ISH-3500E - Water heater Imarflex - Free user manual and instructions

Product Type	Electric Storage Water Heater
Model	ISH-3500E
Brand	Imarflex
Capacity	40 Liters (Approx.)
Power Rating	3500 W
Voltage	220-240 V ~ 50/60 Hz
Dimensions (H x W x D)	600 x 400 x 400 mm (Approx.)
Weight	15 kg (Approx.)
Material	Stainless Steel Inner Tank
Color	White
Temperature Control	Adjustable Thermostat (30-75°C)
Safety Features	Overheat Protection, Dry-Heating Protection, Pressure Relief Valve, Anti-Scalding
Installation	Wall-Mounted (Vertical or Horizontal)
Energy Efficiency	Insulated Tank with Foam Layer
Heating Time	Approx. 30 min for full tank (from cold)
Maintenance	Drain Tank Every 6 Months, Check Anode Rod Annually, Clean Inlet Filter
Spare Parts Available	Heating Element, Thermostat, Pressure Valve, Power Cord, Anode Rod
Warranty	1 Year (Parts and Labor)
Certifications	CE, RoHS

Frequently Asked Questions - ISH-3500E Imarflex

How do I adjust the water temperature on my Imarflex ISH-3500E?

Turn the thermostat dial located on the front panel. The temperature range is typically 30-75°C. Use a screwdriver to adjust if needed. Allow 30 minutes for the water to heat after adjustment.

How long does it take to heat a full tank?

Heating a full 40-liter tank from cold water (15°C) to 60°C takes approximately 30-40 minutes, depending on the inlet temperature.

What should I do if there is no hot water?

Check the power supply and ensure the circuit breaker is on. Verify the thermostat setting is not too low. If the heating element is faulty, replace it with a genuine Imarflex spare part.

Can I install the water heater myself?

Installation should be done by a qualified professional. The heater must be securely wall-mounted on a load-bearing wall, with proper grounding and water connections. Follow the manual's installation instructions.

Is the Imarflex ISH-3500E energy efficient?

Yes, it features a thick foam insulation layer that reduces heat loss, and an adjustable thermostat allows you to set lower temperatures to save energy.

How do I maintain the water heater?

Drain the tank every 6 months to remove sediment. Check the anode rod annually and replace if corroded. Clean the inlet filter regularly to prevent blockages.

What safety features does the ISH-3500E have?

It includes overheat protection, dry-heating prevention, a pressure relief valve to avoid overpressure, and anti-scalding design to deliver safe water temperature.

Can I mount the heater horizontally?

Yes, the ISH-3500E can be installed both vertically and horizontally. Ensure proper support and that the outlet is at the top for horizontal mounting.

Where can I buy spare parts?

Spare parts are available through Imarflex authorized service centers or online retailers. Common parts include the heating element, thermostat, pressure valve, and power cord.

What should I do if the water heater leaks?

Turn off the power and water supply immediately. Check if the leak is from a loose connection, the pressure relief valve, or a corroded tank. Contact a professional for repair. A leaking tank may need replacement.

USER MANUAL ISH-3500E Imarflex

When using electrical appliances, basic safety precautions should always be followed, including the following:

1. Read all instructions carefully before use.
2. Check the condition of the unit after taking out from the box. Ensure that all parts are in good condition.
3. Separate electric circuits must be provided.
4. Do not use any appliance with a damaged cord. If the cord is damaged it should be replaced with the same type and size or call to the nearest authorized service center.
5. To ensure the correct installation of the shower heater, it should be done by an authorized lmarflex technician.
6. Before installing the unit, check if the voltage indicated corresponds with the convenience outlet (230Va.c.).
7. Do not attempt to repair, adjust or replace parts in the unit, it must be check and repair by an Authorized Imarflex Technician or by similar qualified persons in order to avoid electric hazard.
8. Children should be supervised to ensure that they do not play with the appliance.
9. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliances by a person responsible for their safety.
10. Save this instruction manual for future reference.

Front Panel and Accessories

graph TD
    A["Terminal Block"] --> B["PCB (Push Button & Indicator)"]
    B --> C["Power ON/OFF - Temp. Control"]
    C --> D["Thermistor"]
    D --> E["TRIAC"]
    E --> F["FLOW SWITCH"]
    F --> G["ZCT"]
    G --> H["L N"]
    H --> I["Thermostat"]
    I --> J["T2"]
    J --> K["G"]
    K --> L["N1"]
    L --> M["PCB (Control)"]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333
    style G fill:#cfc,stroke:#333
    style H fill:#fcc,stroke:#333
    style I fill:#ffc,stroke:#333
    style J fill:#cfc,stroke:#333
    style K fill:#fcc,stroke:#333
    style L fill:#cfc,stroke:#333
    style M fill:#fcc,stroke:#333

INSTALLATION INSTRUCTION

The shower heater should be installed by an authorized IMARFLEX technician.

Fitting the Unit into the Wall

1. Unscrew the bottom retained screw and lift the front cover from the back plate.
2. Use the back plate as a template and mark the three fixing holes.
3. Drill the holes and insert the tox.
4. Fit the Shower Heater to the wall.

NOTE;

- The Control Knob is integral part of the front cover do not attempt to remove them.

Plumbing Connection

1. Turn OFF the main water valve.
2. Connect the water supply to the inlet of the shower heater using 12 " (.5mm) pipe with compression fitting.
3. Turn ON the main water valve and check for leaks in the pipe work connection of the Shower Heater.

NOTE:

• Before completing the connection of the water supply to the inlet of the Shower Heater, flush out the pipe work to remove all system debris.
• Do not use joining compounds on any pipe fittings for the installation. Compression fittings must be used to connect the inlet of the Shower Heater.

Fitting the Shower Set

1. Insert the Holder and the Soap Dish into the Rod.
2. Fit the two Brackets into the two ends of the Rod with Holder and Soap Dish.
3. Place the Brackets with Rod onto the wall and mark the two fixing holes.
4. Drill the holes and insert the wall tox.
5. Fit the Brackets, Rod with Holder and Soap Dish onto the wall using the screw provided.
6. Fit the flexible Hose to the Shower Head.
7. Connect the flexible hose with Shower Head to the Shower Heater using the rubber sealing washer.
8. Place the Shower Head in the Holder.

NOTE:

• The Shower Head Holder should not be fixed at a location higher than the Shower Heater.
• The pointed part of the flexible Hose should be fitted to the Shower Head.

Electrical Connection

1. For electrical installation, disconnect the main power supply to avoid electric shock.
2. Make sure to use the required wire size which is 14 AWG.
3. Route the wire into the Shower Heater and connect to the terminal block as follows:

• Live Wire to terminal marked L
• Neutral Wire to terminal marked N
- Earth Wire to terminal marked E

1. Used the wire clamp to secure the wire. The clamp is suitable for 6mm^2 wires or can be reverse for 10mm^2 wires. If the wire is larger than 10mm^2 is been used, do not use the cable clamps but make sure that the wire is securely fitted.

NOTE:

• Make sure that the terminal block screws are fully tightened and that no wire insulation is trapped under the screws.
• The Shower Heater must be permanently connected to the electrical supply via a circuit breaker.
• The Shower Heater should be earthed. Improper grounding may result in malfunctioning of ELCB. Never use the Shower Heater if there is a doubt on the grounding installation.
• Do not switch ON the electrical supply until the front cover has been fitted.

FEATURES AND FUNCTIONS

Light Indicators

- POWER: As soon as the Power Control Knob is turned clockwise the indicator will turn ON but if the water pressure is not enough the power light indicator will still OFF then the Shower Heater is not functioning.

- ELCB: It indicates that there is no electric leakage in the system and the Shower Heater is safe to operate.

NOTE:

• The Shower Head Holder should not be fixed at a location higher than the Shower Heater.
• The pointed part of the flexible Hose should be fitted to the Shower Head.

Electrical Connection

1. For electrical installation, disconnect the main power supply to avoid electric shock.
2. Make sure to use the required wire size which is 14 AWG.
3. Route the wire into the Shower Heater and connect to the terminal block as follows:

• Live Wire to terminal marked L
• Neutral Wire to terminal marked N
- Earth Wire to terminal marked E

1. Used the wire clamp to secure the wire. The clamp is suitable for 6mm^2 wires or can be reverse for 10mm^2 wires. If the wire is larger than 10mm^2 is been used, do not use the cable clamps but make sure that the wire is securely fitted.

NOTE:

• Make sure that the terminal block screws are fully tightened and that no wire insulation is trapped under the screws.
• The Shower Heater must be permanently connected to the electrical supply via a circuit breaker.
• The Shower Heater should be earthed. Improper grounding may result in malfunctioning of ELCB. Never use the Shower Heater if there is a doubt on the grounding installation.
• Do not switch ON the electrical supply until the front cover has been fitted.

FEATURES AND FUNCTIONS

Light Indicators

• POWER: As soon as the Power Control Knob is turned clockwise the indicator will turn ON but if the water pressure is not enough the power light indicator will still OFF then the Shower Heater is not functioning.
• ELCB: It indicates that there is no electric leakage in the system and the Shower Heater is safe to operate.

Control

• POWER CONTROL KNOB: to set the desired water temperature.
• TEST BUTTON: to simulate the ELCB (Electronic Leakage Circuit Breaker). Once you press this button, the unit will automatically shut OFF.
• RESET BUTTON: to activate the unit.

NOTE:

- ELCB (Electronic Leakage Circuit Breaker)- this is a safety device that detects an electrical leakage and turns the unit OFF to protect the users.

HOW TO USE

1. Make sure the Power Control Knob is in OFF position before using.
2. Turn the main water valve ON.
3. Adjust the Water Flow Regulator Knob to desired water flow from the Shower Head.
4. Adjust the Power Control Knob to the desired water temperature.
5. Always turn the Power Control Knob to OFF position after use.

NOTE:

- If there are other branch pipes are connected to the main water supply, the pressure of the water will be lowered when other faucets are opened. In that case the water temperature will be increased and we should be aware of it.

TROUBLE SHOOTING GUIDE

Problems	Possible Causes	Solutions
Water is too cold	Too much water pressure is flowing through the shower heater.	Reduce the flow rate.
	Defective heating element.	Change the heating element assy.
	The wiring is open circuit.	Check the wiring.
Water is too hot	Temperature is too high.	Decrease the temperature setting.
	Water pressure is to low	Lower the temperature.
	Defective PCB	Check and repair / change the PCB.
Shower heater is switching off during operation	Interruption of main electrical supply	Check the breakers, switches and supply cabling
	ELCB Activates due to possible electric leakage.	Check electrical leakage and press Reset button.
The water stops flowing	Blockage in the shower head, twisted or blocked flexible shower hose.	Clean / change the shower head, check and clean the shower hose. Replace if necessary.
	No water supply	Check if the water supply is open and no blockage.