EZChem - Dosing pump HAYWARD - Free user manual and instructions

Product Type	Pool Dosing Pump
Brand	Hayward
Model	EZChem
Supply Voltage	230 V~ 50 Hz
Power	12 W (EZ-Chem only) / 18 W (with ORP kit)
Protection Rating	IP65
Pump Flow Rate	1.5 L/h
Maximum Pressure	1.5 bar
Maximum Pool Volume	90 m³
pH Measurement Range	6.0 to 9.0 pH
ORP Measurement Range	0 to +1000 mV
Measurement Accuracy	±0.1 pH ; ±10 mV
Main Functions	Automatic pH regulation and optionally liquid chlorine (via ORP kit)
Treatment Modes	pH only, Redox only, pH+Redox
Flow Detector	Yes, integrated (parameter must be set to On)
Probe Calibration	pH probe: buffer solutions pH 7 and pH 4 ; ORP probe: 465/468 mV solution
Corrective Product Type	Acid (pH-) or alkaline (pH+)
Materials	Plastic housing, PVC and PE tubes
Maintenance	Regular cleaning of probes, checking of hoses, use of original parts
Protection and Safety	IP65, automatic shutdown in case of fault, mandatory flow detector, use of original Hayward parts
Warranty	2 years against manufacturing defects (excluding wear parts)

Frequently Asked Questions - EZChem HAYWARD

How to install the EZChem?

Installation must be carried out by a qualified electrician. Mount the housing on the wall in a dry, ventilated technical room, at least 3.5 m from the pool. Install the flow detector on the return pipe, upstream of the injection. The probes must be vertical, cable upwards, and always kept humid. The injection of products is done last on the return line.

How to calibrate the pH probe?

Rinse the probe with tap water. Dip it into the pH 7 buffer solution, then hold the - button until the calibration menu appears. Follow the on-screen instructions (press CAL Enter, wait 60s). Repeat with the pH 4 solution. Quality should be 100%.

How to calibrate the ORP probe?

After calibrating the pH probe, dip the ORP probe into the 465/468 mV calibration solution. Press CAL Enter, wait 60 seconds. Quality should be 100%. Use unexpired solutions.

What does the flashing 'Debit' alarm mean?

This indicates insufficient or no water flow. Check that the filtration pump is running, the valves are open, and the flow detector is correctly installed. The fault clears automatically when flow is restored.

What to do in case of 'AlrOFA pH' alarm?

This alarm means the pH has not reached the setpoint within the allotted time. Check the acid level, the condition of the injection hose, and the operation of the peristaltic pump. You can increase the alarm time or press CAL Enter to clear it.

How to change the treatment mode?

Press CAL Enter and Esc SET simultaneously for 5 seconds to access settings. Navigate to the treatment mode setting and choose between pH Mode, Redox Mode, or pH+Rx Mode (the latter requires the ORP kit). Confirm with CAL Enter.

How to set the pH set point?

From the configuration settings, press the down arrow 3 times to reach 'pH Setpoint'. Use the up/down arrows to set the ideal value between 7.2 and 7.6, then confirm with CAL Enter.

How to prime the pumps?

To prime the pH pump, hold down the '+' button. For the chlorine pump (ORP option), hold down the '-' button. This purges air and starts injection.

How to restore factory settings?

Turn off the device, then turn it back on while holding the '+' and '-' buttons simultaneously. The 'R.A.Z Defaut Oui' menu appears, press CAL Enter to confirm. Factory configuration is restored.

What chemicals to use?

Use products suitable for pool treatment: hydrochloric acid or dry acid to lower pH, and bleach or liquid chlorine for disinfection (if ORP kit). Respect recommended concentrations: free chlorine 1-3 ppm, pH 7.2-7.6.

USER MANUAL EZChem HAYWARD

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HAYWARD®

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GUIDE DE L'UTILISATEUR

OWNER'S MANUAL

MANUAL DEL USUARIO

ANWENDERHANDBUCH

MANUALE D'USO

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HAYWARD®

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EZ-CHEM™

GUIDE DE L'UTILISATEUR

CONSERVEZ CE MANUEL POUR UNE CONSULTATION ULTÉRIEURE

M O F E L G H pH 7 pH 4 A B C D N HAYWARD

A HAYWARD Discope B C D N ORP 465 468 F E L G K H

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HAYWARD®

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EZ-CHEM™

OWNER'S MANUAL

SAVE THIS OWNER'S MANUAL

WARNING: Electrical Hazard. Failure to follow instructions can result in serious injury or death. FOR USE WITH RESIDENTIAL SWIMMING POOLS

WARNING – Carefully read the instructions that appear in this manual and on the device. Failure to comply with the instructions can cause injuries. This document must be given to every pool user who should keep it in a safe place.

⚠ WARNING – All electrical connections must be carried out by a qualified approved electrician in accordance with the standards currently in force in the country of installation.

F NF	C 15-100 GB BS7671:1992
D DIN VDE 0100-702 EW SIST HD 384-7-702.S2
A ÖVE 8001-4-702 H MSZ 2364-702:1994 / MSZ 10-533 1/1990
E	UNE 20460-7-702 1993, REBT ITC-BT-31 2002		M	MSA HD 384-7-702.S2
IRL	IS HD 384-7-702		PL	TS IEC 60364-7-702
I	CEI 64-8/7		CZ	CSN 33 2000 7-702
LUX	384-7.702 S2		SK	STN 33 2000-7-702
NL	NEN 1010-7-702		SLO	SIST HD 384-7-702.S2
P RSIUEE		TR TS		IEC 60364-7-702

⚠ WARNING – Check that the device is plugged into a 230 V socket, protected against short-circuits. The device must also be powered via an isolating transformer or a residual current device (RCD) with a nominal operating residual current not exceeding 30 mA.

WARNING – Check that the supply voltage required by the product corresponds to the voltage of the distribution network and that the power supply cables are suitable for the product power supply.

⚠ WARNING – To reduce the risk of electric shock, do not use an extension cable to connect the device to the mains. Use a wall socket.

WARNING – The device must not be used if the power cord is damaged. An electric shock could occur. A damaged power cord must be replaced by the after-sales service or similarly qualified persons to avoid danger.

⚠ WARNING – Unplug the device from the mains supply before any intervention.

⚠ WARNING – Ensure that children cannot play with the device. Keep your hands and any foreign object away from openings and moving parts.

WARNING – The device must not be used, cleaned or maintained by children over eight years of age or people with reduced physical, sensory or mental abilities or lack of experience or know-how until they have received appropriate instructions and without adequate supervision by a responsible adult to ensure safe handling and avoid any risk of danger. This device must remain out of the reach of children.

WARNING – Chemicals can cause internal and external burns. To avoid death, serious injury or damage to equipment: Wear personal protective equipment (gloves, goggles, mask, etc.) when servicing or maintaining this device. This device must be installed in an adequately ventilated place.

⚠ WARNING – Use only original Hayward parts. ONLY HAYWARD GENUINE REPLACEMENT PARTS

REGISTRATION

Thank you for choosing Hayward. This manual contains important information regarding the operation and maintenance of your product. Please retain it for reference.

TO REGISTER YOUR PRODUCT IN OUR DATABASE, GO TO:

www.hayward.fr/en/services/register-your-product

For Your Records

Record the following information for your convenience:

1) Purchase Date
2) Complete Name
3) Address
4) Zip code
5) Email Address
6) Part number ____ Serial number ____
7) Pool Dealer
8) Address
9) Zip code ____ Country ____

Note

GENERAL

EZ-Chem is a device for regulating the pH of your pool.

With the addition of an ORP kit (optional), it can also regulate both the pH and the liquid chlorine injection to provide you with a complete treatment.

EZ-Chem can treat pools up to 90 m ^4 .

INSTALLATION

Disconnect the pool filter pump before starting the installation. The installation must be carried out in accordance with the standards currently in force in the country. The control box must be mounted a minimum horizontal distance of 3.5 m (or more, if required by local regulations) from the pool and within 1 m of a protected outlet.

Preparing the water in the pool

To prepare the pool water, its chemical composition must be balanced. Certain adjustments to the chemical balance of the pool can take several hours. It is therefore necessary to start the procedure well before switching the unit on.

Chemical water balance

The following table summarizes the concentrations recommended by Hayward. It is important to maintain these concentrations to prevent surface corrosion or deterioration and to derive full benefit from your pool. Control your water regularly. Your authorized Hayward dealer or pool suppliers will provide you with the chemicals you need, together with instructions on how to use them, to adjust the chemical balance of the water in your pool.

CHEMISTRY RECOMMENDED CONCENTRATIONS

Free chlorine 1.0 to 3.0 ppm
pH 7.2 to 7.6
Cyanuric acid (Stabiliser)	20 to 30 ppm (preferably 25 ppm)Only add stabiliser if necessary
Total alkalinity 80 to 120 ppm
Water hardness 200 to 300 ppm
Saturation index -0.2 to 0.2 (preferably 0)

Saturation index

The saturation index (Si) gives us information about the calcium content and alkalinity of the water; it is a water balance indicator. Your water is correctly balanced if the Si is 0 ± 0.2 . If the Si is below -0.2, the water is corrosive and the coating on the pool walls may be damaged. If the Si is above +0.2, stains may appear. Use the following table to determine the saturation index.

Use: Measure the pH of the pool water, the temperature, the water hardness and the total alkalinity. Use the table above to determine Ti, Ci and Ai in the above formula. If the Si is equal to 0.2 or more, stains may appear. If the Si is equal to -0.2 or less, corrosion or deterioration may occur.

CORROSION

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Composition

EZ-Chem

M O F E L G H pH 7 pH 4 A B C D N HAYWARD

A E Z-Chem housing

B T transparent PVC suction hose(4 m ∅4x6).

C Semi-rigid white PE injection tube(5 m ∅4x6).

D Installation kit(Check that screws are included)

E Injection valve (3/8" GAS).

F pH probe

G Probe holder

H 3 x saddle clamps for acid injection, flow switchand pH probe.

I pH 7 and pH 4 buffer solutions

L Injection valve reducers

M Flow switch

N Suction tube ballast

O Fixing plate

ORP kit for EZ-Chem (optional)

A B C D N ORP 465 468 F E L G K H

A P	Peristaltic pump housing
B T	Transparent PVC suction hose(4 m ∅4x6).
C S	Semi-rigid white PE injection tube(5 m ∅4x6).
D	Installation kit(Check that screws are included)
E	Injection valve (3/8" GAS).
F	ORP Probe (Redox).
G	Probe holder
H 2	x saddle clamps for acid injection and ORP probe.
I	ORP 465 / 468 calibration solution
K	Fixing plate.
L	Injection valve reducers
N	Suction tube ballast

HAYWARD®

Installation

EZ-Chem only for pH regulation

graph LR
    A["From pool"] --> B["Pump"]
    B --> C["Filter"]
    C --> D["pH probe"]
    D --> E["Heater"]
    E --> F["Flow switch"]
    F --> G["Acid injection"]
    G --> H["230V~50Hz"]
    H --> I["Back to pool"]
    I --> J["Pool"]
    style A fill:#f9f,stroke:#333
    style J fill:#bbf,stroke:#333

EZ-Chem with an ORP kit for pH regulation and liquid chlorine injection.

graph TD
    A["From pool"] --> B["Pump"]
    B --> C["Filter"]
    C --> D["ORP probe"]
    D --> E["pH probe"]
    E --> F["Heater"]
    F --> G["Chlorine injection"]
    G --> H["Back to pool"]
    H --> I["Chlorine"]
    I --> J["Acid injection"]
    J --> K["25 cm Flow switch"]
    K --> L["Chlorine"]
    L --> M["230V~50Hz"]
    M --> N["230V~50Hz"]
    style A fill:#f9f,stroke:#333
    style B fill:#f9f,stroke:#333
    style C fill:#ccf,stroke:#333
    style D fill:#cfc,stroke:#333
    style E fill:#fcc,stroke:#333
    style F fill:#cff,stroke:#333
    style G fill:#ffc,stroke:#333
    style H fill:#cfc,stroke:#333
    style I fill:#fcc,stroke:#333
    style J fill:#ffc,stroke:#333
    style K fill:#cfc,stroke:#333
    style L fill:#fcc,stroke:#333
    style M fill:#cfc,stroke:#333
    style N fill:#fcc,stroke:#333

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WARNING – Chemicals can cause internal and external burns. To avoid death, serious injury and/or damage to equipment: Wear personal protective equipment (gloves, goggles, mask, etc.) when servicing or maintaining this device. It must be installed in an adequately ventilated room.

Mount the box (or both boxes if the ORP option is chosen) on the wall using the mounting kit supplied. The box must be installed in the equipment room (dry, temperate, ventilated). Caution, acid vapours and/or chlorine can cause irreversible damage to your device. Position the treatment product tanks accordingly.

Technical diagram showing brick wall installation components with labeled parts and a directional arrow indicating assembly or inspection.

The flow switch must be installed on the return pipe directly in line with and upstream of the treatment product injection point. Allow a 25 cm straight section before the flow switch. A hole should previously have been drilled in the pipe to allow the flow switch to pass through. Screw the flow switch (M) into the saddle clamp (H) taking care to seal with Teflon. Then install the clamp on the pipe. The flow switch must be installed in the direction of operation to ensure that it is tripped by the flow from the filter pump.

The probes must be installed on the filter outlet pipe to protect them from debris. A hole should previously have been drilled in the pipe to allow the probe to pass through. Fix the saddle clamp and install the probes in the clamp (H) with the probe (G) provided for this purpose. For the probes to operate, they must be vertical, with the cable upward. The probes must always remain wet. If the probes are allowed to dry, they will be permanently unusable (not covered by the warranty).

The treatment products must be injected last over the water return line, after any equipment (heater, etc.). A hole should previously have been drilled in the pipe to allow the treatment product to pass through. Install the saddle clamp (H) and screw the injection valve (E) into the saddle clamp using the adapter (L) provided. Seal with Teflon.

Connect the pH probe to the corresponding BNC connector.

Connect the ORP/RedoX probe to the corresponding BNC connector (if the ORP option is chosen).

Technical specifications

Supply voltage	230 V 50 Hz
EZ-Chem power 12 W
EZ-Chem power + ORP kit 18 W
Safety rating IP65
Pump delivery rate 1.5 l/h
Maximum pressure 1.5 bar
Max pool volume 90 m	3
pH measuring ranges 6.0 to 9.0 pH
ORP measuring ranges 0 to +1000 mV
Measuring accuracy	± 0.1pH; ± 10mV

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Electrical connection:

CPU L N To liquid chlorine peristaltic pump (option) 230V~ 50Hz

1 BNC connector for the pH probe
2 BNC connector for the ORP probe. Must only be connected if the ORP option is chosen (the probe is in the ORP kit).
3 Empty container sensor connection (optional).
4 Liquid chlorine peristaltic injection pump connection (only if the ORP option is chosen).

Connect the phase of terminal block 6 to the right-hand terminal of terminal block 4 to perform the bridging. Connect the neutral of the peristaltic pump to the neutral of terminal block 6 and connect the phase to the left-hand terminal of terminal block 4.

5 Flow switch connection. Only the blue and brown wires should be connected. Do not connect the black wire.
6 Main power supply connection (230 V\~ 50 Hz) in conformance with the local standard currently in force.
7 On/Off switch located on the right-hand side of the box.

CONFIGURATION

HAYWARD® Used to select a menu or confirm a selection Used to cancel or exit a menu Used to increase a value or navigate up a menu Used to reduce a value or navigate down a menu

To configure the device, simultaneously press CAL and Esc for 5 seconds to display the following screen.

Program Configuration

Setting the language:

Program Configuration

press then

twice, then enter using .

Select the language using or and confirm with .

Setting the flow switch

Program Configuration

press then and enter using .

The parameter must be set to On. This parameter must never be set to OFF.

⚠ WARNING – injecting a treatment product when the filter pump is stopped can cause irreversible material damage and/or serious injuries.

HAYWARD®

Setting the treatment mode

This device is used to set:

• pH only: pH mode
• disinfectant only (ORP): Redox mode
• both pH and disinfectant (ORP): pH + Rx mode

The Redox or pH+Redox mode can only be activated with the ORP option sold separately. If you do not have the ORP option, please set the device to pH mode only.

To select the treatment mode:

Program Configuration

press then enter using

Select the treatment mode using or and confirm with .

Setting the pH set point

The device must be in pH mode or pH+Rx mode.

Program Configuration

press three times then enter using .

Set the pH set point using or and confirm with .

Ideally, the pH must be set to between 7.2 and 7.6.

Setting the ORP set point (only with the ORP option)

The device must be in pH+Rx mode.

Program Configuration

press five times then enter using .

Set the ORP set point using or and confirm with .

Ideally, ORP must be set to between 650 and 850.

Note: press twice only in "Redox" mode to set the ORP set point.

Priming the pumps

Hold down the button to prime the pH pump.

Hold down the button to prime the disinfectant (Chlorine) pump (only with the ORP option).

HAYWARD®

Calibrating the probes

pH probe

Use pH 7 and pH 4 buffer solutions (check expiry date).

Rinse your probe with tap water before immersing it in the pH 7 solution.

Hold down the button until the Pump Calibration pH Probe Cal. menu appears, then confirm with CAL Enter

The Press CAL B.Solut. 7pH menu appears.

Soak your probe in the pH 7 buffer solution and press CAL Enter

Wait until the countdown finishes (60 s) and the Quality 100% B.Solut. 7pH screen appears.

If the quality of the measurement is not 100%, repeat the calibration or replace the probe.

Rinse your probe with tap water before immersing it in the pH 4 solution.

Press the button.

The Press CAL B.Solut. 4pH menu appears.

Soak your probe in the pH 4 buffer solution and press

Wait until the countdown finishes (60 s) and the Quality 100% B. Solut. 4pH screen appears.

If the quality of the measurement is not 100%, repeat the calibration or replace the probe.

ORP Probe (Only with the ORP option)

Use the 465 / 468 mV calibration solution (check expiry date).

Rinse your probe with tap water before immersing it in the 465 / 468 mV solution.

Press when the calibration of the pH probe is finished.

When the following screen appears Pump Calibration Rx Probe Cal., confirm with CAL Enter

The 465 mV Press CAL menu appears.

Soak your probe in the 465 / 468 mV calibration solution and press

Wait until the countdown finishes (60 s) and the Quality 100% B.Solut. 465 mV screen appears, then confirm with CAL Enter

If the quality of the measurement is not 100%, repeat the calibration or replace the probe.

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HAYWARD®

Full configuration overview - Review of the different parameters

On the Program Configuration screen, press

pH OFA Time Off

press to set the time after which the device will go into alarm mode if the pH set point has not been

reached (OFA). Select the time (or off by default) using or and confirm with .

Press to obtain pH Setpoint Type Acid and press to set the type of corrective product (acid (pH-) or alkaline (pH+)), then confirm with CAL Enter

Press to obtain pH Setpoint 7.4ph and press to set the pH set point using or and confirm with . Ideally, the pH must be set to between 7.2 and 7.6.

If you have connected the ORP kit (pH + Rx mode), press to obtain RX OFA Time Off and press to

set the time after which the device will go into alarm mode if the ORP (Redox) set point has not been reached (OFA). Select the time (or off by default) using or and confirm with . CAL Enter

Press to obtain RX Setpoint 750 mV and press to set the ORP (Redox) set point using or and confirm with . Ideally, ORP must be set to between 650 and 850.

Restoring the factory settings

Switch the device off and then on again by pressing the and buttons simultaneously.

The Init. Default Yes menu appears. Press to confirm.

The device is now in its factory configuration.

The factory configuration is as follows:

Treatment mode: pH only

Language: French

pH set point: 7.4

Type of corrective product: Acid

pH OFA alarm: Off

Flow switch: On

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Troubleshooting guide

As most malfunctions are related to a poor water balance, we advise you to check it before handling the product (see chemical water balance).

Alarm text Possible	causes Recommendation Action
"Flow" flashing Insufficient flow or no flow		Check the operation of the flow switch; if the contact is closed, "FLOW" remains steady, otherwise it flashes.	The fault automatically disappears once the problem is resolved
		Check that the filter pump is working correctly
		Check the operating periods on the programming clock
		Ensure that all the valves are open
		Ensure that the water flows freely in the pipes
OFA Alr (pH)	Setting time too low	Increase the pH OFA alarm time (20 minutes to 240 minutes)	Press CAL Enter to remove the faultOr set the pH OFA alarm to OFF.
	Acid container empty Replace the acid container
	Rigid injection pipe blocked or pinched inspect the acid injection pipe, replace if necessary
	Peristaltic pump problem	Check pump operation, press the (+) button to force it to operate, replace the pump if faulty
		Inspect the membrane, replace if necessary
	Difficulty reading the pH or unstable pH Check the water balance and recalibrate the pH probe
OFA STOP (pH) pH level not reached after 3 cycle times See recommendation for pH OFA Alarm			Press CAL Enter to remove the fault
OFA Alr (Rx)	Setting time too low	Increase the Redox OFA alarm time (20 minutes to 240 minutes)	Press CAL Enter to remove the faultOr set the Rx OFA alarm to OFF.
	Chlorine container empty	Replace the liquid chlorine container
	Rigid injection pipe blocked or pinched inspect the chlorine injection pipe, replace if necessary
	Peristaltic pump problem	Check pump operation, press the (-) button to force it to operate, replace the pump if faulty
		Inspect the membrane, replace if necessary
	Difficulty to read Redox	Check the water balance and recalibrate the ORP probe
OFA STOP (Rx)	Redox level not reached after 3 cycle times	See Rx OFA Alr recommendation	Press CAL Enter to remove the fault
Parameter error	System error	Restore the default settings	N/A
		Electronic problem, replace the device
Error 7 pH	pH probe calibration problem	Repeat the calibration	The fault automatically disappears once the problem is resolved
	pH probe faulty	Check the pH probe connection with the BNC connector on the housing, inspect the probe and the cable
	pH buffer solution out of date	Obtain a new solution
Error 4 pH	pH probe calibration problem	Repeat the calibration
	pH probe faulty	Check the pH probe connection with the BNC connector on the housing, inspect the probe and the cable
	pH buffer solution out of date	Obtain a new solution
Error 465 mV	Rx probe calibration problem	Repeat the calibration
	Rx probe faulty	Check the connection of the Rx probe with the BNC connector on the housing, inspect the probe and the cable
	Rx buffer solution out of date	Obtain a new solution

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HAYWARD®

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EZ-CHEM™

MANUAL DEL USUARIO

CONSERVE ESTE MANUAL DE INSTRUCCIONES

M O F E L G H pH 7 pH 4 A B C D N HAYWARD

A B C D E F G H I ORP 465 468 K N CHAYWARD Vasconex

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HAYWARD®

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BEWAHREN SIE DIESES HANDBUCH ZUM SPÄTEREN NACHSCHLAGEN AUF

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Für Ihre Unterlagen

KORROSION -0.2 0 0.2 FLECK OK

VERWENDEN SIE NUR ORIGINAL-ERSATZTEILE VON HAYWARD

M O F E L G H pH 7 pH 4 A B C D N HAYWARD

A B C D N ORP 465 468 F E L G H K

Technical diagram showing brick wall installation components with labeled parts and a directional arrow indicating assembly or inspection.

Abstract geometric logo with stylized letter H inside a circular frame (no text or symbols)

HAYWARD®

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MANUALE D'USO

CONSERVARE IL PRESENTE MANUALE PER FUTURA CONSULTAZIONE

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Dati da conservare

M O F E L G H I pH 7 pH 4 A B C D N HAYWARD

A B C D E L G H I N K ORP 465 468

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All HAYWARD products are covered for manufacturing defects or material defects for a warranty period of 2 years as of date of purchases. Any warranty claim should be accompanied by evidence of purchase, indicating date of purchase. We would therefore advise you to keep your invoice.

The HAYWARD warranty is limited to repair or replacement, as chosen by HAYWARD, of the faulty products, provided that they have been subjected to normal use, in compliance with the guidelines given in their user guides, provided that the products have not been altered in any way, and provided that they have been used exclusively with HAYWARD parts and components. The warranty does not cover damage due to frost and to chemicals. Any other costs (transport, labour, etc.) are excluded from the warranty.

HAYWARD may not be held liable for any direct or indirect damage resulting from incorrect installation, incorrect connection, or incorrect operation of a product.

In order to claim on a warranty and in order to request repair or replacement of an article, please ask your dealer.

No equipment returned to our factory will be accepted without our prior written approval.

Wearing parts are not covered by the warranty.

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