Akw iTherm 30306 User manual

iTherm Electric Shower
INSTRUCTIONS
Please read all instructions before installation and leave this document
with the end user for future reference as it contains important warranty information
8.5 kW
30306
9.5 kW
30307

General: 01905 823 298 | www.akw-ltd.co.uk2
2
PRODUCT FEATURES
Product Features
Eco Setting - Optionally select 6 litres per minute maximum flow
Automatic Shut Down - The shower automatically reverts to standby - preset
time can be set at 5, 10, 20 or 30 minutes
Phased Shut Down - Flushes the shower with cold water to avoid the possibility
of scalding if the shower is restarted within a short period of time
Flexible Installation
6 water and cable entry points





Technical Support: 01905 560 219 3Order: 01905 823 299 |orders.akw-ltd.co.uk
3
CONTENTS
Contents
User4-9
Safety Information4
Operating Instructio5
Shower Settings6-7
Troubleshooting8
Filter Cleaning...................................................................................................................... 
Installer10-17
Main Components10
Specifications11
Installation Requirements12
13
14
15
16
17
Plumbing18-19
Electrical20-21
Connecting Waste Pump ................................................................................................ 22
Commissioning 23-26
Temperature & Mode Settings 23
24
Commissioning ................................................................................................................. 25
In-Service Tests26

General: 01905 823 298 | www.akw-ltd.co.uk4
4
SAFETY INFORMATION
Safety Information
Failure to install this AKW product in accordance with supplied instructions or
the making of unauthorised modications will invalidate any warranty and may
affect product safety.

This information is provided on the condition that the person receiving it shall

None of the foregoing affects your statutory rights.
This appliance can be used by any persons with reduced physical, sensory or

have been given supervision or instruction concerning the use of the appliance
in a safe way and understand the hazards involved. Children shall not play with
the appliance. Cleaning and user maintenance shall not be made by children
without supervision.

appliance has been susceptible to freezing conditions.

Cleaning Recommendations
Always isolate power supply before cleaning.
Clean and descale the shower head regularly.
The shower unit and surrounding areas should be cleaned periodically to remove
any accumulation of dirt or other waste materials, using domestic bathroom and

Do not use abrasive pads or cloths. Do not use strong or concentrated
acidic, alkaline or other cleaning materials as these may damage or discolour
the product.
After cleaning always wash down with water then wipe thoroughly with a damp
soft cloth to remove any cleaning material residue.

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5
OPERATING INSTRUCTIONS
Operating Instructions
Temperature
Increase
Temperature
Readout
Flow
Increase
Power
Light
Ring
Power On / Off
Temperature
Decrease
Flow
Decrease
Starting the Shower
Switch on the mains power at the isolating switch.

in standby mode.
To switch on, press the power button. The power light ring will be brightly lit.

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6

Shower Settings

then released, the shower enters settings mode (beep and bright power light ring).
Select the mode required by adjusting the temperature control.
If the temperature control is not adjusted within 5 seconds of releasing the
power button then the shower will revert to standby state.
If the temperature control is adjusted within 5 seconds, the LEDs will illuminate

The LEDs will remain lit for 5 seconds after last adjustment.
If while the LEDs are illuminated the power button is pressed and released, a
corresponding mode will be entered as detailed below (beep/flash to confirm).

Cold Flush: this setting will be selected when only LED #1 is lit.
Volume Setting: this setting will be selected when LEDs #1 & 2 are lit.
Eco Setting: this setting will be selected when LEDs #1, 2, 3, 4 & 5 are lit.

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7

Shower Settings
Cold Flush
Volume Setting
Eco Setting
Press / release power button: cold flush starts immediately.
Press / release power button: cold flush cancelled: revert to standby state.
Cold flush will continue for 60 seconds if not cancelled as above.
Press / release power button: volume set mode entered.
Select volume setting by adjusting temperature control: 1 led = no sound / 2 led
= low volume / 3 led = high volume.
If temperature control is not adjusted within 5 seconds of releasing power
button: revert to standby state.
Press / release power button: volume setting stored: revert to standby state.
Press / release power button: Eco setting mode is entered.
Select Eco On/Off by adjusting temperature control: 1 led = Eco Off / 2 led = Eco On
Eco On = flow limited to 6 lpm.
If temperature control is not adjusted within 5 seconds of releasing power button:
revert to standby state.
Press / release power button: Eco setting stored: revert to standby state.

General: 01905 823 298 | www.akw-ltd.co.uk8
8

Troubleshooting
Read and understand the user guide before commencing troubleshooting.
Fault Indication Symptoms
Low pressure
POWER BUTTON led : dim
TEMP leds : #1 only
FLOW leds : none
Digital Display: LP
Flow rate less than ~1.0 lpm
Possible causes include low water
pressure, starvation of supply
or blockage in the inlet lter
or outlet hose/handset.
Inlet
thermistor
POWER BUTTON led : dim
TEMP leds : #1+2
FLOW leds : none
Faulty inlet thermistor.
Shower continues to run, but
heating elements are disabled.
Outlet
thermistor
POWER BUTTON led : dim
TEMP leds : #1+2+3
FLOW leds : none
Faulty outlet thermistor.
Shower continues to run, but with
heating elements disabled.
Instantaneous
Overtemperature
POWER BUTTON led : Dim
TEMP leds : #1+2+3+4+5
FLOW leds : None
The shower continues to operate, but
the heating element is turned off and the
water outlet is turned off.
An error prompt is displayed
when the shower is running.
Automatic reset when overtemperature
conditions are cleared (natural cooling or
rinsing cold water through shower heater).
Uncontrolled
Overtemperature
POWER BUTTON led : dim
TEMP leds : #all
FLOW leds : none
Outlet temperature has
risen uncontrollably.
Possible causes include component
failure or sudden starvation
of water supply.

In the event that the shower fails to respond to any push-button or exhibits
unusual performance characteristics during operation, turn off the electrical





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9
FILTER CLEANING
Filter Cleaning
Ensure that the electrical supply is switched off at the mains.
Ensure that the water supply is turned off.
Using a flat head screwdriver, unscrew the filter.
Rinse the filter in water and once this is clean then return to the inlet housing.
Locate the filter. Unscrew the filter.
Cleaning the Filter
This should be done only if you suspect reduced flow rate or water hardness build up.

General: 01905 823 298 | www.akw-ltd.co.uk10
10
MAIN COMPONENTS
Main Components

Cut-out Entry
Shower Hose
Outlet



Fixing
Hole
Top Pipe Inlet and
Cable Entry Cover

Cable Entry Cover
Cover
Plates

Cut-out Entry
Inlet Filter

Fixing Holes
3x Screws
3x M4 Screws


Shower Front Cover Fitting Plate

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11
SPECIFICATIONS

(H)


(D)
(H2)
Supply Source Mains pressure cold water only
   
 
   
Maximum Inlet Temperature 28°C
Minimum Inlet Temperature 3°C
    
    
   
   
Residual Current Device (RCD) 30 mA (must be fitted)
Supply Cable Refer to current wiring regulations
      
cable size. No larger than 10 mm2
Isolation Switch (e.g. Pull Cord) 50 Amp Double Pole with 3 mm
contact separation.
Height (H) 388 mm
       
Depth (D) 100 mm
Footprint Height (H2) 365 mm
     
    
   
PHYSICAL ELECTRICITY SUPPLY 
ACCREDITATIONS & CERTIFICATIONS

General: 01905 823 298 | www.akw-ltd.co.uk12
12
INSTALLATION REQUIREMENTS
Installation Requirements
Installation Requirements and positioning
The shower must be connected only to the mains cold water supply.
DO
• Mount on a finished flat, waterproof surface.
• Position the shower unit vertically.
• Ensure that the shower unit is positioned over a bath, shower tray, or wet floor.
• Direct the shower head away from the shower unit. During normal use the shower head
must not spray directly on to the shower unit.
DON’T
• to any parts 
specifically state for use with the shower, as it acts as a vent.
• Position the shower where it will be subjected to freezing conditions.
• Tile up to the shower unit.
• Seal the shower to the wall with silicone or other sealant.
Before you start work:


from loose debris or dust.
This product is not suitable for mounting into steam rooms or steam cubicles.
Note - If it is intended to operate the shower in areas of hard water (above 200 ppm temporary


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13

Disassembly
Ensure that the electrical supply is switched off at the mains.
Ensure that the water supply is turned off.
Unplug the ribbon cable from
the circuit board and place the
front cover out of the way.
Unscrew the four fixing screws,
and slide out the bottom cover plates.
Remove the 2 screws and carefully
lift off the bottom of the front cover.
Release from the top retaining clips.
Slide out the relevant pipe
& cable entry covers.

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14


It is essential to remove any debris and/or brick dust that could otherwise damage
the unit. Do not make any alternative – as this may compromise safety and will
invalidate the warranty. Check for hidden cables and water pipes.
Use the fitting template provided.
CAUTION
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
Use Spirit Level Here
113 mm
317.7 mm
Use Spirit Level Here
Fitting Template
Use Spirit Level Here
113 mm
317.7 mm
Use Spirit Level Here
Fitting Template

prevent slipping and tile splintering. Always
use a tile drill bit when drilling tiles.
Ensure that the template is level and
temporarily hold in position with tape.


Remove the fitting template from the wall

Insert wall plugs and screw the top
screw to the wall. Note: the bottom
screws should be fitted only
during final installation.

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15



no cables or water supplies running
within that area of the wall.
Drill, insert wall plugs and
screw to wall.

a minimum of 3 out of the 28 available
fixing points on the wall.

Fixing Hole


plate using the provided 3x M4 machine screws.
M4 Screws
with Spring

Note: the 3 illustrated
holes match electric
showers within the
stock code range
29010 to 29092

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16


Fasten the screws holding
the bottom covers.
Once the cable and pipe connections have been made, reassemble the bottom cover plates.
Slide the entry covers in. Slide the bottom cover plates in.

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17

Reassembly - Front Cover
Ensure that all connectors are correctly inserted before the cover is refitted.

Use only the supplied screws to secure the front cover. Failure to do so may cause internal
damage to the appliance.
Carefully connect the ribbon cable.
Place top of the cover against the shower

correct position and press the bottom
of the cover to clip. Screw in place.
TX
P2
P1
RX
OU
12U
R57
C20 R72
R47
R52
C8
101
EOT
101

General: 01905 823 298 | www.akw-ltd.co.uk18
18

Plumbing
COLD WATER FEED ONLY - Never fit the appliance to the hot water supply.
There are 6 water inlet points for easy installation.




DO NOT fit any form of outlet flow control to the water heater.
Note: An isolating stop valve must be installed on the cold water feed before connecting
to the shower. The isolation valve (not supplied) should be fitted as close as is practicable
to the water supply inlet of the shower heater whilst being accessible for maintenance and
servicing purposes.
Remove retaining screw and rotate inlet valve to left or right as desired.
OR

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19

Plumbing


Note
 Top Entry
Left or right side top inlet.Left or right side bottom inlet.
Rear Entry
Left or right side rear inlet.

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20
ELECTRICAL
Electrical
Caution - Danger of Death 230 V AC
Lethal Voltage present on the AC supply.
Shower unit 50 A Double pole isolating
switch (e.g. Pull cord)
Max 10 mm2
30 mA RCD
(May be part of consumer unit)
Consumer unit (80 A
minimum isolating
switch rating)
For adequate circuit protection DO NOT use a rewireable fuse. Instead use a suitably rated

A 30 mA residual current device (RCD) must be installed.
A 50 amp double pole isolating switch with a minimum contact gap of 3 mm in both poles
must be incorporated in the circuit.
The isolating switch must have a mechanical indicator showing when the switch is in the OFF
position, and the wiring must be directly connected to the switch.
The isolating switch must be accessible and clearly identifiable, although out of reach of a
person using a fixed bath or shower. The cord of a cord-operated switch should be placed so
that it is not possible to touch the switch body whilst standing in a bath or shower cubicle.

be protected by a 30 mA RCD. Consult the wiring regulations.
It is recommended to use the shortest cable route possible from the consumer unit to the shower.
WARNING - THIS APPLIANCE MUST BE EARTHED
ALL COMPONENTS MUST BE RATED AND INSTALLED IN ACCORDANCE WITH WIRING REGULATIONS.