Akw M17 DigiPump Installation guide

Read ALL instructions carefully BEFORE installation and leave with the end user for future reference
Read ALL instructions carefully BEFORE installation and leave with the end user for future reference
AKW M17 DIGIPUMP
Installation and User Care Instructions
UK

Contents Page
Introduction-Declaration of Conformity
Box Contents -Plumbing Specification
Important Safety and Electrical Information
Product Specifications
Fixing pump to surface
Plumbing connections
Fitting Flow Sensor(s)
Electrical Installation
Pump Set Up
Commissioning
Care and Maintenance
Problem Solving
Warranty
We declare that the AKW M17 DigiPump shower waste water pump conforms to the
requirements of the EMC Directive 2014/30/EU, LVD Directive 2014/35/EU and the
following harmonised European and national standards in the confirming assessment.
EN 60335-1
EN 60335-2-41
EN 62233
EN 61000-3-2
EN 61000-3-3
EN 55014-1
EN 55014-2
AKW Ltd.
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Declaration of ConformityDeclaration of Conformity
M-SERIES DIGIPUMPSM-SERIES DIGIPUMPS
The M series Digipump and sensor kits has been designed for the pumping of shower waste
water. The Digipump control unit uses flow sensors to measure the flow rate of water into the
shower. The control unit uses the signals sent from the flow sensors to adjust the pump speed
automatically to match the flow of water from the shower. When the shower is turned off, the
flow sensors send a signal to the control unit and after a pre-set time delay the pump turns off.
After a further set time the pump will automatically switch on for a short period of time at a
reduced pumping speed, removing any run off water pooled in the shower area and gully. The
pump has the ability to run dry without causing damage. Non-return valves in the pump head
prevent smells from entering the bathroom area from the waste pipe.

Before you start...Before you start...
3
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
Box contents
1x
3x
3x
1x
2x 22mm
2x 22mm
1x
2x
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
Plumbing SpecificationPlumbing Specification
This product is rated at IP45 and suitable to be installed in Zone 1, 2 or Zone 3 of a
shower room only if these instructions are fully complied with.
The unit must be located away from the direct line of water jets.
Note: Zone 1 lies above zone 0 and upto 2250mm (88in) vertically above a shower tray
or wet floor area.
The perimeter of zone 1 of a wet floor is within a 1.2 metres (47in) radius of the
shower head position. Zone 2 is the area 600mm beyond Zone 1.
FOR GUIDANCE ONLY- PLEASE REFER TO BS7671 FOR FURTHER DETAILS
Confirm you have all the correct parts and tool required.

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CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
Important Safety & Electrical InformationImportant Safety & Electrical Information
THIS CLASS II APPLIANCE DOES NOT REQUIRE AN EARTH
CAUTION: 230V AC
Lethal Voltage present on the AC supply
Ensure mains power supply is switched OFF before starting wiring
DO NOT take risks with plumbing or electrical installation. This product
must be installed and serviced by a competent person in accordance with
the current edition of the Wiring Regulations (BS7671), local by-laws and
the current building regulations.
This product must be installed, used and maintained in good working
order in accordance with these instructions and recommendations.
If the supply cord is damaged, it MUST be replaced in order to avoid
hazard.
The 230V AC power supply to this unit must be provided via a two-pole isolator switch and a
dedicated circuit with a 30mA RCD device installed in accordance with the latest revision of
the Wiring Regulations BS7671. It must be wired into a fused, unswitched, fixed wiring
connector fitted with a 5 amp fuse.
The IP45 rating of the AKW pump product refers to the inner casing containing the electrical
control gear. The pump motor which operates at SELV is located within the outer cover.
Product SpecificationsProduct Specifications
AKW M17 DigiPump high performance shower waste water pump.
Pump Specification:
SUPPLY: 230V AC 50Hz 100W
IP45
DUTY CYCLE: 50% max 30 mins on.
Quiet in operation.
For use with electric & mixer showers.
Pump and controller enclosed in one unit.
Max flow rate: 17 Litres Per Minute (LPM).
Non-handed, selectable inlet/outlet direction.
Note: Increased Head/Lift conditions will
affect the pump’s performance.
Pump Capacity:
17 LPM MAX under head/lift
conditions.
Derate accordingly for installed
conditions.
Max Head: 1.0m (39in).
Max Lift: 0.5m (20in).
MAX COMBINED HEAD + LIFT:
1.5m (59in).

Important: For service & maintenance
purposes this product should be installed
in an accessible location.
The pump unit must be located on a
vertical surface with the inlet/outlet
connections at the bottom of the unit
in horizontal alignment, with the AKW
case logo at the top.
Pipe connections must be easily
accessible and a clearance of 100mm
around the base and sides is
recommended.
Fitting Pump SpacersFitting Pump Spacers
5
100mm (4in)
minimum clearance all round
Flow sensor
cables
Power cable
Pump Spacers
Remove the adhesive tab at
this hole only.
Fixing pump to surfaceFixing pump to surface
Use the Pump Spacers to prevent the cables being trapped.
Separate the spacers, remove the adhesive backing and snap lock into position

Remove front cover with a
screwdriver.
Disconnect pump motor cable.
Remove pump assembly from
the back plate to access the
fixing holes.
Fit to a finished surface.
Using the back plate as a
template mark the fixing
holes. Drill and plug the wall
taking care there are no
hidden cables or pipes.
Use all the screw fixing
positions.
Mount the pump to the
finished surface using all
the wall fixings.
Use the Pump Spacers to
prevent the cables being
trapped.
See pump spacers fitting.
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2
Fixing pump to surfaceFixing pump to surface
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4
6

Refit the front cover.
Fit the non-return valves as
shown. Fit the pump connectors
to the pump.
Screw both connectors into
place. No thread sealant
needed, firmly hand tighten
only.
Check that you have not
overtightened and distorted
the non-return valves before
connecting the pipework.
Fixing pump to surfaceFixing pump to surface
Check that the flow is in the required direction, reverse as required. Loosen the
pump head housing, rotate and fully tighten home.
The pipework to this high performance pump must be clamped down effectively,
AKW advise and recommend you clamp pipework either side of joints, junctions
or connections and at a maximum of 500mm between other supports.
Rotate to direction of flow
Loosen Fully tighten
Flow directionFlow direction
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Remove shipping tapes from pump
inlet and outlet.
Refit the pump to the back plate.
Reconnect pump motor cable.
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Flow direction
non-return valve non-return valve
22mm
Connector
22mm
Connector
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MIN
HEAD
1.0m Max
0.5m Max
0.5m Max
LIFT
Shower Head
Waste
outlet pipe
NOT PREFERRED PREFERRED (NO ELBOWS)
Shower Tray/Waste
Important: Pipe connections must be easily accessed and pipework must be secured to prevent vibration and noise.
NEVER fit pipe inserts. ALWAYS fit the supplied
collet locking clips.
MINIMISE PIPEWORK LENGTH WHEREVER POSSIBLE
OR
100mm (4in)
MIN GAPS
Use the supplied Pipe Adaptors
to connect to waste outlet pipe.
Plumbing ConnectionsPlumbing Connections
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For best performance locate within 1m (39in) of shower and minimise
the number of lifts, bends and the length of all pipes connecting the
pump to the waste outlet pipe.
Note: Increased Head/Lift conditions will affect the pump’s performance.
See product specifications.

Depending on the installation install 1 or 2 filters and sensors to the shower water feed. Install the filter
(Y-Pattern filter) in the correct flow orientation to the shower water supply line and then fit the flow sensor
between the filter and the shower.
Confirm shower water supply pipework is flushed before connecting to the shower sensor via the filter.
Electric showers have one water supply line, cold water. Fit one Filter and Flow Sensor to this line.
Mixer showers have two supply lines, hot and cold water. Fit one Filter and Flow Sensor to each supply line.
Double check direction of the flow arrow moulded on the sensor casing is in the correct orientation with
the flow of water. Allow enough distance so that the sensors are easily accessible. Ensure all cable
connections are accessible and in a dry location. Fit sensor using an approved liquid based thread sealant
suitable for nylon threads. Connect the sensor tail cable from the flow sensor to the pump sensor cable
(see page 11). Do not tile over the flow sensors and filters and ensure they are accessible for service
and maintenance purposes.
Fitting Flow Sensor(s)Fitting Flow Sensor(s)
Flow
Direction
Vertical Water Feed InstallationVertical Water Feed Installation
Flow
Direction
Flow Sensor check
flow direction
Shower
Flow Direction
Filter in wrong orientation
Sensor
Tail
Pump Sensor
Cable
Filter in correct orientation
Shower
Flow
Sensor
Filter
Sensor
Tail Pump Sensor Cable
Flow Direction
Correct orientation Wrong orientation
Check flow sensor direction.
Flow
Direction
Horizontal Water Feed InstallationHorizontal Water Feed Installation
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Ensure Mains Power Supply is Switched OFF before starting wiring.
DO NOT take risks with Plumbing or Electrical Installation.
Only a competent trades person should attempt this installation.
This product is rated at IP45 and may be installed in Zone 1, 2 and 3 of a shower room only if the following
conditions are fully complied with.
The pump unit must be located on a vertical surface with the inlet/outlet connections at the bottom of the
unit in horizontal alignment, with the AKW case logo uppermost.
The unit must be located away from the direct line of water jets whenever possible.
Cable to and from the pump must be run directly out of zone 1 by the shortest route below the unit or
directly behind into the vertical surface. All such routes must be sealed to prevent water ingress.
Cables routed from above, down into the device, act as a drip path and should not be used.
Cables must be protected against mechanical damage and sealed against water ingress.
The case must not be cut except for the thin rear shroud. Do not pierce casing. Use the supplied Pump Spacers
kit to route the cables behind the unit.
The clearance behind the unit and separation from the wall must be minimal and the gap must not be sealed.
All casing cable glands must be visually checked for presence of the elastomeric centre sealing grommet and
tightness checked and confirmed before installing against the wall.
No cable joints may be made in zone 1.
The unit inner cover must not be disturbed and the outer cover must be correctly fitted.
The 230V AC power supply to this unit must be provided via a two-pole isolator switch and a dedicated
circuit with a 30mA RCD device installed in accordance with the latest revision of the Wiring Regulations BS7671.
It must be wired into a fused, unswitched, fixed wiring connector fitted with a 5 amp fuse.
The IP45 rating of the AKW pump product refers to the inner casing containing the electrical control gear.
The pump motor which operates at SELV 32 DC (maximum) is located within the outer cover.
Electrical InstallationElectrical Installation
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Mains Supply
Consumer unit
containing 30mA RCD
13amp rated double
pole isolating switch
Sensor cable(s) Flow Sensor(s)
Filter
Shower
Isolating valve(s)
DigiPump

Ensure the pump spacers are used to prevent the cables from being trapped.
Red
Brown
Flow Sensor
Wire
+
S
Black
White
Red
Black
Pump Wire
Connector Block
All cable connections must be in a dry location.
Connecting the Flow Sensor(s) to the DigipumpConnecting the Flow Sensor(s) to the Digipump
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Ensure sensor and filter are in an easily accessible location.
Ensure all cables and plumbing are behind water resistant surfaces.
The pump has two flow sensor cables, for mixer showers with two water feeds, both must be
connected to the separate flow sensors. Fit one flow sensor to cold water feed pipe and one to
the hot water feed pipe.
For electric showers only connect one sensor, the other sensor wire must be terminated in a
connector block and insulated using electrical insulation tape at a dry location.
Failure to do this may damage the pump.
Note: To connect the pump directly to a compatible electric shower please see the instructions
supplied with your electric shower.

Calibration
The AKW DigiPump allows for precise pump control of the shower waste water by calculating the amount of water
the shower is producing. It may be necessary to calibrate the pump once installation is complete (the pump may
be over or under pumping).
Before calibration, the correct flow sensor pulse rate must be set. See Pump Settings - Sensor type.
Run the shower at the expected normal flow rate. The pump must run at a speed which removes the same
amount of water as is flowing in.
Adjust the calibration value so the water level stays approximately the same. If the water level drops, decrease
the value on the display so the pump runs slower. If the water level rises, increase the value on the display so
the pump runs faster. When the value is set correctly, press the test button to store. The controller will then
return to its normal operating mode.
Timer Adjustment
With the pump in normal operating mode and the LED showing the run on time ...
Adjust Run on time. (the time the pump will run after the shower has stopped)
Press the RUN button: this will increase the time by 1 second, holding the button will increase the time
rapidly. Once the time reaches 99 it will roll over to 01.
Adjust Start Delay (the time before the pumps starts after the shower is operating)
Press the DELAY button: this will increase the time by 1 second, holding the button will increase the time
rapidly. Once the time reaches 99 it will roll over to 01.
Control Button Description
Top Button = RUN (Sets shower stop run-on time)
Centre Button = TEST (Calibration)
Bottom Button = DELAY (Sets shower start delay to run)
Pump Set UpPump Set Up
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When power is applied to the pump, the display will
briefly indicate the model and software version of
the pump (00-M11 : 01:M17 : 02:M20)
The pump will then enter standby mode.
In Standby Mode …
The ‘RUN’ led will be lit, indicating mains voltage
present.
The display will indicate the ‘run-on timer’ setting
in seconds (factory default 20).
Setup
===================================
SENSOR TYPE (range 00 to 03) default 02
From standby …
Press and hold the TEST button until the RUN led
flashes
00 : Relay
01 : 600 pulses per litre
02 : 1000 pulses per litre (default)
03 : 2200 pulses per litre
RUN button
Short press : increase (single)
Long press : increase (repeating)
DELAY Button
Short press : decrease (single)
Long press : decrease (repeating
Press the TEST button to save settings and enter
calibration mode
CALIBRATION (range 00 to 99) default 50
RUN button
Short press : increase (single)
Long press : increase (repeating)
DELAY Button
Short press : decrease (single)
Long press : decrease (repeating)
Press the TEST button to save settings and exit
calibration.
===================================
START DELAY (range 01 to 99) default 05 seconds
From standby …
DELAY button
Short press : value single increment
Long press : value repeating increment
Press the RUN button to save settings and enter
standby mode.
===================================
RUN-ON TIME (range 01 to 99) default 20 seconds
From standby …
RUN button
Short press : value single increment
Long press : value repeating increment
Pump is in standby mode.
===================================
TEST SEQUENCE
From standby …
Press the ‘TEST’ button
The ‘DELAY’ led will start flashing
The display will indicate the ‘start-delay timer’
setting in seconds (factory default 05).
The display will count down to zero
The pump will start
The display will indicate the time left to run in
seconds
When the display reaches zero the pump will revert
to standby mode.
This test can be carried out with or without water
present and also the sensor fitted or not.
Pump SettingsPump Settings

As a general precaution and check before installation, always ensure the supply pipework
to the shower has been fully purged with at least 20 litres (2 buckets) of water through it
before the flow sensor is installed. Any building debris in the water supply will adversely
affect the sensor function and may also damage the shower heater/mixer.
Install pump according to these instructions. Failure to do so may void warranty.
Confirm all push-fit pipes are fully inserted 20mm into fittings.
Brush out all dust, grit and debris
from shower tray
Thoroughly clean out waste
Confirm shower water supply pipework is flushed
before connecting to the shower sensor via the filter
Turn on power to Pump
Turn shower on Low Flow and confirm pump
operates after Start Delay (default 5 secs.)
Run for 2-3 mins
Set shower to Maximum Flow
Follow the Calibration setting, adjust pump speed on
controller to match maximum shower flow
Adjust RUN-ON and repeat until tray is cleared and
pump stops with minimum RUN-ON
Switch shower OFF.
Pump will RUN-ON
If you experience problems see
Problem Solving section
Commissioning ChecksCommissioning Checks
14

Please refer to pump instructions to ensure the pump is installed correctly.
PUMP WILL NOT START
Ensure flow sensor is connected to pump controller and power is on to pump controller.
Ensure that all pipe work is fully flushed before the flow sensor is installed, and
the in-line filter is in place.
Check flow sensor is installed in the correct orientation
(Flow direction arrow moulded on the casing).
Most flow sensor problems are due to debris being caught inside the flow sensor.
Remove sensor and check for debris.
If required reverse flush with water.
The integrity of the case and the RCD device operation should be checked quarterly as
part of a routine safety and maintenance activity on the installation.
If the case shows any mechanical damage the unit must be isolated electrically and the
entire unit replaced.
Pipework connections must be made to the unit with sufficient clearance (100mm
minimum separation to any pipe bend or fitting adjacent to the inlet/outlet connections) to
permit removal of the pump/head for routine maintenance and replacement.
The unit must be regularly cleaned using normal bathroom cleaning materials and rinsed
down with clean water and wiped dry with a soft cloth to remove any cleaning residue.
Do not use strong or concentrated acidic or alkaline cleaning materials as these may
discolour or otherwise damage the product. Do not use an abrasive cloth.
Care and MaintenanceCare and Maintenance
Installation ProblemsInstallation Problems
15

Check Non-Return Valves are
correctly fitted and oriented in the
inlet and outlet pipe connectors.
The pump has an overrun timer to allow it to continue to run after the
shower has been switched off. This timer is factory set to 20 seconds.
With the power supply switched on, disconnect the flow sensor. Separate
the disconnected wires. This will simulate the flow sensor turning off.
Pump should stop after the overrun time. If not, check the controller
display panel or cabling. If the pump has not stopped, disconnect power
supply and contact customer services.
Is the controller working, remove and check the flow sensor, flush it
through with water or replace it as necessary.
When increasing the pump speed, if the pump still performs low or no
suction, take off the pump head by removing the clamp ring. Examine
the inlet and outlet flap valves for traces of hard debris such as grit.
If so, wash out all debris and ensure the non-return valves are seated correctly.
If problem persists, check all connections for air leaks or blockage in either
the inlet or outlet pipework. Repair any leaks and clean blockages.
Confirm plastic pipe inserts
are NOT used. (see page 9
installation)
Ensure all push-fit pipe connections are fully sealed and O-rings are not
damaged or displaced.
The water pumping capacity can be adjusted by adjusting pump speed.
Adjust pump speed using the calibration setting. Please refer to pump set up.
Problem SolvingProblem Solving
PUMP WILL START BUT DOES NOT PUMP WATER
PUMP WILL NOT STOP
16

Warranty InformationWarranty Information
17
Warranty is in addition to your statutory and other legal rights. Warranty becomes
effective from date of installation. To validate and start the warranty, you must return
your completed warranty registration card and return it in the prepaid envelope or
alternatively visit the AKW website and complete the online registration form for your
product.
Refer to the product identification label on the outer case of the product or the outer
packaging for product details.
Warranty applies to all moving and serviceable parts against any
manufacturing defects, faulty materials or poor workmanship.
Warranty covers your shower waste water pump against any
defect in materials or workmanship for 5 years from the date of
installation. Within this period we will resolve defects free of charge
by repairing or replacing as we may choose.
To be free of charge work must only be undertaken by AKW or our
approved agents in the UK or the Republic of Ireland and with prior agreement.
Any action taken under this warranty does not extend the stated 5-year expiry date.
NOT COVERED BY THIS WARRANTY
Warranty excludes general wear and tear through usage and this does not apply to
inappropriate use, inappropriate cleaning, damage or defects that result from
unauthorised modifications or repairs, accidental damage, lack of maintenance including
the build up of grime, dirt, limescale, waterborne debris or from water freezing damage.
Damage caused by the use of other products with the M series Digipumps that are not
shown in this manual.
This does not cover components that are subject to general wear and tear such as
filters, seals, O-rings and washers or non-return valves.
Servicing should be carried out at regular intervals of no more than 12 months and
more frequently in hard water areas (heavy lime scale areas). In the unlikely event that
any problems are encountered with the product’s performance on installation, you must
obtain guidance/authorisation from our Technical Team Department and be able to
supply proof and date of purchase before any action is taken.
WHAT TO DO IF SOMETHING GOES WRONG
If your shower does not work correctly first follow the Problem solving chart on page
16, then contact your installer. Should this not resolve your problem, contact AKW
technical helpline.
Locate the product
identification label

NotesNotes
18

NotesNotes
19

These instructions are provided to advise the minimum standards of installation and recommends what the best practice for the installation is.
Due to the very wide variability of possible installation conditions, AKW cannot provide all circumstances for the installation. AKW cannot accept any
liability in connection with this information or its use. This information is provided on the condition that the person receiving it shall make his/her
own tests to determine the suitability for the particular purpose. Failure to install this AKW product in accordance with supplied instructions or the
making of unauthorised modifications will invalidate any warranty and may affect product safety. None of the foregoing affects your statutory rights.
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Technical Help line
01905 560219
Orderline
01905 823299
General Enquiries
01905 823298
Fax
01905 823297
Website
www.akw-ltd.co.uk
Quotes & orders email
o[email protected]
Enquiries email
s[email protected]
t[email protected]
Post
AKW, Pointon Way,
Hampton Lovett,
Droitwich Spa,
WR9 0LR
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ALWAYS read these installation
instructions carefully before installing
this product and leave with the end user
for future reference.
Lethal Voltage present on the AC supply to the
pump inner case. This unit must be connected
to a double-pole switched supply, suitably
fused and provided with a RCD protection.
This product must be installed by a qualified
and competent person and in accordance with
the current edition of the Wiring Regulations
BS7671.
This appliance must be located to comply
with the safety zones as defined in the wiring
regulations.
Isolate this unit before access for maintenance
or any other purpose. Do not immerse in
water.
There are no user serviceable parts within
case.
The cover must only be removed by an
competent person or electrician.
Caution! Always check for electric cables
and water pipework before cutting into
walls, floor boards or drilling into surfaces.
What to do if something goes wrong?
In the event that you should encounter
a problem with this product,
please contact your local installer and
if this does not resolve the issue, then
contact AKW technical team who will
provide further advice and, if necessary,
arrange for a maintenance engineer
to visit and report any issues.
As part of our quality and training
program, calls may be monitored or
recorded. None of the foregoing affects
your statutory rights.
Important Safety
Information
© 2019 AKW-LTD 07-001-165-08