Danfoss RT51, RT51-RF Data sheet
Datasheet
RT51 and RT51-RF
Day/Night Thermostat
with Manual Day/Night Selection
Features
The RT51 is a simple to use digital room thermostat
that incorporates a Day/Night feature. The "Night"
feature is manually initiated by the user, allowing
the building to be heated to a lower level overnight
or during unoccupied periods. Return to "Day"
temperature setting is also selected manually.
The thermostat incorporates a large easy to
read display that clearly shows the current room
temperature in large characters, together with the
required temperature in smaller characters. The
display also incorporates an additional character
that informs the user that the thermostat is in either
"Day" or "Night" operating mode.
During normal "Day" operation the user is able to
select the required temperature by using either the
V or W buttons. To enter "Night" mode both the V
and W buttons are pressed together. The user can
then adjust the required temperature using either
the V or W buttons. This temperature will then
be used during all subsequent "Night" periods,
unless changed by the user. The "Night" mode will
continue to operate until the user manually returns
the thermostat to "Day" mode by pressing both the
V and W buttons together for a second time.
The RT51-RF is an ideal control for use in situations
where it is not practical or acceptable to run
cables between the room thermostat and the
other control components in the system. Using
radio transmissions the RT51-RF communicates
instructions to a receiver unit, type RX, which can be
located up to 30 metres away from the thermostat.
Each RT51-RF thermostat has a unique digital
identity code which is learnt by the appropriate
channel of the receiver during commissioning.
The receiver unit is available in three versions,
o ering either one, two or three zones of control,
each zone requiring its own RT51-RF thermostat.
Any RT51-RF can be tuned or re-tuned to any
receiver channel.
The RT51-RF thermostat o ers identical functionalit y
to that of the hard-wired RT51 version, except that
the relay function is moved from the thermostat to
the RX receiver unit.
Thermostat Speci cations
Features RT51 RT51-RF
Order Code 087N699600 087N699900
Temperature Range Day: OFF, 5-30 °C Night: OFF, 5-30 °C
Heating thermostat with
manually selected Day/Night operation
User overrides Adjust "Day" temperature
Adjust "Night" temperature
Select "Day" or "Night" mode
Factory pre-set programme Day 20°C, Night: 15°C
Contact current rating 3 (1) A, 10-230 Vac N/A
Switching action SPDT N/A
Transmitter frequency N/A 433.92MHz
Transmitter range N/A 30 metres max.
Power supply 2 x AA/MN1500/LR6 alkaline batteries
Maximum ambient temperature 45°C
Dimensions (mm) 110 wide x 88 high x 28 deep
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Datasheet
RT51 and RT51-RF Day/Night Thermostats
Reciever Speci cations
(RF Models only)
Wiring Details
Receiver Features RX1 RX2 RX3
Order Codes 087N747600 087N747700 087N747800
Single channel receiver module,
works in conjunction with one thermostat
Two channel receiver module,
works in conjunction with two thermostats
Three channel receiver module,
works in conjunction with three thermostats
Transmitter code self learning feature
Receiver Frequencies 433.92 MHz
Supply Voltage 220/240 Vac, 50 Hz
Output relay current rating 3 (1) A
Output relay con guration
(commons linked internally)
Memory retention Memory retained electronically on power down
Dimensions (mm) 138 wide x 88 high x 32 deep
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1 x SPDT 1 x SPDT
1 x SPST
1 x SPDT
2 x SPST
RT51 RX1
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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 Randall Ltd.
Ampthill Road
Bedford MK42 9ER
Tel: 0845 1217 400
Fax: 0845 1217 515
Email: danfossrandall@danfoss.com
Website: www.danfoss-randall.co.uk
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Part No. 462v06 07/07
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