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Manual Horstmann ChannelPlus H27XL Thermostat

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Manual

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 RESETTINGTHEPROGRAMMERsection 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.

QUESTIONSANDANSWERS

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 BATTERYOFF position. These are both to prolong the battery life.

16 SET slider switch

17 SET Positions

LCD DISPLAYFEATURES

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

3 2

Internal Slide Switch -

located under front cover

LED INDICATOR

10 Central heating ON indicator

11 Hot water ONindicator

EASY TOUSE PROGRAMMEANDFEATUREBUTTONS

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]k

Website: www.horstmann.co.uk

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Here you can share what you think about the Horstmann ChannelPlus H27XL Thermostat. If you have a question, first carefully read the manual. Requesting a manual can be done by using our contact form.

david jolley 27-10-2021
My H27XL programmer is 10 years old and has stopped operating my heating and hot water and . date / time still working. Is it possible for a DIY person to simply swap for a new unit and reconnect to the mains? thanks

reply | This was helpful (0)

Eddie Myson 28-10-2023
I wish to re-adjust the time on my H27XL Plus controller but do not have a slider bar under the cover allowing me to select which section of the programme I want to adjust i.e. only the time

reply | This was helpful (0)

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Specifications

Brand	Horstmann
Model	ChannelPlus H27XL
Category	Thermostats
File type	PDF
File size	0.21 MB

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Frequently Asked Questions about Horstmann ChannelPlus H27XL Thermostat

Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.

What is the dead zone of a thermostat? Verified

Many modern thermostats have a dead zone. If the temperature deviates less than 4°C from the set temperature, the system will not heat or cool. This so called dead zone of the thermostat prevents the system from turning on and off too often, saving energy.

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What is the best place to mount a thermostat? Verified

The best place for a thermostat is approximately 1,5 meter above the ground. Never place the thermostat nead a radiator or other heat emitting equipment or in direct sunlight. Choose a room that is used often. In most cases this is the living room.

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