Electronic 7 is supplying electricity to the immersion heater during the cheap-rate period.
Similarly the Boost On indicator will glow whenever the Boost is in operation.
With the Water Heater switch in the OFF position the indicator lights will still illuminate, However
there will no heating of the immersion elements. This is normal operation of the Electonic 7.
BATTERY RESERVE
This unit has a non-rechargeable long-life battery which will maintain the display and switch time
settings for approximately 2 years with the mains electricity supply disconnected. This should be
sufficient to cover all expected power interruption expected during the life of the unit.
SERVICE AND REPAIR
The HORSTMANN ELECTRONIC 7 is NOT USER SERVICEABLE
DO NOT TRY TO DISMANTLE THE UNIT
In the unlikely event of a fault developing please try RESETTING the unit,located on page 2 of this User
guide, if this fails to resolve the problem please contact a local Heating Engineer or Qualified Electrician.
There is no display on the Programmer
Ensure that there is mains supply and the battery switch on the rear of the unit
must be in either the GMT/BST or GMT ONLY position.
The unit display has become frozen
This could be due to local electrical interference. Using the RESET
procedure located on page 2 of this User guide may rectify the fault.
The indicator neon will illuminate but
Ensure that the Water Heater Switch on the front of the Electronic 7 is in the Timed
there is no hot water
position. If this fails to rectify the problem please contact a local heating engineer
or qualified electrician.
How do I know if the programmer is
The Electronic 7 comes with a 2 year guarantee from the date of
still under warrantee
manufacture. This date is located on the inside of the unit, indicated by a month
over a year.
The Off-Peak/Boost neon is ON
There could be a possible problem with the Electronic 7 or the immersion
constantly
elements, please contact a qualified electrician or heating engineer.
How can the Off-Peak Heating times be
Please refer to the Off-Peak Heating Programming section on page 2 of this User
The Off-peak heating period is
Please check the AM/PM settings on the current time and the Off-Peak Heating
occurring during the day.
Horstmann Controls Limited
Email: sales@horstmann.co.uk
Website: www.horstmann.co.uk
INDICATORS
The Horstmann Electronic 7 Water Heater Controller has been specially developed to give you
all the Hot water you want as cheaply and as conveniently as possible.
During the night, the water in your tank will be heated by cheap night-rate electricity, so that
you have a tank of hot water available for the morning.
Depending on the size of your tank and usage of hot water, this will usually last a day; you
can obtain more Hot water at any time by using the Boost button, to switch on the immer-
sion heater to suit your requirements. Alternatively, if you know you will require extra Hot
water every day, you can programme the boost to come on each day at a set time