Akw Luda User manual

UK
USA
INSTRUCTIONS
GB and International patents
pending, EU Registered Design
000741558-0001/2/3/4,
International and other Designs
Pending.
*Luda®S does not carry RNIB Ref.
Read all instructions carefully before installation.
Leave this booklet with the end user for future
reference and servicing.
INSTALLATION
Instructions & Service Manual
approved
product
UK WATER SUPPLY
REGULATIONS
IP45
RNIB
Approved
Approved
INTERTEK
BEAB
BEAB
BBEA
BBEA
BB
EA
EMC Verified
BEAB
CARE
Approved
Approved
INTERTEK
BEAB
BEAB
BB
EA
BBEA
BBEA
EMC Verified
BEAB
CARE
BEAB
CARE
WRAS
WRAS WRAS
WRAS
WRAS
A
P
P
R
O
V
E
D
P
R
O
D
U
C
T
Luda® -Luda® S
8.5kW AKW Intelligent Shower®
11-008-058-01
*(For User Instructions read from back page)

Take time to read these instructions thoroughly before starting installation and leave
with the end user for future reference.
Shower installation must be carried out by a suitably qualified person (eg NIC EIC)
and in accordance with these instructions.
This unit is the first BEAB Care shower which can be installed in the sprayhead
splash zone because it has the higher IP45 (water resistance safety rating) and this is
why there are more case screws. All case screws must be fitted.
Take time to complete the installation details and record the commissioning tests for
future reference, see pages 36 & 37.
Page 2
Contents Page
Introduction 2
Important Safety Information & Requirements 3-5
Specifications 6
Features & Components 7
Main Components 8
Electrical / Water Requirements 9-12
Positioning of Shower 13
Shower Heater Main Components 14
Installation, Positioning & Fitting To Wall
15-16
Plumbing Installation 17
Water Priming 18
Electrical Installation 19-21
Commissioning 22-25
Fault Finding 26-28
Service Engineer Fault Diagnosis tables 29-32
Service Engineer Maintenance 33-34
Spare Parts / Installation Details / In-Service Tests 35-39
Warranty / Contact Information 8-9
User Care and Maintenance / User Fault Diagnosis 6-7
User Operating Instructions 2-5
INTRODUCTION

Warning
This product must be used and maintained in good working order in
accordance with these instructions and recommendations.
IMPORTANT: Read all of these instructions. Ensure they are
retained by the user for recording future maintenance or servicing.
This product is only suitable for mains fed COLD WATER.
DO NOT take risks with Plumbing or Electrical Installation.
Only competent trades persons should carry out this installation.
DO NOT install or operate shower if the location is liable to freezing.
DO NOT operate shower if water has leaked inside the unit before operation.
DO NOT remove shower front cover when in operation.
DO NOT operate the shower if water ceases to flow during operation.
DO NOT operate the shower if the spray head or hose is damaged.
DO NOT restrict flow out of the shower by blocking or obstructing spray handset.
The outlet must not be connected to any other parts or fittings other than
EC1 Luda shower handset and Hose or EC2 Luda S shower handset and Hose.
Maintenance may be required before the appliance can be safely used. This is to be
carried out by competent trades persons only. See service engineers section.
There are no user-serviceable components beneath the shower cover.
Only a competent trades person should remove this cover and use genuine AKW
replacement parts. See spare parts section.
Isolate the electrical and water supplies before starting any work and review this
installation guide or contact your installer:
if the shower cover is not correctly fitted and water has entered the case,
if the case or cover is damaged or broken,
if the appliance shows signs of distinct change in performance, strange
noises or begins to smell or smoke,
(Refer to “Contact Information” page 9 of the User Instructions and Warranty.)
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
Page 3
PLEASE READ ALL INSTRUCTIONS CAREFULLY AND
IMPORTANT SAFETY INFORMATION BEFORE
COMMENCING INSTALLATION

Caution! Danger of Death 230V AC
Lethal Voltage present on the AC supply.
This Appliance MUST BE EARTHED. Make sure any Supplementary bonding
complies with the requirements for electrical installations and Wiring regulations in
accordance with BS 7671.
Make sure mains power is off before installation.
This Appliance is intended to be permanently connected to the live wiring of the
electrical mains supply system.
Other electrical equipment must not be connected to the same shower circuit.
This product must be installed by a qualified and competent electrician and in
accordance with the current edition of the Wiring Regulations BS 7671.
Switch off at the isolating switch when not in use.
This is a safety procedure recommended with all electrical appliances.
It is recommended that the shower and installation is checked every two years by a
competent electrician to ensure there is no deterioration due to age or usage.
Plumbing Precautions
The plumbing installation must comply with Water Fitting Regulations,
Building Regulations and should be in accordance with BS 6700.
The optional hose retainer must be used to comply with the Water Fitting Regulations
and prevent water supply contamination Category 5 installations where double check
valves are not installed. Note that both Luda and Luda s have double check valves.
Make sure there is a Cold Water feed near to the installation with a local service
isolation valve.
Chrome Plated or Stainless Steel Supply Pipes.
DO NOT connect the shower unit directly to chrome plated or stainless steel pipe.
Standard JG pipe connectors ARE NOT SUITABLE for connecting to CHROME
or STAINLESS PIPEWORK.
AKW Recommend the use of a John Guest chrome pipe adaptor (Part No.25283.
Top and Rear Entry only) or an equivalent.
Chrome plating must be completely removed 20mm before insertion into
standard JG fittings. Always use the Collet Clips provided.
Flush the supply pipe prior to connecting the shower unit to remove any debris in the
pipework.
DO NOT solder pipes or fittings within 110mm of the shower appliance.
DO NOT fit any form of outlet flow control to the water heater.
DO NOT use excessive force when making connections to the water supply inlet, the
flexible hose or the spray head.
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
Page 4
Complete all plumbing connections prior to making any
electrical connections.
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
IMPORTANT SAFETY INFORMATION

NOTE: The manufacturer’s rigorous quality systems may
require operating the shower with water at the factory.
The water shall be removed where possible, however there
may be a small amount of water residue left in the shower.
A sealing pipe is used to prevent any excess water from entering
inside and damaging the unit.
It is essential the commissioning procedure is followed carefully to prime the
unit with water prior to switching on.
Failure to carry out this operation will result in damage to the unit and will
invalidate the warranty.
The shower must not be exposed to freezing conditions.
Make sure pipework is properly insulated.
If the appliance is frozen the warranty will be void.
The unit must be mounted onto the finished wall surface (on top of the tiles).
DO NOT tile up to or around the unit after fixing to wall.
If the shower is installed in areas of hard water (above 200 ppm temporary hardness),
a scale inhibitor may have to be fitted. For advice contact AKW Customer Service,
Refer to “Contact Information” page 9 of the User Instructions and Warranty.
This product is not suitable for fitting in steam rooms.
Regularly clean the spray head with descalent, failure to do this may restrict water
flow resulting in higher temperatures, this could also cause operation of the Pressure
Relief Device (PRD).
Page 5
Locate the product identification label on
the shower casing for completing the installation details on page 36.
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
IMPORTANT SAFETY INFORMATION
NOTES ON LABEL DETAILS:
1. TEXT, SYMBOLS AND LOGO ARE BLACK ON WHITE OR SILVER BACKGROUND.
2. WATER PROOF ADHESIVE SUITABLE FOR BONDING LABEL TO SURFACE.
3. LABEL PRINTING AND ADHESIVE PEEL STRENGTH MUST MEET BS 60335 DURABILITY
REQUIREMENTS FOR RESISTANCE TO ABRASION AND REMOVAL FROM PRODUCT.
4. LABEL TO INCLUDE NUMBERS AND SYMBOLS AS INDICATED.
5. LOGO AND LABEL ARTWORK IS AVAILABLE AS TIF,EPS or AI FILES "06-001-376-02LABEL.PDF"
6. LABEL DIMENSIONS 80X25X0.3 MM (No Boarder) just shows Dimensions
7. DRAWING NO. 06-001-376 DEV1
Luda
®
- AKW Intelligent Shower
999991234500
Model 29005
230-240V 50Hz 7.8-8.5kW OUTLET RATED 0MPa(BAR)
SUPPLY INLET: 0.05-1MPa (0.5 - 10 bar) IP45
SAFETY VENT - NEVER BLOCK WATER OUTLET
KEEP SPRAY HEAD HOLES CLEAR AND CLEAN
USE ONLY AKW HOSE AND SPRAY HEAD
Approved
INTERTEK
B BEA
B E A B
C A R E
®
NOTES ON LABEL DETAILS:
1. TEXT, SYMBOLS AND LOGO ARE BLACK ON WHITE OR SILVER BACKGROUND.
2. WATER PROOF ADHESIVE SUITABLE FOR BONDING LABEL TO SURFACE.
3. LABEL PRINTING AND ADHESIVE PEEL STRENGTH MUST MEET BS 60335 DURABILITY
REQUIREMENTS FOR RESISTANCE TO ABRASION AND REMOVAL FROM PRODUCT.
4. LABEL TO INCLUDE NUMBERS AND SYMBOLS AS INDICATED.
5. LOGO AND LABEL ARTWORK IS AVAILABLE AS TIF,EPS or AI FILES "11-008-055 REV1.PDF"
6. LABEL DIMENSIONS 80X25X0.3 MM (No Boarder) just shows Dimensions
7. DRAWING NO. 11-008-055- REV01
230-240V 50Hz 8.1-8.5kW OUTLET RATED 0MPa(BAR)
Model 29006
SUPPLY INLET: 0.05-1MPa (0.5 - 10 bar) IP45
SAFETY VENT - NEVER BLOCK WATER OUTLET
KEEP SPRAY HEAD HOLES CLEAR AND CLEAN
USE ONLY AKW HOSE AND SPRAY HEAD

ELECTRICITY SUPPLY
Nominal Rating at 240 V
Supply Fuse / Circuit Breaker
Supply Source Mains pressure cold water only
Minimum Dynamic Pressure 50kPa (0.5 Bar)
Maximum Static Pressure 1000 kPa (10 Bar)
Optimal Minimum Dynamic Pressure 100 kPa (1 Bar)
Maximum Inlet Temperature 28°C
Minimum Inlet Temperature 2°C
Inlet Connection 15mm pushfit(John Guest Fitting)
Outlet Connection 1/2” BSP Male thread Fitting
PLUMBING SUPPLY
Page 6
*
For Optimal Product Performance the recommended minimum dynamic water
pressure should be 100kPa (1 Bar).
This Product Complies with the requirements of current British and European safety
standards for household appliances, and has met the following harmonised european
standards in the confirming assessment.
Complies with requirements of the British Electrotechnical Approvals Board (BEAB).
BEAB APPROVED / BEAB CARE / KIWA / RNIB / WRAS / IP45
BS EN 60335-1:2002, BS EN 60335-2-35:2002, BS EN 50366:2003
*
Specifications
Height 435 mm
Width 234mm
Depth 110mm
Water Ingress Rating IP45
Water and Cable Entry Points Top, bottom or back.
Shower Drain Pump Connections Suitable for M Series, D4 (Flow Sensor)
or AKW A4
(Flow Switch) connections
on AKW products only.
29005-8.5kW
29006-8.5kW
Residual Current Device (RCD) 30 mA (must be fitted)
Continuously Rated
Supply Cable Refer to current wiring regulations
and BS 7671 to determine minimum
cable size. No larger than 16mm2
Isolation Switch (e.g. Pull Cord) 45 Amp Double pole with 3mm
contact separation.
29005-8.5kW 40A
29006-8.5kW 40A

The Intelligent shower has been designed specifically as a thermostatically controlled
‘CARE’ shower to meet the requirements of current British and European safety
standards for household appliances.
This shower has a special water ingress safety standard rating, making this the first
care shower to meet the IP45 (water resistance safety rating) and this why there are
many case screws. All case screws must be fitted.
This shower also has an integral non-return value, so the shower hose does not
need to be retained in anyway.
The Intelligent shower has a large ergonomic touch panel. This has been specifically
designed to allow for easy operation. The large display panel clearly indicates the
level of temperature and flow rate.
Temperature / flow rate
Adjusting the temperature may affect the flow rate.
The maximum flow rate for the given temperature may be greater in Summer than in
Winter due to the warmer mains water supply.
Flow setting
The shower is adjusted in 3 stages- low, medium and high.
Phased Shut down
The power button will flash for around 5 seconds after being pressed as the system
shuts down in an ordered manner and then turns off.
Auto shut down
The shower will automatically shut down after 30 minutes of operation. It can be
restarted immediately.
Safety cut-out
The shower is fitted with an over-temperature safety device.
In the event of abnormal operation which could cause unsafe temperatures within
the unit, the device will disconnect the heating elements.
It will require a visit from a service engineer to determine the nature of the fault and
replace the safety device.
Replacement parts can be ordered from Customer Services. See Spare Parts
page 35. For more information refer to “contact information” page 9.
Due to the AKW policy of continuous improvement, this specification may be altered
without prior notice.
Page 7
Features & Components

Page 8
Box contents
1. Shower Unit
2. Shower Spray Head
3. Shower Hose
4. Riser Rail
5.2x Grab Rail 900Elbow
6. Grab Rail1800 Elbow
7. Shelf
8. Soap Dish
9. Soap Dish Cover Cap
(use if shelf not fitted)
10. 2x Rail Slider
11.Soap Dish Adapter
Hook
12.Optional Hose Retainer
(use if required)
13.Shower Head Wall
Bracket
14. Pump signal wire
Insulating Sleeve
15. 3x Wall Screws
16. 3x Wall Plugs
17. Instructions
18. Registration /
Warranty Card &
Envelope.
1
2
3
4
6
15
7
8
10
5
16
17 18
13
5
9
11
10
Check all packaging for screw packs and other parts
14
12
Main Components & Box Contents Checklist

Caution
Danger of Death 230V AC
Lethal Voltage present on the AC supply.
WARNING - THIS APPLIANCE MUST BE EARTHED
The installation, supply cable and circuit protection must conform to the current
wiring regulations and be sufficient for the amperage required and length of
cable run.
Before making electrical connections within the installation, ensure that the electrical
supply has been isolated.
The shower must be connected to its own independent electrical circuit.
IT MUST NOT be connected to any other ring main, spur, socket outlet, lighting
circuit or cooker circuit.
The electrical supply must be adequate for the loading of the unit and existing circuits.
Check your consumer unit (main fuse box) has a main switch rating of 80A or above
and that it has a spare fuse way which will take the miniature circuit breaker (MCB)
necessary for the shower (see schematic of installation circuit).
If your consumer unit has a rating below 80A or if there is no spare fuse way, then
the installation may require a new consumer unit serving the house or just the shower.
Contact the local electricity company if in any doubt.
The earth continuity conductor of the installation must be effectively connected
electrically, to all exposed metal parts of other appliances and services in the room in
which the shower is to be installed. This must conform to current wiring regulations.
All the applicable exposed metallic parts in the bathroom must be bonded together
using an earth cable of at least 4mm2cross sectional area, in accordance with the
requirements of the wiring regulations. These parts may include metal baths, radiators,
water pipes, taps and waste fitting.
Page 9
Electrical Requirements

For adequate circuit protection DO NOT use a rewireable fuse. Instead use a
suitably rated miniature circuit breaker or cartridge fuse.
CIRCUIT PROTECTION -
A 30mA residual current device (RCD)
must be installed.
A 45 amp double pole isolating switch with a minimum contact gap of 3mm 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, but out of reach of a
person using a fixed bath or shower, except for the cord of a cord operated switch
and should be placed so that it is not possible to touch the switch body while stand-
ing in a bath or shower cubicle. It should be readily accessible to switch off after
using the shower.
Where shower cubicles are located in any rooms other than bathrooms, all the
socket outlets in those rooms must be protected by a 30mA RCD.
Consult the wiring regulations.
To obtain full advantage of the power provided by the shower, use the shortest cable
route possible from the consumer unit to the shower.
Page 10
Shower unit 45A Double pole isolating
switch (eg Pull cord)
30mA RCD
(may be part of consumer unit)
Consumer unit (80A
minimum isolating
switch rating)
All components must be rated and installed in accordance with wiring regulations.
The appliance must be earthed.
Electrical Requirements
29005
29006
8.5kW 240V AC
MCB 40A

The current carrying capacity of the cable must be at least that of
the shower circuit protection.
Refer to the current wiring regulations BS 7671 to determine
minium cable size.
Do not exceed 16mm maximum cable size for this product.
Site conditions must be assessed by a competent electrician to determine correct
cable size and permissible circuit length.
Shower circuit cable separation from other circuits must meet wiring regulations.
It is strongly recommended to use a minimum of 10mm2cabling throughout the
shower installation.
Note: the electrical insulating sleeve supplied must only be used to insulate
the pump signal wire, shown on page 20.
Page 11
Failure to install this AKW product in accordance with supplied instructions
or the making of any unauthorised modifications will invalidate any warranty
and will affect product safety.
WARNING - THIS APPLIANCE MUST BE EARTHED
2

The installation must be in accordance with Water Regulations and Byelaws.
To ensure activation of the heating elements, the shower must be connected to a
mains cold water supply with a minimum running pressure of 50kPa (0.5 bar) at a
minimum flow rate of nine litres per minute with a maximum static pressure of
1000kPa (10 bar). For Optimal Product Performance the recommended minimum
dynamic water pressure should be 100kPa (1 Bar). Dynamic pressure should not fall
below 50kPa (0.5 bar) when other draw offs are used (e.g. flushing toilet).
Note: An Isolating stop valve must be provided before connecting to the shower.
We recommend that isolation valves (not supplied) must be fitted as close as is
practicable to the water supply inlets of the shower heater whilst being accessible for
maintenance and servicing purposes.
Page 12
Mains COLD
water supply
must be isolated
with a stopvalve.
Pipe entry from
either top, offset
rear or bottom.
Mains electric supply must be
isolated with a 45amp double
pole isolating switch.
Mains supply
permanently
connected to
consumer unit.
Consumer unit
containing 30mA RDC.
A typical system layout is shown below. Not to scale.
Water Requirements
DO NOT use sealing compounds on any pipe fittings for the installation.
Never fit the appliance to the hot water supply.
Note: If the stated flow rates are not available, it may not be possible to achieve
optimum performance from the unit throughout the year.

WARNING! The shower must not be positioned where it will be
subjected to freezing conditions.
FOR EASE OF SERVICING, THE UNIT MUST ALWAYS BE MOUNTED ON THE
FLAT SURFACE OF TILED WALLS. NEVER TILE UP TO THE SHOWER UNIT.
IMPORTANT: The flat surface must cover the full width and length of the back
plate, otherwise difficulty may arise when fitting the cover and subsequent operation
of the unit may be impaired.
Refer to the illustration below for correct positioning of the shower controls and
showerhand set. Position the shower unit vertically.
Check there are no pipes or electrical cables inside the wall before drilling.
Page 13
Shower unit can be mounted either side of riser rail.
Ensure minimum
side and top
clearance of
120mm.
The height of the controls are dependent
upon the type of installation.
For non-dwelling locations refer to
Building Regulations Document M
diagram 23 (min 750mm, max 1000mm)
and for the shower head (min 1200mm,
max 1400mm.) Further reference may also
be made to BS8300:2009 (non-dwellings)
or DD266:2007 (dwellings).
Alternatively, a height for both as specified
by an Occupational Therapist to suit a
specific user needs may be required.
Positioning of Shower
DO NOT obstruct the back and sides of the shower as this will prevent the
Pressure Relief safety Device from operating.
DO NOT operate the shower with a damaged or kinked shower hose, or a blocked
spray head which can cause the Pressure Relief Device (PRD) to operate.
When commissioning, the spray head must be removed from the flexible hose.
Failure to follow this procedure may cause the PRD to operate.
Ensure the unit is positioned over a bath or shower tray.
If the Pressure Relief Device operates, switch the unit off at the pull-cord and contact
Customer Service for advice on replacing the PRD.

Page 14
Safety seal cover.
This must be fitted at all
times the unit is powered.
Top pipe inlet and
cable entry cover
Terminal block
Bottom pipe inlet and
cable entry cover
Shower hose outlet
Power Circuit Board
(PCB)
Water heater can
Air bleed button
Rear pipe inlet
and cable entry
John Guest*Pipe
Connector
Filter
Mounting screw
cover
Mounting screw
cover
Mounting screw cover
DIP
switch
Front
Cover
Ribbon cable
5x seal screws
Shower Heater Main Components
Flow valve

Installation Fitting shower to the
wallInstallation Fitting shower to the
wall
Ensure that the water supply is turned off.
Ensure that the electrical supply is switched off at the
mains.
Disassemble shower to get to the components by removing the front coverplate and
unscrewing the front cover from the main body. Retain all the screws for IP45 rating.
Front coverplate
Front cover
Step 1 Determine the positioning of the cable and water-pipe entries.
Lift off the front coverplate and entry covers.
Entry cover
Entry cover
Remove
Ribbon
cable
Disconnect the ribbon cable from the PCB to separate the front
cover from the shower.
Page 15
Step 2
PCB
Installation Fitting shower to the wall

Remove the Safety Seal Cover
(5 screws) and determine the
positioning of the cable and
water-pipe entries.
Turn the John Guest*Inlet
Connector to suit supply
pipe. See step 5.
Remove sealing caps.
Caution! Do not drill into
cables or pipes.
Step 3
Step 4
Choose the shower location.
Only seal between the pipe and
the wall to prevent water enter-
ing the wall for back entry.
F-
F
+
S1
F-
F
+
S
1
3X Screw
fixing positions
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
3X 3x
Page 16
CASE PREPARATION
Remove the 3 fixing
screw sealing caps.
Use the back plate as a template, ensure it is vertical.
Mark the fixing holes ensuring the cable and pipe positions align
with the entry positions on the shower. Drill and insert wall plugs
taking care there are no hidden cables or pipes.
Important! Replace the 3 fixing
screw sealing caps.
CAUTION
READ INSTRUCTIONS
BEFORE INSTALLING
THIS PRODUCT
Route the Sensor cable for the drain
pump (if applicable). See page 20.
Use all 3 screw fixing positions.
Installation Positioning

Step 5
Remove the sealing pipe from the
John Guest*fitting.
Note: The sealing pipe is used
to stop any excess water from
entering inside and damaging the
unit. See page 5.
Separately flush the pipework to
remove any debris before firmly
connecting the deburred end
of the waterpipe onto the John
Guest*fitting, ensuring the pipe is
fully engaged.
Following all the normal John
Guest Speedfit*assembly
precautions and instructions.
Always fit the locking
collet clip to the collar.
The pipe fitting is not
suitable for direct
connection to chrome plated
or stainless pipe.
Note: Offset Rear entry pipe is
only recommended for ease of
installation and servicing if the top
or bottom entries are not
possible. If a soldered Elbow
connector is used then this
should be minimum 110mm
from the JG inlet connector. This
pipework must not apply strain to
the elbow fitting on the shower.
Failure to observe this essential
precaution will invalidate the
warranty.
Ensure the shower is securely
fixed to the wall and is vertical.
Replace the 3 Fixing screw
sealing caps. Connect the hose,
but not the handset.
Point the hose into the bath or
shower tray without the handset.
PIPEWORK CONNECTION ONLY SUITABLE FOR COLD WATER SUPPLY
Locking collet
WARNING! Do not use a silicone sealant to seal between the unit case and the wall
Minimum
110 mm
Minimum
110 mm
Offset Rear Entry
Bottom Entry
*John Guest and Speedfit are registered trade marks of John Guest International Limited.
Installation Plumbing Connections
Top Entry
Minimum
110 mm
Minimum
110 mm
Offset Rear Entry
Note: An Isolating stop valve must be fitted to the cold water
supply pipe to allow for maintenance and servicing.
Chrome plating must be completely removed 20mm prior
to insertion into a Standard JG fitting; alternatively use a
male stem pipe adaptor (Spare Part No.25283. Top and
Rear Entry only).
Page 17

Page 18
F-
F+
S1
S2
Air Bleed Button
Press the AIR BLEED button to prime the
appliance before installing the electricity.
Turn on the water supply and check there are no leaks - no water should flow
through the shower at this point.
Place absorbent material around the air bleed button area.
Gently press down the AIR BLEED button to vent air from the appliance until water
appears.
Once you have checked that there are no leaks Turn off the water supply before
installing the electricity.
Failure to prime will seriously affect the shower performance.
Dry off any water in and around the appliance before connecting or reinstating
the electricity.
Step 6 WATER PRIMING PART 1 (SEE PAGE 23 FOR PART 2)
Important! This unit must be primed with water before installing the electricity.
Make sure electricity is isolated!
WATER PRIMING

Ensure the terminal screws are fully tightened and no insulation is trapped in or
under the screws.
The earth connector must be sleeved.
The supply cable must be secured in accordance with current wiring regulations.
N E L
F-
F
+
S1
F-
F
+
S
1
N = Blue
E = Green
L = Brown
Page 19
CONTROL PCB
POWER PCB
RELAYS
240V
AC
Water in
Filter Flow
Meter
T
in
T
out
Solenoid
Valve
Check
Valve
Water
out
TCO
Elem 4
Elem 3
Elem 2
Elem 1
PRV
N
E L
1. Terminal Block
2. On/Off PCB
3. Control PCB
4. Power PCB
5. Ribbon Cable
6. Thermal Cut-out
7. Relays
8. Elements
9. Solenoid Valve
4
2
˚
3
1
6
5
5
777
8
8
8
9
Flow
Meter
C
In
˚C
Out
System Wiring Diagram
1. Terminal Block
2. On/Off PCB
3. Control PCB
4. Power PCB
5. Ribbon Cable
6. Thermal Cut-out
7. Relays
8. Elements
9. Solenoid Valve
Installation Electrical Connections
N E L

F-
F+
S2
S1
White
Red
Black
A4 & A4F
M & D4
Return
- ve
+ ve
Signal
F-
F+
S2
S1
(F+,F-) Symbols may not be
present on connector block
Pump Wire
White -ve
White +ve
Ensure AKW Pump
Sensor cable is
covered by the
supplied insulating
sleeve before
connecting to the
pump terminal
block on the PCB.
OR
Make provision for the sensor cable to connect the pump to the shower (If Applicable.)
Ensure the sensor cable is fed into the bottom entry of
the shower and sealed by the safety seal cover.
Refer to
correct
Pump
Installation
Instructions
Flow Sensor cable connections-
M Series DigiPump & D4 Pump
Flow Switch cable connections-
Manual Pump A4 Series
Flow Sensor Connections- M Series Digi Pump & D4 Pump
Black (- ve) - connect flow sensor wire to F+
White (Signal) - connect flow sensor wire to F-
Red (+ ve)- connect flow sensor wire to S2
Page 20
Sensor Cable
Flow Switch Connections- Manual Pump A4 Series
(- ve)White -connect flow switch wire to S2
(+ ve)White +connect flow switch wire to S1
(use electrical
insulating sleeve)
AKW Pump Signal Cable Connections (optional)
Flow Sensor or Switch Signal Cable Connections (optional)