Electronic ush mounted
FMT230D
dial setting room thermostat
with LCD display
User & Installation Instructions
®
Certification Mark
GB
Index
Index
Installation Instructions 3-11
User Instructions 12-15
2
Installation Instructions
Features FMT230D
Temperature Range 5 - 30°C
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Setting dial and LCD display
Chrono-proportional or On/Off control
Heat or cool operation
Output relay contact rating 10-264 Vac, 50/60 Hz, 3 (1) A
Switching action 1 SPDT Type 1B
Power supply 230 Vac ± 15%, 50/60 Hz
Maximum ambient temp 45°C
Rated Impulse Voltage 2.5kV
Ball Pressure Test 75°C
Dimensions (mm)
Pollution Situation
85 wide x 85 high x 35 deep
O
O
O
Degree 2
Installation Instructions
3
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Installation Instructions
Mounting
The product is designed to mount on to a standard one-gang
fl ush mounted electrical accessory box having a minimum
depth of 25mm. Fixing screws and screw blanking caps are
provided with the product.
Rear View of Thermostat
Terminal Blocks
M3.5 screws
4
Installer DIL
Switches
Blanking Caps
Fix at a height of 1.5m approx from the fl oor, away from
draughts or heat sources such as radiators, open fi res or direct
sunlight.
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Installation Instructions
Please Note:
This product should only be installed by a qualifi ed electrician or
competent heating installer and should be in accordance with the
current edition of the IEEE wiring regulations.
5
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Installation Instructions
Wiring
6
NC
NO
COM
ELECTRONICS
LN
LN
230 Vac
DIL switch settings
Slide the DIL switches to the settings required.
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ON/OFF - boiler switches ON when below set temperature and
OFF when above.
CHRONO regular intervals to maintain a set temperature, achieving a
constant ambient environment for the user.
R
use 6 cycles for radiator systems.
R
use 3 cycles for underfl oor heating.
R
use 9 or 12 cycles for warm air central heating or fan coil units.
energy saving feature which fi res the boiler at
Installation Instructions
7
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DIL Switch Settings
Installation Instructions
1
2
3
6/12 CYCLES
4
9/12 CYCLES
COOL
ON/OFF
HEAT
CHRONO
3/9 CYCLES
3/6 CYCLES
8
Mounting (continued)
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Installation Instructions
9
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Installation Instructions
Resetting the unit
When power is fi rst applied,
remove the dial and press the
RESET button for 2 seconds.
RESET
Button
10
Locking & Limiting *
Locking - setting the thermostat at a temperature which
cannot be altered by the user.
Limiting - allowing the user to alter the temperature within
a predefi ned range, which is less than the full range of the
product (i.e. between 18-22°).
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User Instructions
Note: A tamperproof dial is
available for the FMT230D.
Please contact the Danfoss
sales offi ce on 0845 1217 400
to order.
* The locking and limiting spring is supplied with the product
and needs to be fi tted by the installer.
11
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User Instructions
What is a room thermostat?
... an explanation for householders
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
12
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 timeswitch or programmer has
switched it off.
The way to set and use your room thermostat is to fi nd 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 18°C – 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.
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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 fl ow of air to sense the temperature,
so they must not be covered by curtains or blocked by furniture.
Nearby electric fi res, televisions, wall or table lamps may prevent the
thermostat from working properly.
User Instructions
13
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User Instructions
User Instructions
Display
The LCD displays actual room temperature until the setting dial
is moved.
LED Indicators
Power on - Green (left hand LED).
Thermostat output on - Red (right hand LED).
Setting the temperature
Turn setting dial to required temperature. The selected
temperature will fl ash in the LCD to signify it is showing set
temperature.
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After a short period the display stops fl ashing and shows actual
room temperature.
Thermostat status
A fl ame symbol (
) will be shown whenever the thermostat is
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in heating mode, a snowfl ake symbol (
thermostat is in cooling mode. To change mode please refer to
DIL switch setting on page 8.
) will be lit when the
User Instructions
15
www.danfoss.com/BusinessAreas/Heating
This product complies with the following EC Directives:
Electro-Magnetic Compatibility Directive.
(EMC) (2004\108\EC)
Low Voltage Directive.
(LVD) (2006\95\EC)
16
Part No 25937v01 01/08
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