Danfoss FMT230D Data sheet
Datasheet
FlatStat - Type FMT230D
Flush Mounted Room Thermostat
Features
If set in chrono-proportional mode, the thermostat
imposes a xed cycle rate on the system and
then determines the duration of the On and O
periods within each cycle in proportion to the
load. The control algorithm, used to determine
the on/o periods within the chrono-proportional
function, uses a proportional+integral (PI) routine
to eliminate the oset normally associated with
on/o or simple proportional control.
Chrono-proportional control also signicantly
improves comfort and generally improves boiler
eciency by reducing mean water temperatures.
This model is ideal for use with system or
combination boilers and can be installed without
the need for complicated wiring or commissioning.
The FMT230D ush mount room thermostat
combines the ease of use of a setting dial with
accuracy and advanced features that are only
available from microprocessor based controllers.
Providing a 230volt supply is present, this unit can
be used to switch low voltage (voltage free) or
230v systems.
Installer Settings
The LCD display, which normally shows actual
room temperature, changes momentarily to
show set temperature whenever the setting dial
is moved.
This newly styled thermostat will t a standard
UK ush mounted electrical accessory box with
a minimum depth of 25mm. Flush mounting and
an ultra slim 16mm installed prole ensures the
thermostat seamlessly blends in with existing
decor and adds style to any home.
The FMT230D thermostat can be set up by the
installer to provide both traditional on/o control,
or more sophisticated chrono-proportional
control for increased comfort and energy savings.
DIL Switch Settings
GB
1
2
3
6/12 CYCLES
4
9/12 CYCLES
COOL
ON/OFF
HEAT
CHRONO
3/9 CYCLES
3/6 CYCLES
Flush mounted
Unobtrusive low-prole thermostat (16mm
installed)
Intelligent heating control for increased fuel
economy
Microprocessor accuracy
Setting dial with LCD temperature display
Range limiting
Tamper proof dial available
© Danfoss HS | 09/2015 | 722v02 VDRKN212
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Datasheet
L N
ELECTRONICS
L N
230 Vac
COM
NO
NC
Wall
depth
16mm
85mm
ErP
4
FMT230D Flush Mount Room Thermostat
Specication and
Ordering Details
ErP Class
Features FMT230D
Code No 087N774400
Temperature Range 5 - 30°C
Setting knob and LCD display
Chrono-proportional or On/O control
Heat or cool operation
Output relay contact rating 10-250 Vac, 50/60 Hz, 3 (1) A
Switching action 1 SPDT
Power supply 230 Vac ± 10%, 50/60 Hz
Maximum ambient temperature 45°C
Dimensions (mm) 85 wide x 85 high x 35 deep
ERP Class
The products represented within this document are classied according to, and allow completion of, the Energy
Related Product (ErP) Directive System Package che and the ErP system data label. ErP Labelling obligation is
applicable from 26th September 2015.
ErP Class Product Function and ErP Description
TPI Room Thermostat, for use with on/off output heaters
An electronic room thermostat that controls both thermostat
cycle rate and in-cycle on/o ratio of the heater proportional
IV
to room temperature. TPI control strategy reduces mean water
temperature, improves room temperature control accuracy and
enhances system eciency.
Product
Class
Additional eciency
gain
2%
Wiring Details
Dimensions
85mm
/min
25mm
85mm
Danfoss Ltd.
Ampthill Road
Bedford MK42 9ER
Tel: 01234 364621
Fax: 01234 219705
Email: ukheating@danfoss.com
Website: www.heating.danfoss.co.uk
Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already
on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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© Danfoss HS | 09/2015 | 722v02 VDRKN212
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