bajaj electricals limited Page 1 of 8
KNOW YOUR
bajaj
Storage Water Heater
The Energy Efficient Range
Dear Customer,
Congratulations! You are now the proud owner of an Energy Efficient Bajaj Storage Water Heater, the most
durable, dependable and safe product in the market today. And we mean what we say.
Why? Because we at Bajaj understand your concern, your need for reassurance. So we designed our Storage Water
Heaters with one single minded objective - Safety. Total protection for you and your family, for years to come.
This manual will answer all your questions and remove your doubts. We have provided a detailed description of our
Storage Water Heaters and clear instructions for Installation and operation. Read this manual carefully, follow the
instructions and we guarantee you will never have to worry about your Storage Water Heaters again.
KNOW YOUR BAJAJ STORAGE WATER HEATER
How does It function?
1. Every Bajaj Storage Water heater unit is made of
a. an outer body, inner tank, heating element
b. safety devices like Safety valve, Thermostat, Thermal cut-out, Fusible plugs and
c. Thermal insulation to retain heat.
2. Water comes into the inner tank through the inlet pipe at normal working pressure of about 30 P.S.I.
3. When the tank is full (this becomes clear when water starts flowing through the outlet) close the outlet and
switch ON the power supply.
4. The heating element heats up the water to a pre-fixed temperature. At this point the Thermostat
automatically switches OFF the power supply to the unit which is indicated by the switching OFF of green
lamp.
5. You can now take the water out through the outlet. Because of the design of the heater & displacement
principle, fresh cold water keeps entering through the inlet.
6. As temperature of water inside the tank drops, the Thermostat again switches ON the power supply to the
heater. When this happens, water starts heating up again. This process continues till you switch OFF the
main power supply to the heater after usage.
7. Since it takes a longer time for the water to heat up in storage water heater. it is advisable to switch ON the
power supply to the unit well in advance of the actual usage.
8. During normal functioning, red lamp does not glow. In case it glows, call the nearest Bajaj Sales and Service
Centre as it indicates that thermostat may be defective.
bajaj electricals limited Page 2 of 8
HOW IS IT MADE? (Fig. 1)
OUTER CASING: This is made of superior quality, rust resistant, mild steel.
It is powder-coated in a variety of colours for an attractive, long-lasting,
finish.
INNER TANK: This is made from 99.5% pure electrolytic extra thick
copper, with reinforced welding at joints. It is suitable for both hard and soft
water. Tested as per BIS specifications it can withstand pressure up to 100
P.S.I. (7.00 Kg/cm2).
Normal working pressure is 30 P.S.I. (2.11 Kg/cm2). This is the most
important consideration in deciding the quality of a water heater. Copper
can easily adjust to changes in temp. and pressure. Therefore, it is ideally
suited for Storage type water heater as it can adjust to high or low
pressure easily. ALL BAJAJ STORAGE WATER HEATERS ARE WITH
INNER TANK MADE OF PURE COPPER. IT COMES WITH A 5 YEAR
GUARANTEE.
HEATING ELEMENT: The heating element is extra long, direct immersion
type, mineral filled and housed in a copper tube. Highly efficient, it can be
removed and serviced/replaced easily while the heater unit is in installed
position. What's more it is 'Bajaj' & 'ISI' marked, with a 2 year guarantee.
NEON LAMPS: These are red and green neon-gas filled lamps which
indicate the functioning of Thermostat and
thermal cut-out. They are mounted on the heater
unit itself. The operation of these lamps is
explained in the 'Operating Instructions'.
INSULATION: Bajaj Water heaters are designed
for high degree of efficiency. Resin bonded extra
thick fibre glass wool pad which is made from
insect proof and fire resistant material is fitted
between the outer casing and the inner tank for
optimum insulation i.e. to ensure minimum heat
loss. Standing heat loss is 30% lower than norms
specified by The Bureau of Indian Standards
(BIS). This insulation keeps the water hot for a
longer period of time.
HARDWARE: All Bajaj Storage water heaters are
provide with rust proof hardware (screws, nuts &
bolts) for the inner tank assembly.
SAFETY SYSTEMS
All Bajaj Storage water heaters are provided with the following safety devices. These devices control temperature and
pressure and hence ensure complete and smooth operation.
SAFETY VALVE: When the pressure inside the tank or at the inlet becomes more than 50 P.S.I. (3.5 Kg/cm
2
) this
device operates. It opens and starts dripping.
THERMOSTAT: This is a stem type automatic temperature control device. It is set to operate at 60
o
C. It is 'Bajaj' and
'ISI' marked.
THERMAL CUT-OUT. This is a "Bajaj" marked bimetallic, stem-type, quick action temperature control device that
operates at 90
o
C. It is fitted with a push-button that can be operated by hand. In case the Thermostat fails or the
heater is operated without water the red lamp glows ON indicating that this device has operated. In such a case call an
electrician to check the unit. THIS DEVICE ALSO HELPS IN PREVENTING DRY HEATING OF THE ELEMENT IN CASE THE
UNITS OPERATED WITHOUT WATER.
FUSIBLE PLUG: All Bajaj Storage Water Heaters are provided with two fusible plugs, one at the bottom and the other
at the top in the vent pipe. In the rare case that the Thermostat & Thermal cut-out fails, this plug melts, releasing hot
water and steam through the drain pipe or vent pipe. Thus it helps in avoiding untoward accidents.
VENT PIPE: All Bajaj Storage Water Heaters have a vent pipe for extra protection. The vent pipe can be extended up
to the water tank situated above and left open into the atmosphere.
bajaj electricals limited Page 3 of 8
This device gives protection against both high and low pressures and is the safest method of installation.
This device also enables the following:
1. Provision of an extra fusible plug at the top.
2. Provision for accessories like Dead Weight Valve, vacuum relief valve etc.
3. Non-pressure type installation.
NON-RETURN DEVICE: There is a siphon hole on the inlet pipe inside the inner tanks of all Bajaj Storage Water
Heaters. When pressure inside the tank becomes low, this siphon hole prevents back flow of water. It acts as a non
return device up to a certain level of low pressure. Thus it prevents collapse of the tank due to vacuum formation.
BENEFITS
1. A two-year guarantee.
2. Attractive colours in two-tone powder-coated finish.
3. Suitable for multi-point usage (pressure type) and single point usage.
4. The largest dealer and After Sales Network available in the country.
5. Rust proof Stainless Steel Hardware facilitates easy servicing.
THE HOW AND WHERE OF INSTALLATION AND OPERATION
A. Fix the Water heater in a perfectly straight position at a suitable height from the floor. While fixing the
horizontal wall models the inlet and the outlet pipes should be on the right side of the person fixing it.
B. There should be enough space around the heater for easy installation and servicing.
C. Make sure that supporting walls or fixture are strong enough to carry the weight of the heater when it is
completely filled with water.
D. A typical installation (for vertical and horizontal mountings) is shown in Fig.
2, 3, 4 & 5. For overall and mounting dimensions please refer the technical
specifications table.
E. There should be a minimum space of 50 cm between the top of the heater
and the roof. This is to make sure that the heater can be removed and
taken out when necessary.
F. The heater should be saved from being damaged by splashing of water.
Therefore, keep a minimum space of about 1.8 m. between the floor and
bottom of the heater.
G. When the mounting is horizontal, keep a minimum space of 50 cm between
the wall and inlet/outlet pipes so that parts can be easily removed for
servicing etc.
H. INSTALL A VRV (VACUUM RELIEF VALVE) IN CASE THE WATER HEATER IS
INSTALLED IN MULTI STOREYED BUILDING.
WATER SUPPLY:
A. You can connect the heater directly to municipal water supply or the water
tank on top of your house. But take care that the distance between the
heater unit and the tank is not more than 70 feet. This is equivalent to 30
P.S.I. or 2.1 Kg/cm
2
pressure.
B. If the height is more, use a Pressure reducing valve at the inlet.
C. The water pressure should also not be too low. The minimum distance
between the heater and the water supply tank should be at least 2 metres.
D. WHEREVER POSSIBLE YOU SHOULD INSTALL THE VENT PIPE FROM THE
TOP OF THE HEATER UP TO THE LEVEL OF THE WATER SUPPLY TANK. THERE, IT SHOULD BE LEFT OPEN TO
THE ATMOSPHERE. THIS IS THE SAFEST METHOD OF INSTALLATION.
bajaj electricals limited Page 4 of 8
WATER CONNECTIONS:
Do not connect the cold and hot water pipe lines directly to the heater. Instead, connect them using flexible tubes of
appropriate material. Never use plastic tube especially at the outlet because it cannot withstand the heat. In case of
direct pipe connections, tightening of couplings using a wrench can damage the heater unit. USE A CONTROL VALVE
AT THE INLET. MAKE SURE THAT IT IS ALWAYS KEPT OPEN.
Technical Specification Table. Check where your Storage Water Heater Fits in.
(Ref fig. 2, 3, 4 & 5)
Overall Dimensions Model
Capacity
(in litres)
Element
Rating
(in Kw)
Time required
to raise the
Temp. by
35
o
C
(in minutes)
Weight of
Water
Heater
(in kgs)*
Pipe
Connection
(in BSP)
A
B
C
D
E
Powder Coated Vertical Models
Colours
EE 6 6 3.0 8 13.50 1/2" 174
185
370
228
15
EE 10 10 3.0 12 16.03 1/2" 214
195
445
264
14
EE 15 15 2.0 20 29.00 1/2" 214
235
475
303
14
EE 25 25 2.0 30 36.00 1/2" 214
385
663
303
14
EE 25
Dwarf
25 2.0 30 36.50 1/2" 214
260
540
355
14
EE 35 35 2.0 55 50.00 1/2" 214
335
650
355
14
EE 15
Designer
15 2.0 20 29.00 1/2" 214
234
488
332
14
EE 25
designer
25 2.0 30 36.00 1/2" 214
384
650
332
14
Powder Coated Horizontal Models**
EE 15 15 2.0 20 28.50 1/2" 214
235
475
303
14
EE 25 25 2.0 30 38.50 1/2" 214
385
663
303
14
EE 35 35 2.0 55 50.00 1/2" 214
335
650
355
14
Stainless Steel Vertical Models
EE 15 15 2.0 20 29.00 1/2" 214
235
475
303
14
EE 25
Dwarf
25 2.0 30 36.50 1/2" 214
260
540
355
14
All
models
are
available
in
following
colours:
Ivory,
White,
Maroon,
Blue,
Pink,
Grey.
* When completely filled with water
** Horizontal models are available in Floor and Wall mounting configurations.
These can be easily converted from Wall mounting to Floor mounting and vice versa.
Due to continuous efforts for improvement, specifications are subject to changes.
bajaj electricals limited Page 5 of 8
WIRING
All the electrical connections inside the Heater are done at the factory. The water heater
is provided with a supply cord and 3 pin plug, which should be connected to main power
supply. Make sure that the connections in the plug and socket are right, and proper
earthing is provided to the unit.
1. Thermal cut-out
2. Thermostat
3. Heating Element
4. Green Neon Lamp.
5. Red Neon Lamp.
Under normal conditions the safety devices that come with our Storage Water Heaters
are sufficient to provide complete protection and smooth operation. However, the
following additional devices are available for special needs and requirements.
PRESSURE REDUCING VALVE:
If water pressure is more than 30 P.S.I. at the inlet i.e. the total height between the heater unit
and overhead water supply tank is more than 70 feet, a Pressure reducing valve has to be fitted
at the inlet pipe.
DEAD WEIGHT VALVE:
This is a device used to prevent excess build-up of pressure. This should be used especially i)
When a pressure reducing valve OR ii) a non-return valve is used in the inlet pipe. This can be
installed at the vent pipe. Where this is not possible, it can be installed at the outlet.
VACUUM RELIEF VALVE:
In many cases, especially in multi-storeyed buildings, there is the problem of low
water pressure. In such cases, water in the heater flows back and out through the
inlet pipe. There is no air to fill the space created as a result of the water flowing
back. Hence, there is a vacuum, which puts pressure inward thereby leading to the
collapse of the tank.
To prevent this from happening, a VRV (Vacuum Relief Valve) should be provided at
the outlet or at the vent pipe. This device lets the air go inside the tank and fill the
vacuum and prevents tank collapse.
THE OPERATION PROCESS
Operation Instructions:
Normally, Water heaters are connected to the water tank situated on top of the
house. Since the heater unit is designed to operate at a given working pressure, the
exact installations are different. To help you install the unit correctly, various
alternatives are shown in Fig. 9, 10, 11,12 and 13.
1. Do not switch ON before filling the heater unit with water.
2. Leave the hot water outlet open and open the inlet valve to allow the heater unit to be filled with water. After
it is full the water will start flowing out from the Outlet.
3. Now close the tap at the outlet. ALWAYS KEEP THE INLET VALVE OPEN.
4. Switch ON the power supply. Green neon lamp will glow ON to indicate that water is getting heated.
5. When the water has reached the set temperature green light will go OFF. This indicates that the thermostat
has operated and has switched OFF the power supply to the unit. You should withdraw the water only after
the green light has switched OFF. Water at desired temperature is now available for use.
bajaj electricals limited Page 6 of 8
6. It takes time for the water to get heated. Therefore, switch ON the unit well in advance before use. The
Heater unit can always be kept ON. Insulation keeps the water hot and thermostat makes sure that the
electric supply is alternately switched ON and OFF.
7. Every once in a while, check the working of the neon lamps to make sure that the thermostat and thermal
cut-out are working properly.
8. The red neon lamp glows ON when i) the thermostat fails OR ii) water temperature reaches
boiling point OR iii) the heater unit is operating without water. This indicates that the thermal
cut-out has operated thereby switching OFF the main power supply to the unit. In such a case
contact the nearest Bajaj sales or service centre.
9. The power supply to the Heater can be kept ON continuously. But it is advisable to switch it OFF when the
unit is not in use for a long time to save on electricity.
Bajaj Storage Water Heater Performance Parameters as Per BIS
Model Capacity
(in litres)
Element Rating (in
KW)
Min. Hot Water
Output (at
o
C)
Reheating Time
(in minutes)
Mixing Factor
(%)
Powder Coated Vertical Models
EE 6 6 3.0 50
o
9 30
EE 10 10 3.0 50
o
10 30
EE 15 15 2.0 50
o
20 30
EE 25 Dwarf
25 2.0 50
o
35 30
EE 25 25 2.0 50
o
35 30
EE 35 35 2.0 50
o
40 30
EE 15
Designer
15 2.0 50
o
20 30
EE 25
Designer
25 2.0 50
o
35 30
Powder Coated Horizontal models
EE 15 15 2.0 50
o
25 30
EE 25 25 2.0 50
o
40 30
EE 35 35 2.0 50
o
40 30
Stainless Steel Vertical Models
EE 15 15 2.0 50
o
20 30
EE 25 Dwarf
25 2.0 50
o
35 30
bajaj electricals limited Page 7 of 8
INSTALLATION CHART (FIG. 9)
i. Inlet water pressure is less than 30 P.S.I. OR
ii. Height of water tank is less than 70 ft. from the water heater OR
iii. Water tank is situated less than 5 floors from the water heater. In such a case if possible remove the vent
nut and extend the vent pipe up to the top level of overhead water supply
tank.
INSTALLATION CHART (Fig. 10)
i. Inlet water pressure is less than 30 P.S.I. OR
ii. Height of water-tank is less than 70 ft. from the water heater OR
iii. Water tank is situated less than 5 floors from the water heater. In such a
case remove the vent plug and fix the accessories like Dead weight valve
(DWV) and / or Vacuum relief valve (VRV) on the vent nut through union.
INSTALLATION CHART (Fig. 11)
i. Inlet water pressure is more than 30 P.S.I. OR
ii. Height of water-tank is more than 70 ft. from the water heater OR
iii. Water tank is situated more than 5 floors from the water heater. In such a
case if possible remove the vent nut and extend the vent pipe up to the top
level of overhead water supply tank.
INSTALLATION CHART (Fig. 12)
i. Inlet water pressure is more than 30 P.S.I. OR
ii. Height of water-tank is more than 70 ft. from the water heater OR
iii. Water tank is situated more than 5 floors from the water heater. In such a
case remove the vent plug and fix the accessories like Dead weight valve
(DWV) and / or Vacuum relief valve (VRV) on the vent nut through union.
Bajaj Horizontal water heaters in 15L and 25L capacity are now available with easy conversion facility. These models
can be converted easily from wall mounting to floor mounting and vice versa.
CONVERSION OF WALL MOUNTING TO FLOOR MOUNTING: Remove the mounting brackets by unscrewing the
bolts. With spanner. Now fix the brackets to the six holes meant for floor mounting by tightening the six bolts with the
help of plane and spring washers.
For changing the mounting arrangement from floor to wall. Repeat the above procedure. The position of holes for wall
mounting and floor mounting are clearly marked on the water heater. Floor and wall mounting positions are shown in
Fig. 4 and Fig. 5 respectively.
Pre and Post operative care
bajaj electricals limited Page 8 of 8
Precautions:
1. Read Installation and operating instructions carefully.
2. Get a qualified plumber/electrician to install the unit.
3. THE INLET VALVE SHOULD ALWAYS BE KEPT OPEN.
4. To minimise scaling of heating element, which happens more in areas with hard water, simply lower the
setting of the thermostat a little. Drain the water periodically. However this should be done through a
qualified technician only.
5. Scaling of the heating element can be removed by scrapping or by using a very dilute solution of hydrochloric
acid.
6. Always get the unit serviced once in two years.
7. Use genuine spare parts when replacement is necessary.
8. Switch OFF the power supply to the unit and drain out the water when the heater unit is not in use. This
prevents scaling of element and increases its life.
9. In case the red lamp glows ON do not operate the unit by resetting the thermal cut-out. What you
should do is contact the nearest Bajaj sales and service station to check if there is a fault.
10. Always drain out the water when i) the unit has to be serviced OR ii) when the unit is not in use for extended
periods. Use the drain pipe provided separately to drain out the water.
11. In case of any problem with the heater contact the nearest Bajaj sales or service centre.
12. Be very sure that you do not increase the setting of the thermostat more than the pre-fixed temperature.
DON'TS
1. Safety valve, thermostat and thermal cut-out are used to control temperature and pressure.
These are very sensitive and pre-set devices. Do not tamper with them or try to change their
settings. This could prove hazardous and should be strictly avoided.
2. Do not switch ON the heater till it is completely filled with water.
3. When the heater is connected directly to the municipal water supply, do not fit a non-return valve (NRV) at
the inlet. Instead install a VRV (Vacuum Relief Valve) at the inlet or the vent pipe.
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