A O Smith ELJH-30 Storage Water Heater User Guide
- June 13, 2024
- A O Smith
Table of Contents
A O Smith ELJH-30 Storage Water Heater
About A.O. Smith
A. O. Smith Water Products Company is the largest water heater manufacturer in
the world, a global leader in innovative technology and energy-efficient
solutions. In 1936, A. O. Smith developed and patented a technology for glass-
line water heaters. Over the years, A. O. Smith has gained the respect and
support of homeowners, contractors, architects, and specifying engineers in
over 60 countries by providing innovative energy-efficient products designed
for years of trouble-free service.
What’s in the box?
Specifications
| Gen 1 ELJH | |
|---|---|
| Rated volume (L) | 30 |
| Power (W) | 2000-2200 |
| Voltage/frequency (V/Hz) | 220-230/50 |
220-230/50
Temperature range (°C)| 35-75±5| 35-75±5| 35-75±5| 35-75±5| 35-75±5
Rated water pressure (MPa)| 0.8| 0.8| 0.8| 0.8| 0.8
Minimum inlet water pressure (MPa)| 2.0| 2.0| 2.0| 2.0| 2.0
Maximum inlet water pressure (MPa)| 3.0| 3.0| 3.0| 3.0| 3.0
Inlet/outlet connection (inches)| ½| ½| ½| ½| ½
Waterproof grade| IPX1| IPX1| IPX1| IPX1| IPX1
Weight (kg)| 17| 19| 21| 24| 31
Overall dimensions (mm)| Ø360×605| Ø360×710| Ø360×830| Ø360×962| Ø463×860
A. O. Smith reserves the right to make product changes or improvements at any time without notice.
Component Description
| Part Description | |
|---|---|
| 1. Temperature indicator | 7. Multi-function safety valve |
| 2. Heating element | 8. Stopcock (not included with water heater) |
| 3. Anode | 9. Pilot light |
| 4. Cold water inlet pipe with diffuser | 10. Inlet |
| 5. Hot water outlet pipe | 11. Outlet |
| 6. Thermostat | 12. Thermal cut out |
Key Features
Glass
Coated Element
Scale and sediment buildup on the surface of standard elements lead to
premature failure. An A. O. Smith glass-coated element helps to prevent scale
formation on the element, extending the life of the element.
Blue Diamond Glass Lining
A. O. Smith water heaters come with Blue Diamond glass-lined inner containers.
This lining is achieved through a specialized fusion process carried out at
870ºC. Inner tanks are designed to pass the 100,000-cycle fatigue life test in
accordance with relevant UL (Underwriters’ Laboratories) Standards. This makes
our tanks one of the best inner containers, resistant to rust and scaling.
Anode Rod Protection
The tank has an anode rod system with a stainless core that is designed to
protect the tank from corrosive elements. The system uses a special cathodic
action to fight the corrosive elements, prolonging the life of the water
heater.
Safety Valve
This water heater has a pressure safety valve. This valve is designed to
automatically relieve and discharge water in case the pressure or temperature
exceeds the preset limits.
Thermal Cut Out
The water heater employs a thermal cutout. In case any fault occurs and the
water temperature exceeds the highest preset temperature (93°C), the switch
rapidly cuts off the live and neutral line for the user’s safety.
Installation
CAUTION: Please wait for 30 minutes before using the heater for the first time.
CAUTION
- The heater should only be connected to a power source after a full installation which ensures secure mounting, piping, wiring, and filling of the tank with water.
- To prevent injuries from lifting heavy equipment, the water heater should be installed by at least 2 persons.
- The water heater must be lifted in an upright position. Do not tilt over a 45º angle. Disassembly and assembly by end users is prohibited.
- The water heater must be installed by qualified personnel
Mounting
This water heater should be installed at a location that is close to a power
source, floor drain, and water utilization point. In the installation area, it
should be ensured that the water leakage from the heater or
pipeline joints may not cause damage to the articles in adjacent regions or
lower layers of the building. When installing the water heater, be sure to
mount the water inlet and outlet pipes at the bottom of the heater. Vertical
installation of the water heater is strictly prohibited.
Mounting procedures and precautions
The installation surface must be capable of supporting at least three times
the weight of the water heater when filled with water. If the water heater is
not installed on the weight-bearing wall or is mounted on a hollow brick wall,
corresponding protective measures must be provided. This water heater must be
installed with the fixing accessories provided. The heater must be hung until
the
accessories are fixed firmly or else the heater may fall off, and serious
injuries might be caused.
Mounting guidelines
Drill two holes at least 90 mm in depth using an electric impact drill with a
Ø 10mm bit. The holes must be level. The space between the two holes should be
as shown in the table. A plastic expansion tube must be placed into the
drilled holes before the brackets are inserted. It is necessary to use a
special inner hexagon spanner to fasten the bolts into the expansion tubes, no
other tools are permitted. Ensure the screw is not excessively tightened. This
may damage the expansion tubes. Insert the square holes of the upper
supporting rack at the back of the water heater onto the brackets, then press
the water heater down firmly to ensure the holes are lodged against the
brackets.
| Model | L (mm) |
|---|---|
| ELJH-30 | 260 |
| ELJH-40 | 260 |
| ELJH-50 | 380 |
| ELJH-60 | 380 |
| ELJH-80 | 380 |
| ELJH-100 | 380 |
CAUTION
The mounting accessories provided can only be used for solid walls, as shown
in the drawing above. Improper installation may cause the water heater to
dislodge.
Plumbing connection
Do not alter the installation position or block the relief valve. Connect the
safety valve provided with this unit to the inlet of the water heater (the
inlet pipe has a blue cap). The arrow points to the direction of water flow
(to the heater). The storage heater must be permanently connected to the water
mains and the use of a hose set is prohibited. The safety valve must be
connected to the discharge pipe and mounted downwards to a floor drain in a
frostless environment. As water may drip from the discharge pipe during the
operation of the heater, a floor drain should be provided nearby. The pipes
should not be blocked. The relief valve is to be operated regularly to remove
lime deposits and to verify that it is not blocked.
The hot water pipe is connected to the water outlet (the outlet pipe has a red cap). If the water pressure of the inlet pipe approaches or exceeds the relief limit (0.80 MPa) of the safety valve, the valve will relieve pressure automatically. Refer to the following diagram for the pipe connection. Nylon hoses should be used for the connection between the tapping pipe and the heater. We recommend the use of a double-check valve assembly for the installation of the water heaters. The Double-check valve assembly is a safe and effective measure for preventing backflow and back siphonage of water from the water heaters through the inlet pipe.
CAUTION
Apply proper sealant to the pipe joints to prevent leakage. Do not over-
tighten the safety valve to avoid damage.
Water inlet and outlet connection
Power connection
This water heater must be permanently connected to the electrical supply
through a double pole switch having a contact separation of at least 3mm in
all poles incorporated in the fixed wiring. Use an independent high-quality
socket that is reliably grounded. Its rated current should not be less than
16A. Ensure reliable contact with the power source. The maximum power of this
water heater is 2000W, hence a single dedicated power supply circuit is
proposed. The core area of the electric supply wire should not be less than
2.5 mm². If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent, or similarly qualified persons in order to
avoid a hazard.
Wiring diagram
1. Thermostat setting knob 250V ~ 50/60Hz 16(2.6)A| 4. Power supply
connection
---|---
2. Pilot light 220V ~ 50/60Hz| 5. Ground connection
3. Thermal cut out reset button 220-277V a.c.| 6. Heating element 2000W
Water filling
After all the pipes are connected, open the discharge valve of the water
heater and then the feed valve. Fill the water heater with water and exhaust
the air till a uniform water stream flows out of the hot water outlet. This
indicates that the water heater has been filled up. Close the hot water
discharge valve and check all connections for any leakage. If leakage occurs,
empty the water tank, repair the leaked connection and then refill the heater
with water. Do not close the feeding valve during the filling of water.
Directions for use
Before using the water heater, make sure it is filled with water and that the
power source has been connected properly. Please wait for 30 minutes before
using the heater for the first time.
Temperature setting
Set the temperature by adjusting the temperature setting knob on the right
side of the water heater. The set temperature goes up when turning down the
knob and goes down when turning upwards. The default
temperature setting is the highest temperature.
Operation
After making sure the heater is filled up, turn the power on. The indication
light will be lit as the water is heating. The indication light will go off
when the water has been heated to the set temperature.
Note: Water dripping from the safety valve outlet during heating is a normal
occurrence. Under normal conditions, the safety valve lever should be opened
periodically. If water flows from the valve, it is in good working condition.
Otherwise, please contact a local authorized A. O. Smith dealer.
Maintenance instructions
DECLARATION : Only an A. O. Smith authorized service personnel may
maintain and repair this water heater. Improper methods could result in
serious injury or property damage.
WARNING – Electric shock: Before repairing the water heater, be sure to
disconnect the water heater from the power source.
CAUTION: Prior to repair works, please refer to the troubleshooting
chart.
Maintenance
- If the water heater needs to be serviced, shut off the water inlet valve, remove the relief valve, and drain the tank from a discharge pipe connected to the water outlet.
- The tank should be flushed periodically to remove sediment buildup. The procedures are as follows:
- Disconnect the power.
- Shut off the water inlet and remove the relief valve before draining the heater.
- Connect the water heater outlet to a tap water source and the outlet to a drainage pipe. Turn on the water source to the tank and allow the flow to discharge from the drainage pipe.
- Increase the water flow and flush the tank till the water flowing from the drainage pipe runs clean.
- Reconnect the inlet and outlet pipes. The tank flush is complete.
CAUTION
Drained water might be above 50ºC and may scald.
Troubleshooting
| Problem | Possible causes | Corrective action |
|---|---|---|
| No indication light No hot water | 1) No power to heater |
2) No power at electric socket
3) Failure in control circuit or internal wiring
| 1) Switch on power to heater
2) Check power socket
3) Contact local authorized dealer
No indication light
High water temperature
| 1) High temperature limit switch tripped
2) Electrical circuit failure
| 1) Switch off power supply
2) Contact local authorized dealer
Indicator light on, no hot water| Heating element or internal circuit failure|
Contact local authorized dealer
Dripping from pipe joints| Unsealed joints| Reconnect pipes of the water
heater and be sure to use sealant
Dripping from enclosure| 1) Tank or accessories leakage
2) Drain blocked
3) Condensation pipe distorted or not downward facing
| 1) Disconnect power to heater immediately
2) Check and direct condensation pipe downwards
3) Contact local authorized dealer
CAUTION
- Before installing the heater, ensure that the power source and wires are suitable
- The heater should be earthed reliably. Ensure the earth wire is not in contact with the neutral wire or any pipes
- Once the temperature has been set and the relief valve installed, end users should not alter the installation location or tamper with the relief valve
- Hot water over 50°C will scald. Always test the water temperature by mixing it with cold water before coming into contact with it.
- 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 instructions concerning the use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with appliances.