Data Sheet
RAE 2000 Thermostatic Operator
Application:
Technical
Specications:
RAE 8254
The RAE 2000 series of thermostatic operators
are designed for use in residential hot water and
low pressure steam heating systems. This nonelectric self-actuating proportional controller
provides eective regulation of temperature
within the space.
RAE 2000 operators are equipped with a tool free
snap on lock mechanism that allows mounting
of the operator to the RA2000 series of valve
bodies.
Thermostatic operator charge Liquid
Max. dierential pressure, close o 15 psi (1 bar), across valve body
Suitable valve mounting RA2000, RA-C, RA 15/6
Max. sensor temperature 140°F (60°C)
Adjustable temp. range 46° to 82°F (8° to 28°C)
Incorporated into the RAE operator are features
that include a ‘Freeze Protection Setting’. For the
RAE 8256 which utilizes a remote sensor, a 6ft
(2m) ultra-thin capillary tube is coiled within the
remote sensor housing. After the operator has
been mounted the capillary tube is pulled out to
the required length.
RAE 8256
Data and Ordering:
Type Version Setting Range Code no.
RAE 8254 Built-in sensor
Remote sensor
RAE 8256
VDLTG122 © Danfoss 07/17
capillary length 6 ft
(2 m)
46˚ to 82˚ F
(8˚ to 28˚ C)
013G 8254
013G 8256
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Data Sheet RAE Thermostatic Operator
Data and Ordering
Cont.:
RA2000 Valves
Valve Pipe Size Valve Ty p e Connection Code No.
½”
¾” 013G 8 020
1” 013G 8 025
1-¼” 013G 8 032
½”
¾” 013G8019
1” 013G 8 024
1-¼” 013G8031
½”
¾” 013G8018
1” 013G 8 023
1-¼” 013G 8030
Straight
Angle
Side Mount
Angle
013G8015
013G 8 014
FNPT x MNPT
Union Tailpiece
013G 8 013
Design:
½”
¾” 013G 8 0 4 4
The RAE thermostatic operator operates with a
liquid lled bellows system, which is actuated by
ambient temperature changes.
The calibrated pressure in the bellows corresponds
to the temperature. This pressure is balanced by
the force of a regulating spring.
On a rise in ambient temperature, the pressure
increases in the bellows, moving the valve cone
Straight
Double Female
Solder Unions
towards the ‘closed’ position, until equilibrium
exists between the bellows and spring.
On a drop in ambient temperature, the pressure
falls, allowing the bellows to contract and the
valve cone to move towards the ‘open’ position
until a state of equilibrium is re-established.
013G 8 0 42
1. Socket
2. Bellows
3. Setting handle
4. Setting mark
5. Limiter tab
6. Reset spring
7. Sensor medium
8. Spindle
9. Spring
10. Capillar tube
11. Console
12. Cover
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VDLTG122 © Danfoss 07/17
Data Sheet RAE Thermostatic Operator
Setting the Temperature:
INDEX
Locking the Settings:
46˚
53˚ 61˚
I
*
8˚ 12˚ 16˚ 20˚
The required room temperature is set by turning
the setting dial. The temperature scales show
the correlation between scale values and the
room temperature. The temperature values
stated are for guidance only as the obtained
room temperature will often be inuenced by
installation conditions.
Locking and limitation of the temperature set
point of RAE operators are carried out using the
limiter tabs as shown in the illustration:
68˚
III IIII >I
II
75˚ 82˚ ˚F
24˚
28˚
˚C
• Turn operator to maximum setting.
• Press and hold tab with screw driver while
turning handle to desired max setting.
• Remove screwdriver.
• Similar steps are repeated when setting the
minimum.
• Turn operator to to lowest setting.
• With screwdriver press and hold tab to
setting. Then remove.
Mounting:
The Danfoss snap-on mounting is easy to install
and requires no use of tools, once the protective
cap on the valve has been removed.
The operator is tted to the valve by applying a
gentle pressure. When the operator is in place,
the snap-on mechanism is activated and the
operator has been correctly mounted.
Installation Removal Resetting
VDLTG122 © Danfoss 07/17
To remount the operator to the valve after
removal, reset the snap-on mechanism by
rotating the grey tightening ring base counterclockwise.
If mounting and dismounting are carried out
again, the mechanism must be reset
manually by turning the grey tightening ring
base.
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Data Sheet RAE Thermostatic Operator
Dimensions:
3.6 in (91.5 mm) to
3.75 in (95.5 mm)
2.25 in
(57 mm)
Operator type RAE 8254
2.25 in
1.4 in
(35 mm)
1.4 in
(35 mm)
(57 mm)
3.6 in (91.5 mm) to
3.75 in (95.5 mm)
2.8 in
(71 mm)
Operator type RAE 8256
Danfoss can accept no responsibilit y for possible errors in printed materials and reserves the right to alter its products without notice.
All trademarks in this material are property of the respective companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
Danfoss
Baltimore, MD | Toronto, ON
Tel.: 1-888-DANFOSS (326-3677)
heating.cs.na@danfoss.com
www.heating.danfoss.us
VDLTG122 © Danfoss 07/17
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