HouseTech Househeat FHT80B User manual

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User manual
Betjeningsvejledning
GB Heating control set
Page 2-47
DK Househeat komfortsystem
Side 48-83

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1st English edition September 2008
Documentation © 2008 Housetech
All rights reserved. This handbook must not be reproduced in
any form, even in excerpts, or duplicated or processed using
electronic, mechanical or chemical procedures without written
permission of the publisher.
This handbook may contain mistakes and printing errors. The
information in this handbook is regularly checked and correc-
tions made in the next issue. We accept no liability for technical
mistakes or printing errors, or their consequences.
All trademarks and patents are acknowledged.
Printed in Hong Kong
Modications due to technical improvements may be made
without prior notication.
45666 Y2008 V2.0
These operating instructions belong with this product. They
contain important information for putting it into service and
operating it. This should be noted also when this product is
passed on to a third party.
Therefore look after these operating instructions for future
reference!

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Table of Contents
Page
1. Intended use ........................................................................................5
2. Scope of supply...................................................................................6
3. General information..........................................................................7
4. Safety instructions .............................................................................9
5. Inserting the batteries into the “FHT80B”
heating control..................................................................................10
6. Wall mounting of the “FHT80B“ heating control...................11
7. Setting of date and time................................................................13
8. Mounting the “FHT8V” valve operating mechanism ..........16
9. Programming the system..............................................................19
a) Setting of comfort temperature and
lowering temperature.....................................................................19
b) Setting/changing the week prole.......................................20
c) Modes of operation.....................................................................23
d) Key lock (for keys and selection wheel) ..............................25
e) Switching between comfort temperature and
lowering temperature.....................................................................25
f) Heating pause ...............................................................................25
g) Closing the valve .........................................................................26
h) Emergency operation of the
valve operating mechanism.........................................................27
10. Special functions ................................................................................28
11. Replacing of batteries.......................................................................40
a) “FHT80B” heating control..........................................................40
b) “FHT8V” valve operating mechanism...................................41
12. Troubleshooting .................................................................................42
13. Handling................................................................................................43
14. Maintenance and cleaning .............................................................43

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15. System range information...............................................................44
16. Technical data .....................................................................................46
17. Disposal..................................................................................................47

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1. Intended use
The entire radio-controlled radiator thermostat system
comprises two components:
• the “FHT80B” heating control, and
• the “FHT8V” valve operating mechanism
The system is used for temperature control in single rooms
where the heat that dissipates from the radiators is con-
trolled by reducing the ow of hot water in the heating sys-
tem.
The “FHT80B” heating control measures the room temperature
by means of an integrated sensor and transmits the correspond-
ing control data to the “FHT8V” valve operating mechanisms.
Any other use (e.g. in cooling systems, oor heating sys-
tems, etc.) is not permitted and may lead to severe dam-
age.

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2. Scope of supply
• “FHT80B” heating control
• Wall-mounting set for heating control (screws & dowels)
• “FHT8V” valve operating mechanism
• Valve adaptors for “Danfoss” valves
(additional valve adaptors for valves of other manufactur-
ers may be purchased separately)
• Operating instructions

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3. General information
Compared with simple mechanical thermostats the radio-
controlled radiator thermostat system has a number of ad-
vantages:
• the separation into radiator-mounted valve operating mech-
anisms and freely positionable operation and control units
(e.g. the “FHT80B” heating control which is part of the scope
of supply) makes it possible to perform settings easily.
• the programming option makes it possible to adapt the
system to the lifestyle of its users, so that the room is al-
ways comfortably warm when it is used. When the room
is not used, the temperature may be reduced automati-
cally to save energy, i.e. the often cumbersome manual
opening and closing of heating valves is no longer re-
quired.
• The system is equipped with an integrated calcication
protection. Once every week (time can be set) the valve
operating mechanism opens and closes the valve to pre-
vent blocking of the valve by lime deposits.
a) Operating principle
In the “FHT80B” heating control the room temperature is mea-
sured and compared to the desired temperature (set either by
means of the time program or manually).
The dierence is used to calculate how far the valve has to
be opened or closed to obtain the desired temperature. In
a time interval of approx. two minutes commands are ra-
dio-transmitted to the “FHT8V” valve operating mechanism
mounted on the radiator. This valve operating mechanism
then reduces or increases the heat.
Heating up of a room takes some time, depending on the size

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of the radiators. If the desired temperature is changed, the room
temperature changes with a certain delay. Deviations between
the desired value and the room temperature may also be caused
by various disturbance variables, e.g. draughts, other sources of
heat in the room, or an insucient supply of heat by the heating
boiler. Temperature measurement within the control is very ex-
act (deviation <1K). To avoid any unnecessary operation of the
valve, e.g. when the room temperature changes temporarily be-
cause a door is opened, the measured values of several mea-
surements are averaged.
b) Safety code
The radio signal is protected by a safety code consisting
of two parts. This safety code protects the system against
interference from other radiosystems and ensures that sev-
eral radio-controlled radiator thermostat systems can be
operated separately in a household. Each part of the code
comprises 100 setting options. This means that there are
10,000 dierent safety codes available. To ensure commu-
nication between the heating control and the valve operat-
ing mechanism/s the same safety code has to be set for all
devices in a room.
Ex works the set consisting of heating control and valve
operating mechanism is protected by a randomly as-
signed safety code, the valve operating mechanism is
preset to the safety code of the heating control. If you
want to use additional valve operating mechanisms on
one heating control (maximum number is 8) the num-
ber of valve operating mechanisms has to be set on the
heating control, and the safety code has to be transmit-
ted to the valve operating mechanism.

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4. Safety instructions
The warranty will lapse for damage due to non-com-
pliance with these operating instructions. We shall
not be held liable for any consequential damage
or loss! We shall not accept liability for damage to
property or personal injury caused by incorrect han-
dling or non-compliance with the safety instructions.
Any claim to warranty will lapse in such cases.
a) General
Do not use this product in hospitals or medical institutions.
The product does only emit relatively weak radio signals.
These radio signals could, however, lead to malfunctions in
life-supporting systems. The same may possibly apply
to other areas.
The product must only be used in dry indoor areas, it must
be protected from moist and water.
The product is not a toy and must be kept out of the reach
of children.
For safety and licensing (CE) reasons, unauthorised con-
version of and/or modications to the product are not per-
mitted.
Do not leave the packaging material lying around carelessly.
Plastic lm and/or bags, polystyrene parts, etc. can be dan-
gerous in the hands of children.
Handle the product with care. It can be damaged through
impact, blows, or by being dropped even from a low
height.
b) Batteries and accumulators
• Keep batteries/accumulators out of the reach of children.
• Make sure to insert the batteries/accumulators with the

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correct polarity.
• Do not leave the batteries lying around in the open; there
is a risk of them being swallowed by children or pets. If
swallowed, immediately contact a doctor.
• Leaking or damaged batteries/accumulators may cause
burning if they come into contact with the skin. For this
reason you should use suitable protective gloves when
handling batteries.
• Do not short-circuit batteries/accumulators, and do not
throw batteries/accumulators into a re. There is a risk of
explosion!
• Do not disassemble batteries/accumulators!
• Do not recharge normal batteries. There is a risk of explo-
sion!
• In case of longer periods of non-use (e.g. during stor-
age) remove the inserted batteries/accumulators to avoid
damage by a leaking battery/accumulator.
5. Inserting the batteries into the
„FHT80B“ heating control
• Slide down and remove the wall holder on the back of the
heating control.
• Slide down and remove the cover of the battery compart-
ment (in direction of the imprinted arrow on the cover).
• Insert two AA batteries; pay attention to the correct po-
larity. Look into the battery compartment for an illustra-
tion of the correct polarity.
We recommend to use high-quality alkaline batteries
only. Operation of the heating control using accumula-
tors or conventional zinc-carbon batteries is possible,
operating time and radio range of the heating control
will, however, be reduced.