Heatrod Elements Ltd . Holloway Drive . Wardley Industrial Estate. Manchester . M28 2DP
Document Ref. M -017 Issue 1
Fing Instrucons for Immersion Heater Types :
Heaters Having Part No. Prefix HExxxA HExxxB HExxxC Heaters Conform to EN60335.2.73
For further informa&on on the HWA Charter
Membership, please refer to the HWA website
hotwater.org.uk
1. Check that the heater ra&ng label shows the voltage that conforms to your mains supply.
2. Install the heater into the water tank or cylinder using the O-ring or gasket supplied. Use a shaped immersion heater
spanner- &llsons should not be used. The heater may be installed into a tank of any size, suitable to take this heater
when installed in a horizontal manner, the heater must operate below water level, such as a cistern-fed or mains regu-
lated tank, if applicable.
3. It is essen&al that the installer checks that the water level within the tank or cylinder is such that the water will al-
ways fully cover the hea&ng element by a depth of at least 100mm. Under NO circumstances must the heater be
allowed to run dry – serious damage may result to the heater in addi&on to danger of personal injury and damage to
property.
4. Check the heater for possible water leakage before moving on to the wiring stage.
See overleaf for schemac wiring diagram.
5. The heater is to be wired with cable having a minimum size of 1.5 sq mm., 90ºC elastomer insulated H05BN4-F
sheathed cable to B 6500. The heater MUST be fully earthed and wired through a double pole switch having a contact
separa&on of at least 3mm in accordance with the wiring rules. Ensure all terminal connec&ons are securely made and
there are no loose strands. Do not use excessive force when &ghtening terminals.
Warning : Before making any adjustments within the heater terminal cover isolate the heater from the mains elec-
tricity supply. DO NOT COVER the heater cap.
This appliance is not intended for use by persons (including children) with reduced physical sensory or mental capa-
bilies or lack of experience and knowledge unless they have been given supervision or instrucon concerning use
of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not
play with this appliance.
6. In the event of the manually rese>able cut-out within the thermostat opera&ng range, isolate the heater from the
mains supply before removing the terminal cover. Inves&gate and iden&fy the cause for the opera&on of the cut-out,
and rec&fy if possible before manually rese?ng the device by pressing the small bu>on located on the top of the ther-
mostat housing. At the same &me, to prevent re-occurrence, it is advisable to turn down the temperature se?ng on the
thermostat to around 55°C.
It must be noted that if the cylinder is also heated by a secondary source such as solar-energy, or by an oil or coal fired
boiler producing heat higher than the cut-out pre-set temperature, this can also cause the cut-out to operate. It is not
recommended that the thermostat is set higher than 60°C. Refer to FAQ’s website.
7. Important : It is not necessary for the heater to be removed to rec&fy any problems with the thermostat/cut-out. If
the fault persists, the device can be replaced. Replacement thermostats can be obtained from the immersion heater
manufacturer using the details overleaf.
8. All heaters conform with EEC Direc&ve 76/889 for Radio Interference and comply with B 800:1977
Heatrod Elements Ltd . Holloway Drive . Wardley Industrial Estate. Manchester . M28 2DP
Document Ref. M -017 Issue 1
Fing Instrucons for Immersion Heater Types :
Heaters Having Part No. Prefix HExxxA HExxxB HExxxC Heaters Conform to EN60335.2.73
For further informa&on on the HWA Charter
Membership, please refer to the HWA website
hotwater.org.uk
1. Check that the heater ra&ng label shows the voltage that conforms to your mains supply.
2. Install the heater into the water tank or cylinder using the O-ring or gasket supplied. Use a shaped immersion heater
spanner- &llsons should not be used. The heater may be installed into a tank of any size, suitable to take this heater
when installed in a horizontal manner, the heater must operate below water level, such as a cistern-fed or mains regu-
lated tank, if applicable.
3. It is essen&al that the installer checks that the water level within the tank or cylinder is such that the water will al-
ways fully cover the hea&ng element by a depth of at least 100mm. Under NO circumstances must the heater be
allowed to run dry – serious damage may result to the heater in addi&on to danger of personal injury and damage to
property.
4. Check the heater for possible water leakage before moving on to the wiring stage.
See overleaf for schemac wiring diagram.
5. The heater is to be wired with cable having a minimum size of 1.5 sq mm., 90ºC elastomer insulated H05BN4-F
sheathed cable to B 6500. The heater MUST be fully earthed and wired through a double pole switch having a contact
separa&on of at least 3mm in accordance with the wiring rules. Ensure all terminal connec&ons are securely made and
there are no loose strands. Do not use excessive force when &ghtening terminals.
Warning : Before making any adjustments within the heater terminal cover isolate the heater from the mains elec-
tricity supply. DO NOT COVER the heater cap.
This appliance is not intended for use by persons (including children) with reduced physical sensory or mental capa-
bilies or lack of experience and knowledge unless they have been given supervision or instrucon concerning use
of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not
play with this appliance.
6. In the event of the manually rese>able cut-out within the thermostat opera&ng range, isolate the heater from the
mains supply before removing the terminal cover. Inves&gate and iden&fy the cause for the opera&on of the cut-out,
and rec&fy if possible before manually rese?ng the device by pressing the small bu>on located on the top of the ther-
mostat housing. At the same &me, to prevent re-occurrence, it is advisable to turn down the temperature se?ng on the
thermostat to around 55°C.
It must be noted that if the cylinder is also heated by a secondary source such as solar-energy, or by an oil or coal fired
boiler producing heat higher than the cut-out pre-set temperature, this can also cause the cut-out to operate. It is not
recommended that the thermostat is set higher than 60°C. Refer to FAQ’s website.
7. Important : It is not necessary for the heater to be removed to rec&fy any problems with the thermostat/cut-out. If
the fault persists, the device can be replaced. Replacement thermostats can be obtained from the immersion heater
manufacturer using the details overleaf.
8. All heaters conform with EEC Direc&ve 76/889 for Radio Interference and comply with B 800:1977
