BATTERY
SERVICE AND REPAIR
This programmer is NOT user serviceable. Please do not dismantle the unit.
In the unlikely event of a fault developing please refer to the RESETTING THE PROGRAMMER section of
this user guide located on page 2. If this fails to resolve the problem please contact a local heating
engineer or a qualified electrician.
QUESTIONS AND ANSWERS
The display only reads bAt
The unit display has become frozen
The indicator neon fails to illuminate on
Hot Water or Central Heating channel
The indicator neon will illuminate but
the pump and/or boiler fails to
operate
There is no display on the
programmer
How do I know if the programmer is
still under warranty
How is the programmer removed from
the wall
When setting the programme times, the
setting ‘bounces’ by 10 minute periods
Turn the battery on.The switch on the rear of the unit must be in either the Fully
Pumped or Gravity position.
This could be due to local electrical interference
Using the RESET procedure may rectify the fault.
Using the RESET procedure may rectify the fault. If the problem persists the programmer
will need replacing.
This may indicate a problem elsewhere in your system;
E.g. A zone valve, etc. please contact a registered installer for advice.
Try the RESET procedure on page 2, if this fails to rectify the problem please have the
mains supply checked
The ChannelPlus XL range comes with a 5 year guarantee from the date of manufacture.
This date is located on the rear of the unit, indicated by a month over a year
WARNING:
The ChannelPlus programmer must only be removed from it’s backplate by
either a qualified electrician or heating engineer; The programmer plugs in to a 9 pin
backplate located on the rear of the unit and is secured using 2 screws located on the
top surface of the unit. Undo these screws and pull forward and down in an arc motion
This indicates that you have reached an existing set time period, you will be unable to
set a new ON/OFF time unless there is an alteration to the existing timed period
LEAFLET No P32635
ISSUE 3
Page 4
The following are some of the easy to operate features:-
Flexible 7 Day Control
1 or 2 Hour Boost on each channel
Independent timing on Hot Water and Heating
Advance control gives instant On/Off override
Up to 3 On/Off periods per channel in each 24 Hr operation.
Programme options: Auto / All day / On constantly / Off
FULLY PUMPED OR GRAVITY SYSTEM
The installer will have set the programmer to suit the installed system. If this is a Fully pumped
system this will allow independent control of the Central heating and Hot water, however on a Gravity
system the Central heating and Hot water are linked so that it is not possible to use the Central
heating independently. This will allow only one common time setting for both Hot Water and Central
Heating.
The programmer is fitted with a non-rechargeable, long life battery, which will maintain the
programmed time settings for a minimum of ten months with the supply disconnected.
THIS SHOULD BE SUFFICIENT TO COVER POWER INTERRUPTIONS DURING THE LIFE OF THE UNIT.
During power interruptions the display will be blank, after 3 days the current time of day will be lost.
If the programmer is not to be used for a long period of time, the switch on the rear of the unit
should be returned to the BATTERY OFF position. These are both to prolong the battery life.
16 SET slider switch
17 SET Positions
LCD DISPLAY FEATURES
1 Current
TIME OF DAY
2 Day of Week Indicator
3 Switch time SETTING indicator
4 ADVANCE symbol
5 BOOST symbol
6 Current Hot water programme
7 Current Central heating programme
8 Next Central heating switch time
9 Next Hot water switch time
1
6
5 4
3
2
8
7
9
10
12
11
14
13
15
Internal Slide Switch -
located under front cover
17
16
LED INDICATOR
10 Central heating ON indicator
11 Hot water
ON indicator
EASY TO USE PROGRAMME AND FEATURE BUTTONS
12 Central heating ADVANCE(ENTER) button
13 Hot water ADVANCE (PLUS) button
14 Central heating BOOST(COPY) button
15 Hot water BOOST (MINUS)button
Both the Central heating and Hot water SELECT
buttons are located under the front cover
Page 1
Horstmann’s ChannelPlus H27XL - Two Channel Programmer Offers up
to three programmed operating periods per day, seven days a week,
with independent Boost and Advance control on Fully Pumped Systems.
Can be used as a direct replacement for Horstmann 425 Diadem, Tiara
and H527(Allowing for new programmer position).
Horstmann Controls Limited
Bristol
BS4 1UP
Email: [email protected]
Website: www.horstmann.co.uk
