G
THERMASREG
®
FS-20
Rev. 2020 - V12
Electronic frost protection thermostat ⁄ frost monitor
THERMASREG
®
FS-20
with switching relay output, continuous temperature and valve output
(summation output 0–10V) and control and cascading output (0–10V), optionally with connection for heating element, in an impact-resistant plastic
housing with quick-locking screws, with display by default, with fully active sensorrod made from copper. The frost monitor is used to monitor air
conditioning systems, heat exchangers, heating registers and similar systems, and protects against frost damage and freezing. Falling below the
limit value is detected at the coldest measuring point of the capillary tube, the sensor rod is active along its entire length. Uses internal diagnostics
to detect capillary breakage, power failure or electric damage to the sensor as an error and the relay automatically switches to frost. The innovative
2-phase frost protection thermostat enables simple combination of several devices (cascading) for demand-oriented, comprehensive frost monitoring.
The delivery scope includes the mounting clamps
MK-05-K
for expert attachment of the sensor rod.
TECHNICAL DATA
Power supply:
24 V AC ⁄ DC (± 10 %)
Load resistance:
R
L
> 50 kOhm
Measuring range:
0...+15
°C
Input:
1 x 0 -10 V control input DDC
1 x 0 -10 V
ascading input
Output:
1 x 0 -10 V output temperature (corresponding to 0...+15 °C)
1 x 0 -10 V output valve (frost signal with control voltage and cascading)
1 x potential-free changeover contact (24 V), range of adjustment 0...+15 °C
Current consumption:
max. 100 mA at 24 V DC (
FS-20
without heating element)
max. 200 mA at 24 V DC (
FS-20 xx HE
with heating element)
Accuracy:
typically ± 1 K (at +10 °C)
Hysteresis of the switch step:
2K
Turn-on / run-in time :
< 1 min
Response time:
t
90
< 5 s
Sensor and capillary tube:
Copper sensor rod, length of 3 m or 6 m,
active along the entire sensor length,
min. response length of 25 cm
Ambient temperatures:
Sensor and capillary tube:
–20...+60 °C (capillary tube at a distance of > 20 cm from the housing)
Housing:
–15...+50 °C
Storage ⁄ transport:
–30...+70 °C
Housing:
plastic, UV-resistant, material polyamide, 30 % glass-globe reinforced,
with quick-locking screws (slotted ⁄ Phillips head combination),
colour traffic white (similar to RAL 9016), housing cover for display is transparent!
Housing dimensions:
126 x 90 x 50 mm (Tyr 2)
Cable gland:
M 16 x 1.5 ; including strain relief, exchangeable, max. inner diameter 10.4 mm
Process connection:
by mounting clamps
MK- 05 - K
(included in the scope of delivery)
Electrical connection:
0.14 - 1.5 mm², via screw terminals
Routing:
bending radius > 35mm
admissible vibration load ≤ ½g
admissible tensile load < 100 N
Permitted humidity:
< 95 % r. H., non-precipitating air
Protection class:
III (according to EN 60 730)
Protection type:
IP 65
(according to EN 60 529)
Standards:
CE-conformity, electromagnetic compatibility according to EN 61 326, EMC directive 2014 ⁄ 30 ⁄ EU
Equipment:
display with illumination,
three-line, cutout approx. 70 x 40 mm (W x H), for displaying the actual temperature,
measuring range overrange/underrange of the set switch point (frost protection temperature),
and alarm indicator for "frost" or "error" (capillary breakage, overvoltage/undervoltage)
Internal diagnostics:
Error 1
in case of cable / capillary breakage
Error 2
in case of undervoltage / overvoltage
(relay automatically switches to frost)
THERMASREG
®
FS-20
Two-phase frost protection thermostats
Type ⁄ WG02
Measuring
Range
Output
Sensor Display
length
Item No.
FS-20
FS20-UW LCD 3M
0...+15 °C
2 x 0 -10 V, 1 x changeover contact
3,0 m
■
9102-1012-2102-030D1
FS20-UW LCD 6M
0...+15 °C
2 x 0 -10 V, 1 x changeover contact
6,0 m
■
9102-1011-2102-030D1
FS-20 xx HE
with heating element
FS20-UW-HE LCD 3M
0...+15 °C
2 x 0 -10 V, 1 x changeover contact
3,0 m
■
9102-1012-2112-030D1
FS20-UW-HE LCD 6M
0...+15 °C
2 x 0 -10 V, 1 x changeover contact
6,0 m
■
9102-1011-2112-030D1
ACCESSORIES
KRD-04
Capillary tube gland bracket
7100-0030-7000-000
MK-05-K
Mounting clamps (6 pieces) plastic (included in the scope of delivery)
7100-0034-1000-000
WS-03
Weather and sun protection hood, 200 x 180 x 150 mm, stainless steel
V2A
(1.4301)
7100-0040-6000-000
