Innowater PHRX User manual

MANUAL
Innowater PHRX
Rev.05/19

1
WARNINGS
Before carrying out any installation or maintenance of the pHrx, disconnect it
from the mains power supply.
This appliance is not intended for use by persons (including children) that lack
experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a responsible person.
The installation of this device should be carried out by a qualified person.
The pH-Basic device should be located in the correct pool zone and connected to
supply via a power outlet that is protected by a residual current device (RCD)
having a rated residual operating current not exceeding 30mA.
The power outlet should have a degree of protection suitable for the pool zone
Ensure that equipotential bonding of all parts of the pool installation is carried
out.
During the installation phase of the pHrx, check the following:
• the voltage of the power supply must to the voltage indicated on the
side of the appliance
• the injection point pressure must be lower than 1.5 Bar
• the peristaltic pump's protection cover must be correctly fitted
• the suction tube must be immersed in the corrective solution container
with the suction tube also connected to the peristaltic pump (left side).
• the injection tube must be connected on one side to the peristaltic pump
(right side) and on the other side to the pool return pipe via the injection
valve.
Innowater Tratamientos Integrales del Agua S.L. will not be held liable for the
use of this device with inappropriate products.

2 INNOWATER PHRH
Page
1. Description.............................................................. 3
2. Instalation .............................................................. 4
3. Operating ................................................................ 6
3.1. Main screen ............................................................ 6
3.2. Secondary screen .................................................... 6
3.3. Start up. ON/OFF..................................................... 7
3.4. Start up. Priming and acid level alarm........................ 7
4. pH configuration ..................................................... 9
4.1. Enable / Disable ...................................................... 9
4.2. Setpoints................................................................ 9
4.3-4.4 Probe calibration................................................10
4.5. Factory calibration ..................................................11
4.6. Dosing alarm .........................................................12
5. ORP configuration ................................................. 13
5.1. Setpoints...............................................................13
5.2. ON/OFF mode (with chlorinator)...............................15
5.3. Probe calibration ....................................................15
5.4. Factory calibration ..................................................16

3
1. DESCRIPTION
The pHrx allows you to correct the pH an ORP level of your pool. The device
monitors the pH continuously by means of its pH sensor and sends a dosing signal
to the pump which will, in turn, injects acid in the pool when needed. The device will
control the work of the pump depending on the measurement of the probe and the
setpoints programmed. To avoid excessive dosage related to measuring delays, the
pump will alternate start/pause periods in cycles of 100 seconds.
It also monitors the ORP thanks to its probe and then, when needed, sends a signal
to activate an oxidant doser/producer device.
1. BNC socket for pH probe
2. BNC for pH level probe
3. BNC socket for ORP probe
4. 230 VAC power suplly
5. ORP control cable
6. Connection for suction tube
7. Conection for injection tube
8. LCD Display
9. Buttons
2
1
3
54
8
9
67

4 INNOWATER PHRH
2. INSTALLATION
Controller
Install the device on the wall in easy to access location using the braquet provided.
Before attaching the bracket to the equipment, use the bracket to mark in the wall
the location of the holes you will need to make for the screws. Choose a location
close to the injection point.
pH and ORP probes
Install the probes after the filter and BEFORE the chlorinator cell and as far as
posible from it. Try to choose a point in the circuit that never get empty of wáter,
because the probe deteriorates quickly when dry.
Injection
Install the clamp provided in the return pipe after all other equipment (pump, filter,
heater, chlorinator etc.). It should be the last element on the return line. Install the
injection one way valve on the clamp. Use Teflon tape to seal the thread. Connect
the injection rigid tubbing (opaque) to the valve.
Connect the other end of the injection tube (opaque) to the injection fitting (right
side) of the peristaltic pump.
Suction
Connect the flexible suction tube (transparent) to the injection fitting (left side) of
the peristaltic pump.
Use a length of tube long enough to reach from the acid container to the peristaltic
pump and feed the tube through the black rubber grommet in
the ‘anti-fume’ cap. Once the cap is on the tube, fit the suction filter to the suction
tube and place the suction line into the acid container. Screw the anti fume cap
down into position.
Acid container
We strongly recommend to place the acid container outside the filter shed. If it is
not possible, ensure the adequate ventilation is provided and place the container as
far from metallic and electronic equipment as possible and NEVER underneath the
pump or other device.
Level probe
Attach the end of the cable from level probe that carries the float to the suction
filter using the supplied bracket. Connect the other end of the cable to the BNC
connector of the device. Immerse the suction filter together with the level probe
that you have fixed to into the acid container and make sure that it stands upright
and stable on the bottom. Close the container as good as you can.

5
ORP control cable output
Control cable provides a dry contact to control the device. Depending on the
setpoint configured it can generate a proportional PWM duty cycle or an ON/OFF
signal.
If the device controls a saltwater chlorinator, setpoint must be configured
as an ON/OFF signal.
Connect the cable to the external control input of the chlorinator or use it to activa-
te a relay or other device.
If you use the cable to switch a voltage, do not exceed the following values :
Maximum voltage 230 VAC
Maximum current 1 A

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3. User interface
3.1 Main screen
Main screen shows the following info:
(1) pH measure
(2) Acid dosage percentage, calculated from the setpoints
(3) ORP measure
(4) ORP dosaje percentage, calculated from the setpoints
3.2 Secondary screen
By pushing Λ or V, secondary screen appears:
This screen shows the current status of ORP output and pH pump:
(1) pH Dosing: Pump working to lower the pH value
Pause: Pump paused because of working cycle
Stopped: Pump stopped (pH below or equal to setpoint)
(2) ORP output ON: Closed contact (ORP below of setpoint)
output OFF: Open contact (ORP equal or above setpoint)
To go back to main screen push arrow (Λ or V) key.
1
4
2
pH 7.40 20%
ORP 650 mV 100%
3
2
1
pH dosificando..
ORP output ON

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3.3 Start up— ON/OFF
To turn on the equipment press ON/OFF (MENU) for two seconds. Main screen will
appear.
To turn OFF, from the main screen, press ON/OFF (MENU) for two seconds.
Press Menu to access to the main menu. Use the arrows to scroll the different
functions. Press OK to enter in each sub-menu.
3.4 Start up. Priming pH pump
To start the pump manually press “OK” for two seconds while in the main screen.
Acids are very corrosive and can harm you eyes, skin and airways.
Always wear safety googles, gloves and clothing and provide a safe
means to evacuate the priming acid.
Press OK to stop the priming process, if don´t it will automatically return to main
screen in 60 seconds.
Level alarm (PH pump)
If the float drops down due to a lack of acid in the acid tank, the level alarm will be
activated and the pump will stop dosing. This is indicated by a beep and the
message “EMPTY TANK” on the display.
-Fill the tank and the pump will be activated and working again.
-The manual activation of the pump by means of OK key, keeps on enabled even in
the level alarm.
-If you want to Switch Off the level alarm, simply disconnect the Level probe from
the device.
MENU
pH 7.40 20%
ORP 650 mV 100%
OFF ON/OFF
pH 7.40 20%
ORP 650 mV 100%
MENU PRINCIPAL
1 Config. de pH
MENU
pH 7.40 Dos.20%
Pul. ON
PRIMING
STOP = OK
ON/OFF

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4. PH CONFIGURATION AND CALIBRATION
To access the Configuration Menu, press the OK key from the main screen and
scroll with the help of the arrows.
4.1 Enable/disable pH function
You can enable or disable pH function in menu 1. pH Config.
Push OK to get into pH configuration sub-menu and use arrows to scroll through
the options:
To access the pH Activation Menu, press the OK key.
Use arrows Λ o V to choose and press OK
4.2 Setpoint configuration
Enter with the OK key. It will show the following screen:
The calculation of the dosage is made by establishing the two set points, A and B,
and the relative volume of dosage that is required in each of these points.
- When the pH is below the lower set point, the pump will not dose acid.
- When the pH is between both points, the chlorinator will send a proportional
signal defined by both points. For example, in the case of the figure, if the pH is at
8 the pump will dose at 40%.
MAIN MENU
1 pH config
PH config
1 pH activation
PH function
ACTIVATED
OK
Configuration PH
2 Setpoints
A: pH 7.0 10%
B: pH 9.0 90%

9
- When the pH is above the upper set point, the pump will dose to the fixed volume
defined for the upper point. In the case of the figure, 90%.
You can set both points and choose the percentage of dosage for each of them. To
do this, press the cursor with the MENU key in the parameter you want to modify
and act with the arrows to change the value.
Press OK to save the data and exit the sub-menu.
By choosing the set points you will be defining at the same time the required dosing
volume and the response delay after dosing, both of them depending on the size of
your pool. For example, if your pool has a high volume you should establish high
percentages of dosing. The response time in the pH measurement of your pool can
be considered when setting point A of the setpoint, stopping the dosage before
reaching the desired pH value. For example, to obtain a pH = 7.0 and avoid
overdosing, set the dosage stop in a higher value:
A: pH 7.2 0%
Each pool needs more or less acid, as they are more or less reactive to the dosage,
at the beginning at least, you may need to correct the set points several times.
A: pH 7.0 10%
B: pH 9.0 90%

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4.3 y 4.4 pH probe calibration
The pH probes require a calibration before their first use and then they need to be
calibrated periodically. It is because different probes can have different answers
and because the response of the same probe inevitably varies with time. The
calibration consists of measuring the response of the probe introducing it in two
buffer solutions and recording this response in order to deduct the pH of any other
solution, in our case, the pH of the pool water.
The calibration of the probe is carried out using the two buffer solutions supplied
(pH4 and pH7) and entering the submenus "3 Cal pH4" and "4 Cal pH7"
respectively.
Enter the sub-menu 3 Cal pH 4 by pressing OK key, it will show the following
screen:
The value on the left (Lec:): indicates the current pH value measured by the
probe.
The value on the right indicates the value of the buffer pH4 solution. You can
adjust this value using the arrows to adapt it to the temperature and the sample
used.
Insert the probe in the buffer solution at pH 4, remove it slightly with the probe
and wait for a stable reading value to be reached.
Once the reading value has stabilized press the OK key to save the calibration and
exit the sub-menu.
Next, remove the probe from the buffer solution pH 4, rinse its bottom with clean
water and shake gently to remove excess water.
Repeat the above process with the buffer solution pH 7 and submenu 4 Cal pH 7.
Note: If in the pH calibration process, the measure valued of the probe, Lec,
differs by more than 2 units from the theoretical value of the buffer solution (pH4
or pH7), the calibration of that point won´t be saved and it will go back to Factory
values.
For example, if when calibrating with the pH4 solution the reading value, Lec,
indicates 6.05, the calibration won´t be saved and the value 4.00 will be
maintained.
pH configuration
3 Cal pH 4
pH configuration
4 Cal pH 7
Calibration pH 4
Lec: 4.05 4.00

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4.5 Factory calibration
The submenu 5 Factory calib, gives you the possibility to reset general calibration
parameters that correspond, approximately, with those of a new probe and which
are the ones programmed by the chlorinator from factory values. This can be useful
if you have saved successive calibrations and do not have the buffer solutions for a
correct calibration.
Press OK key to enter the sub-menu 5 Factory calib, it will show the following
screen:
Press OK key to set Factory values or MENU to Exit.
4.6 Dosing alarm
Press OK to ener. To activate or deactivate scroll with arrow keys to choose ON or
OFF. Then press MENU to set the period desired (up to 20 minutes)
Factory calib.?
YES:OK EXIT:MENU
pH configuration
5 Factory calib.
PH Configuration
6 Dosing alarm
Dosing alarm OFF
Max. Dos. 20 min

12 INNOWATER PHRH
5. ORP CONFIGURATION AND CALIBRATION
To access the 2 ORP Config., press MENU key, then scroll with the help of the
arrows.
To enter ORP Activation press OK, choose Activated or Deactivated and press OK.
ORP control cable output
The control cable provides a voltage-free contact between its two wires. Depending
on the configuration of the setpoints this contact can generate a signal with a
variable work cycle (PWM) proportional to the measurement, or an ON/OFF signal.
To use this cable to control a Chlorinator, configure the output in ON/OFF mode.
Connect the cable to the external control input of the Chlorinator or connect it to
operate with a relay or other device.
If you use the cable to switch a voltage, do not exceed the following values:
Maximum admissible voltage 230 VAC
Maximum admissible current 1 A
If percentage, when calculated, is different of 0% or 100%, contact will open and
close according to a variable work cycle (PWM) in cycles of 100 seconds. For
example, if the calculated dosaje is 40%, contact will remain closed (ON) during
first 40 seconds and open (OFF) for the rest 60 seconds.
Current status of this contact is shown permanently on display. When turning on the
device, it will wait for the ORP value to stabilize so, altough dosage is at 100%, ORP
output will remain OFF for a period of time. Also, the device has an hysteresis to
avoid fast changes and rebounds.
MAIN MENU
2 ORP Config.
ORP Config.
1 ORP Activation
Function ORP
ACTIVATED

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5.1 Setpoint
To enter press OK, it will show the following screen:
The calculation of the production is made by setting of two setpoints, A and B, and
the % of production that is desired for each of those points.
- When the ORP is below the lower set point, the signal will work at its maximum
frequency.
- When the ORP is between both points, the chlorinator will send a proportional
signal defined by both points. For example, in the case of the figure, if the ORP is at
675 mV the pump will dose at 50%.
- When the ORP is above the upper set point, the equipment will keep the output
OFF, at 0%.
You can set both points and choose the percentage of dosage for each of them. To
make this, press cursor with the MENU key in the parameter you want to modify
and scroll with the arrows to change the value.
Press OK key to save the data and Exit the sub-menu.
By setting the set points you will be defining at the same time the % of production
desired in each of those points, both dependent on the size of your pool. For
example, if your pool has a high volume you should establish high production
percentages. The response time in the measurement of the ORP of your pool can be
considered when establishing the set point B by cutting the signal before reaching
ORP Config.
2 Setpoints
A: RH 650mV 80%
B: RH 700mV 20%
A: RH 650mV 80%
B: RH 700mV 20%

14 INNOWATER PHRH
the desired ORP value. For example, to obtain an ORP = 750mV and avoid
overproduction, set the dosage cut to a somewhat lower value:
B: ORP 730mV 0%
We recommend to make periodic recalibrations of the ORP electrode.
5.2 “ON/OFF” mode TO WORK WITH A SALT WATER CHLORINATOR
If you set the same ORP value in both points and dosage in A is 100%, output will
behave as a “ON/OFF” signal:
- When ORP is below the value, output will remain ON (closed contact)
- If ORP is above the value, output will remain OFF (open contact)
5.2.1 To work with a domestic INNOWATER salt water chlorinator, you
have to set the following parameters in the chlorinator:
Enter “Control Ext” in the main menu:
A: ORP 650 100%
B: ORP 650 0%
MAIN MENU
5 Control Ext
MENU CONTROL EXT
1 ON/OFF
OK

15
Activate external control:
In “2 mode”, choose the option “Open = active”:
In “3 Production”, set 0%:
This way, when chlorinator receives the order to produce chlorine, it will do it at the
percentage chosen from the main screen. If the order is not to produce, it will
remain at 0%.
5.3 Probe calibration
The ORP probes require a calibration before their first use and then they need to be
calibrated periodically. It is because different probes can have different answers and
because the response of the same probe inevitably varies with time.
The calibration consists of measuring the response of the probe introducing it in two
buffer solution and recording this response in order to deduct the ORP (RH) of any
other solution, in our case, the ORP (RH) of the water in the pool.
The calibration of the probe is carried out using a buffer solution supplied (220mV)
and entering the sub-menu "3 ORP Calib.”.
Enter the sub-menu 3 ORP Calib. by pressing OK key, it will show the following
screen:
MENU CONTROL EXT
1 on /off
External control
ACTIVATED
OK
MENU CONTROL EXT
2 Mode
Mode
Open = active
OK
MENU CONTROL EXT
3 Production
Production if
active 0%
OK
ORP configuration
3 Cal ORP
ORP Calibration
Lec: 400mV 220

16 INNOWATER PHRH
The value on the left (Lec:): indicates the current ORP (RH) value measured by the
probe. The value on the right, indicates the value of the buffer solution (220mV).
You can adjust this value using the arrows to adapt it to the temperature and the
sample used.
Insert the probe in the buffer solution 220mV, remove it slightly with the probe and
wait for a stable reading value to be reached.
Once the reading value has stabilized press OK key to save the calibration and exit
the sub-menu.
Next, remove the probe from the buffer solution 220mV, rinse its bottom with clean
water and shake gently to remove excess water.
5.4 Factory calibration
The submenu Factory calib, gives you the possibility to reset general calibration
parameters that correspond, approximately, with those of a new probe and which
are the ones programmed by the chlorinator from factory values. This can be useful
if you have saved successive calibrations and do not have the buffer solutions for a
correct calibration.
Press OK key to enter the sub-menu 5 Factory calib, it will show the following
screen:
Press OK key to set Factory values or MENU to Exit.
6. Language
Press OK key to enter and scroll with the help of the arrows to choose the desired
language.
Press OK key to confirm and Exit.
7. Contrast LCD
Press OK key to enter and scroll with the help of the arrows to choose the desired
LCD contrast.
Press OK key to confirm and Exit.
MAIN MENU
3 Language
Choose language
English
OK
ORP Config.
3 Factory Cal.
Factory Calib.?
SI:OK EXIT:MENU
OK
LCD Contrast
- ■ ■ ■ ■ +
MAIN MENU
4 LCD Contrast

17