Danfoss RET2001OT, TPOne-OT Data sheet

Data Sheet

RET2001OT & TPOne-OT

Electronic Room Thermostats

Application

RET2001OT

RET & TP room thermostats are used typically in
gas boiler and wall hung radiator heating sys­tems. The RET2001OT & TPOne-OT are sophisti­cated room thermostat which provide modulat­ing control of OpenTherm compatible gas boilers.

These thermostats exchange data with the boiler
they control as opposed to on/o commands. This
type of control, in addition to providing closer,
more accurate room temperature control, also
ensures that the ow temperature from the boiler
is modulated down to as low a level as prevailing
load permits. Compared to simple on/o
thermostats RET2001OT & TPOne-OT signicantly
increasing the proportion of the boiler operating
time that is spent in economic condensing mode.
These thermostats are fully compliant with the
OpenTherm communications protocol including
low load regulation.

Functions

Room Thermostat, RET2001OT

Temperature selection is digital from the setting
ring that circles the large easy to read backlit
display. RET2001OT includes a frost protection
feature as well as holiday mode with setback tem­perature for energy saving while you are away.

Additional features:

• Max. and min. temperature limit settings

• User selectable frost and holiday tempera­tures

TPOne-OT

Programmable Room Thermostat, TPOne-OT

TPOne delivers new levels of user friendly
interaction. The exible dot matrix display
uses easy read icons and text information to
provide feedback on status and settings to the
installer and user. When the display is activated
the backlight illuminates and guides are given
on what buttons will adjust temperatures or
navigate the setting menus.

The schedule setup is exible and users can
choose 24hr, 5-2day or full 7day programming
with optional 1, 2 or 3 heating periods.

Additional TPOne features include:

• Seperate user & installer setting menus

• Holiday scheduler

• Upper and lower temperature limits

• Capacitive touch button control

• Push button lock

• °C or °F Selectable display

• Audible button click (selectable)

• Frost protect temperature setting

• Clear text display (9 Languages)

• Bolier service timer

The RET & TPOne room thermostats combine
modern design with ecient heating control,
ease of operation and high quality construction
to help provide reliable home comfort.

TPOne Comfort Modes

VDSUM102

TPOne Programmable Room Thermostat
introduces the quick access Scenario interface.
To the left of the display are 4 dedicated user
buttons. As a programmable device heating is
controlled by a preset schedule but sometimes
our schedules change intermittently so we have
made it easy for the user to adapt their heating
to suit.

The Home, Away & Asleep buttons allow the user
to quickly change the current setting to either
save energy or deliver comfort when needed.

These manual overrides stay until the next
scheduled heating change so no need to
remember to switch back to automatic control.

The additional standby button also gives the
control to stop the heating completely, this
will save energy when airing the home or can
be used to switch o during Summer months
without having to change the schedule. Standby
remains until the user chooses to switch back on.

© Danfoss | ERC | 2019.05

Data Sheet RET & TP Electronic Room Thermostats

A

B

1

2

OpenTherm
connections
in boiler

External volt
free contactor
/ switch

Wires can

be crossed

OpenTherm
connections
in RET2001OT

Set-back
connections
in RET2001OT

A

B

OpenTherm
connections
in boiler

Wires can

be crossed

OpenTherm
connections
in TPOne-OT

ErP

5

Ordering

Technical specications

Product Typ e

Supply

voltage

Output Code no.

RET2001OT Room Thermostat 24 V DC BUS Data 087N6475

TPOne-OT

Programmable Room

Thermostat

3 V DC Data 087N7859

Feature RET2001-OT TPOne-OT

Dot Matrix LCD Display

with text menu

and capacitive touch buttons

Type

LCD backlit display

with push buttons

Setting temperature range 5 - 35°C
Operating temperature range 0 - 45°C
Fault indication Yes
LCD Backlight Yes
Output Data 24 V DC BUS
Battery Life - Min 2 years

Power Suppy 24 V DC power line from boiler

3 V DC Battery

2 x alkaline
Wiring non-polarised 2 wire bus
ErP class Class V (eciency gain 3%)
IP rating IP30 (installed)
OpenTherm software version v4.0
Low load control Yes
Approval CE marking, EN60730
Control pollution situation Degree 2
Rated impulse voltage 2.5kV
Ball hardness test 75°C
Software classication A

ErP Class

ERP Class

The products represented within this document are classied 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

Modulating Room Thermostat, for use with modulating heaters

An electronic room thermostat that varies the ow temperature
of the water leaving the heater dependent upon measured room
temperature deviation from room thermostat set point. Control is
achieved by modulating the output of the heater.

RE T2 001O T TPOne-OT

Wiring connections

Product

Class

V

Important - To avoid damage to Boiler and Thermostat, connect only to OpenTherm connections on
boiler, do not connect to any other power source.

Danfoss Limited

Heating Segment • heating.danfoss.co.uk • [phone]

Danfoss c an accept no respons ibility for pos sible errors in ca talogues, bro chures and other pr inted material. Da nfoss reserve s the right to alter its p roducts with out notice. This als o applies to
produc ts already on ord er provided that su ch alterations ca n be made without su bsequential cha nges being neces sary in speci cations alread y agreed.
All trade marks in this mate rial are proper ty of the respec tive companies . Danfoss and all Danf oss logotyp es are trademark s of Danfoss A/S. A ll rights reser ved.

© Danfoss | ERC | 2019.05

• E-mail: [e-mail]

AI306945861300EN-000101 | VDSUM102

Additional eciency

gain

3%