HES-45V - Water heater HITACHI - Free user manual and instructions

Type	Electric Storage Water Heater
Brand	Hitachi
Model	HES-45V
Capacity	45 liters
Power Source	Electric (220-240V, 50/60Hz)
Power Consumption	Up to 2000 W (typical)
Dimensions (WxDxH)	Approx. 450 x 450 x 680 mm
Weight	Approx. 18 kg (empty), 63 kg (full)
Water Connection	1/2 inch BSP inlet/outlet
Pressure Rating	Max 8 bar
Temperature Range	30°C to 75°C (adjustable thermostat)
Energy Efficiency	Energy Class C (typical)
Heating Time	Approx. 45 minutes to heat fully from cold
Insulation	Polyurethane foam, 40mm thickness
Safety Features	Thermal cut-off, pressure relief valve, overheat protection
Maintenance	Annual flushing of tank; check anode rod every 2 years
Cleaning	Wipe exterior with damp cloth; do not use abrasive cleaners
Spare Parts	Thermostat, heating element, anode rod, gaskets, safety valve
Installation	Wall-mounted or floor-standing; must be installed by qualified professional
Warranty	Standard 2 years (may vary by region)

Frequently Asked Questions - HES-45V HITACHI

How do I adjust the temperature on the Hitachi HES-45V water heater?

Locate the thermostat dial on the front panel. Turn it to your desired temperature, typically between 60°C and 75°C for household use. Wait for the heater to cycle before rechecking.

What should I do if the water heater is leaking?

First, turn off the power supply and close the water inlet valve. Check for leaks around the pressure relief valve or pipe connections. If internal tank leakage is suspected, contact a qualified technician.

How often should I flush the tank?

It is recommended to flush the tank at least once a year to remove sediment buildup. This improves efficiency and prolongs heater life. Follow the manual's flushing procedure.

My water heater is not heating water. What could be the cause?

Possible causes include a tripped circuit breaker, faulty thermostat, or burned-out heating element. Check the power supply first. If that is fine, consult a professional for further diagnosis.

Can I install the HES-45V myself?

Installation should be done by a licensed plumber or electrician to ensure compliance with local codes and safety. Improper installation can lead to leaks, electrical hazards, or voided warranty.

What is the function of the pressure relief valve?

The pressure relief valve automatically releases excess pressure from the tank to prevent explosions. Do not block or tamper with it. Test the valve periodically by lifting the lever briefly.

How do I reduce energy consumption of my water heater?

Set the thermostat to an efficient temperature (around 60°C), insulate exposed pipes, and use less hot water by installing low-flow fixtures. Also, consider using a timer to heat only when needed.

What does the glow of the indicator light mean?

A solid green light typically indicates the heater is in standby mode. An orange or red light may indicate active heating or a fault. Refer to your manual for specific light codes.

How long does it take to heat a full tank of water?

With the standard 2000W element, it takes approximately 45 minutes to heat 45 liters of water from 20°C to 60°C. Heating time may vary with incoming water temperature.

Where can I find spare parts for the HES-45V?

Spare parts such as heating elements, thermostats, and anode rods can be purchased from authorized Hitachi dealers or online parts stores. Always use genuine parts for safety and performance.

USER MANUAL HES-45V HITACHI

HITACHI Inspire the Next

Instruction and installation manual ELECTRIC SHOWER HEATER

รัฐน/Model HES-35VD/HES-35VDS HES-45VD/HES-45VDS/HES-48VD

สารบัญ/CONTENTS

How to use Product : To adjust water temperature.

Please read the instruction manual before use for the proper usage of this product.

After reading, please keep it for future reference.

Switch "ON" the circuit breaker (No.1)

Push up the reset ELCB lever (No.6) if it is down.

Remark Sometimes you have to set the current time after resetting the ELCB lever (No.6). Instruction on how to set the clock, please refer to CLOCK SETTING (page 8)

Turn on the main water valve (No.2) (water will flow out of the shower head)

Select the shower flow by revolving the shower flow lever.

Remark The shower flow image indicated above “△” is the selected shower flow.

When "Pause" button is pressed, water flow is impeded for a moment. If you want to stop water for long time, slide "Lock" button after pressing "Pause" button.

Actual shower temperature varies in the range of ±2^ of displayed temperature. Every time you press

"DOWN" ▼ or "Up" button, °C on the LCD display will blink and when the water temperature reaches the set temperature, °C will stop blinking.

e.g. : If the temperature is set to 42^ C and the word “MAX” appears on the display, please reduce the flow of water until ^ C stops blinking.

คำเตือน WARNING

The water temperature will become very hot if the water flow rate is too low.

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The default temperature memory setting(factory setting) is

Press "short beep" will sound and display will show 36°C.

Press Up /Down Button to set the temperature you want.

For the Temperature Memory of 📄 and , please perform the same step.

Example Memory Changing at 42°C.

Press "short beep" will sound and display will show 36°C.

Press Up, temperature will be changed to 42^ C.

Press "beep" will sound twice to let you know that the unit has already recorded.

For the Memory Changing of 📄 and , please perform the same step.

7. ข้อสำคัญ IMPORTANT ISSUE

Do not connect the cold water tube to the outlet hot water.

Do not install any stop valve in the outlet pipe line. It will cause heating tank or pipe to damage.

Do not use other maker's shower hose and metal made shower hose. Using of metal shower hose will accidentally cause of electrical shock. Use only the shower hose and head packed in Hitachi Shower Heater.

Do not spray to shower heater or put the wet cloth on the shower heater.

Do not cover the shower head with your hand or bath towel or fold the water hose.

Do not adjust or repair the accessories for prevention of over pressure water.

In case of setting high temperature and quickly reduce the water pressure, will cause hot water spills out of the outlet. So, please be careful.

Illustration of a sad book character spraying water from a hose, and a distressed book character with tears (no text or symbols)

Illustration of a hand showerhead and a warning symbol (no text or symbols present)

คำเตือน WARNING

Turn off PUSH ON/OFF switch the unit every time after using.

หมายเหตุไฟฟ้าดับ

If the power fails more than 1 minute, the display will back to the default setting. Press PUSH ON/OFF switch again to start the new operation again.

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To ensure that reset ELCB lever is fallen down before cleaning.

☐ To clean the body of the shower heater by using cloth to dipping water, twist dryly.
☐ Do not use benzene and thinner so on for cleaning.

Illustration of hands using a tool to clean or prepare a faucet (no text or symbols visible)

Illustration of hands using a tool to clean or repair a mechanical component, with a faucet and pipe nearby (no text or symbols)

Please check the following point as below

If you find the following errors during operation, please contact the dealer immediately.

Repairing must be done by the specialized technician.

Clock works as usual by Lithium battery even if the power is off. If you want to change battery, please contact the HITACHI dealer immediately.

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It should be installed by the expert, please inquire the dealer of "HITACHI"

คำเตือน WARNING

Please check to make sure that there is sufficient water pressure with the minimum water pressure of the model HES-35VD/35VDS, HES-45VD/45VDS and HES-48VD are 15.6906 kPa (0.16 Kgf/cm ^2 ) and the maximum pressure must be less than 343.233 kPa (3.5 Kgf/cm ^2 )

Electric wire has to join permanently together with the main line according the table below.

Opening of the cover out of the unit base.

Use proper tools for the installation

Connect the wiring following picture

Connect the wires to the correct terminals (L and N)

The shower heater must be always grounded.

Please describe the operation instruction of this heater unit to your customers or users.

Operation test

1) ☐ Open the water valve from the main valve (No.2) water will flow out of the shower head.

☐ Check to see if water leaks from the tubes or not.

2) ☐ Before opening the circuit breaker (No.1) please check the wire connections.

☐ Push the circuit breaker (No.1) to "ON" position.
☐ Push to ELCB (No.6) lever to the upper side to set the ELCB (No.6) to work.
☐ Press the button of the ELCB checker (No.5).

☐ If the lever of the ELCB checker (No.6) comes down, it shows that the shower heater works normally.
☐ Push the lever of the ELCB checker (No.6) to the upper side (The machine is ready to work.)

3) ☐ Press the PUSH ON/OFF (No.3) switch red (POWER) indicator light and water flow out of shower head according to the set temperature.

☐ Press UP ▲ /DOWN ▼ temperature control button. Indicator °C will blink. When water reaches to the set temperature, °C will stop blinking.

HITACHI

3RPL093721 2014-06 (YT-HCPT)R0