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Safely cuts off electric power when water temperature exceeds the highest preset limit.
A safety valve with four functions: pressure release, non-return, expansion, and drain.
Controls water temperature by cutting power supply on reaching the set point.
A non-self resetting safety device that cuts power at 96 ± 6°C if thermostat fails.
Prevents excessive pressure, acts as non-return, expansion, and drain valve.
Details on connecting cold water inlet, hot water outlet, and MFV with flexible pipes.
Essential operational guidelines and precautions for safe and efficient use.
Safely cuts off electric power when water temperature exceeds the highest preset limit.
A safety valve with four functions: pressure release, non-return, expansion, and drain.
Controls water temperature by cutting power supply on reaching the set point.
A non-self resetting safety device that cuts power at 96 ± 6°C if thermostat fails.
Prevents excessive pressure, acts as non-return, expansion, and drain valve.
Details on connecting cold water inlet, hot water outlet, and MFV with flexible pipes.
Essential operational guidelines and precautions for safe and efficient use.
This document provides operating instructions for the Havells Monza EC Storage Electric Water Heater, available in 10, 15, 25, 35, 50, and 100 L capacities. It is designed to provide many years of trouble-free operation, utilizing high-quality materials and components.
The water heater features a high-quality Incoloy 800 glass-coated heating element, which offers superior heating performance and excellent resistance to oxidation, carbonization at high temperatures, and erosion from hard water conditions. This extends the lifespan of the heating element and minimizes energy loss. The inner tank is made of heavy-gauge steel with a Fero glass coating layer, providing enhanced corrosion resistance and anti-rust properties compared to standard inner tank designs. A single weld line on the inner tank further reduces the risk of water leakage. The tank's durability is ensured through multiple online tests, including Uric Acid, Anti Alkaline, Fatigue, and Environment Synchronization tests.
For protection against corrosion, the water heater incorporates a heavy-duty anode rod with a steel core, which safeguards the enameled tank from rust and corrosion. Energy efficiency is achieved through high-density PUF (Polyurethane Foam) insulation, which is CFC-free and thicker, offering complete protection against radiant heat loss. The water heater also features Whirlflow water tubes, designed to prevent immediate direct contact between cold and hot water, leading to faster heating and maximum energy saving. A thermal cutout is included as a safety measure, which automatically cuts off electric power if the water temperature exceeds the highest preset temperature, ensuring user safety.
The device is equipped with a multifunctional safety valve (MFV) that performs four critical functions: a pressure release valve (PRV) to prevent excessive pressure buildup by releasing water, a non-return valve (NRV) to prevent water from returning to the supply and thus dry heating, a vacuum release valve (VRV) to allow hot water expansion during heating, and a drain device for emptying the tank during prolonged non-use or maintenance. The MFV's proper functioning can be maintained by periodically cleaning salt deposits and lifting the drain lever. An adjustable temperature knob with a thermostat allows manual setting of water heating between ambient temperature and 75°C. An external temperature meter provides a visual indication of the water's heating progress and related temperature. The 4-bolt flange design facilitates easier product maintenance.
Havells Water Heaters are built with multiple safety devices. The capillary-type thermostat "cuts-off" and "cuts-in" the power supply within a narrow temperature range. An indicator lamp shows the thermostat's proper working by glowing and un-glowing. This device has an adjustable knob to set the desired water temperature. A non-self-resetting thermal cutout acts as a safety device, cutting off power at 96 ± 6°C if the thermostat fails. This cutout requires manual resetting before the heater can operate again.
For installation, it is recommended to use qualified plumbers and electricians. Adequate space (50mm from ceiling, 500mm from sides, and minimum 1.8m from ground) should be provided for easy installation and servicing. Necessary tools and accessories, such as a drilling machine, spanner, tool kit, two metal flexible pipes, and a PVC pipe for drainage, should be available. The wall structure needs to be prepared suitably. For hollow brick walls, sufficient space must be dug to accommodate the wall mounting bracket (minimum 100mm depth), filled with cement concrete, and allowed to cure before fixing the bracket with bolts. For solid walls, holes should be drilled, and the nut/bolt assembly inserted, ensuring the wall plate is firmly fixed to safely carry the water heater's weight. Once the wall bracket is secure, the water heater can be hooked onto it, ensuring the bracket fingers are properly seated in the mounting slot. The water heater should not be installed in areas of direct sunlight or water splashes.
Water connections require careful attention. The inlet should not be connected directly to a water lifting pump, and the heater should never be switched on without water in the tank. If inlet water pressure exceeds 5.5MPa or a water pressure head of 80 meters, a dead weight valve should be installed before the inlet. A minimum height of 4 meters between the water heater and the water supply tank is recommended. Metal flexible pipes should be used for connecting the inlet and outlet to bathroom fittings. The cold water inlet is marked blue, and the hot water outlet is marked red. First, the MFV must be fixed to the water heater's inlet. Then, the cold water inlet is connected to the other end of the MFV with a metal flexible pipe. The inlet water tap should be opened to fill the water heater, ensuring water flows from the outlet before closing the hot water tap. The outlet is then connected with a metal flexible pipe to the hot water outlet point of the bath fitting. The tap and valve should be opened to check water flow. Finally, the MFV should be connected to a PVC pipe for drainage. It is crucial to ensure no leakage of water through inlet and outlet joints.
The water heater is supplied with all internal connections and wiring made at the factory. It comes with a supply cord and a 3-pin plug top with 16 Amp. The electrical contact of the 3-pins plug and switch must be secure with proper earthing. To energize the water heater, the 3-pin plug should be inserted into an electric supply socket. The internal wiring diagram shows the internal wiring, including connections for electricity leakage protection, thermal cutout, and temperature controller.
When using the heater for the first time, ensure it is not switched "ON" before filling it with water. Leave the hot water tap open, fill the heater by opening the control valve at the inlet, and close the hot water tap once water flows from it. The heater will always have water inside, as water drawn will be replaced from the overhead tank. Always keep the inlet control valve open. Then, switch "ON" the power supply. For regular use, always keep the inlet valve open so that water drawn from the hot water tap is automatically replaced from the mains. The thermostat will automatically cut off power when the water reaches the required temperature. The thermostat setting can be adjusted to suit the desired outlet water temperature (avoid frequent tampering). Lowering the setting gives lower hot water temperature, and increasing it gives higher temperature. Initially, it may take a long time for the water to heat up, so it's recommended to switch "ON" the heater at least an hour before use. For early morning hot water, switching "ON" the previous night is an option, as the thermostat will cut off power automatically once the set temperature is reached. The heater can also be kept "ON" continuously, as it is insulated, and the water will remain hot, with the thermostat maintaining a constant temperature.
For maintenance and cleaning, always contact a Havells approved dealer or authorized franchise to ensure the guarantee remains valid. Keep the inlet control valve open at all times. Never switch on the water heater without water, as it will damage the heating element. Check the condition of metal flexible pipes at least once a year and replace them if damaged. Inspect the power supply cord for any damage and replace it with an authentic supply cord if necessary. To extend the heating element's life, de-scaling should be done periodically with the assistance of an authorized service center.
If the water heater is not used for a long time, switch off the power supply, stop the inlet water supply, and unscrew the drain lever to remove water through the MFV's drain system. Before reusing, ensure the drain plug lever is reset and screwed, open the inlet valve, fill the water heater until clean water flows from the outlet tap, and then plug in the power supply to heat the water. Periodically check the MFV for proper operation by removing salt deposits. Check the safety valve every two months by opening and closing the test lever. The heating element should be checked annually for "No Scale Formation" due to water impurities. The magnesium anode rod should be checked annually and replaced with a new one if more than 60% worn out.
For cleaning the element or replacing the anode, first switch off the electric supply and open hot water taps until all hot water is removed. Close the cold water supply. Drain cold water from the tank through the MFV drain pipe by lifting the drain lever and removing the flexible pipe. Remove the water heater from the hanger hook. Remove the inspection cover from the bottom and unscrew the heating assembly flange. Clean the container and heating element assembly to remove scale formation using a suitable acid or by gently scraping. Check the heating element surface for "No Surface Damage." Replace the magnesium anode if worn out. Remount the heating assembly flange, ensuring internal wiring connections are made as per the diagram. Hang the water heater on the mounting bracket/hook, ensuring it is properly seated. Open the cold water supply until water flows without interruption from the outlet valve. Close the outlet valve and check for "No eventual leakage" around the flange and water connections. Once there is no leakage, switch on the electric supply.
General| Capacity | 25 L |
|---|---|
| Power Consumption | 2000 W |
| Voltage | 230 V |
| Heating Element | Copper |
| Temperature Range | 25 - 75 °C |
| Warranty | 2 years |
| Mounting | Vertical |
| Rated Pressure | 8 bar |
| Type | Electric |
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