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Antifreeze controller
Type Item no. ADG Euro / pc.

2-phase antifreeze control, downstream - with display
for monitoring temperature of air heaters against freezing. Copper
capillary tube with precision switching mechanism and analog
output 0 –10 V for proportional opening of control valves. The
freeze protection monitor always responds to the coldest location
of the capillary tube (min. immersion depth: 250 mm). Setpoint
potentiometer, operating mode switch for ”Auto“, ”Test“, ”Manual“,
reset button, large display for operating mode and red LED for
freeze warning.
Supply voltage: 24 V AC +10 / -20 %; 50 / 60 Hz
Power consumption: 6.6 VA
Sensor / adjustable range: 0 – 15 °C / 1 – 10 °C
Default setting: 5 °C
Switching differential: approx. 2 k
Relay output (changeover contact)
max. 6 A, 230 V AC; 6 A, 24 V DC
min. 5 mA, 5 V AC / DC
Input / output signal: 0 – 10 V max 1 mA each
Rated device head temp.: -15 – 55 °C
Protection type / class: IP 42; I
Time constant: calm air 90 sec
moving air < 40 sec
Capillary tube: Rated temperature max. 110 °C
2
Electrical connections: Spring clips max. 2 x 1.5 mm
or 1 x 2.5 mm 2
Permiss.
ambient conditions: -15 – 55 °C, 0 – 85 % RH
(non-condensing)
Scope of delivery: M16 cable gland, rubber
grommet for feeding the capillary
tubes through the duct and
screw fasteners.

Capillary tube length 2 m, with 4 mounting clamps OPP-FRO-S2 101297 02 275.70
Capillary tube length 6 m, with 6 mounting clamps OPP-FRO-S6 101298 02 320.90
Data sheet no. 20672

Mounting clamps (replacement part 1 pc.) MK 101196 02 1.20
for antifreeze and average value sensors
Data sheet no. 20672

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