Honeywell Sundial RF2 Y9520Z Bruksanvisning
                    Honeywell
                    
                    Temperaturregulator
                    
                    Sundial RF2 Y9520Z
                
                                
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User Guide
Y9520Z Sundial RF2 Pack 5
How to use:
  ST9520C Wireless Enabled 2 zone Programmer
  DT92E Wireless Room Thermostats
  BDR91T Wireless Enabled Relay Box (if installed)
System Components
Energy Efficiency and the Environment
Home energy use is responsible for more than ¼ of the total UK carbon emissions 
which  contribute  to  climate  change.  Heating  and  hot  water  systems  based  on 
boilers  account  for    of  this  figure,  so  it  is  important  to  understand  how  your 
controls can help to maximize energy efficiency while maintaining your comfort.
Your  Programmer  should  be  used  in  conjunction  with  appropriate  temperature 
controls. In order to save energy the following general points should be observed:
1.  Ensure your system contains room thermostats in 2 seperate zones, and that 
both  are  set  to  appropriate  temperature  levels:  typically  20°C  for  the  main 
occupied zone and 18°C for the less occupied zone (typically the bedrooms). 
2. 
Programme your heating and hot water to be off when you are not in the house. If 
you are concerned about possible frost damage to any exposed pipe work, it is 
advisable to fit a frost protection system – your installer can advise you about this.
3.  Think  about  how  you  use  your  domestic  hot  water  –  if  you  have  a  storage 
system, it is not necessary to have this switched on all the time, even when you 
are in the house.
4.  Consider  the  heat  up  times  required  for  your  central  heating.  Every  home 
responds differently when the heating is switched on. Adjust the start time so 
that you are not cold when you get up in the morning. A shorter heat up time is 
required for other heating periods.
5.  In  the  evening,  when  the  house  is  up  to  temperature,  it  is  often  possible  to 
switch off the heating up to an hour before you go to bed, without any noticeable 
reduction in comfort.
This document is to be left with the user
and forms part of a Home Information Pack
This section is to be completed by the Installer
Honeywell Control Systems Ltd.
Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com
50047645-006 A
© 2011 Honeywell International Inc.
PLEASE RESPECT YOUR ENVIRONMENT!
Take care to dispose of this product and any 
packaging or literature in an appropriate way
WHAT IS A PROGRAMMER?
...an Explanation for Householders (as recommended by the Energy Savings Trust)
Programmers allow you to  set  ‘On’ and ‘Off’ time  periods. Some models switch the central heating and 
domestic hot water on and off at the same time, while others allow the domestic hot water and heating to 
come on and go off at different times. Set the ‘On’ and ‘Off’ time periods to suit your own lifestyle. On some 
programmers you must also set whether you want the heating and hot water to run continuously, run under 
the chosen ‘On’ and ‘Off’ heating periods, or be permanently off. The time on the programmer must  be 
correct. Some types have to be adjusted in spring and autumn at the changes between Greenwich Mean 
Time and British Summer Time. You may be able to temporarily adjust the 
heating programme, for example, ‘Override’, ‘Advance’, or ‘Boost’. These 
are explained in the manufacturer’s instructions. The heating will not work 
if the room thermostat has switched the heating off. And, if you have a hot-
water cylinder, the  water heating will not work  if the cylinder thermostat 
detects that the hot water has reached the correct temperature.
WHAT IS A ROOM THERMOSTAT?
...an explanation for Householders (as recommended by the Energy Savings Trust)
A room thermostat simply switches the heating system on and off as necessary. It works by sensing 
the  air  temperature,  switching  on  the  heating  when  the  air  temperature  falls  below  the  thermostat 
setting, and switching it off once this set temperature has been reached. Turning a room thermostat to 
a higher setting will not make the room heat up any faster. How quickly the room heats up depends on 
the design of the heating system, for example, the size of boiler and radiators. Neither does the setting 
affect how quickly the room cools down. Turning a room thermostat to a lower setting will result in the 
room being controlled at a lower temperature, and saves energy. The heating system will not work if 
a time switch or programmer has switched it off. The way to set and use your room thermostat is to 
find the lowest temperature setting that you are comfortable with, and then leave it alone to do its job. 
The best way to do this is to set the room thermostat to a low temperature – say 18ºC – and then turn 
it up by one degree each day until you are comfortable with the temperature. You won’t have to adjust 
the thermostat further. Any adjustment above this setting will waste energy and cost you more money.
If  your  heating  system  is  a  boiler  with  radiators,  there  will  usually  be  only  one  room  thermostat  to 
control  the  whole  house.  But  you  can  have  different  temperatures  in  individual  rooms  by  installing 
thermostatic radiator valves (TRVs) on individual radiators. If you don’t have TRVs, you should choose 
a temperature that is reasonable for the whole house. If you do have TRVs, you can choose a slightly 
higher setting to make sure that even the coldest room is comfortable, then prevent any overheating 
in other rooms by adjusting the TRVs.
Room thermostats need a free flow of air to sense the temperature, so they must not be covered by 
curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent the 
thermostat from working properly.
Location
ST9520C
DT92E
Zone 1
(typically in living room or hallway)
DT92E
Zone 2
(typically in bedroom or upstairs hallway)
BDR91T
(If installed, typically next to boiler)
Produktspecifikationer
| Varumärke: | Honeywell | 
| Kategori: | Temperaturregulator | 
| Modell: | Sundial RF2 Y9520Z | 
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