USERS INSTRUCTIONS
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
KNOW YOUR PROGRAMMER
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.
WATER HEATER CONTROLLER
FOR ECONOMY 7
AND WHITE METER TARIFFS
Off peak
Indicator
Water
Heater
Switch
TIMED BOOST SETTING
OFF TIME
ON TIME
There is no display on the Programmer
The unit display has become frozen
The indicator neon will illuminate but
there is no hot water
How do I know if the programmer is
still under warrantee
The Off-Peak/Boost neon is ON
constantly
How can the Off-Peak Heating times be
altered.
The Off-peak heating period is
occurring during the day.
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.
This could be due to local electrical interference. Using the RESET
procedure located on page 2 of this User guide may rectify the fault.
Ensure that the Water Heater Switch on the front of the Electronic 7 is in the Timed
position. If this fails to rectify the problem please contact a local heating engineer
or qualified electrician.
The Electronic 7 comes with a 2 year guarantee from the date of
manufacture. This date is located on the inside of the unit, indicated by a month
over a year.
There could be a possible problem with the Electronic 7 or the immersion
elements, please contact a qualified electrician or heating engineer.
Please refer to the Off-Peak Heating Programming section on page 2 of this User
Guide.
Please check the AM/PM settings on the current time and the Off-Peak Heating
times.
LEAFLET No P30909
ISSUE 7
PAGE 4
PAGE 1
With the Water Heater switch in the Timed position the Off-Peak indicator will glow whenever the
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.
INDICATORS
BOOST
SUMMER/
WINTER
HRS
MINS
MANUAL BOOST
TIMED BOOST
BOOST SELECTION
BUTTONS SITUATED BEHIND FLIP-DOWN COVER
BOOST SELECTION SLIDE SWITCH
Boost
Button
Boost
Indicator
Set Button
Horstmann Controls Limited
Bristol
BS4 1UP
Email: [email protected]
Website: www.horstmann.co.uk
Summary of Contents for Electronic 7
Page 3: ......
