Henden HPHDB Operating instructions

INSTALLATION &
OWNERS MANUAL
IMPORTANT
Please read carefully
Please pass these instructions on to the operator of this equipment
pH Dosing Pump
HPHDB
WARNING:
Failure to follow
these instructions
and comply with all
applicable codes
may cause serious
bodily injury and/or
property damage.
The installation of
this product should
be carried out by a
person knowledgeable
in swimming
pool plumbing
requirements following
the installation
instructions provided
in this manual.

HENDEN INSTALLATION & OWNERS MANUAL |3
Contents
pH Dosing Pump
INSTALLATION
1. WARNINGS AND TIPS 4
1.1 Proper use of the pump 4
1.2 Risks 4
1.3 Toxic and/or Dangerous Liquid Dosage 4
1.4 Instruction for Diluting Pool Acid 4
2. PUMP DESCRIPTION 5
2.1 Parts Description 5
2.2 Pump Interface 5
3. INSTALLATION AND RECOMMENDATION 6
3.1 Recommendations 6
3.2 Mounting the pump 6
3.2.1 Bracket 6
3.2.2 Mounting of the Clamp 6
3.2.3 Mounting of the Probe on the Probe Holder 6
3.2.4 Mounting of Injection Valve 6
3.2.5 Mounting of the Tube into the Injection Valve 7
4. CONNECTING THE POWER AND POOL PUMP
TO YOUR PH CONTROLLER 7
OWNERS MANUAL
5. COMMISSIONING AND OPERATION 8
5.1 Calibration Procedure 8
5.2 Important Points 8
5.3 Settings 9
5.3.1 Adjustment of the Set Point 9
5.4 Operating Principle 9
6. MAINTENANCE 9
6.1 Replacement of the Perastaltic Tube 9
6.2 Maintenannce of the Perastaltic Tube 10
6.3 Maintenance of the Electrode 10
6.4 Controller Winterising 10
6.5 Probe Winterising 10
7. TROUBLE SHOOTING 10
Henden™Repair and Replacement Guarantee 11

4|HENDEN INSTALLATION & OWNERS MANUAL
Henden pH Dosing Pump Installation Manual
INSTALLATION
In accordance with AS/NZS 60335.2.41
we are obligated to inform you that this
pump is not to be used by children or
infirm persons and must not be used as
a toy by children.
1. WARNINGS AND TIPS
Please read the warning notices very carefully because they
provide important information regarding safety in installation,
maintenance and use of the Henden pH Dosing Pump.
• Keep this manual in a safe place, so that it will always be
available for further consultation.
• The device complies with EMC:2004/108/EEC
“electromagnetic compatibility” and LVD:2006/95/EC
“low voltage” and also the subsequent modifications.
Note: This pump has been constructed in accordance
with best practice. Product life, electrical and mechanical
reliability will be enhanced if it is correctly used and
regularly maintained.
WARNING Any intervention or repair to
the internal parts of the pump must be
carried out by qualified and authorised
personnel.
1.1 Proper use of the Pump
The Henden pH Dosing Pump should be used only for the
purpose for which it has been expressly designed namely
the dosing of liquids. Any different use is to be considered
dangerous. The pump should not therefore be used for
applications that were not allowed for in its design. In
case of doubt, please refer to the details listed within this
document, or contact your point of purchase or Henden for
further information. Henden will not be liable for damage
deriving from improper, erroneous or unreasonable use of
the Henden pH Dosing Pump.
1.2 Risks
• After unpacking the pump, make sure that it is
completely sound. In case of doubt, do not use the
Henden pH Dosing Pump and contact Henden.
• The packing materials (plastic bags, polystyrene, etc.)
should be kept out of the reach of children: As they may
constitute a potential source of danger.
• Before you connect the Henden pH Dosing Pump make
sure that the voltage ratings correspond to your particular
voltage supply. You will find this value on the rating plates
attached to the Henden pH Dosing Pump.
• The electrical installation to which the Henden pH Dosing
Pump is connected must comply with the local standards
enforced in the state or country under consideration.
• Use of electrical equipment always implies observance of
some basic rules. In particular:
– Do not touch with wet or damp hands or feet
– Do not operate the Henden pH Dosing Pump with bare
feet (example: swimming pool equipment)
– Do not leave the equipment exposed to atmospherit agents
– Do not allow the Henden pH Dosing Pump to be used by
children or unskilled individuals without supervision
Never connect your pH pump direct to
mains power. Always connect it to the
chlorinator power supply so it operates
during the preset filtration time cycles.
• In case of breakdown or improper functioning of the
pump, switch it off, but do not touch. Contact Henden
for technical assistance for any necessary repairs and
insist on the use of original spares. Failure to respect
this condition could render the Henden pH Dosing Pump
unsafe to use.
• When the Henden pH Dosing Pump is not in use for a
substantial period of time, or use is to be discontinued,
disconnect the unit from any power supply.
Before carrying out any service on the Henden pH
Dosing Pump:
1 Disconnect the mains power from the unit and
2 Relieve all the pressure from the pump head or the
injection tube
In the event of possible losses on the hydraulic system of
the pump (breakage of the o-ring, the valves or the hoses),
stop the pump immediately and contact Henden.
1.3 Toxic and/or Dangerous Liquid Dosage
To avoid risk from contact with hazardous liquids or toxic
fumes, always adhere to the notes in this instruction
manual and wear protective clothing (gloves, goggles &
overalls). You must:
• Follow the instructions of the dosing liquid manufacturer.
• Check the tubing regularly and use only if there is
no damage.
• Contact Henden for technical assistance for any
necessary repairs and insist on the use of original spares.
• Before disconnecting the metering pump, make sure to
flush out and neutralise the pump head with water.
1.4 Instructions for diluting pool acid
The Henden pH pump automatically doses a diluted acid
solution into the pool when the pH level needs to be
reduced. The peristaltic pump draws this diluted acid from
a container in which the solution is mixed.
Use the table provided to determine what water/acid ratio
is recommended for your pool, in an approved 20 litre
Hydrochloric Acid container.
IMPORTANT:
KEEP BARE HANDS AWAY FROM POOL
ACID AND ALWAYS USE CAUTION WHEN
HANDLING POOL CHEMICALS.

Henden pH Dosing Pump Installation Manual
HENDEN INSTALLATION & OWNERS MANUAL |5
Pool Size
Recommended Water/Acid
Dilution Ratio
Volumes for a Suitable
20 Litre Container
Water (parts) Acid (parts) Water (Litres) Hydrochloric
Acid (litres)
Up To 100,000 litres 5 1 17 3
Above 100,000 to 160,000 litres 3 1 15 5
Note: These ratios are based on Hydrochloric Acid strength of 28% and should not be any greater than this percentage.
Please ensure that you keep the storage area of the acid well ventilated and ensure you use a suitable container with
resistance to Hydrochloric Acid.
2. PUMP DESCRIPTION
The Henden pH Dosing Pump is characterised by its ability
to measure pH value (between 0 and 14) with its probe
placed on the filtration system that analyses the pool water.
Depending of the measured value, the pump will inject
the required amount of product needed to maintain the
balance of the pool water.
The pump works in acid (pH-) or basic (pH+) dosage.
2.1 Parts Description
Here are the complete contents of the package you
received. All parts will be necessary for the proper
operation of your device.
2.2 Pump Interface
A. Peristaltic pump x 1
B. 4 meters of PVC Cristal tube x 1
C. Screws for wall mounting x 2
D. Masonry plugs for wall mounting x 2
E. Electrode/pH Probe & Protective Cap x 1
F. Clamp DN40 x 2
G. Clamp DN50 x 2
H. Foot filter x 1
I. Injection valve x 1
J. Inline electrode holder x 1
K. Buffer solution pH7 x 1
L. Shutter washer x 1
M. Controller mounting bracket x 1
CAL
SET
pH -
Fig. 2
1
5
2
3
4
1. Press SET to see and adjust the set point.
2. Press CAL to allow calibration of the pH to pH 7.0 when
using the buffer solution pH7.
3. Current value of pH being measured, eg 7.0
4.
pH -
unit of measurement and indicates that the device
must inject acid.
5. On/off button to turn on the device. When held down, this
button primes the pump.
AB
C D
E
F
G
IJ
K
L
M
40mm
50mm
H
1 x
Fig. 1

6|HENDEN INSTALLATION & OWNERS MANUAL
Henden pH Dosing Pump Installation Manual
3. INSTALLATION RECOMMENDATIONS
3.1 Recommendations
• Install the Henden pH Dosing Pump in a dry place and
well away from sources of heat and in environments not
exceeding 45°C. The operating minimum temperature
depends on the liquid to be pumped, bearing in mind that
it must always remain in a liquid state.
• Carefully observe any standards in force in your
state, territory or country, as to electrical installation
regulations and requirements.
• The Henden pH Dosing Pump should be in operation only
when your filtration pump is running.
3.2 Mounting the Pump
3.2.1 Bracket
1. Locate the bracket in the space chosen and mark the holes
2. Drill the holes as required (3mm for timber walls & 6mm for
masonry walls)
3. Fix the bracket to the wall
4. Slide and secure pump into the bracket
Ø4mm Ø6mm
35mm
Fig. 4
3.2.2 Mounting of the Probe Clamp
Choose a mounting location on your pipework that is:
1. Prior to your salt cell
2. BEFORE the placement of the acid injection point
3. Ensure the probe clamp lead is within reach of the
Henden pH Dosing Pump controller
Fig. 5
O-ring
Nut
Pierce the top wall of the pipe work through the clamp:
- 14 mm for the electrode/pH probe.
Fig. 6
E
E
3.2.3 Mounting of the pH Probe into the
Probe Holder
After removing the protective cap from the probe, you
need to insert all the parts as shown in the Fig.7.
Before inserting the probe into the pipe make sure you
calibrate the probe (refer to 5.1 Calibration Procedure for
instructions).
Once the probe has been constructed as indicated in Fig.7,
tighten the probe nut without crimping the probe body.
Push the probe approximately 20mm into the pipe work so
that the probe tip is approximately halfway into the pipe
work. Connect the probe lead to the BNC terminal on the
pump. (Fig8)
Nut
Disk brake
Washer seat
O-ring
Bracket
Fig. 7
WARNING
• It is important to keep a minimum
distance of 200mm between the probe
“C“ and the injection valve “E”
• The injection valve “E” must be
placed last in the pipework hydraulic
installation
• In the case of an installation with
redox and pH regulation, it is advised
to put the two sensors side by side
and the pH injection before chlorine
injection to minimise the risk of scale
deposition on the chlorine injection
• For optimal service life of your
peristaltic pump tube, it is advised
not to exceed a pressure of 1 bar and
under no circumstances exceed a
pressure of 1.5 bar
• The pH probe must be located before
any other device such as a heater or
an electrolyser

Henden pH Dosing Pump Installation Manual
HENDEN INSTALLATION & OWNERS MANUAL |7
Fig. 8
3.2.4 Mounting of Injection Valve
Choose a mounting location on your pipework that is:
1. Prior to your salt cell
2. AFTER the placement of the probe clamp
3. Ensure the probe clamp lead is within reach of the pH
pump controller.
Pierce the top wall of the pipe work through the clamp:
- Ø 8mm for the injection valve
Fig. 9
Put Teflon tape
on threads
I
3.2.5 Mounting of the Tube into the
Injection Valve
Nut
The PVC tube
Nipple
Fig. 10
The hydraulic hose is placed in the same way on the foot
filter and on the pump.
1. Slide the tube through the nut
2. Put the tube at the bottom of the conical nipple
3. Screw the nut by hand onto the nipple
4. CONNECTING THE POWER AND POOL PUMP TO YOUR PH CONTROLLER
Connection diagram for the Henden pH Dosing Pump
The Henden pH Dosing Pump system should ideally be plumbed and connected up as shown in the diagram below.
If your pool pump is plugged into
your Chlorinator:
1. Remove the pump plug from
the Chlorinator pump power
socket. (Usually at the bottom
of the Chlorinator)
2. Plug the 3 pin male piggy back
plug on your pH pump into the
Chlorinator pump power socket.
3. Plug your pool pump into the
female piggy back socket on
the back of the pH pump
power socket.
Flow
Flow
Henden
Chlorinator
NB: The pH probe must be located
before a heater or an electrolyser.

8|HENDEN INSTALLATION & OWNERS MANUAL
Henden pH Dosing Pump Owners Manual
OWNERS MANUAL
5. COMMISSIONING AND OPERATION
5.1 Calibration Procedure
This operation is used to set the sensor response reading
of the pH and peristaltic pump.
Before carrying out the calibration of the probe, remember to:
• Stop the filtration pump
• Close the isolation valves, if fitted
• Remove the probe from the probe holder
• Put the shutter washer (fig. 12) in to close off the hole in the
probe holder
• Open the isolation valves, if fitted
• Turn on the filtration pump and check that the ON/OFF switch
(I/O) of the pump is switched to “I”
• Carry out the calibration of the probe and repeat the previous
actions to put the probe back in place. As described in 3.2.3
Nut
Disk brake
Washer seat
Shutter Washer
O-ring
Fig. 11
5.2 Important Points
• To ensure the probe signal remains as accurate as possible,
please follow the procedure as listed below during the
commissioning of the pool and every 3-4 weeks thereafter,
or as required.
• The procedure is renewed in case of abnormal consumption of
chemicals.
1. Remove the protective cap of the probe and keep it for
reuse at the time of winterising.
Probe
Protective
Cap
2. Rinse the probe in tap water for at least 20 minutes.
3. Next immerse the probe in the pH 7 solution, stir around
in bottle and leave it in the solution being careful not to
touch the probe or the cable.
4. After a period of at least one minute, the stabilised
value is displayed. Press the CAL button until the display
shows CAL flashing then release. The quality of the
probe reading is then briefly displayed.
CAL
SET
pH -
5. The calibration of the Henden pH Dosing Pump is
completed: It is now ready to measure the pH of
your pool.

Henden pH Dosing Pump Owners Manual
HENDEN INSTALLATION & OWNERS MANUAL |9
5.3 Settings
Functions Factory Settings
Unit of measure pH
Set point 7.4
Type of regulation Acid- reduce the pH by dosage of an
acid (pH-)
pH 7 calibration To an accuracy more than 0.2 pH
Proportional regulation* Factory function
*Proportional: Dosage adjusted according to different
cycles time/breaks. At the approach of the set point, the
pump reduces its time of dosing.
5.3.1 Adjustment of the Set Point
CAL
SET
pH -
Pressing the SET button displays the current set point value.
CAL
SET
pH -
To change the value of the set point, press SET and press
CAL by pulse. Each pulse changes the pH value by 0.1 pH,
between 7.0 and 7.6.
5.4 Operating Principle
The Henden pH Dosing Pump adjusts its dosage in
proportion to the demand. It will dose less if the displayed
measure is near the set point. In normal operation, the
pump will increase its ‘non operational’ time period
proportional to the required dosage demand. That is why
the device often has the pump off. This is normal.
Adjust the pH slowly to preserve the natural quality of
your water.
After 30 minutes without pressing the keys, the backlight
turns off to save energy. A short press on SET or CAL
turns it on again.
6. MAINTENANCE
6.1 Replacement of the Peristaltic Tube
Follow steps 1 to 9 as shown.
1.
5.
9.
Fig. 13
2.
6.
3.
7.
4.
8.

10 |HENDEN INSTALLATION & OWNERS MANUAL
Henden pH Dosing Pump Owners Manual
6.2 Maintenance of the Peristaltic Tube
and Roller Holder
The Henden pH Dosing Pump uses a roller holder and
a “squeeze” tube to pump the acid into the pool. This
tube is perishable and must be replaced periodically. We
recommend replacement approximately once per year.
The tube should be visually inspected regularly for leaks
or damage. It is recommended that the roller holder be
periodically inspected and replaced every 2 years.
6.3 Maintenance of the Probe
Over time, in addition to the normal wear of the probe,
according to use and water quality that is more or less
calcareous, measurement will deteriorate. A thin layer of
limestone with other elements present in the pool water
will deposit on the sensing element of the probe. For
assistance in overcoming this issue, please contact:
1300 HENDEN (1300 436 336).
6.4 Controller Wintering
Only in areas where subzero temperatures are experienced
• During winterising, you must protect the peristaltic tube.
• It is advisable to remove the peristaltic tube and flush
it with fresh water. Once complete ensure the tube is
completely dry and re-install.
6.5 Probe Wintering
• During winterising, the probe must be removed from of the
installation and pipe work.
• The protection cap as shown on page 8, must be filled with
fresh water a 1/3 of the way up.
• Place the probe into the protection cap and water and store
in a safe place until after the winter period is over. (Re-
install as shown on page 8.
7. TROUBLE SHOOTING
Error Reasons How to solve it
CAL Err
If this error is
displayed during the
calibration phase and
cycle it is as a result
of:
1. Your pH probe
is not working
properly
2. Your buffer
solution is polluted
3. You have water/
oxidisation in the
probe connector
1. Change the probe
2. Change the buffer
solution
3. Change over the
probe
Alarm Alr Err
If the pH is lower
than pH 5 or above
pH 9, this alarm
will be displayed
and dosing will be
stopped.
Adjust your water
parameter manually
so that it comes back
to the required value
of these parameters:
- Total alkalinity
- TH (hardness)
- pH
The dosing pump will
restart as soon as the
pH reading
If trouble persists, please contact Henden (1300 HENDEN) or
your local Reece Irrigation & Pools branch. For assistance in
locating your nearest branch visit reece.com.au/storefinder

Henden pH Dosing Pump Owners Manual
HENDEN INSTALLATION & OWNERS MANUAL |11
HENDEN™REPAIR OR REPLACEMENT
GUARANTEE
Our goods come with guarantees that cannot be
excluded under the Australian Consumer Law. You are
entitled to a replacement or refund for a major failure
and compensation for any other reasonably foreseeable
loss or damage. You are also entitled to have the goods
repaired or replaced if the goods fail to be of acceptable
quality and the failure does not amount to a major failure.
Should you experience any difficulties with your Henden
product, we suggest in the first instance that you contact
the installer of the product or your local Reece Irrigation
& Pools branch.
Alternatively you can phone Henden. On receipt of your
claim, Henden will seek to resolve your difficulties, if the
product is faulty or defective, advise you on how to have
your Henden product repaired, obtain a replacement or
a refund.
Henden does not cover normal wear or tear, or damage
resulting from misuse or negligent handling, improper
use for which the product was not designed or advertised,
failure to properly follow the provided installation and
operating instructions, failure to carry out maintenance,
corrosive or abrasive water or other liquid, lightning or
high voltage spikes, or unauthorized persons attempting
repairs. Where applicable, your Henden product must
only be connected to the voltage shown on the nameplate.
Henden does not cover freight or any other costs incurred
in making a claim. Please retain your receipt as proof
of purchase; you MUST provide evidence of the date of
original purchase when making a claim.
Henden shall not be liable for any loss of profits or any
consequential, indirect or special loss, damage or injury
of any kind whatsoever arising directly or indirectly from
Henden products.
Should your Henden product require repair or service after
the guarantee period; contact your nearest Reece Irrigation
& Pools branch or phone the number below.
For a complete list of Reece Irrigation & Pools branches
visit our website reece.com.au/storefinder or contact:
TECHNICAL AND AFTER SALES SUPPORT:
1300 HENDEN (1300 436 336)
MAILING/MANUFACTURER ADDRESS:
Davey Water Products
6 Lakeview Drive, Scoresby,
Victoria, 3179
Henden Guarantee Period
Two Years

P/N 403229-2