Table of Contents
Related Manuals for Vulcan-Hart DUOMAX 244 Series
Summary of Contents for Vulcan-Hart DUOMAX 244 Series
- Page 1 Owner’s Guide Installation Instructions Gas Continuous Flow Water Heater 244, 246 series A20, A26 models This water heater must be installed and serviced by a qualified person. Please leave this guide with the householder.
- Page 2 Upon completion of the installation and commissioning of the water heater, leave this guide Warning: with the householder or a responsible officer. DO NOT leave this guide inside of the cover of the water heater, as it may interfere with the safe operation of the water heater or ignite when the water heater is turned on.
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Page 3: Table Of Contents
CONTENTS HOUSEHOLDER This booklet contains important information about your new water heater, including terms of the Vulcan warranty. We recommend you read pages 7 to 16, and the terms of the Vulcan warranty on pages 4 to 6. The other pages are intended for the installer but may be of interest. Warranty ............................ -
Page 4: Warranty
VULCAN DUOMAX GAS CONTINUOUS FLOW WATER HEATER WARRANTY – AUSTRALIA ONLY 244, 246 SERIES A20, A26 MODELS 1. THE VULCAN WARRANTY – GENERAL This warranty is given by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street, Rydalmere New South Wales, the suppliers of Vulcan DUOMAX gas continuous flow water heaters. - Page 5 VULCAN DUOMAX GAS CONTINUOUS FLOW WATER HEATER WARRANTY – AUSTRALIA ONLY 244, 246 SERIES A20, A26 MODELS Repairs, attempts to repair or modifications to the water heater by a person other than Rheem Service or a Rheem Accredited Service Agent. Faulty plumbing or faulty gas or power supply.
- Page 6 VULCAN DUOMAX GAS CONTINUOUS FLOW WATER HEATER WARRANTY – AUSTRALIA ONLY 244, 246 SERIES A20, A26 MODELS 4. ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY To be entitled to make a claim under this warranty you need to: Be the owner of the water heater or have consent of the owner to act on their behalf. Contact Rheem Service without undue delay after detection of the defect and, in any event, within the applicable warranty period.
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Page 7: Safety, Warnings, Installation Notes
SAFETY, WARNINGS, INSTALLATION NOTES It is important you read the following safety and warnings information. SAFETY AND WARNINGS The water heater heats the water to the preset outlet temperature setting. The outlet temperature setting • can be up to 75°C for a 244 series water heater or up to 50°C for a 246 series water heater. The temperature from a 244 series water heater is sufficiently hot to cause severe scalding. - Page 8 SAFETY, WARNINGS, INSTALLATION NOTES Do not spray aerosols in the vicinity of this water heater while it is in operation. Propellants and gases in • many aerosol sprays contain hydrocarbons which are flammable. Gases from aerosol sprays may also become corrosive when drawn into a flame. Do not use or store flammable materials in or near this water •...
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Page 9: About Your Water Heater
ABOUT YOUR WATER HEATER WATER HEATER APPLICATION This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable water. Its use in an application other than this may shorten its life. MODEL TYPE The Vulcan ®... - Page 10 ABOUT YOUR WATER HEATER HOTTER WATER INCREASES THE RISK OF SCALD INJURY Warning: This water heater can deliver water at temperatures which can cause scalding. Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure it is suitable for the application and will not cause scald injury.
- Page 11 CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A Vulcan DUOMAX 244 series continuous flow water heater can be installed as part of a circulated hot water flow and return system in a building. Refer to “Circulated Hot Water Flow and Return System” on page 22 for further information and notes on this type of installation.
- Page 12 ABOUT YOUR WATER HEATER HOW LONG WILL THE WATER HEATER LAST? The water heater is supported by a manufacturer’s warranty (refer to page 4). There are a number of factors that will affect the length of service the water heater will provide. These include but are not limited to the water chemistry, the water pressure, the water temperature (inlet and outlet) and the water usage pattern.
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Page 13: Maintenance Requirements
MAINTENANCE REQUIREMENTS GENERAL MAINTENANCE General maintenance can be performed by the dwelling occupant. It is recommended general maintenance be conducted every six (6) months or more regularly as required. Switch off the electrical supply at the power outlet to the water heater prior to performing general maintenance. This will prevent the water heater from operating while you clean or spray around the water heater. -
Page 14: Water Supplies
WATER SUPPLIES This water heater must be installed in accordance with this advice to be covered by the Vulcan warranty. This water heater is manufactured to suit the water conditions of most public reticulated water supplies. However, there are some known water chemistries which can have detrimental effects on the water heater and its operation and / or life expectancy. -
Page 15: Save A Service Call
SAVE A SERVICE CALL Check the items below before making a service call. You will be charged for attending to any condition or fault, which is not related to manufacture or failure of a part (refer to “Terms of the Vulcan Warranty” on page 4). COLD WATER FROM THE HOT TAP Close the hot tap, wait 10 seconds and open the hot tap again. - Page 16 SAVE A SERVICE CALL FAN CONTINUES TO RUN AFTER WATER HEATER OPERATION STOPS It is the normal operation of the water heater for the fan to continue running after heating of the water is finished. The fan may run for up to two minutes after the burners extinguish, to prepare for the next ignition. CLOUDS OF WHITE ‘VAPOUR’...
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Page 17: Installation
INSTALLATION THIS WATER HEATER IS FOR OUTDOOR INSTALLATION ONLY. THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING. Check the water heater is suitable for the gas type available. (refer to the rating label on the water heater) INSTALLATION STANDARDS The water heater must be installed: by a qualified person, and •... - Page 18 INSTALLATION WATER HEATER LOCATION The water heater is suitable for outdoor installation only and should be installed close to the most frequently used outlet and its position chosen with safety and service in mind. Make sure people (particularly children) will not touch the flue terminal. The flue terminal and air inlet must be clear of obstructions and shrubbery. Clearance must be allowed for servicing of the water heater.
- Page 19 INSTALLATION INSTALLATION WITHIN A COVERED AREA The water heater must be located such that the installation meets the requirements of AS/NZS 5601.1. There must be sufficient ventilation, so the water heater has an adequate supply of combustion air, and the flue products are readily dispersed safely and avoid being a nuisance.
- Page 20 INSTALLATION MAINS WATER SUPPLY Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting valve that does not have non-return valve characteristics (such as an RMC PSL series valve) is required and should be fitted as shown in the water and gas connection detail diagram on page 26. Model A20, A26 Relief valve setting...
- Page 21 INSTALLATION HOT WATER DELIVERY Warning: This water heater can deliver water at temperatures which can cause scalding. 246 series – 50°C Limited Outlet A 246 series water heater delivers water not exceeding 50°C in accordance with AS 3498. The risk of scald injury will be reduced.
- Page 22 INSTALLATION CIRCULATED HOT WATER FLOW AND RETURN SYSTEM A Vulcan DUOMAX 244 series continuous flow water heater can be installed as part of a circulated hot water flow and return system in a building. Notes the preset outlet temperature setting of the water heater must be set to at least 60°C.
- Page 23 INSTALLATION WATER TEMPERATURE DIAGRAMS 244 Series 246 Series Notes Temperature Limiting Devices – refer to “Hot Water Delivery” on page 21. • Factory preset outlet temperature setting is: • 244 series 60°C 246 series 50°C TECHNICAL DATA Models 244A20 244A26 246A20 246A26...
- Page 24 INSTALLATION DIMENSIONS – WATER HEATER...
- Page 25 INSTALLATION TYPICAL INSTALLATION – OUTDOOR LOCATION...
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Page 26: Connections - Plumbing
CONNECTIONS – PLUMBING All plumbing work must be carried out by a qualified person and in compliance with the Standard AS/NZS 3500.4 and all local codes and regulatory authority requirements. All gas work must be carried out by a qualified person and in compliance with the Standard AS/NZS 5601.1, all local codes and regulatory authority requirements. -
Page 27: Connections - Electrical
CONNECTIONS – PLUMBING PIPE SIZES The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing the most suitable pipe size to ensure adequate flow for each individual application. Reference to the technical specifications of the water heater and local regulatory authority requirements must be made. - Page 28 CONNECTIONS – ELECTRICAL WIRING DIAGRAM Wiring Diagram – 244, 246 Series A20, A26 Models...
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Page 29: Commissioning
COMMISSIONING All water heaters are tested and adjusted before dispatch from the factory, however further adjustments may become necessary because of local conditions. TO TURN ON THE WATER HEATER Open all of the hot taps in the house (don’t forget the shower). •... - Page 30 COMMISSIONING Gas Inlet Test Point Pressure To check the gas inlet pressure: Close any hot taps and ensure the burners are not operating. Close the gas isolation valve at the gas inlet to the water heater. Locate the gas inlet test point on the gas connection to the water heater.
- Page 31 COMMISSIONING BURNER GAS PRESSURE It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. To check and if necessary adjust the operational gas pressures, the electrical supply to the water heater must be switched on, the burners ignited and hot water must be flowing from a hot tap.
- Page 32 COMMISSIONING Notes If the burners extinguish and an error code 11 or 12 starts to flash on the LED display: • release the MIN and adjuster buttons close the hot tap clear the error code (refer to “Clearing Error Code” on page 32) ...
- Page 33 COMMISSIONING PRESET OUTLET TEMPERATURE SETTING The factory preset outlet temperature setting of the water heater is: 244 series 60°C • 246 series 50°C • It is usually not necessary to adjust the factory preset outlet temperature setting of the water heater unless the customer has a particular requirement for this to be done.
- Page 34 COMMISSIONING To check or adjust the preset outlet temperature setting: Switch off the electrical supply at the power outlet to the water heater. Remove the top and bottom cover strips to gain access to the front panel screws by pressing on the two ridged finger points and gently pulling forward.
- Page 35 COMMISSIONING OUTLET TEMPERATURE COMPENSATION ADJUSTMENT The outlet temperature compensation adjustment function is only applicable to 246 series A20 and A26 model water heaters. The maximum outlet temperature may be adjusted to compensate for temperature losses in the pipe work between the water heater outlet and fixtures used primarily for personal hygiene. Warnings After adjustment, the water temperature from the first tap in the hot water pipe work used for personal •...
- Page 36 COMMISSIONING Press the MAX button once to increase the outlet temperature setting to the next increment. The MAX button is located below the DIP switches and adjuster button, and above the MIN button. Each press of the MAX button will increase the outlet temperature setting by one increment.
- Page 37 COMMISSIONING TO TURN OFF THE WATER HEATER If it is necessary to turn off the water heater on completion of the installation, such as on a building site or where the premises is vacant, then: Switch off the electrical supply at the power outlet to the water heater (refer to note below). •...
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Page 38: Draining The Water Heater
DRAINING THE WATER HEATER To drain the water heater: Turn off the water heater (refer to “Turn Off The Water Heater” on page 37). • Open a hot tap (preferably the shower outlet). • Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet (244 series model) or •... - Page 39 This page is intentionally blank.
- Page 40 Revision Date: 2023 April 41-38064 121926 Rev-01...