Rinnai HOTFLO EHFA Series Installation Manual

Rinnai HOTFLO EHFA Series Installation Manual

Mains pressure vitreous enamel electric storage water heater

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Installation Manual
HOTFLO (EHFA/EHFD) Series
Mains Pressure Vitreous Enamel
Electric Storage Water Heater
This appliance must be installed in accordance with:
• Manufacturer's Installation Instructions
• Municipal Building Codes
• Current AS/NZS 3000 Wiring Rules
• Current AS/NZS 3500.4 Plumbing and Drainage - Heated Water Services
• All local regulatory requirements, including all local OH&S requirements
This appliance must be installed, maintained and removed by a Qualified Person.
This Appliance complies
For continued safety of this appliance it must be installed and maintained in
with cusrrent AS 3498
SAI GLOBAL LIC. WMKA00169
accordance with the manufacturers instructions.

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Summary of Contents for Rinnai HOTFLO EHFA Series

  • Page 1 Installation Manual HOTFLO (EHFA/EHFD) Series Mains Pressure Vitreous Enamel Electric Storage Water Heater This appliance must be installed in accordance with: • Manufacturer’s Installation Instructions • Municipal Building Codes • Current AS/NZS 3000 Wiring Rules • Current AS/NZS 3500.4 Plumbing and Drainage - Heated Water Services •...
  • Page 2 Rinnai EHFA/EHFD HW IM...
  • Page 3: Table Of Contents

    Electrical Supply ������������������������������������������������������������������������������������������������������������������������������������������������������������������ 17 Electrical Connections ��������������������������������������������������������������������������������������������������������������������������������������������������������� 17 Wiring Diagrams ������������������������������������������������������������������������������������������������������������������������������������������������������������������ 18 Thermostat Setting ������������������������������������������������������������������������������������������������������������������������������������������������������������� 18 Commissioning To fill & turn ‘ON’ the water heater �������������������������������������������������������������������������������������������������������������������������������������� 19 To turn ‘OFF’ the water heater �������������������������������������������������������������������������������������������������������������������������������������������� 19 Contacts Rinnai EHFA/EHFD HW IM...
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  • Page 5: Warnings & Safety

    Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death. YourRinnaiHotfloMainsPressureVitreousEnamelElectricStorageWaterHeaterhasbeen certified by relevant plumbing and electrical authorities and the details are shown on data plate.
  • Page 6: Safety

    Installing tempering valves or thermostatic mixing valves which reduce the hot water temperature delivered tothetaps.Yourlocalplumbingauthoritymayalreadyrequirethatthesebefitted.Contactyourinstaller orlocalplumbingauthorityifindoubt. Never…. Leave a toddler in the care of another child. They may not understand the need to have the water temperature set at a safe level. Rinnai EHFA/EHFD HW IM...
  • Page 7: Safety Devices

    If the valve dribbles or leaks continuously, operate the easing gear for a few seconds� This may dislodge any foreign matter and stop leakage� If leakage does not stop Contact Rinnai to arrange inspection by a qualified person.
  • Page 8: Important Information

    It is recommended that the anode be inspected at least every 5 years. The factory fitted Rinnai anode is Magnesium based� This anode is suitable when the total dissolved solids (TDS) content in the water supply does not exceed 600 mg/L, which is the case in most areas� In areas where the total dissolved solids (TDS) content in the water supply exceeds 600 mg/L the Rinnai aluminium based anode is required�...
  • Page 9: Care & Maintenance

    Rinnai service network personnel are fully trained and equipped� If your Rinnai appliance requires servicing contact Rinnai as per the details on the back page of this manual� Rinnai recommends that this commercial appliance be inspected and serviced by a qualified person every 12 months.
  • Page 10: Specifications

    In accordance with AS/NZS 3500.4 12� Safe Tray & drain Where required, in accordance with AS/NZS 3500.4 RemovalandconnectionbyqualifiedpersonsONLY,inaccordancewithAS/NZS3000 ValveswithpressureratingsotherthanspecifiedareunsuitableandMUST NOTbeused. NOTE WATER HEATER - located closest to most frequently used outlet - Access for service in the installed position. Rinnai EHFA/EHFD HW IM...
  • Page 11 (kPa) PLV pressure rating Rated Capacity Hot Water Litres (l) Lower 2400 3600 2400 3600 4800 3600 4800 Heating Element Upper 3600 4800 3600 4800 Inlet/Outlet Connections 3/4" (20 mm) APLVisnotsuppliedwiththesemodels.APLVMUST BEfittediftheMainsPressureexceeds thelimitsshown.IfthemainspressureiswithinthelimitsshownfitmentofthePLVisoptional. NOTE However,itisrecommendedthatthePLVisfittedinallinstallationsasitaidswaterandenergy conservation. Rinnai EHFA/EHFD HW IM...
  • Page 12: InstallationMethods

    It may be a requirement that the hot and cold water supply pressures to a Temperature Limiting Device (TLD) are equal� If this is the case, a PLV with the same pressure rating as the PLV for the hot water is required for the TLD as shown� Rinnai EHFA/EHFD HW IM...
  • Page 13: Hot Water Plumbing System Example / Flow & Return Pipe Work - No Tld

    BATHROOM Temperature Valve (Supplied) Valve TO DRAIN Limiting Device (TLD) ENSUITE Non-return Valve COLD SUPPLY WATER HEATER Isolating Non-return Valve Valve TO DRAIN (Not Supplied) ValveswithpressureratingsotherthanspecifiedareunsuitableandMUST NOT beused. Forratingssee"Table2.Ratings&OtherSpecifications"onpage11. Thisschematicisanexampleonly,variationsmayalsobesuitable. CAUTION TemperedwaterfromaTLDCANNOTbere-circulated.TheTLDMUST BE positioned in adeadleg,branchingoffthecirculatedhotwaterflowandreturnpipe. Rinnai EHFA/EHFD HW IM...
  • Page 14: Installation

    This appliance is NOTsuitable for use as a spa or swimming pool heater� LOCATION The Rinnai Hotflo (EHFA/EHFD) storage water heater range have an ingress protection rating of IPX4 making them suitable for internal or external installation� The water heater should be placed as close as practicable to the most frequently used hot water outlet point or points to minimize the delay time for hot water delivery�...
  • Page 15: Thermostat Setting

    Rinnai recommend that an approved TLD is fitted into the hot water pipe work from the water heater to areas used primarily for personal hygiene such as bathrooms and ensuites to reduce the risk of scalding�...
  • Page 16: Pressure And Temperature Relief (Ptr) Valve

    In areas where water pipes are prone to freezing, drain lines MUSTBEinsulated and NOT exceed 300mm in length� In this case the drain line MUST discharge into a tundish through an air gap of between 75mm and 150 mm� Rinnai EHFA/EHFD HW IM...
  • Page 17: Electrical Supply

    Inspect and ensure that all wiring links are secure prior to fixing the access cover and turning the POWER ON� To ensure the Over-temperature and Energy Cut-out is set, press the (red) 'reset' button on the Thermostat� Rinnai EHFA/EHFD HW IM...
  • Page 18: Wiring Diagrams

    The water heater as delivered will have the thermostat preset to 70°C� EnsurethepowersupplyisswitchedOFFbeforeremovingtheaccesscovertotheelementand thermostat. WARNING TheaccesscovertotheelementandthermostatMUST ONLY BEremovedbyanElectricianor othersuitablyqualifiedtradesperson. ThethermostatsettingMUST ONLY BEadjustedbyanelectricianorothersuitablyqualified trades person. Afteradjustment,pressthe(red)‘Reset’Buttononthethermostatstoensuretheover-temperature andenergycut-outisset. Rinnai EHFA/EHFD HW IM...
  • Page 19: Commissioning

    It may be necessary to turn off a water heater after installation and commissioning, for example during building activities or if the premises are vacant� 1� Isolate or turn 'OFF' the water heater at the electricity supply� 2� Close the cold water isolation valve at the inlet to the water heater� Rinnai EHFA/EHFD HW IM...
  • Page 20: Contacts

    Braeside, Victoria 3195 For further information visit: www.rinnai.com.au Rinnai has a Service and Spare Parts network with personnel who are fully trained and equipped to give the best service on your Rinnai appliance. If your appliance requires service, please call our National Help Line. Rinnai recommends that this appliance be serviced every year.

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