Innovative and Efficient Electric Heating Systems

Single Supply Storage Heaters – What is required?

ECOMBI HHR Lifestyle 1

Replacing a standard storage heater for a Elnur ECOHHR or Elnur ECOSSH and using a single supply.

1. There must be a single meter installed and the householder must be on an “unrestricted” E7 or E10 tariff variant from their energy provider, which allows the whole house supply to operate 24/7 and charge the off peak tariff price for all consumption during the off-peak period(s) and the higher tariff price during all other hours.
Note: The current energy supplier should be consulted to confirm if the meter is the correct type and if the tariff type as detailed above is in current operation or is available from them in their area.

2. With the correct meter installed and tariff in use, wiring changes can be done at the heating consumer unit or split load consumer unit where the storage heaters are connected. The supply to the storage heaters side of the consumer unit can now be changed to the same household supply. No timers or contactors are needed when supplying the heaters as all timings will be controlled at the storage heaters.
Note: It is important that the timing of the off peak period matches the timing set on the heaters otherwise running costs will be higher.

3. On the heaters:- The storage heater supply can be connected to the restricted terminals in the storage heater and the unrestricted terminals can then be linked to the restricted terminals. Spade connectors on the terminal block allows for easy link connection although wiring can also be made via the terminal block itself.
Note: Although the same cable flex and isolator switch from the old storage heater can be used we recommend replacing as a matter of course as you don’t know how long they have been used and would be the first point for failure.

Replacing a standard storage heater for a Elnur ECOHHR or Elnur ECOSSH and connecting to a THTC tariff.

This type of meter has three connections, one THTC economy supply, one 24hr supply and one 24hr economy supply designed normally for water heaters and panel heaters.

1. Wiring changes can be done at the heating consumer unit or split load consumer unit where the heaters are connected. You’ll need to disconnect the THTC supply to the storage heater side of the consumer unit and reconnect with the 24hr economy supply.
Note: With this supply being 24hr economy the default 00:00 to 07:00 economy timing on the heater can be used.

2. On the heaters:- The storage heater supply can be connected to the restricted terminals in the storage heater and the unrestricted terminals can then be linked to the restricted terminals. Spade connectors on the terminal block allows for easy link connection although wiring can also be made via the terminal block itself.
Note: Although the same cable flex and isolator switch from the old storage heater can be used we recommend replacing as a matter of course as you don’t know how long they have been used andwould be the first point for failure.

Note – In all cases when using a single supply connection for Elnur Ecombi HHR & SSH storage heaters, if a heater is required in a new location where no previous storage heater circuit exists, the new single supply circuit must come directly from the Distribution Board, solely serve the new storage heater, have a 20amp MCB and RCD protection. All new Electrical installations must be undertaken by a competent person, meet the current regulations and be tested/certified.