 0
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.

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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.

1-3
INTRODUCTION
Revision Y05-01Service Manual - WMZ
1.7 Tubing Connections
Flare type interconnecting tubing to be produced on site.
For further details please refer to the Installation Manual, Appendix A.
1.8 Accessories
ASK (All Season Kit):
For low ambient working conditions in cooling, an ASK can be installed inside the
outdoor unit. This kit allows cooling operation down to outdoor temp of -10 ºC by
gradually controlling the outdoor fan speed motor.
RCW Wall Mounted Remote Control
The RCW remote control is mounted on the wall, and controls the unit either as an
infrared remote control or as a wired controller. The wired controller can control up to
10 Indoor units with the same program settings and adjustments.
For further details please refer to Optional Accessories, Chapter 15.
1.9 Inbox Documentation
Each unit is supplied with its own installation and operation manuals.
1.10 Matching Table
1.10.1 R407C / R22
OUTDOOR UNITS
INDOOR UNITS
MODEL REF’ WMZ 7 WMZ 9 WMZ 12 WMZ 17 WMZ 22
GCZ 7 ST/ RC R407C/R22 √
GCZ 9 ST/ RC R407C/R22 √
GCZ 12 ST/ RC R407C/R22 √
GCZ 17 ST / RC R407C/R22 √
GCZ 22 ST / RC R407C/R22 √

2-1
PRODUCT DATA SHEET
Revision Y05-01Service Manual - WMZ
1. PRODUCT DATA SHEET
1.1 R407C
Model Indoor Unit WMZ-7
Model Outdoor Unit GCZ-7
Installation Method of Pipe Flared
Characteristics Units Cooling Only Cooling Heating
Capacity (1) Btu/hr 6860 6860 7640
kW 2.01 2.01 2.24
Power input (1) kW 0.77 0.77 0.72
EER (Cooling) or COP(Heating) (1) W/W 2.61 2.61 3.11
Energy efficiency class DDD
Power supply V/Ph/Hz 230V/Single/50Hz
Rated current A 3.4 3.4 3.2
Starting current A 22
Circuit breaker rating A 10
INDOOR
Fan type & quantity Cross flow x 1
Fan speeds H/M/L RPM 970/750
Air flow(2) H/M/L m3/hr 360/275
External static pressure Min-Max Pa 0
Sound power level (3) H/M/L dB(A) 47/41
Sound pressure level(4) H/M/L dB(A) 34/28
Moisture removal l/hr 0.8
Condensate drain tube I.D mm 16
Dimensions WxHxD mm 815*280*170
Weight kg 8
Package dimensions WxHxD mm 890*240*340
Packaged weight kg 11.5
Units per pallet units 32
Stacking height units 8 levels
OUTDOOR
Refrigerant control Capillary tube
Compressor type, model Rotary, TOSHIBA PG135X1C-4DT2
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 555
Air flow H/L m3/hr 1310
Sound power level H/L dB(A) 63
Sound pressure level(4) H/L dB(A) 53
Dimensions WxHxD mm 760*545*245
Weight kg 30 31
Package dimensions WxHxD mm 880*610*310
Packaged weight kg 32.5
Units per pallet Units 12
Stacking height units 3 levels
Refrigerant type R407C
Refrigerant chargless distance kg/m 0.59kg/4m
Additional charge per 1 meter g/m 4m<Lin<8m:+5g/m Lin>8m:+9g/m
Connections between
units
Liquid line In.(mm) Ф 1/4”(6.35)
Suction line In.(mm) Ф 3/8”(9.53)
Max.tubing length m. Max.10
Max.height
difference m. Max.7
Operation control type Remote control
Heating elements kW
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 Y05-01 Service Manual - WMZ
Model Indoor Unit WMZ-9
Model Outdoor Unit GCZ-9
Installation Method of Pipe Flared
Characteristics Units Cooling Only Cooling Heating
Capacity (1) Btu/hr 8700 8700 9380
kW 2.55 2.55 2.75
Power input (1) kW 1.05 1.05 1.02
EER (Cooling) or COP(Heating) (1) W/W 2.43 2.43 2.7
Energy efficiency class EEE
Power supply V/Ph/Hz 230V/Single/50Hz
Rated current A 4.6 4.6 4.6
Starting current A 26
Circuit breaker rating A 10
INDOOR
Fan type & quantity Cross flow x 1
Fan speeds H/M/L RPM 1070/860
Air flow (2) H/M/L m3/hr 390/310
External static pressure Min-Max Pa 0
Sound power level (3) H/M/L dB(A) 50/45
Sound pressure level(4) H/M/L dB(A) 38/33
Moisture removal l/hr 1
Condensate drain tube I.D mm 16
Dimensions WxHxD mm 815*280*170
Weight kg 8
Package dimensions WxHxD mm 890*240*340
Packaged weight kg 11.5
Units per pallet units 32
Stacking height units 8 levels
OUTDOOR
Refrigerant control Capillary tube
Compressor type, model Rotary, TOSHIBA PG170X1C-4FS2
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 655
Air flow H/L m3/hr 1370
Sound power level H/L dB(A) 66
Sound pressure level(4) H/L dB(A) 56
Dimensions WxHxD mm 760*545*245
Weight kg 31 32
Package dimensions WxHxD mm 880*610*310
Packaged weight kg 33.5
Units per pallet Units 12
Stacking height units 3 levels
Refrigerant type R407C
Refrigerant chargless distance kg/m 0.83kg/4m
Additional charge per 1 meter g/m 4m<Lin<8m:+5g/m Lin>8m:+9g/m
Connections between
units
Liquid line In.(mm) Ф 1/4”(6.35)
Suction line In.(mm) Ф 3/8”(9.53)
Max.tubing length m. Max.10
Max.height
difference m. Max.7
Operation control type Remote control
Heating elements kW
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
Revision Y05-01Service Manual - WMZ
Model Indoor Unit WMZ-12
Model Outdoor Unit GCZ-12
Installation Method of Pipe Flared
Characteristics Units Cooling Only Cooling Heating
Capacity(1) Btu/hr 10610 10610 11430
kW 3.11 3.11 3.35
Power input (1) kW 1.25 1.25 1.28
EER (Cooling) or COP(Heating) (1) W/W 2.49 2.49 2.62
Energy efficiency class EEE
Power supply V/Ph/Hz 230V/Single/50Hz
Rated current A 5.5 5.5 5.9
Starting current A 33
Circuit breaker rating A 15
INDOOR
Fan type & quantity Cross flow x 1
Fan speeds H/M/L RPM 1270/1000
Air flow(2) H/M/L m3/hr 450/385
External static pressure Min-Max Pa 0
Sound power level (3) H/M/L dB(A) 53/45
Sound pressure level(4) H/M/L dB(A) 41/33
Moisture removal l/hr 1.5
Condensate drain tube I.D mm 16
Dimensions WxHxD mm 815*280*170
Weight kg 9
Package dimensions WxHxD mm 890*240*340
Packaged weight kg 12
Units per pallet units 32
Stacking height units 8 levels
OUTDOOR
Refrigerant control Capillary tube
Compressor type, model Rotary, TOSHIBA PG225X2C-4FS
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 735
Air flow H/L m3/hr 1550
Sound power level H/L dB(A) 68
Sound pressure level(4) H/L dB(A) 58
Dimensions WxHxD mm 760*545*245
Weight kg 36 37
Package dimensions WxHxD mm 880*610*310
Packaged weight kg 39.5
Units per pallet Units 12
Stacking height units 3 levels
Refrigerant type R407C
Refrigerant chargless distance kg/m 1.01kg/4m
Additional charge per 1 meter g/m 4m<Lin<8m:+5g/m Lin>8m:+9g/m
Connections between
units
Liquid line In.(mm) Ф 1/4”(6.35)
Suction line In.(mm) Ф 1/2”(12.7)
Max.tubing length m. Max.15
Max.height
difference m. Max.7
Operation control type Remote control
Heating elements kW
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
Revision Y05-01 Service Manual - WMZ
Model Indoor Unit WMZ-17
Model Outdoor Unit GCZ-17
Installation Method of Pipe Flared
Characteristics Units Cooling Only Cooling Heating
Capacity (1) Btu/hr 17740 18080 18770
kW 5.2 5.3 5.5
Power input (1) kW 1.99 2.03 1.95
EER (Cooling) or COP(Heating) (1) W/W 2.61 2.61 2.82
Energy efficiency class D D D
Power supply V/Ph/Hz 230V/Single/50Hz
Rated current A 9.5 9.8 9.4
Starting current A 45
Circuit breaker rating A 15
INDOOR
Fan type & quantity Cross flow x 1
Fan speeds H/M/L RPM 1100/850
Air flow (2) H/M/L m3/hr 830/580
External static pressure Min-Max Pa 0
Sound power level (3) H/M/L dB(A) 60/54
Sound pressure level(4) H/M/L dB(A) 46/40
Moisture removal l/hr 2.2
Condensate drain tube I.D mm 16
Dimensions WxHxD mm 1115*330*200
Weight kg 13
Package dimensions WxHxD mm 1200*420*300
Packaged weight kg 17
Units per pallet units 16
Stacking height units 8 levels
OUTDOOR
Refrigerant control Capillary tube
Compressor type, model Rotary, TOSHIBA PG330X2CS-4KT3
Fan type & quantity Propeller(direct) x 1
Fan speeds H/L RPM 920
Air flow H/L m3/hr 2160
Sound power level H/L dB(A) 66
Sound pressure level(4) H/L dB(A) 55
Dimensions WxHxD mm 795*610*290
Weight kg 42 43
Package dimensions WxHxD mm 945*655*395
Packaged weight kg 45 51
Units per pallet Units 9
Stacking height units 3 levels
Refrigerant type R407C
Refrigerant chargless distance kg/m 1.3kg/7.5m 1.23kg/7.5m
Additional charge per 1 meter g/m 4m<Lin<8m:+5g/m Lin>8m:+15g/m
Connections between
units
Liquid line In.(mm) Ф 1/4”(6.35)
Suction line In.(mm) Ф 1/2”(12.7)
Max.tubing length m. Max.15
Max.height
difference m. Max.7
Operation control type Remote control
Heating elements kW
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.