HES-48VD - Water heater HITACHI - Free user manual and instructions

Product Type	Electric Water Heater
Model	HES-48VD
Brand	Hitachi
Capacity	48 Gallons (approx. 182 Liters)
Dimensions (Height x Diameter)	60 in x 20 in (152.4 cm x 50.8 cm)
Weight (Empty)	150 lbs (68 kg)
Power Supply	240V, 30A, Single Phase
Heating Element Power	4500 Watts (Dual Elements)
Energy Factor	0.95
Temperature Range	90°F - 150°F (32°C - 66°C)
First Hour Rating	60 Gallons
Tank Material	Glass-Lined Steel
Insulation Thickness	2 inches (5 cm)
Anode Rod	Sacrificial Magnesium Anode
Safety Features	Thermostat, T&P Relief Valve, ECO
Required Clearances	12 in (30 cm) from sides, 24 in (61 cm) from top
Water Connections	3/4 inch NPT
Installation	Professional Installation Recommended
Maintenance	Annual Flushing, Check Anode Every 3 Years
Warranty (Tank)	6 Years
Warranty (Parts)	1 Year
Spare Parts Available	Thermostat, Heating Element, Anode Rod, Relief Valve
Compliance	UL Listed, Energy Star Qualified

Frequently Asked Questions - HES-48VD HITACHI

How do I set the temperature on my Hitachi HES-48VD water heater?

Locate the thermostat dial on the lower front panel. Use a screwdriver to adjust the setpoint between 90°F and 150°F. The recommended setting is 120°F for energy savings and safety. Always turn off power before adjusting.

What does the HES-48VD model number stand for?

The 'HES' likely denotes the series, '48' indicates the capacity in gallons, and 'VD' may refer to voltage or design variant. Always refer to the user manual for exact specifications.

How often should I flush my water heater?

Annual flushing is recommended to remove sediment buildup. Attach a garden hose to the drain valve at the bottom, open the pressure relief valve, and drain until water runs clear. This maintains efficiency and prolongs lifespan.

What should I do if the water is not heating?

Check the circuit breaker and reset if tripped. Ensure the thermostat is set above 90°F. If still no heat, test the heating elements or replace them. For electric models, a faulty thermostat or element is common. Consult a professional.

Is a pressure relief valve necessary?

Yes, the temperature and pressure (T&P) relief valve is a critical safety device. It prevents excessive pressure or temperature. Test it annually by lifting the lever briefly. If it leaks, replace it immediately.

How do I replace the anode rod in my HES-48VD?

Turn off power and water supply. Drain a few gallons. Locate the anode rod (usually on top). Use a 1-1/16 inch socket wrench to remove it. Install a new magnesium anode with Teflon tape. Reassemble and check for leaks.

Can I install this water heater myself?

While possible, professional installation is strongly recommended due to electrical and plumbing requirements. The installation must meet local codes. Incorrect installation can void warranty and cause hazards.

What is the energy efficiency of the HES-48VD?

The water heater has an Energy Factor of 0.95, meaning 95% of the energy is converted to heat. It is Energy Star qualified, reducing operating costs. Proper insulation and temperature setting further improve efficiency.

Why is my water heater making a popping noise?

Popping noises are usually caused by sediment buildup on the lower heating element. Flushing the tank annually removes sediment. If noise persists, inspect and clean the heating elements. Excessive buildup may require replacement.

How do I adjust the temperature on a dual-element heater?

Dual-element models have separate thermostats. Both must be set to the same temperature to avoid overheating. Access panels on the upper and lower sections. Adjust each with a screwdriver. Ensure power is off during adjustment.

USER MANUAL HES-48VD 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.

Set to the desired temperature by pressing either the "DOWN" or "Up" button.

TEMP CONTROL

ปุ่มลดอุณหภูมิ

Down Button

ปุ่มเพิ่มอุณหภูมิ

Up 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.

HITACHI

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 MID 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 holding a pipe (no text or symbols)

Illustration of a hand holding a showerhead with motion lines, next to a stylized showerhead emitting smoke (no text or symbols)

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.

HITACHI

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 a hand using a tool to clean or adjust a faucet (no text or symbols visible)

Illustration of hands using a tool to clean or wash a water tap (no text or symbols present)

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.

HITACHI

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.

Install on concrete, brick or ceramic wall

Drill holes on the wall.

☐ Insert the plug to the holes.

☐ Tighten two screws in the top plug leaving about 3 to 4 mm. space. Next hang the heater unit on the screws and move to tighten the 4 screws and seal the holes with plaseal.

☐ Installation the hanger on level properly. If shower head is hung the highest shower head not over the top of water heater.

☐ After installation of the heater unit, proceed to install the safety valve to the until at the water inlet tube.

Use proper tools for the installation

Before working on any electrical part, turn off the circuit breaker

first.

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