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CFEWH SERIES 2 

 Three phase   |   INSTALLATION Manual © Mar 2022 |   MicroHeat Technologies Pty LTD  Page 

5

 of 

22

 

Pre-Installation - Checklist

  

 

 

Installation Checklist 

Please read through this section before commencing installation, to ensure you are familiar with the component parts 

and the fitting 

procedure.

 

This unit must be installed by:

 

A Licensed Electrician

, ensuring installation conforms to all current electrical wiring standards.

 

A Licensed Plumber, 

ensuring installation conforms to all current plumbing standards. 

NOTE:   THE INSTALLATION OF THE CFEWH SERIES 1 SHALL CONFORM TO THE PLUMBING CODE OF AUSTRALIA (PCA) 

The CFEWH should preferably be installed in a vertical position on an internal wall, or in an internal cupboard or space.

 

If the safety rules or the instructions outlined in this manual are not followed correctly, the unit may not operate properly 
and could cause damage to property, serious bodily injury and/or death.

 

MicroHeat nor its Distributors will be liable for any damages due to failure to comply with the installation and operating 
instructions outlined in this manual or through improper use.

 

Improper use includes the use of this appliance to heat any liquid other than potable water within the  conductivity 
range 

specified

 in this manual

. Refer to the Reference section 

 page 8. 

IP Rating 

 

The unit is rated as IP44. The appliance must be installed inside a dwelling or construction and should not be 

exposed to splashing water, rain or any circumstance that will allow water to enter the outside cover.

 

Maximum Rated Operating Water Pressure 

 

The maximum operating water pressure is 1 MPa / 10 bar / 150 PSI.

 

Pressure limiting valve on inlet side of unit 

 With maximum operating pressure 0.5 MPa / 5 bar / 73 PSI. 

Ambient Temperature 

 

The unit is intended for internal installation and should not be installed in an environment where 

there is a possibility of the ambient temperature dropping below 5°C.

 

Water Resistivity 

 

To ensure optimal operation, the resistivity of the incoming cold water supply should not be less than 

1.25kΩ

-

cm, and should not be greater than 12.5kΩ

-cm. If the unit is operated with water conductivities outside of this 

range, it will not function as specified. 

 

 

 

 

 

 

 

 

 

 

 

WARNING   

FOR CONTINUED SAFETY OF THIS APPLIANCE IT MUST BE INSTALLED, OPERATED AND MAINTAINED IN ACCORDANCE WITH THESE 
INSTALLATION INSTRUCTIONS. 

WARNING

 

In accordance with AS/NZS 3498:2020, if the manufacturers factory setting is 45°C then this appliance will not deliver temperatures exceeding 45°C. 
Water temperatures greater than 45°C can cause scalding. Care should be taken with children and people with limited sensory, physical, and/or mental 
capability. 
In accordance with AS/NZS 3498:2020, if the manufacturers factory setting is 50°C then this appliance will not deliver temperatures exceeding 50°C. 
Water temperatures greater than 50°C can cause scalding. Care should be taken with children and people with limited sensory, physical, and/or mental 
capability. 

NOTE:

 Compliance with AS/NZS 3498:2020 obviates the need to fit additional delivery temperature control. 

WARNING 

THIS  APPLIANCE  MAY  DELIVER WATER  AT  HIGH  TEMPERATURE.  REFER  TO  THE  PLUMBING  CODE  OF  AUSTRALIA  (PCA),  LOCAL REQUIREMENTS  AND 
INSTALLATION INSTRUCTIONS TO DETERMINE IF ADDITIONAL DELIVERY TEMPERATURE CONTROL IS REQUIRED. 

IMPORTANT

 

Failure to comply with the installation and operating instructions or improper use voids the warranty. Never remove the unit cover unless the electricity is 
turned off at the isolation switch or switchboard.

 

To reduce the risk of electric shock or injury to persons or property, please follow the installation instructions carefully.

 

IMPORTANT

 

Where the ambient temperatures are likely to approach freezing 

 ie: less than 5°C 

 the unit must be  drained of water to prevent frozen water damage 

occurring.

 

Failure to comply with the installation and operating instructions or improper use voids the warranty.

 

Summary of Contents for CFEWH 2-15

Page 1: ...Continuous Flow Electric Water Heater www microheat com au INSTALLATION OPERATION MANUAL CFEWH SERIES 2 Three Phase 415VAC 380VAC Licence No AS 3498 WM 022136 AS NZS 60335 2 35 A 13670EA N29465...

Page 2: ...tions 8 CFEWH Installation Procedure 9 CFEWH Mounting Installation 10 CFEWH Plumbing Electrical Installation 11 CFEWH Electrical Installation 12 Maximum Electrical Demand Calculation Error Bookmark no...

Page 3: ...hecklist on Page 5 before commencing the installation of any CFEWH unit This equipment requires three phase 415 VAC To avoid electric shock this equipment must only be opened and installed by a qualif...

Page 4: ...o reduced draw off Hot water reticulation energy losses significantly reduced Virtually maintenance free no scaling or element burn out Electric Instantaneous Water Heater EIWH vs Continuous Flow Elec...

Page 5: ...there is a possibility of the ambient temperature dropping below 5 C Water Resistivity To ensure optimal operation the resistivity of the incoming cold water supply should not be less than 1 25k cm an...

Page 6: ...ll Mounting Screws Not included in the packaging 2 CFEWH Top Cover 13 CFEWH Inlet Filter 3 CFEWH Heat Sink 14 PCB Terminal Block 4 CFEWH Flow Rate Sensor 15 Electric Mains Supply Cable Gland 5 CFEWH T...

Page 7: ...on off controlled inlet valve a water hammer arrestor must be mounted at the outlet of the CFEWH to reduce the water hammer effect during the automatic turning off of the water inlet valve of these a...

Page 8: ...nit Parameters Switch on Flow Rate 1 5 LPM Temperature Settable 1 C System Type Continuous Flow Electric Water Heater CFEWH Hot water market segment Electric Instantaneous Tankless Maximum Rated Opera...

Page 9: ...n connected to the terminal block 14 see page 12 Error Reference source not found The cable enters from the rear of the appliance 6 Carefully replace the plug and cable connecting the Display PCB LED...

Page 10: ...method used to x the unit to a vertical wall must be capable of continuously supporting a minimum weight of 10kg When mounting the unit onto a rough surface ie a brick wall or similar a backing board...

Page 11: ...or other circumstances does not stress the appliance unduly The inline water pressure limiting valve must be rated at 5 0 bar 72 5 psi 500 kpa The shutoff valve installed must not be a non return type...

Page 12: ...ctory limited to deliver a maximum of 45 C OR 50 C PIPE 1 that connects the TANDEM CFEWH HOT WATER OUTLET connected to SANITARY FIXTURE 1 n must be greater than 300 millimetres and plumbing piping and...

Page 13: ...WH is intended for use where the service current capacity of 100A per phase is supplied from a distribution network having a nominal voltage of 400 230 VAC Power Rating Amperage Table Printed Circuit...

Page 14: ...r kick is not required at start up STEP 1 Flush Flushing is required to clear the unit of plumbing debris that may have collected in the piping during installation This is done with the electric power...

Page 15: ...should be given to MicroHeat when making the service call is made Normal operation cannot be resumed by switching the appliance OFF and ON Manual Intervention Procedure is required refer pages 16 to...

Page 16: ...Outlet water temperature sensor open circuit a9 Blocking Resolving Flashing RED Outlet water temperature sensor short circuit aa Blocking Resolving Flashing RED AC Mains electrical supply failure ac...

Page 17: ...does not require any regular maintenance However to ensure consistent water ow it is recommended to periodically remove scale and dirt that may build up in the Inlet Filter 13 the faucet or in the sho...

Page 18: ...CFEWH SERIES 2 Three phase INSTALLATION Manual Mar 2022 MicroHeat Technologies Pty LTD Page 18 of 22 Dimensions NOTES...

Page 19: ...must be sized to supply the hot water in accordance with the guidelines in the MicroHeat CFEWH literature PROCEDURE FOR HONOURING WARRANTY 1 To initiate a claim for a warranty against defects the con...

Page 20: ...eat Technologies Pty LTD Page 20 of 22 MicroHeat Contact Details For Technical Support before and after Installation Phone 1300 981 325 Email info microheat com au MicroHeat Technologies Pty Ltd 20 Pi...

Page 21: ...CFEWH SERIES 2 Three phase INSTALLATION Manual Mar 2022 MicroHeat Technologies Pty LTD Page 21 of 22 PAGE LEFT INTENTIONALLY BLANK...

Page 22: ...CFEWH Mounting Template 8MM X 65MM Minimum length SCREWS UP CFEWH MOUNTING TEMPLATE...

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