Danfoss RET1000MD Data sheet
Datasheet
1
2
3
4
Chrono
6 Cycles
3 Cycles
Delayed Start On
On/O
3/12 Cycles
12 Cycles
Delayed Start O
Function Setting Function
Time delay after time control
switch on, minutes
Temperature below thermostat setting, ⁰C
RET1000MD Delayed Start Room Thermostat
Features
RET1000MD Smart Room Thermostat combines
sleek modern design with high performing
energy saving control. The well-proportioned
dial and clear temperature scale makes setting
easy, including an easy to set upper and lower
temperature limiting feature. All RET1000
thermostats include stylish backlit LED icons
providing clear indication of power and output
status. As well as standard on/o control the
user can select to benet from Danfoss chronoproportional control. Normally set at installation
although easy to change via a DIP switch this
micro-processor based control system will deliver
increased comfort and improved economy.
When chrono-proportional mode is set, the
thermostat introduces a xed cycle rate on
the system and then determines the duration
of the On and O periods within each cycle in
proportion to load. The control algorithm used to
determine the on/o periods uses a proportional
+ integral (PI) routine to eliminate oset normally
associated with on/o or simple proportional
control.
Chrono-proportional control signicantly
improves comfort and generally improves boiler
eciency by optimising water temperature.
The RET1000MD is a smart room thermostat that
incorporates an additional energy saving delay
start feature, which delays the start-up of the
heating dependent upon how close to set-point
the room temperature is at the time heating is
scheduled to turn on.
Under most load conditions, this feature reduces
the number of hours per day that the system runs,
without creating any discomfort. This feature can,
if necessary, be cancelled if the user wishes to
override the delay period.
• Intelligent Delayed Start
• Selectable Chrono Proportional or On/O
control
• User Set Upper and Lower Temperature Limits
• Output On Indication
• Power Indication
Installer Settings
Delay Curve The RET1000MD intelligent room thermostat
RET1000MD
delays the start-up of the heating system by a
variable time period that is determined by the
dierence in the room temperature compared
to the temperature set on the thermostat. The
smaller the dierence, the longer the delay before
the heating is allowed to turn on. A built-in limit
ensures that the delay period cannot exceed 60
minutes.
© Danfoss HS | 09/2015 | 143v02 VDJTB202
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Datasheet RET1000MD Delayed Start Room Thermostat
ELECTRONICS
N
L
1
2
3
COM
ON
OFF
ELECTRONICS
N
L
1
2
3
4
N
L
TS715 si RET1000 MD
ErP
4
Specications and
Ordering Information
Product Conversion Table
ErP Class
Product
Class
Thermostat Features RET1000MD
Ordering codes 087N645400
Product Line 03
Type Dial Thermostat
Power Supply 230Vac, 50/60Hz
Output Volt free
Setting temperature range 5-30 °C
Operating temperature range 0-45 °C
Switch rating 3A at 230Vac
Switch type SPDT type 1B
IP Rating IP20
On/O Control Yes
Chrono-proportional control Yes
Dimensions (mm) H84 x W84 x D37
New Part Can Replace
RET1000MD RET-MD
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
IV
of the heater proportional to room temperature. TPI control strategy reduces mean water temperature, improves room temperature control accuracy and enhances system eciency.
Additional
eciency gain
2%
Wiring Details
RET1000 MD
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 | 143v02 VDJTB202
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