CHOICE RSTAT8
Digital Programmable Room
Thermostat
(2 wire, battery powered)
Introduction
The Choice RSTAT8 is a 2 wire, battery powered
programmable room thermostat. Being battery powered,
these models are suitable for replacing most existing
room thermostats.
The thermostat allows you to program and regulate your
heating system using up to 6 programmable events per
day.
The thermostat is easy to set up and provides clear
feedback to the user of the current time and temperature
and depending on the program settings will switch the
boiler or zone valve appropriately.
Features
•
24 or 7 day programmable
•
Default adjustable program
•
Permanent hold temperature
•
Timed hold temperature
•
Temporary temperature override
•
Automatic Summer/Winter time change
•
Low battery voltage indication
•
Button press back-light operation
Installation
This product must be installed by a competent
person in line with the latest IEE regulations.
Isolate mains before commencing installation of the
product.
Using a screwdriver carefully depress the locking tab
at the top and separate the back plate from the fascia.
Unscrew and remove terminal cover to gain access to the
terminals.
Direct Wall Mounting
To ensure its correct operation the thermostat should be
mounted or situated approximately 1.3 metres above the
floor on an internal wall and should be positioned away
from direct sunlight, heat sources and drafts.
Wiring Box Mounting
The thermostat may be fitted directly on to a single gang
steel flush wiring box. It must not be positioned on an
unearthed metal surface.
Example circuit diagrams for typical installations are
shown below. For reasons of space and clarity not every
system can be shown
Insert Batteries
With the fascia unclipped from its backplate, fit supplied
AA batteries into the battery compartment shown. All LCD
data will flash. Press SET to stop the flashing.
Refit fascia to backplate by first locating bottom catches
and closing into position at the top.
Test Process
Press
+
or
-
buttons to temporarily adjust the set temper-
ature to stimulate product operation. A heating symbol
is displayed when the room temperature is below the set
temperature indicating the thermostat is calling for heat
from the boiler. Check the operation. Press
SET
to revert
to program operation.
User Instructions
What is a programmable room thermostat?
...an explanation for householders.
A programmable room thermostat is both a programmer
and a room thermostat. A programmer allows you to
set ‘ON and OFF’ time periods to suit your lifestyle. A
room thermostat works by sensing the air temperature,
switching on the heating when the air temperature falls
below the thermostat setting and switching it off once the
set temperature has been reached.
So, a programmable room thermostat lets you choose
what times you want the heating to be on, and what
temperature it should reach while it is on. It will allow you
to select different temperatures in your home at different
times of the day (and days of the week) to meet your
particular needs.
Turning a programmable 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 the boiler and
radiators. Neither does the setting affect how quickly
the room cools down. Turning a programmable room
thermostat to a lower setting will result in the room being
controlled at a lower temperature, and saves energy.
The way to set and use your programmable room
thermostat is to find the lowest temperature settings that
you are comfortable with at the different times you have
chosen, and then leave it alone to do its job. The best
way to do this is to set low temperatures first, say 18ºC
and then turn them up by one degree each day until you
are comfortable with the temperatures. You won’t have
to adjust the thermostat further. Any adjustments above
these settings will waste energy and cost you more money.
If your heating system is a boiler with radiators, there
will usually be only one programmable 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 chose 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.
The time on the programmer must be correct. The
RSTAT9 automatically adjusts between spring and autumn
at the changes between Greenwich Mean Time and British
Electrical Connections
Once connections are made ensure you refit &
screw the terminal cover back into place.
Choice RSTAT8 controlling a typical combination boiler
installation - please refer to boiler manufacturers instruc-
tions
Choice RSTAT8 replacing a conventional room thermostat
on a fully pumped system with an existing programmer
and 3 port mid-position valve.
Choice RSTAT8 replacing a conventional room thermostat
on a fully pumped system with an existing programmer
and two spring return valves with auxiliary switches.
Choice RSTAT8 controlling a secondary heating zone on a
pumped system with existing programmer and two spring
return valves with auxiliary switches.
Choice
Rstat 8
Fit & forget...
