Akw M DigiPumps Series User manual

Please read all instructions before installation and leave this document with the end user for future reference as
it contains important warranty information
M-Series DigiPumps
INSTALLATION AND USER MANUAL

General: 01905 823 298 | www.akw-ltd.co.uk2
2
TABLE OF CONTENTS
Table of Contents
Box Contents & Specifications .........................................................................................................................................3
Plumbing Zone......................................................................................................................................................................4
Electrical Installation............................................................................................................................................................5
Important Safety and Electrical Information...................................................................................................................6
Preparing the Pump .............................................................................................................................................................7
Fixing Pump to Surface.......................................................................................................................................................8
Setting Flow Direction .........................................................................................................................................................9
Plumbing Connections ......................................................................................................................................................10
Fitting Flow Sensor(s)........................................................................................................................................................11
Connecting the Flow Sensor(s) .......................................................................................................................................12
Pump Set Up........................................................................................................................................................................13
Pump Settings.....................................................................................................................................................................14
Commissioning Checks ....................................................................................................................................................15
Care and Maintenance ......................................................................................................................................................16
Trouble Shooting ..........................................................................................................................................................17-19
Notes...............................................................................................................................................................................20-21
Warranty...............................................................................................................................................................................22
Activate Warranty...............................................................................................................................................................23
Contact Us ...........................................................................................................................................................................24

Technical Support: 01905 560 219 3Order: 01905 823 299 |orders.akw-ltd.co.uk
3
BOX CONTENTS & SPECIFICATIONS
Box Contents & Specications
1x 3x
Stock Code: 25470
AKW M11 DigiPump
Supply: 230V AC 50Hz 100W
Ingress Protection: IP45
Duty Cycle: 50% Max 30 Mins. on
For use with electric & mixer showers.
Pump and controller enclosed in one unit.
Max flow rate: 11 Litres Per Minute (LPM).
Non-handed, selectable inlet/outlet direction.
Max Head: 1.0m (39in)
Max Lift: 0.5m (20in)
1x
3x
2x 22mm
2x 22mm
Supply: 230V AC 50Hz 100W
Ingress Protection: IP45
Duty Cycle: 50% Max 30 Mins. on
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.
Max Head: 1.0m (39in)
Max Lift: 0.5m (20in)
Supply: 230V AC 50Hz 100W
Ingress Protection: IP45
Duty Cycle: 50% Max 30 Mins. on
For use with electric & mixer showers.
Pump and controller enclosed in one unit.
Max flow rate: 20 Litres Per Minute (LPM)
Non-handed, selectable inlet/outlet direction.
Max Head: 1.0m (39in)
Max Lift: 0.5m (20in)
Conrm you have all the correct parts required. Ensure the volume of water from the shower does not exceed the
pumps drainage capacity. Note: Increased Head/Lift conditions will affect the pump’s performance.
AKW M20 DigiPump
1x
3x
2x 22mm
3x
1x 15mm
1x 15mm
1x
1x 22mm
1x 22mm
1x
2x
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
3x
1x
1x
2x
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
3x
1x
1x
2x
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
MIN
100mm MIN
*
HEAD
LIFT
*
*
*
2x 22mm
Contents
Stock Code: 25450
AKW M17 DigiPump
Stock Code: 25460

General: 01905 823 298 | www.akw-ltd.co.uk4
4
PLUMBING ZONE
Plumbing Zone
This product is rated 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.
Zone 1 lies above Zone 0 up to a minimum of 2.25m or to the height of the fixed shower head from the
finished floor level, which ever is greater.
If the shower has no tray then zone 1 extends to 1.2m around the fixed shower head.
Zone 2 is the area extending 0.6m beyond Zone 1 and up to the same height as Zone 1.
FOR GUIDANCE ONLY- PLEASE REFER TO BS7671 FOR FURTHER DETAILS

Technical Support: 01905 560 219 5Order: 01905 823 299 |orders.akw-ltd.co.uk
5
ELECTRICAL INSTALLATION
Electrical Installation
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.
Shower
L N E
Mains Supply
Consumer unit
containing 30mA RCD
Sensor cable
Flow Sensor
Filter
Isolating valve
DigiPump
Shower
L N E
Mains Supply
Consumer unit
containing 30mA RCD
5A double-pole
un-switched fused
spur
Sensor cables
Flow Sensors
Filter
Isolating valves
DigiPump
Electric Shower
Bar Mixer
5A double-pole
un-switched fused
spur

General: 01905 823 298 | www.akw-ltd.co.uk6
6
IMPORTANT SAFETY & ELECTRICAL INFORMATION
Important Safety & Electrical Information
THIS CLASS II APPLIANCE DOES NOT REQUIRE AN EARTH
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, un-switched, xed wiring connector tted 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.
CAUTION
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
CAUTION
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
CAUTION
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
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.

Technical Support: 01905 560 219 7Order: 01905 823 299 |orders.akw-ltd.co.uk
7
PREPARING THE PUMP
Preparing the Pump
Fitting Pump Spacers
Use the Pump Spacers to prevent the cables being trapped.
Separate the spacers, remove the adhesive backing and snap lock into position
Connecting Auxiliary On/Off Switch to Pump (optional)
Flow Sensor Cables
Power Cable
Auxillary On-Off Switch Cable
Stock Code: 25488
Connection for Auxillary Switch
Flow Sensor Cables
Power Cable
Auxillary On-Off Switch Cable
Stock Code: 25488
Connection for Auxillary Switch
Flow Sensor Cables
Power Cable
Auxillary On-Off Switch Cable
Stock Code: 25488
Connection for Auxillary Switch

General: 01905 823 298 | www.akw-ltd.co.uk8
8
FIXING PUMP TO SURFACE
Fixing Pump to Surface
Remove front cover with a Phillips
no.2 screwdriver.
Disconnect pump motor cable.
Remove pump assembly from the back
plate to access the fixing holes.
Fit to a finished surface. Pipe connections
must be easily accessible and a clearance
of 100mm around the base and sides is
recommended. 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 Fitting
Pump Spacers.
1
2
3
4

Technical Support: 01905 560 219 9Order: 01905 823 299 |orders.akw-ltd.co.uk
9
SETTING FLOW DIRECTION
Setting Flow Direction
Fit the non-return valves as shown. Fit the
pump connectors to the pump. Note 15mm
connector (M11) and 22mm connector
(M17 & M20) for the inlet. Screw both
connectors into place. No thread sealant
needed, firmly hand tighten only - do not use
mechanical tighteners as the product is liable
to split.
Check that you have not overtightened
and distorted the non-return valves
before connecting the pipework.
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.
Remove shipping tapes from pump inlet
and outlet. Refit the pump to the back
plate. Reconnect pump motor cable.
5
Loosen Fully tighten
Flow direction
Flow direction
Rotate to direction of flow
6
8
7
Flow direction
non-return valve non-return valve
15mm or 22mm
Connector
22mm Connector
Flow direction
non-return valve non-return valve
15mm or 22mm
Connector
22mm Connector

General: 01905 823 298 | www.akw-ltd.co.uk10
10
PLUMBING CONNECTIONS
Plumbing Connections
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.
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
MINIMISE PIPEWORK LENGTH WHEREVER POSSIBLE
OR
100mm (4in)
MIN GAPS
Use the supplied Pipe Adaptors to
connect to waste outlet pipe.
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.

Technical Support: 01905 560 219 11Order: 01905 823 299 |orders.akw-ltd.co.uk
11
FITTING FLOW SENSOR(S)
Fitting Flow Sensor(s)
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 flow 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 12). Do not tile over the flow sensors and filters and ensure they are accessible for service and
maintenance purposes. If possible, avoid installing in a loft space.
Vertical Water Feed Installation
Flow
Direction
Flow
Direction
Shower
Flow
Sensor
Filter
Sensor
Tail Pump Sensor Cable
Flow Direction
Correct orientation Wrong orientation
Check flow sensor direction.
Flow
Direction
Horizontal Water Feed Installation
Flow Sensor check
flow direction
Shower
Flow Direction
Filter in wrong orientation
Sensor Tail
Pump Sensor
Cable
Filter in correct orientation
9

General: 01905 823 298 | www.akw-ltd.co.uk12
12
CONNECTING FLOW SENSOR(S)
Connecting Flow Sensor(s)
Ensure the pump spacers are used to prevent the cables from being trapped.
Ensure sensor and filter are in an easily accessible location. If possible, avoid installing in a loft
space.
Ensure all cables and pipes are behind water resistant surfaces.
The pump has two flow sensor cables. For mixer showers with two water feeds, connect both 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.
All cable connections must be in a dry location.
+
S
AKW
Flow Sensor
Wire Red
Brown or Yellow
Black
Connector Block
Red
White
Black
Pump Wire

Technical Support: 01905 560 219 13Order: 01905 823 299 |orders.akw-ltd.co.uk
13
PUMP SET UP
Pump Set Up
Sensor Type
The DigiPump accepts two sensor types. Either flow switch (on/off) or flow sensor (proportional).
The proportional rate can be set to 600, 1000, 2200 pulses per litre.
Calibration
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.
Auxiliary Switch Type
The DigiPump accepts two switch types - latching or momentary. This function manually starts/stops
the pump. The pump will stop automatically after 30 minutes, if not stopped manually. This is an optional
extra - AKW Stock Code: 25488.
Start Delay
The time before the pump starts after the shower the shower starts. This is to allow the pipe work to prime
with water.
Run on time
The time the pump will run after the shower has stopped. This is to ensure complete clearing of water
from the shower tray.
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)

General: 01905 823 298 | www.akw-ltd.co.uk14
14
PUMP SETTINGS
Pump Settings
When power is applied to the pump, the display will briefly indicate the model and software version of the pump, the pump will
then enter standby mode.
00 M11
01 M17
02 M20
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)
Adjusting the Settings
SENSOR TYPE
From Standby, hold and release TEST button until
RUN and DELAY LED’s flash
TYPE:
00 On/off (Grounded input)
01 600 pulses per litre
02 1000 pulses per litre (Default)
03 2200 pulses per litre
Up - Press and release RUN button
Down – Press and release DELAY button
Exit to calibration - Press and release TEST button
CALIBRATION
Default setting: 50
Range adjustment: 00 - 99
To change the value:
Up - Press and release RUN button
Down – Press and release DELAY button
Exit to Auxiliary switch type - press and
release TEST button
AUXILIARY SWITCH TYPE
TYPE:
00 Latching
01 Momentary
Up - Press and release RUN button
Down – Press and release DELAY button
Exit to standby - Press and release TEST button
START DELAY
From Standby, press and release DELAY button to
increment value
Default setting: 05
Range adjustment: 01 - 99
Exit to standby - press and release RUN button
RUN-ON TIME
From Standby, press and release RUN button to
increment value
Default setting: 20
Range adjustment: 01 - 99
TEST MODE
From Standby, press and release TEST button
Test Mode sequence will start:
1. The start delay value will count down to 0
2. Pump will start
3. The run value will count down to 0
4. Pump will stop
5. Test completed - the Pump will revert to
Standby mode
This test can be carried out with or without water
present and the sensor fitted or not
Testing the Pump

Technical Support: 01905 560 219 15Order: 01905 823 299 |orders.akw-ltd.co.uk
15
COMMISSIONING CHECKS
Commissioning Checks
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

General: 01905 823 298 | www.akw-ltd.co.uk16
16
CARE AND MAINTENANCE
Care and Maintenance
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.

Technical Support: 01905 560 219 17Order: 01905 823 299 |orders.akw-ltd.co.uk
17
TROUBLE SHOOTING
Trouble Shooting
Reported fault
No lights on the pump display
Pump does not activate
when shower is turned on
Pump comes on but
does not draw water
Possible causes
Fuse/fuse board turned off
Isolation switch is turned off
Break in the supply cable to the pump
Not wired in correctly
Flow sensor or sensors if a mixer
shower not connected properly
Flow sensor incorrectly wired up
Flow sensor faulty
Pump is not paired correctly if
no ow sensor if has a wireless
connection
Pump is calibrated too low to
activate from the water pressure
Insufcient water pressure to
activate the ow sensor
Flow sensor is blocked
Possible ingress of air in the
pipework to the pump
Possible blockage in the pipework
to the pump
Pump not calibrated correctly to draw
water away sufciently
Possible blockage in the non return
valves
Possible blockage in the pump head
Checks and work to be undertaken
Check power supply to the unit
Check the wiring to the pump
Check the cable to the pump
Check water pressure to the shower
is sufcient to activate the ow
sensor, check the ow sensor is tted
in the correct orientation
Check ow sensors wired correctly
Re-pair the pump and the shower
if a wireless connection
Check calibration settings
– should be over 50
Test ow sensor under running tap
while connected to the pump to see
if activates it
Check ow rate to ow sensor
is a minimum of 2 litres a minute
Check the lter is tted before the
ow sensor in the supply pipe and
that the ow sensor is clear
Attach temporary pipework to the
inlet side of the pump and get it to
discharge water from a bucket when
shower turned on and sprayed into
the bucket
Attach temporary pipework to the
inlet and outlet sides of the pump
and get it to discharge water from
one bucket to another bucket when
shower turned on and sprayed into
the bucket
Check the calibration of the pump
Remove the pump head and check
for blockages to pump head and
non-return valves
Remove the pump head and check
for blockages to pump head and
non-return valves

General: 01905 823 298 | www.akw-ltd.co.uk18
18
TROUBLE SHOOTING
Trouble Shooting
Reported fault
Pump comes on but
does not draw water (cont.)
Pump does not
remove enough water
Possible causes
Non-return valves are damaged
Split diaphragm
C’ clips not installed so causing air
ingress
Pump heads direction of ow
incorrect
Non-return valves are not tted
or incorrectly tted
Pump not calibrated correctly
to suit the installation
Ingress of air in the pipe work
Blockage or debris in pipework
Damage to non-return valves
Debris in pump head
Split diaphragm
C’ clips not installed so causing air
ingress
Checks and work to be undertaken
Check for damage to the
non-return valves
Check diaphragm for damage
Check ‘C’ clips are installed to the
inlet and outlet pipework
Check the direction of ow of the
pump head
Check the non-return valves
are correctly tted
Adjust the calibration and settings
Attach temporary pipework to the
inlet side of the pump and get it to
discharge water from a bucket when
shower turned on and sprayed into
the bucket
Attach temporary pipework to the
inlet and outlet sides of the pump
and get it to discharge water from
one bucket to another bucket when
shower turned on and sprayed into
the bucket
Remove pump head to check
for damage or debris
Remove pump head to check
for damage or debris
Check diaphragm for damage
Check ‘C’ clips are installed to the
inlet and outlet pipework

Technical Support: 01905 560 219 19Order: 01905 823 299 |orders.akw-ltd.co.uk
19
TROUBLE SHOOTING
Trouble Shooting
Reported fault
Pump is noisey
Water is left in the tray when
shower is turned off
Water in tray after while
Possible causes
Pump not set up and calibrated
correctly
Ingress of air in the pipe work
Pump not xed correctly
Pump xed on a stud wall
Delay, run on and calibration not
set up to suit installation
Shower volume too great for
the size of the pump
Debris or blockage
in the waste or pipework
Ingress of air in the pipe work
Possible shower leak
Pump not set up correctly
Water not gone through pump due
to short run on, has gone back to its
lowest level via gravity
Checks and work to be undertaken
Adjust the settings and
calibration on the pump
Check ‘C’ clips are installed to
the inlet and outlet pipework
Make sure is rmly xed to
a wall and ideally a solid wall
Make sure is rmly xed to
a wall and ideally a solid wall
Settings should be changed from
factory setting which are:
Delay: 5 seconds
Run on: 20 seconds
Calibration: 50 seconds
Check shower ow volumes
at different settings
Attach temporary pipework to the
inlet side of the pump and get it to
discharge water from a bucket when
shower turned on and sprayed into
the bucket
Attach temporary pipework to the
inlet and outlet sides of the pump
and get it to discharge water from
one bucket to another bucket when
shower turned on and sprayed into
the bucket
Check shower for leaks
Set run on to a longer time
Set run on to a longer time

General: 01905 823 298 | www.akw-ltd.co.uk20
20
NOTES
Notes