The Horstmann E7BXhas been designed to provide flexibility
to the consumer using Off-Peak electricity for Water heating.
It provides the facility to Boost your Hot water at any time
and provide cheap Hot water using the Off-Peak supply
whenever it is available.
FRONT VIEW OF E7BX
INSTALLATION AND CONNECTION SHOULD ONLY BE CARRIED OUT BY A SUITABLY QUALIFIED PERSON
AND IN ACCORDANCE WITH THE CURRENT EDITION OF THE IEE WIRING REGULATIONS.
WARNING:ISOLATE MAINS SUPPLY BEFORE COMMENCING INSTALLATION
BOOST FACILITY 2 HOUR
Whenever you require additional Hot water out side of an Off-Peak period, simply rotate the Boost
timer.
The Boost will automatically switch OFF at the end of the chosen Boost period, ensuring that you use
only the minimum of Standard Rate electricity required to meet your requirements.
NOTE.
On systems with dual or two separate immersion elements, the Boost supply activates the short or top
element. The Off-Peak rate supply activates the long or bottom element.
NEON INDICATORS
The E7BX has one indicating neon.
For installations with two immersion heaters the neon indicator will be illuminate only when power is
being supplied to the Boost element.
For installations with a single immersion heater the neon indicator will be illuminated when either the
Boost or Off Peak supply is activated.
ISOLATOR SWITCHES
The E7BX has a built in double pole isolator switche labelled timed and OFF.
For installations with two immersion heaters the OFF position will only isolate the Off Peak supply. An
additional switch, necessary to the installation, will switch off the supply to your Boost immersion
element.
For installations with a single immersion heater the OFF position will only isolate both the Off Peak
supply and the Boost immersion element. ( the neon is controlled via the Boost timer and will be lit
even with the isolator switch in the OFF position).
SERVICE AND REPAIR
The E7BX is NOT user serviceable. Please do not dismantle the unit.
In the unlikely event of a fault developing please contact a local heating engineer or a qualified
electrician.
Email: sales@horstmann.co.uk
Website: www.horstmann.co.uk
Horstmann Controls Limited
Bristol
BS4 1UP
LEAFLET No P30797
ISSUE 1
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