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(e.g. 32ECS Series)
Thank you for purchasing this Dux Commercial Gas Continuous Flow Water Heater.
Before using, please:
Read this manual completely for operating instructions.
Confirm warranty and proof of purchase.
Keep this manual where it can be found whenever necessary.
Installation must conform with Plumbing Code of Australia (PCA) and local codes, or in the absence of local
codes, AS/NZS 5601, AS/NZS 3500.4, AS/NZS 3000 wiring regulations and all Local Building, Water and Gas fitting
regulations.
Dux reserves the right to discontinue, or change at any time, the designs and/or specifications of its products
without notice.
* Note: This appliance requires a minimum flow rate to operate of 2.5 litres/min., water fixtures with a flow rate
of 7.5 litres/min. or higher are recommended.
For optimum performance we recommend installation of Dux optional temperature controllers.
(For 50ECS and 50FCS Series, the temperature controller is supplied with appliance.)
SBB81FZ
Rev. 05/22
Owner's Guide
FOR CONTINUED SAFETY OF THIS APPLIANCE IT
MUST BE INSTALLED, OPERATED AND MAINTAINED
IN ACCORDANCE WITH THE MANUFACTURER'S
INSTRUCTIONS.
Condensing Models
50ECS Series
50FCS Series
32ECS Series
32FCS Series
Non Condensing Models
28ENS Series
28FNS Series
WARNING
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Related Manuals for Dux 50ECS Series
Summary of Contents for Dux 50ECS Series
- Page 1 AS/NZS 5601, AS/NZS 3500.4, AS/NZS 3000 wiring regulations and all Local Building, Water and Gas fitting regulations. Dux reserves the right to discontinue, or change at any time, the designs and/or specifications of its products without notice. * Note: This appliance requires a minimum flow rate to operate of 2.5 litres/min., water fixtures with a flow rate of 7.5 litres/min.
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Page 2: Important Safety Information
Owner’s Guide Important Safety Information If the information in this manual is not followed exactly, a fire or explosion may WARNING result causing property damage, personal injury or death. • Do not store or use petrol or other flammable vapours and liquids in the vicinity of this or any other appliance. - Page 3 Owner’s Guide DANGER Vapours from flammable liquids will explode Keep flammable products: and catch fire causing death or severe burns. 1. Far away from the Water Heater. Do not use or store flammable products such 2. In approved containers. as petrol, solvents or adhesives in the same 3.
- Page 4 2. Turn off the power to the Water Heater. 3. Turn off gas and water supply valves. 4. Call Dux on 1300 365 115 (Australia) or 0800 729 389 (New Zealand). Check the temperature of the running hot water before entering the shower.
- Page 5 Owner’s Guide WARNING Installation and service must be performed by a qualified installer, service agency or the gas supplier. Do not touch the power cord with wet hands. Do not install in locations where excessive dust or debris will be in the air. To prevent injury or death, do not allow Contact a qualified service technician for any small children to bathe or play in the...
- Page 6 Do not locate the Remote Controller near If it is snowing, check the air inlet, exhaust stoves or ovens. gas vent and exhaust vent terminal for This may cause damage or failure. blockage. Contact Dux before using with a solar heater.
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Page 7: Table Of Contents
Owner’s Guide Contents Important Safety Information Contents General Names and Functions of Controllers Initial Operation Clock Adjustment Setting and Using the Water Heater Automatic Water Heater ON or OFF Operation Locking the Remote Controller Customizable Settings <Misc settings> System Check For System [Rcrc] Enabling Automatic Recirculation Operation Manually Starting Recirculation Operation... -
Page 8: General
Owner’s Guide General These illustration shows an example of installation. The exact installation configuration may be slightly different. 50ECS, 32ECS and 28ENS Series: 50FCS and 32FCS Series: Outdoor Wall Mounted, Power flue Model Indoor Wall Mounted, Power Vent/Sealed Model (e.g. 32ECS Series) (e.g. - Page 9 Owner’s Guide 28FNS Series: 1. Flue Exhaust Indoor Wall Mounted, Power Vent/Sealed Model 2. Intake Pipe 3. Exhaust Pipe 4. Concentric Pipe 5. Front Cover 6. Air Inlet 7. Inlet water filter Inside Water Inlet (See page 33) 8. Gas Supply Valve 9.
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Page 10: Names And Functions Of Controllers
Owner’s Guide Names and Functions of Controllers Main Controller (RC-9018C) <Optional or Included> The Remote Controller will emit a tone when a button is pressed. Remote Controller Part Number The part number is printed on the surface of the cover. Cover shown in the open position. - Page 11 Owner’s Guide Display Screen • The display screen shown below is for illustration purposes only. The actual display will vary depending on how the Water Heater is being used. • After a button is pressed, the display will gradually become darker to prevent unnecessary power consumption by the Remote Controller.
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Page 12: Initial Operation
Owner’s Guide Initial Operation Before start using for the first time, do the following: 1. Open the water supply valve. 2. Open a hot water fixture to confirm that water is available, and then close the fixture again. Hot water fixture 3. -
Page 13: Clock Adjustment
Owner’s Guide Clock Adjustment NOTE • In the event of a power outage Operation or after disconnecting power to the Water Heater, when power is restored, the clock on the display 1. Press the MENU button inside the cover. screen will show “ - : - - ” and the clock will need to be reset. -
Page 14: Setting And Using The Water Heater
Owner’s Guide Setting and Using the Water Heater ]” If “System Tank is displayed, hot water will be 2. Set the temperature using the buttons inside the cover. discharged at the temperature of the storage tank. (See page 23) DANGER •... - Page 15 37°C, for safety, it cannot be raised above 43°C until all hot water taps are closed. (For some products) • Contact Dux to change the maximum temperature to 85°C. * Display when high temperature is set...
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Page 16: Automatic Water Heater On Or Off Operation
Owner’s Guide Automatic Water Heater ON or OFF Operation • If you set the time to turn ON or OFF the Power 5. Set the ON time to “AM 10:00” using the button, the Power button is automatically turned buttons. ON or OFF at the set time every day by just turning the PROG button ON. - Page 17 Owner’s Guide • If the display is left untouched for Tips for operation approximately 20 seconds without pressing the ENTER button, the setting will be completed. When the Power button is turned Following this procedure allows for automated ON, the home screen will be restored. control of Water Heater operation without user •...
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Page 18: Locking The Remote Controller
Owner’s Guide Locking the Remote Controller By locking the Remote Controller, the settings cannot be changed if a button is pressed by mistake. Operation 1. Press and hold Lock button for approximately 2 seconds to lock the Remote Controller. • This adjustment can be made whether the Power button is ON/OFF. -
Page 19: Customizable Settings
Owner’s Guide Customizable Settings Limiting the Maximum Output Display Screen Power Saving Mode [powersave dsply] Temperature To conserve power consumption of the display, the screen can be turned The maximum output off completely or set to only display the clock when the Power button is temperature can be limited to turned OFF. - Page 20 Owner’s Guide Adjusting the brightness of Muting the Remote Controller Error Tone Settings the display screen when the The Remote Controller can The Remote Controller can be Remote Controller is turned on be muted so that it does not muted so that it does not emit The display screen can be emit a tone when a button is a tone when an error occurs.
- Page 21 Owner’s Guide Draining the Water Heater Restoring Default Settings (Refer to page 30 for details.) The following settings can be restored to the factory default conditions. Operation • Maximum output temperature • Display screen power saving mode • Brightness of the display screen 1.
- Page 22 Owner’s Guide (Single Water Heater only) Flow Meter Alarm The flow meter alarm is being used to indicate when a tub is full. Operation NOTE • The hot water 1. The Power button is ON. filling temperature is same as •...
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Page 23: System Check
Owner’s Guide System Check • Depending on the configuration of your system, not all functions may be used. • If you press the STATUS button, you can check the status of the system. (See the picture to the right) • The pictures below (the number of Water Heaters, fixtures, and pumps) will vary depending on the configuration of the hot water system. -
Page 24: For System [Rcrc]
Owner’s Guide Enabling Automatic Recirculation Operation (For “System [ Rcrc ]”) • To check system status, see page 23. 5. Press the ENTER button. • When “Synchro ON/OFF” is set to Yes, recirculation can be activated automatically. • To change “Synchro ON/OFF” from Yes to No, follow the same procedure as described below. -
Page 25: Manually Starting Recirculation Operation
Owner’s Guide Manually Starting Recirculation Operation (For “System [ Rcrc ]” or Single Water Heater with recirculation pump) Recirculation operation can be manually stopped or 5. Press the ENTER button. started using this procedure. Operation (Display when recirculation is set to ON) 1. -
Page 26: Setting The Recirculation System Operation Timer
Owner’s Guide Setting the Recirculation System Operation Timer (For “System [ Rcrc ]”) • With the recirculation operation timer set, hot 4. Select “Recirc timer” using the buttons. water will be automatically circulated in the hot water pipes. Even with this function activated, it may take several minutes for hot water to be completely circulated through the plumbing system. - Page 27 Owner’s Guide 8. Select “AM 8:00” using the buttons. Add Additional Time Periods 1. After step 9 on page 27, select “Add” using the buttons. • Every time when you press the button, the time changes by one hour. 9. Press the ENTER button to complete the “End” •...
- Page 28 Owner’s Guide Cancel the Recirculation System Operation Timer 1. Carry out steps 1 to 5 on page 26. 2. Select “Cancelled”using the buttons. 3. Press the ENTER button. The screen returns to the “Recirc Menu”. • If the Power button is ON, the screen returns to the home screen in approximately 10 seconds.
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Page 29: Frost Protection
Owner’s Guide Frost Protection Take the measures below for NOTICE extremely cold temperatures*. * Outside temperature including wind chill factor • Damage can occur from frozen water within less than -15°C. the appliance and pipes even in warm environments. Be sure to read below for appropriate measures. - Page 30 Owner’s Guide 7. Open all drain plugs and drain the water out of If the water heater will not be used for the Water Heater. a long period of time, drain the water. 8. When the water is completely drained, reattach all drain plugs and close the hot water fixtures.
- Page 31 Owner’s Guide WARNING Do not touch the power cord with wet hands. 1. Check that all drain plugs are inserted. 2. Check that all hot water fixtures are closed. (50E/FCS Series) 3. Open the water supply valve. 4. Open a hot water fixtures to confirm that water is available, and then close the hot water fixtures again.
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Page 32: Regular Maintenance
Owner’s Guide Regular Maintenance Periodic Inspection Check : A For dust and soot in the flue exhaust. Check : B This Water Heater should be serviced by an authorised person at regular intervals not exceeding • For abnormal sounds during operation. 2 years. - Page 33 Owner’s Guide Inlet water filter If the inlet water filter is covered with debris, the hot water may not run smoothly, or the Water Heater may put out cold water. Check and clean the filter as explained below. WARNING To prevent burns or scalding, turn off the Power button and wait until the appliance cools before draining the water.
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Page 34: Troubleshooting
Owner’s Guide Troubleshooting Initial Operation [For recirculation systems] Flame Indicator lights up or goes out. The Water Heater does not attempt to ignite • During recirculation operation, the Water Heater when water is running. will turn on and off to keep the hot water pipes •... - Page 35 Owner’s Guide The water is too hot. The amount of hot water at a certain fixture is • Are the gas and water supply valves fully open? not constant. • Is the water temperature setting appropriate? • The maximum flow available from 50E/FCS (See page 14) Series is 50 L/min, from 32E/FCS Series is 32 L/ •...
- Page 36 (Condensing model only) Error Code : 29 Cause : Clogging of neutralizer Action : Check to see if the condensate drain pipe is clogged or frozen. (See page 32) Contact the installer or Dux Service Department for assistance.
- Page 37 Contact Dux 1300 365 115 (Australia) or 0800 729 389 (New Zealand). Error Code : 99 Cause : Abnormal combustion Action : Contact the installer or Dux Service Department for assistance. Contact Dux if: • Any other error code appears.
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Page 38: Follow-Up Service
If you want to reinstall the appliance at a different section. (See page 34-37) location, confirm that the gas and power supply If the error is not corrected, contact Dux Service indicated on the rating plate are available at the Department at 1300 365 115 (Australia) or 0800 new location. - Page 39 Owner’s Guide • If the display is left untouched for approximately 60 seconds, it will return to the previous screen. Check the status of the system 1. Press the STATUS button inside the cover. (Display Example) • Status can be checked regardless of whether the Power button is ON/OFF.
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Page 40: Specifications
• Specifications may be changed without prior notice. • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Item Specification Model Name 50ECS Series* 50FCS Series* Installation Outdoor, Wall mounted Indoor, Wall mounted Type... - Page 41 2.4 mm / 1.5 mm 2.2 mm / 1.6 mm Accessories Anchoring Screws *28FNS-50 Series are 50°C limited models. Performances Item Maximum Performance 50ECS Series* 32ECS Series Model Name 28ENS Series 28FNS Series* 50FCS Series* 32FCS Series Gas Consumption 328 MJ/hr...
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Page 42: Maintenance
Owner’s Guide Maintenance When water hardness is high, following maintenance (flushing the heat exchanger) is NOTE When draining, be sure to open all recommended. drain plugs. e. Close service valve (V1), and open shutoff 1. (For 50E/FCS-50 and 28FNS-50 Series only) valve (V3). - Page 43 Owner’s Guide WATER QUALITY All Dux water heating appliances are constructed from high quality materials and components and all are certified for compliance with relevant parts of Australian and New Zealand gas, electrical and water standards. Whilst Dux water heaters are warranted against defects, the warranty is conditional upon correct installation and use, in accordance with detailed instructions provided with the heater.
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Page 44: Manufacturer's Warranty
Dux continuous flow water heater Warranty: directly or indirectly due to defects of any kind in • 5 years heat exchanger warranty. a Unit will only be met by Dux where the damage • 2 year parts and labour. could be considered reasonably foreseeable and...
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