© Danfoss | DCS (rm) | 2020.02
Operation Principle
When the temperature exceeds the set value (RANGE scale), contacts
1–4 make and contacts 1–2 break (point I, Fig. 3). The contacts return to
their initial position when the temperature drops below the value which
is equal to the set point value (RANGE scale) minus the differential value
(DIFF scale) (point II, Fig. 3)*.
A
- set point
B
- differential
C
- set point minus differential
1
2
4
1
2
4
1
2
4
A
B
C
Contact Changeover Scheme
Frost Protection
Connect terminals 1 and 4. The switch has the following factory settings: set point (RANGE) 7°C; differential (DIFF) 2°C. When the temperature
drops below 5°C, contacts 1–4 break and contacts 1–2 make (signal contacts). The contacts return to the initial position automatically when
the temperature rises above 7°C.
Overheating Protection
Connect terminals 1 and 2. When the temperature exceeds the set value, contacts 1–2 break and contacts 1–4 make (signal contacts). The
contacts return to the initial position automatically when the temperature drops below the set value minus differential*.
* Please note that the division value of the DIFF scale for differential adjustment does not fully correspond to 1°C over the entire range and
varies depending on the selected control range. If you need to adjust the temperature switch to switching points other than the factory
settings, use the nomogram below and the example of settings in Fig. 4.
Setting
1. Using Scale B, determine the desired value for the lower switching
point of 3°C and draw a straight line up.
2. Using Scale A, determine the upper switching point. In this example,
it is 8°C. Set this value on the RANGE scale (set point). Draw a horizontal
line on the nomogram to determine the differential value.
3. The intersection point of the differential curves determines its value
on the scale of the device. In this case, the lines intersect on the curve
corresponding to the mark “6” on the differential scale. Set this value on
the DIFF scale.
Example
The device needs to be activated when the temperature drops below 3°C. When the temperature rises to 8°C, the contacts must return to
their initial position.
Important
Temperature switches are not measuring instruments. If you require high-precision
temperature control, configure the switch using a certified measuring instrument -
a thermometer or a temperature sensor.
°C °C
2 4 6 8 10
°C
DIFF
RANGE
Switch Setting Nomogram
Using a screwdriver, loosen Screw 1 and remove Locking plate 2 and Adjustment
knob 3 (Fig. 5). Adjust the set point (RANGE) and the differential (DIFF) on the
corresponding scales. Reinstall and secure the Locking plate and Adjustment knob 3
with Screw 1. (If Locking plate 2 is not removed, a slight change in the setting in the
range of 3–4°C is allowed).
Danf
os
s
60-602.10
A
B
1
3
2
Mounting and Setup Instructions
General safety requirements must be observed when mounting the device.
Mounting may only be performed by qualified personnel in compliance with the
applicable standards. Do not touch moving parts with your fingers or any tools.
Mount and adjust the temperature switch in the absence of electrical voltage
only. The temperature of the switch housing must be at least 2°C higher than the
sensor temperature.
Increasing
Decreasing
Decreasing
Increasing
Set Point Setting Scale
Differential Setting Scale
A
-
set point scale
B
-
differential scale
Fig. 3
Fig. 4
Fig. 5
AN33432347566101-000101 | 2
