MicroHeat | CFEWH SERIES | Installation manual | MicroHeat CFEWH SERIES Installation manual

Hot water just got smarter
Continuous Flow Electric Water Heater
INSTALLATION MANUAL
CFEWH SERIES 1-10
Single Phase CFEWH Series 1-10 Premium Model. Extension pipe cover sold separately.
www.microheat.com.au
Introduction
Contents
This Installation Manual covers Series 1-10 Premium and Standard models of the
Continuous Flow Electric Water Heater [CFEWH].
Voltage
Introduction
03
The CFEWH is Single Phase 240VAC Live-Neutral/Ground.
About This Product
04
Full specifications are on page 19 in the Reference section.
Pre-installation
06
06
07
07
08
Installation Checklist
Installation Locations – Options
Installation as a Tandem Hot Water Service
Component Guide
Installation
Installation Procedure
Exterior Cover Removal and Replacement
Mounting to the Wall
Connection to Plumbing
Connection to Power
Preparation for Use
09
09
10
10
13
16
18
Reference section
19
19
20
20
20
20
20
21
22
22
23
24
25
Product Specifications
Flow Rates and Output Water Temperature
Maximum Rated Operating Water Pressure
Water Resistivity
IP Rating
Ambient Temperature
Dimensions
Diagnositics and Error Descriptions
Mechanical Lockout Error
Manual Intervention
Maintenance
Warranty
Notes
26
Contact Details
27
03
Premium CFEWH
Standard CFEWH
CFEWH SERIES 1-10P
CFEWH SERIES 1-10S
The Exterior Cover includes a
display showing Output Water
Temperature and Flow Rate
The Exterior Cover has only a
RED/GREEN indicator LED.
IMPORTANT
The company accepts no responsibility for the failure of this appliance if it has not been installed and operated in accordance with the
instructions provided. The information in this Manual is correct as at 1 April 2013, but the manufacturer reserves the right to make changes to
specifications without prior notice. All information provided E&OE. Copyright © 2013 All Rights Reserved. MicroHeat and its associated logo are
Registered Trademarks of MicroHeat Technologies Pty Ltd. MicroHeat products are manufactured under one or more Patents, which are in force.
The Product is Patent Cooperation Treaty (PCT) Protected, and Trademarks Protected
Please ensure you read through the Installation Checklist on page 6 before commencing
installing any unit.
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
About This Product
About the Continuous Flow Electric Water Heater [CFEWH]
What makes this product so unique
and different?
The Continuous Flow Electric Water Heater [CFEWH]
uses innovative new technology to deliver hot water
instantly … and achieve impressive efficiencies in both
water and energy usage.
We’d like to explain how it’s so different from other hot
water systems – and why it’s setting completely new
standards.
To fully appreciate the difference – and the substantial
benefits – offered by the technology used in this water
heater, we need to start off by comparing the main
deficiencies of traditional hot water systems.
Heating water the traditional way
Traditional centralised hot water services consume
continuous energy to heat water and then maintain it
at a defined (thermostat-controlled) temperature, ready
for when it’s wanted. Typically, the water heater is
located away from where the water is wanted, relying on
lengths of pipe to deliver the water. Energy is therefore
wasted keeping quite a large volume of water at a stable
temperature – often at a higher temperature than would
ever be used.
But that’s not all – water is wasted every time a hot water
tap is turned on. That’s because you need “to let the
water run” until the water held in the pipes has made way
for the hot water you want, coming from the water heater.
04
The overall result is quite inefficient usage of power
together with wastage of water.
The MicroHeat difference
Hot water just
got smarter
The engineers at MicroHeat set out to create something
completely different from existing methods of providing
hot water: a highly efficient new method of heating water
that would address the wastage of valuable resources –
energy and water.
The Continuous Flow Electric Water Heater [CFEWH]
is a very compact unit, which provides an instant and
continuous flow of hot water wherever it’s required –
delivered through very short lengths of pipe. Water isn’t
wasted, because you’re not leaving it running, waiting for
it to get hot. Hot water is always at a stable temperature,
despite any fluctuations in water pressure.
The secret of “optimised” energy
The unit intelligently optimises the amount of energy it
needs to heat water, depending on how much water you
want.
For example, let’s assume hot water is required at 45°C.
If you want a fairly fast flow of water – 4 litres a minute –
the unit will use its full power – 9.6kW – to heat the water.
However, if you only want a low flow of water – 1.5 litres a
minute – the unit will use just 4.2kW to heat the water.
The benefit is the unit can intelligently vary itself between
being a 9.6kW and 4.2kW system. The lower flow rate
achieves 56% less energy consumption – and that
contributes to lowering power bills.
In addition, varying the flow rate of the water contributes
to lower water consumption and achieves further savings.
Reducing water flow from 4 litres a minute to 1.5 litres a
minute lowers water consumption by 66%.
Incoming water temperature makes
a difference
The unit also achieves savings in another area – by
intelligently varying its power between 9.6kW and 7kW
to heat incoming cold water.
Depending on where you’re located and what season
it is, mains cold water temperature could potentially
fluctuate anywhere between 10°C and 25°C.
Let’s again assume hot water is required at 45°C and you
want a fairly fast flow of hot water – 4 litres a minute.
If the incoming water temperature is a fairly chilly 10°C,
the unit will apply its full power of 9.6kW – however, if it’s
a pleasantly warm 25°C, it will only use 7kW. That’s 20%
less energy consumption – making a further contribution
towards lowering power bills.
We hope you now have a better
understanding of how the Continuous
Flow Electric Water Heater [CFEWH] is
revolutionising hot water.
You don’t need a science degree to understand how the
efficiencies and savings are achieved – all you need to do
is follow our simple explanation.
Although the Continuous Flow Electric Water Heater [CFEWH] is very safe to use, this appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
05
Pre-installation
Pre-installation
Installation Checklist
Installation Locations – Options
Please read through this section before commencing installation, to ensure you are familiar with the
component parts and the fitting procedure.
These suggested options show how the unit can be fitted in three situations, covering bathroom, kitchen and
laundry.
This unit must be installed by:
Please note that the location and installation of the unit is not limited to the options shown here.
A Licensed Electrician, ensuring installation conforms to all current electrical wiring standards.
The CFEWH must be installed in a vertical position on an internal wall, or in an internal cupboard or space.
A Licensed Plumber, ensuring installation conforms to all current plumbing standards.
The CFEWH must 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.
Hot
Water
Faucet
CFEWH SERIES 1-10
Pressure
Limiting
Valve
Hot Water OUT
Basin
Hot
Water
Faucet
Hot
Water
Faucet
Basin
Hot
Water
Faucet
Basin
Basin
Shutoff
Valve
Cold Water IN
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 19.
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.
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.
Hot
Pressure Water
Faucet
Limiting
Valve
Basin
WARNING
In accordance with AS 3498, this appliance will not deliver temperatures exceeding 50°C.
Water temperatures greater than 50ºC can cause scalding. Care should be taken with children
and people with limited sensory, physical, and/or mental capability.
Hot Water OUT
Hot
Water
Faucet
Shutoff
Valve
07
Shower
Cold Water IN
There is no requirement in AS/NZS 3500.4 to fit a temperature limiting device if this water heater is
installed in any location other than in an early childhood centre, school, nursing home or a facility
for young, aged, sick or disabled people, where temperature limiting devices may be required.
NOTE: All options can be installed without
cold using Pre-set Temperature
CFEWH SERIES 1-10
IMPORTANT
Failure to comply with the installation and operating instructions or improper use voids the warranty.
Hot
Water
Faucet
Pressure
Limiting
Valve
Hot Water OUT
Shutoff
Valve
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.
Kitchen
Sink
Cold Water IN
06
CFEWH SERIES 1-10
Hot Water IN
Washing
Machine
Cold Water IN
Hot Water OUT Pre-set Temperature
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.
NOTE
This appliance can also be fitted as a Tandem Hot Water Service.
Please refer to the Tandem Hot Water Service Guide for full information.
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
Pre-installation
Installation
Component Guide
Installation Procedure
This is an at-a-view guide to the 12 steps required to install the unit.
1. Remove the CFEWH Exterior Cover (10).
It will allow you to become familiar with the component parts of the unit and will assist you during the
installation process. Full details for wall mounting, electrical and plumbing installation are provided in the
following sections.
2. Carefully remove the Display PCB/LED plug and
17
cable (19) (See Page 17) connecting either the
Display PCB or Indicator LED on the outside of
the Exterior Cover to the PCBA (8).
3. Mount the unit onto the wall. (See page 11)
16
18
When power is first applied to the unit, the initial
start up check begins, and the LED will change
colour from GREEN to RED while the check
sequence is ongoing.
After the initial start up check is complete, and
no errors are detected, the LED on the front of
the Exterior Cover (10) should illuminate GREEN
and flash slowly.
In the event of a system error or failure, the LED
will either flash or illuminate RED. See page 22
in the Reference Section for the List of Error
Descriptions.
If the LED illuminates RED constantly, the unit
has entered an irresolvable error condition, and
requires technical intervention.
• Switch off the Isolation Switch to turn
the unit OFF.
• Contact MicroHeat Technical Support
on (03) 9681 7088.
If the LED flashes RED, the unit has entered a
resolvable error.
The LED will continue to flash RED until the unit
control has resolved the problem.
• Once resolved, the LED will stop
flashing RED, and will change to
slow/fast flashing GREEN.
4. The electricity supply cable must be brought
through the electric gland, and then mounted.
The cable enters from the rear of the appliance.
10
5. Ensure the Circuit Breaker and the Isolation
Switch (if installed) supplying the Live 240VAC
electrical mains to the CFEWH is turned OFF.
12
1
9
13
5
(5.0 bar/72.5 psi/500 kpa) and Shutoff Valve –
not a Stop Tap.
15
11
4
8
and pressure limiting valve to the unit.
3
CFEWH SERIES 1-10
1
CFEWH Chassis
2
CFEWH Top Cover
3
CFEWH Heat Sink
CFEWH Flow Rate Sensor
5
CFEWH Temperature Sensor, Receptacle, Cable and Plug Assembly
6
CFEWH Half Inch Inlet Water Connection
7
CFEWH Half Inch Outlet Water Connection
8
CFEWH PCBA V6.2
9
CFEWH Earth Locking Mechanism
10
SERIES 1-10 – CFEWH Exterior Cover (Premium)
11
Pan Phillips Head Self Tapping Screw x 2 – Exterior Cover Screws
Included in the packaging – provided separately in the small satchel
ITEM
PART NUMBER
12
CFEWH Wall Mounting Screws (Not included in the
packaging)
13
CFEWH Inlet Filter
14
PCB Terminal Block
15
Electric Mains Supply Cable Gland
16
RED/GREEN LED – CFEWH (GREEN Ready/RED Error)
17
Flow Rate/Temperature Setting Display
18
Extension Cover (Optional)
19
Display PCB, Cable and Plug*
20
Display PCB (CFEWH SERIES 1-10 Premium ONLY)*
21
Reset Button*
Connect the cold water in to the Inlet Water
Connection (6) (BLUE). NOTE: Flush the cold
water line before connecting to the unit.
9. Connect the hot water supply to the point of use.
Connect the hot water from the Outlet Water
Connection (7) (RED) to the point-of-use.
10.Run water through the unit without power to
ensure there are no leaks.
12.If the LED is slow flashing GREEN, the unit is in
standby mode and is ready for use.
13.Turning hot water on will initiate the heating
process and hot water should exit from of the
point of use water outlet. The LED will illuminate
as fast flashing GREEN.
Turn the water OFF.
11.Switch ON the Circuit Breaker and Isolation
Switch supplying the electric mains power to the
unit and check if the unit is turned ON. Check
the indicator LED (16) on the Exterior Cover (10).
IMPORTANT If the system errors
persist, there is a system failure that
requires technical intervention.
8. Connect the water supply via the shutoff valve
PART NUMBER
Place the Exterior Cover (10) over the Chassis (1)
and securely affix the two Exterior Cover Screws
(11).
7. Connect the Water Pressure Limiting Valve
6
ITEM
Connect Live (L)/Neutral (N) and Ground to the
CFEWH PCB via the PCB Terminal Block (14).
Page 17) connecting the Display PCB/LED
indicator to the PCBA (8).
7
08
Bring the electrical mains supply cable through
the Electric Mains Supply Cable Gland (15) at
the top right side of the CFEWH Chassis (1).
6. Carefully replace the plug and cable (19) (See
2
14
4
If there is no power supplied to the unit, the LED
will not be illuminated.
NOTE It is possible for the water to
be too pure. This is not an error
condition. In this situation, the appliance
will simply perform poorly and will not
operate as specified. The orange LED
located on PCBA (8) will be constantly
illuminated. (See page 23 for the location
of the orange LED).
*shown on page 17
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
09
Installation
Installation
Exterior Cover Removal and Replacement
Mounting to the Wall
The procedure for removing the Exterior Cover requires the following steps:
The unit must be mounted onto a solid internal wall, or in an internal cupboard or space, in the vertical
position using the 4 x Mounting Screws (12) placed within the Mounting Screw Hole Locations as shown.
The maximum screw head diameter is 8mm. A screw head larger than 8mm will damage the mounting boss
and crack the body. THIS WILL VOID THE WARRANTY.
The mounting method used to fix 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 should be mounted
to the wall first. The unit can then be mounted onto the backing board. This will allow the Exterior Cover (10)
to be properly fitted to the unit.
WARNING
Body must NOT be drilled,
note: "NO DRILL" symbols
located on Flange
Step 1
Find a clean flat surface and place the unit on its back.
Using both your thumbs and forefingers, grip the Exterior Cover (10) firmly along the bottom
of the unit, and push the cover slowly up to separate it from the Body of the unit.
IMPORTANT: Do not pull cover away completely just yet.
10
11
8.2in
207.6mm
6.6in
168.9mm
When the Exterior Cover is about 45° from the Body,
reach into the unit and disconnect the LED Indicator/
Display PCB Plug and Cable (19) (See Page 17) from the
socket on the PCBA.
Using a Phillips head
screwdriver, affix the Pan
Phillips Head Self Tapping
Screws x 2 (11) (provided
separately in the small
satchel) to secure the exterior
cover to the chassis. It is a
safety requirement to ensure
the unit cannot be easily
opened.
You can now lift off and separate the Exterior Cover
completely from the Body.
To replace the Exterior Cover, do the same
steps in reverse AND THEN MOVE ONTO STEP 3.
0.2in
4.4mm
12.3in
311.4mm
Step 3
Mounting Screw
Hole Locations
CFEWH SERIES 1-10
|
3.9in
100mm
1.6in
39.5mm
INSTALLAtion Manual ©2013
6.7in
170mm
|
1.4in
35.5mm
Step 2
5.3in
135mm
11.2in
285mm
12
MicroHeat Technologies Pty Ltd
Installation
Installation
Mounting to the Wall (cont.)
Connection to Plumbing
The installation must comply with the relevant Australian Standards and Industry Codes: Plumbing and
drainage – Heated water services AS/NZS 3500.4
IMPORTANT
When mounting the unit to a wall, it is very important that no holes are drilled within the
area shown below in RED.
The Cable Gland Fitting hole (15) must not be opened out.
Holes drilled within this area, or opening out the Cable Gland Fitting hole, will make the
unit inoperable and irreparable. It will also void the warranty.
The Inlet (6) and Outlet (7) water connections are both ½” BSP SERIES GB.
Mount the appliance in a vertical position on an internal wall, or in an internal cupboard or space first – then
connect the hot and cold water to the appropriate connections:
Inlet (6) Cold Water – BLUE
The cold water supply pipe must be flushed before
connecting the cold water supply to the inlet (6).
Outlet (7) Hot Water – RED
Effective operation of the unit requires the hot water
outlet to be connected to the hot water faucet/valve.
Ensure the Inlet Filter (13) is installed as shown.
15
12
Electric
Mains
Supply
Cable Gland
Fitting
13
7
6
HOT WATER
OUTLET
COLD WATER
INLET
13
INLET FILTER
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
Installation
Installation
Connection to Plumbing (cont.)
Connection to Plumbing (cont.)
Water Inlet Pressure Limiting Valve and Shutoff Valve Connection
Acceptable inlet/outlet connections
The unit is a closed outlet water heater and is intended to operate at the pressure of the water mains, where
the flow of water is controlled by one or more faucets/valves in the outlet line.
The Inlet (6) and Outlet (7) water connections are both ½” BSP SERIES GB.
The unit can be installed into any type of commercial or residential construction as per the current Plumbing
Standards.
However, it is mandatory for a water pressure limiting valve and a shutoff valve to be connected in series with
the unit’s cold water inlet connection (6).
There are three options for inlet/outlet connections with this unit:
Braided Hose without seal
Min. angle
• The unit is designed to operate at 10 MPa/10 bar/150 PSI.
• The installation of a pressure limiting valve – a mandatory requirement – ensures that excess water pressure
applied, as result of water hammer and/or other circumstances, does not stress the appliance unduly.
90° 2.0
A
A C E
30°
E
• 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 valve.
F
Metal or plastic olive
Braided Hose with seal
CFEWH SERIES 1-10
14
90° 2.0
OUTLET
Hot Water OUT
15
E
INLET
WATER
PRESSURE
LIMITING VALVE
5 bar/500kpa
F
Straight Copper Tube
Cold Water IN
1 min
SHUTOFF VALVE
MUST NOT BE
A NON-RETURN TYPE VALVE
IMPORTANT
7.0 to 10.0
1
12 min
90° 2.0 A
E
F
X
Metal or plastic olive
2.5 0.1
MicroHeat nor its Distributors will be liable for any damages through failure to comply with
the installation and operating instructions outlined in this manual – specifically in this instance
where the specified water pressure limiting valve and shutoff valve type, as indicated, must be
installed with this unit.
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
Installation
Installation
Connection to Power
Connection to Power (cont.)
The unit must be connected to Live-Neutral/Ground (LNG) Electrical Mains Supply.
In accordance with the wiring rules, AS/NZS 3000:2007 and IEC 61000-3-11, the CFEWH is intended for use
in premises having a service current capacity ≥100 A per phase, supplied from a distribution network having
a nominal voltage of 400/230 VAC. The Live-Neutral electrical supply connections Live, Neutral and Ground
(Earth
) must be permanently connected to the Terminal Block (14) mounted on the PCBA V6.2 as shown
– noting the correct polarity Live – L and Neutral – N.
The appliance must be connected to the mains supply with fixed wiring. The appropriate mains isolation
switch must be incorporated in-line with the fixed wiring electrical supply.
IMPORTANT
IMPORTANT
This unit is classified as a Class I Bare Element Water Heater. The appliance must be correctly
connected to the mains earth.
In order to prevent a hazardous circumstance occurring due to the inadvertent resetting of the
thermal cut out, the electrical supply to this appliance must not be supplied through an external
switching device, such as a timer – nor can it be connected to a circuit that is regularly switched
on and off by the electricity supply utility.
Live-Neutral/Ground (LNG) connection is polarity dependent.
Incorrect wiring connection will cause FC – Earth Leakage Detection Error.
Bring the Live, Neutral supply through the Electric Mains Supply Cable Gland (15) as shown.
The LIVE wire must be connected to the terminal L
The NEUTRAL wire must be connected to the terminal N
The EARTH Wire (GREEN/YELLOW) must be connected to the terminal
19
16
LED Indicator/Display PCB Plug and Cable
17
15
Residual Current
Circuit Breaker
with Overload
Protection - RCBO
Isolation Switch
Electric
Mains Supply
Cable Gland
8
Printed
Circuit Board
Assembly (PCBA)
20
N
E
U
T
R
A
L
E
A
R
T
H
L
I
V
E
Display PCB
21
14
PCBA Reset
Button
Terminal
Block
240VAC
The earth bracket wire provided must
ALSO be connected to the Terminal Block,
together with the electric mains earth connection.
CFEWH SERIES 1
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
Installation
Reference
Preparation for Use
Product Specifications
After installation, this two step procedure must be followed.
All specifications, stated operational flow rates and output water temperatures are valid within the range of
water conductivity:
The unit must be primed – this is required only once – nominally at installation.
(Priming is only required when the electricity supply to the unit has been turned off/removed from the unit – for
example, after a power failure or an isolation switch OFF condition).
Priming is required to set the unit up environmentally to ensure that the heating ramp-up time from start during
normal operation will be as short as possible, without incurring power overshoot.
Once primed, the unit will ramp-up to the optimised power required at the time without overshoot.
Note: Power overshoot typically results from the maximum power input required to get a heat exchanger up to
working temperature as quickly as possible. However, as the unit does not incorporate a heat exchanger,
this initial power ‘kick’ is not required at start up.
18
• 80µS/cm to 800µS/cm + 15% at 20°C (µS–microSiemens)
• 1.25kΩ-cm to 12.5kΩ-cm +15% at 20°C
NOTE: Water conductivity may be less than 80μS/cm. Reduce flow rate to achieve comfortable water temperature.
Water conductivity greater than 800μS/cm + 15% will generate an error condition. In this circumstance, the
appliance will shut down safely and without damage.
Single Phase – CFEWH Series 1-10
Model
CFEWH Series 1-10
System Type
Continuous Flow Electric Water Heater (CFEWH)
STEP 1: Flush
Heating Method
Optimised Direct Energy Transfer
• Flushing is required to clear the unit of plumbing debris that may have collected in the piping during
installation. Remove the Inlet Filter (13) whilst doing this and replace after flushing.
Capacity
400 ml
Dimensions (Without Extension Cover)
Height 295mm x Width 210.50mm x Depth 125mm
• This is done with the electric power supply turned off.
Electrical Rating
• Flushing should be allowed to continue for 1 to 2 minutes.
Rated Power
9.6 kW
Voltage
240 VAC
Rated Amperage
40 AMPS
Frequency
50 Hz
Electrical Connection
Live / Neutral / Ground
STEP 2: Prime
• Turn the electricity supply on – check for the LED (16) slow flashing GREEN. The unit is now in stand-by mode.
• Turn on the hot water faucet to a flow rate greater than 1.5ltr/min (the unit will start heating – check for LED
(16) fast flashing GREEN), and allow the unit to run for about 3 minutes.
The unit is now primed and ready for use.
19
Operating Parameters
Switch on Flow Rate
1.5 ltr/min
Maximum Rated Operating
Line Pressure
10 MPa / 10 bar / 150 PSI
Output Water Temperature
50°C (Factory Setting)
Minimum Output Water
Temperature
20°C
Maximum Output Water
Temperature
50°C*
*In accordance with AS/NZS 3498 Section 7.2.1
The CFEWH SERIES 1-10 does NOT require the installation of Tempering Valves OR Thermostatic Control Valves
Standards
Water Contamination
WaterMark AS/NZS 4020 & AS/NZS 3498
Electrical Safety
AS/NZS 60335.2.35 & IEC 60335.2.35
IP Rating
IP44
EMC
CE/C-Tick
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
Reference
Reference
Flow Rates and Output Water Temperature
Dimensions
Flow rate in (ltr/min), related to output water temperature (°C) and optimised electrical energy usage (kW).
The incoming water temperature will vary during Summer and Winter. The following tables show the hot water
output temperatures attainable at various flow rates, for each of the CFEWH SERIES 1 Models available.
OUTPUT WATER TEMPERATURE 40°C
OUTPUT WATER TEMPERATURE 50°C
(Note: 60°C Setting to be used with tempering valves where required.)
Litres/min
9.6kW
TANDEM 19.2kW
INCOMING WATER
TEMPERATURE
9.6kW
TANDEM 19.2kW
6°C
4.1
8.1
6°C
3.1
6.3
10°C
4.6
9.2
10°C
3.4
6.9
15°C
5.5
11.0
15°C
3.9
7.9
20°C
6.9
13.8
20°C
4.6
9.2
395mm
INCOMING WATER
TEMPERATURE
295mm
Litres/min
Outside Cover
Maximum Rated Operating Water Pressure
The maximum operating water pressure is 10 MPa/10 bar/150 PSI.
Water Resistivity
21
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.
Outside Cover Extension
100mm
20
The resistivity of the potable water must 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.
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.
210.5mm
125mm
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.
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
Reference
Reference
Diagnositics and Error Descriptions
Manual Intervention
Error Description (Cause)
22
Error Code
Error Type
LED Display
Not powered
N/A
No error
No colour
Normal operation standby
00
No error
Slow Flashing GREEN
Normal operation – heating
01
No error
Fast Flashing GREEN
Water conductivity too low
No error
ORANGE
In Priming Mode
No error
ORANGE
Operating temperature too low
A4
Blocking / Resolving
Flashing RED
Operating temperature too high
A5
Blocking / Resolving
Flashing RED
Outlet water temperature 5°C above set point
A6
Blocking / Resolving
Flashing RED
Inlet cold water input sensor open circuit
A7
Blocking / Resolving
Flashing RED
Inlet cold water input sensor short circuit
A8
Blocking / Resolving
Flashing RED
Outlet water temperature sensor open circuit
A9
Blocking / Resolving
Flashing RED
Outlet water temperature sensor short circuit
AA
Blocking / Resolving
Flashing RED
High temperature limit exceeded >70°C
FA
Mechanical Lockout
RED
Over Current Condition
FB
Mechanical Lockout
RED
Earth Leakage Detection
FC
Mechanical Lockout
RED
CPU Watch Dog Timer Error
FD
Mechanical Lockout
RED
Temperature Controller Error
(A6 Error >5 times in one operation)
FE
Mechanical Lockout
RED
Unknown Failure
FF
Mechanical Lockout
RED
Water Conductivity too high
FB
Mechanical Lockout
RED
IMPORTANT – The Manual Intervention procedure must only be performed by a trained professional.
The problem may be resolved by resetting the unit by pressing the PCBA RESET Button (21).
This can be done by following these steps:
1. Remove the Exterior Cover and unplug the connecting cable (19) from the PCB.
The three LED indicators on the PCB will be illuminated when the unit is in standby, running or in error mode.
RED
ORANGE
GREEN
2.Depress the PCBA RESET Button (21) mounted on the PCBA (8).
19
LED Indicator/Display PCB Plug and Cable
23
Mechanical Lockout Error
The mechanical lockout condition is indicated by the LED illuminating RED continuously.
The unit incorporates an error detection process that may result in a mechanical lockout condition. This
indicates a serious malfunction that cannot be automatically resolved and will require manual intervention.
Normal operation cannot be resumed by switching the appliance OFF and ON. Manual Intervention
Procedure is required.
Error Code Display
(Only viewable on the CFEWH SERIES 1 PREMIUM Model)
If the unit experiences some type of malfunction, the
LED indicator will also display an error code. You will see
Er appear in the TEMP SETTING window and then an
alpha-numerical code in the WATER FLOW RATE window.
For example – this shows error code A6:
21
PCBA Reset
Button
If the error has been successfully RESET, the GREEN LED on the PCB will start to flash slowly, indicating
the unit is now in standby mode.
IMPORTANT
• If the RED LED remains either flashing or illuminated, an error condition is still present.
There are NO user serviceable parts inside the housing, so no further action can be taken.
• Call for a qualified Service Technician/Installer to attend.
3. Reconnect the Connecting Cable (19) and replace the Exterior Cover.
CFEWH SERIES 1-10
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INSTALLAtion Manual ©2013
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MicroHeat Technologies Pty Ltd
Reference
Reference
Maintenance
Warranty
The unit is designed to provide long and reliable service. Actual life expectancy will vary with water quality and
use. The unit itself does not require any regular maintenance.
WARRANTY FOR MICROHEAT TECHNOLOGIES PTY LTD CONTINUOUS FLOW ELECTRIC HOT WATER
HEATER (CFEWH) SERIES.
The CFEWH SERIES 1 has a projected Mean Time Between Failure (MTBF) of 925 hours/17,500 cycles.
For the MicroHeat Technologies Pty Ltd Continuous Flow Electric Water Heater SERIES (“CFEWH”), MicroHeat will repair or, if necessary,
at its sole discretion, replace the CFEWH, which falls within the Warranty Periods and Territory specified below, subject to the warranty
conditions and the warranty exclusions.
However, to ensure consistent water flow, it is recommended to periodically remove scale and dirt that may
build up in the Inlet Filter (13), the faucet or in the shower head.
Warranty Period within Australia, New Zealand and Papua New Guinea is 3 years from the date of purchase by the consumer as defined
by the Competition and Consumer Act 2010 (Cth).
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or
refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the
goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
IMPORTANT
It is the responsibility of the consumer to provide proof of purchase within the Territory.
Other than the Inlet Filter (13), the unit does not contain any user-serviceable parts. In case of
malfunction, a trained service agent, licensed plumber or electrician is required.
WARRANTY CONDITIONS
WARRANTY EXCLUSIONS
1. This warranty is applicable only for CFEWH appliances.
Repair and replacement work will be carried out as set out in
the MicroHeat warranty. However, the following exclusions may
cause the MicroHeat warranty to become void and may incur a
service charge and/or cost of parts:
2. The CFEWH must be installed in accordance with the
MicroHeat CFEWH Installation Instructions, to be supplied with
the CFEWH water heater, and in accordance with all relevant
statutory and local requirements of the Country or State in which
the CFEWH is installed.
3. Where a failed component or CFEWH is replaced under
warranty, the balance of the original warranty period will remain
effective. The replaced part or CFEWH does not carry a new
warranty.
24
4. Where a failed component or CFEWH is replaced or repaired
under warranty, MicroHeat will incur all associated costs.
However, where the CFEWH is installed outside the boundaries
of a metropolitan area to be defined by MicroHeat or further than
35 km from an Accredited Service Agent, the cost of transport,
insurance and travelling costs between the nearest MicroHeat
Accredited Service Agent’s premises and the installed site shall
be the owner’s responsibility.
5. Where the CFEWH is installed in a position that does not allow
safe, ready access, the cost of accessing the site safely, including
the cost of additional materials handling and/or safety equipment,
shall be the owner’s responsibility.
6. The warranty only applies to the CFEWH and therefore does
not cover any plumbing or electrical parts supplied by others and
not an integral part of the CFEWH, e.g. pressure limiting valve;
tempering valves; isolation valves; shut off valves; electrical
switches; electrical cabling; pumps or fuse.
7. The benefits of this warranty are in addition to other rights and
remedies of the consumer under laws in relation to the goods and
services to which the warranty relates.
8. The CFEWH 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 consumer
shall contact:
MicroHeat Technologies Pty Ltd
Unit 6, 38-42 Sabre Drive
PORT MELBOURNE VIC 3207
AUSTRALIA
Phone: (03) 9681 7088
2. The process will then follow the MicroHeat Product Warranty
Flow Chart to assess whether the product is under warranty.
CFEWH SERIES 1-10
|
1. Accidental damage to the CFEWH or any component, including:
Acts of God; failure due to misuse, abuse, fire or flood damage;
incorrect installation; damage as the result of transportation,
removal or storage; attempts to repair the CFEWH other than by
a MicroHeat Accredited Service Agent, the MicroHeat Service
Department or a repairer not approved by MicroHeat.
2. Where it is found there is nothing wrong with the CFEWH
water heater; where the complaint is related to circumstances
where there is no flow of hot water due to faulty plumbing;
where water leaks are related to plumbing and not the CFEWH
or CFEWH components; where there is a failure of electricity or
water supplies; where the supply of electricity or water does not
comply with relevant standards, codes or acts, MicroHeat may
then charge the consumer a nominal service charge if inspection
reveals no fault with the CFEWH unit or its installation.
3. Where the CFEWH or CFEWH component has failed directly
or indirectly as a result of excessive water pressure in excess
of 10bar; incorrect pressure limiting valves; incorrect tempering
valve settings; temperature input in excess of 85ºC and/or
excessive thermal input; blocked outlet; corrosive atmosphere;
foreign matter in the water supply; or ice formation in the pipe
work to or from the CFEWH water heater.
4. Where the CFEWH is located in a position that does not
comply with the MicroHeat CFEWH Installation Instructions
or relevant statutory requirements, causing the need for major
dismantling or removal of cupboards, doors or walls, or use of
special equipment to bring the CFEWH to a serviceable position.
5. Repair and/or replacement of the CFEWH due to the effects
of either corrosive water or water with a high chloride or low pH
level caused by unnatural circumstances or when the CFEWH has
been connected to a water supply with water conductivity levels
that are outside the range of water conductivity outlined in the
Installation Instruction Manual.
Subject to any rights you have under Australian Consumer Law
or other statutory provisions to the contrary, this warranty
excludes any and all claims for damage to furniture, carpets,
walls, foundations or any other consequential loss either directly
or indirectly due to leakage from the water heater, or due to
leakage from fittings and/or pipe work of metal, plastic or other
materials caused by water temperature, workmanship or other
modes of failure.
INSTALLAtion Manual ©2013
|
MicroHeat Technologies Pty Ltd
25
Notes
26
Contact Details
27
For technical support during or after installation
phone 03 9681 7088
MicroHeat Technologies Pty Ltd
Unit 6, 38-42 Sabre Drive
PORT MELBOURNE VIC 3207
AUSTRALIA
www.microheat.com.au
AS/NZS 3498
Lic: WMKA22136
Standards Australia
Patent
Cooperation
Treaty (PCT)
Patent
Protected.
IEC 60335.2.35
T120312_S
AS/NZS 60335.2.35
A/13670EA
E1109-0066-1
C-Tick N29465
Trademarks
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Hot water just got smarter
DISTRIBUTED BY:
ISSUE 2 April 2013
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