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.

Technical Support: 01905 560 219 5Order: 01905 823 299 |orders.akw-ltd.co.uk
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.

General: 01905 823 298 | www.akw-ltd.co.uk6
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.

Technical Support: 01905 560 219 7Order: 01905 823 299 |orders.akw-ltd.co.uk
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





Technical Support: 01905 560 219 9Order: 01905 823 299 |orders.akw-ltd.co.uk
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