Technical Data - S+S Regeltechnik FST-3 Operating Instructions, Mounting & Installation

G
®
THERMASREG
The mechanical frost protection thermostat ⁄ frost monitor THERMASREG
reset, or with mechanical locking and manual reset, is available with capillaries in lengths of 0.6 m, 1.8 m, 3 m, 6 m, or 12 m.
This frost protection monitor is used for air- and water-side temperature monitoring at heat exchangers, water circulation systems, and heating
registers to prevent freezing up and to avoid frost damages, e. g. in ventilation and air conditioning ducts. All devices are self-secure with sensor
breakage detection. In case of damage to the capillary tube – membrane system, the relay automatically switches to heating function.
®
THERMASREG FST - 3 can also be used for monitoring liquids. The sensor tube can be installed inside an immersion sleeve. Mounting clamps
MK - 05 -K are included in the delivery.

TECHNICAL DATA:

Switching capacity: ........................ 10 (2) A, AC 250 V ;
Setting range: ................................. - 10 °C ...+ 15 °C ⁄ 14 °F... 59 °F,
Operating difference: .................... 2 ± 1 K (3.6 ± 1.8 °F)
Reproducibility: ............................... ± 0.5 K (± 0.9 °F)
Contact: ........................................... dustproof micro switch as single-pole potential-free changeover contact
Sensor responding length: ........... ca. 40 cm
Length of capillary tube: ............... see table of types (0.6 ...12 m)
Resetting: ........................................ FST-xD automatic
Permissible medium: ..................... air (FST-1 ⁄ 5 ⁄ 7 ⁄ 8 ); water (FST-3)
Ambient temperatures: ................ maximum operating temperature: + 70 °C (158 °F)
Process connection: ...................... by mounting clamps MK- 05 - K
Connecting head: ........................... plastic, material polyamide, 30 % glass-globe-reinforced,
Dimensions: ..................................... 108 x 72.5 x70 mm
Other materials: ............................. mechanical sheet metal parts: galvanised steel
Installation length:: ........................ arbitrary
Electrical connection: .................... 0.14 - 2.5 mm²
Cable gland: ..................................... M 20 x 1.5, including strain relief
Protection class: ............................ I (according to EN 60 730-1)
Protection type: ............................. IP 65 (according to EN 60 529)
Standards: ....................................... CE conformity, EMC directive 2004 ⁄ 108 ⁄ EC,
Type ⁄ WG2 Temperature
Range
FST - 1D -10 °C ...+15 °C
FST - 3D -10 °C ...+15 °C
FST - 5D -10 °C ...+15 °C
FST - 7D
-10 °C ...+15 °C
FST - 8D
-10 °C ...+15 °C
FST - 1D - HR
-10 °C ...+15 °C
FST - 3D - HR -10 °C ...+15 °C
FST - 5D - HR -10 °C ...+15 °C
FST - 7D - HR -10 °C ...+15 °C
FST - 8D - HR -10 °C ...+15 °C
Accessories: KRD - 04
MK - 05 - K
TH - ms - 01
TH - VA - 02
FST- x D
Note:
FST- x D - HR
FST
because of gold-plated switching contacts also switching of signal voltages < 24 V
factory setting to w = 5 °C (41 °F)
FST-xD - HR manual
minimum operating temperature: w + min. 2 °C (min. 3.6 °F)
storage ⁄ transport: - 30 ...+ 70 °C (- 22 ...+ 158 °F)
(included in the scope of delivery)
colour pure white (similar RAL 9010)
capillary tube: copper
capillary tube filling: R 507
switching contacts: Ag ⁄ Ni (90% ⁄ 10%) gold-plated (3μm)
low-voltage directive 2006 ⁄ 95 ⁄ EC
Steps
one-step
one-step
one-step
one-step
one-step
one-step
one-step
one-step
one-step
one-step
Capillary tube penetration bracket for air ducts
Mounting clamps (6 pieces) plastic (included in the scope of delivery)
Brass immersion sleeve 120 mm
Stainless steel immersion sleeve 120 mm
TW = temperature monitor (i.e.: automatically switching)
TB = temperature limiter (manual rest)
® FST with switching output, fully-active sensor rod, with automatic
Features
Control Mode
TW, automatic
TW, automatic
TW, automatic
TW, automatic
TW, automatic
TB, manual rest
TB, manual rest
TB, manual rest
TB, manual rest
TB, manual rest
Length of Permissible
Capillary Medium
6.0 m air
1.8 m air ⁄ water
3.0 m air
12.0 m air
0.6 m air
6.0 m air
1.8 m air ⁄ water
3.0 m air
12.0 m air
0.6 m air