Brand: JUMO

JUMO frostTHERM-ATE Electronic Frost Protection Thermostat

Name: JUMO frostTHERM-ATE Frost Protection Thermostat | Seven Star LLC
Brand: JUMO
SKU: frostTHERM-ATE

Description

Electronic frost thermostat for ventilation and air conditioning systems

The JUMO frostTHERM-ATE (type 604170) is an electronic frost protection thermostat for the air-side temperature monitoring of ventilation and air conditioning systems. It prevents freeze damage by switching off ventilators, opening heating valves, closing air flaps or triggering other measures against freezing.

The switching point can be set freely between 1 and 10 °C, and the device works either as a monitor with automatic reset or as a limiter with manual reset. The setting is made on a two-digit 7-segment display with two keys, without opening the case lid.

A self-monitoring function checks the probe line. If a capillary tube breaks, the thermostat switches to the frost function and the monitored plant stays protected.

Regulated membrane heating keeps the unit working down to -15 °C ambient, and the thermostat can be used where the air-handling unit is mounted in an unheated space. It is suitable for industrial use as well as for households and small businesses.

Technical specifications

Parameter	Specification
Type	604170/02-5-008, frost monitor with relay contact, surface-mounted
Measuring range	0 to 15 °C; setting range 1 to 10 °C; adjustment point 5 °C
Accuracy	+/-1 K at the adjustment point; switching differential about 2 K
Operating mode	Automatic (At) or manual reset (Hd)
Probe line	Copper capillary, 2000 mm or 6000 mm, 2.0 mm diameter; minimum response length 250 mm
Time constant	About 90 s in still air; below 40 s in moving air
Relay output	Changeover contact: AC 230 V, 6(2) A; DC 24 V, 6 A; minimum AC/DC 12 V, 100 mA
Analog outputs	Two outputs 0 to 10 V: probe temperature 0 to 15 °C and valve control signal
Signal input	DC 0 to 10 V for controller valve control
Supply	AC 24 V +10 %/-20 % SELV; 48 to 63 Hz; max. 6.6 VA
Heating	Regulated membrane heating for operation down to -15 °C
Ambient temperature	-15 to +55 °C operation; storage -25 to +65 °C
Connection	Spring-cage terminals; M16 cable fitting for cable 5 to 10 mm
Weight	About 0.34 kg (2 m probe line) or 0.41 kg (6 m)

Order code and accessories

The order code is 604170 / 02 / design 5 / range 008 / probe line / probe material 40 / extra code. Stock versions in the data sheet are 604170/02-5-008-2000-40/000 (part 60003410) and 604170/02-5-008-6000-40/000 (part 60003411). Extra code 102 gives a neutral device version, where the customer must comply with local labeling rules.

The delivery includes the device, the operating manual, two M16 x 1.5 cable fittings, two screws for direct mounting and a rubber plug for routing the probe line. Accessories are a mounting flange (00604453), holders in packs of three or six and a spare cable fitting.

The F-gas filling is R134a, with 0.13 g for the 2 m version and 0.35 g for the 6 m version, which the data sheet lists with a GWP of 1430.

Two analog outputs of 0 to 10 V are provided: one represents the probe temperature from 0 to 15 °C, and the other follows the valve control signal. A valve control signal input of 0 to 10 V lets the thermostat take over the heating valve when frost conditions occur, and the lines may be up to 300 m long with a 1.5 mm2 conductor.

The relay is a floating changeover contact with a minimum switching capacity of AC/DC 12 V and 100 mA and a maximum of AC 230 V, 6(2) A. A status LED shows the switching position, and the red two-digit display shows settings and the reset in manual mode.

The unit can be wall mounted directly with two screws, or fitted with the mounting flange accessory. A cable fitting M16 x 1.5 is included in a pack of two, and a rubber plug keeps the probe line routed neatly out of the housing.

Installation in air handling units

Lay the probe line across the air stream behind the heating coil or in the fresh air section, with the minimum response length of 250 mm exposed to the coldest air. Longer lines cover a larger cross-section and detect cold spots that a single point would miss.

The analog outputs let a building management system display the probe temperature, and the valve control input and output let the thermostat override a controller signal so that a heating valve opens when frost threatens. A reset button can be connected for manual reset operation.

Electrical connection uses spring-cage terminals for up to 2 x 1.5 mm2 or 1 x 2.5 mm2, and the case has an M16 cable fitting for 5 to 10 mm cable. The vibration class is 3M2 and the device meets the EMC requirements of DIN EN 61326-1, class B.

The typical hysteresis of about 2 K means the relay resets when the air has warmed by about 2 K above the switching point in automatic mode. In manual mode the reset key must be pressed after the temperature has recovered, which is the preferred behavior for many fan and damper circuits.

Documents and quotation

This page carries the manufacturer PDF (JUMO frostTHERM-ATE data sheet 604170 (EN, 8 pages)) for checking dimensions and order codes. Use the quotation form to name the exact variant, options and delivery address, and we will answer with supply information. See also Temperature Instrumentation for similar instruments.

Datasheets & Documents

Datasheet JUMO frostTHERM-ATE data sheet 604170 (EN, 8 pages) Download

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About brand

JUMO is the German maker of temperature sensors, process controllers, pressure transmitters and liquid analysis instruments. Moritz Kurt Juchheim founded it in Fulda in 1948 as M. K. Juchheim KG, making glass thermometers with six employees. The name JUMO comes from the founder's name. It is still a family company headquartered in Fulda, and the parent company has been called JUMO GmbH & Co. KG since 2003.

Seven Star LLC is an independent supplier in Muscat. We list JUMO RTD and thermocouple probes, thermowells, transmitters, controllers, recorders and water analysis instruments, and supply them to process plants, OEMs, HVAC contractors and water utilities in Oman and the GCC by type number.

JUMO company profile

Established	1948, Fulda, Germany, by Moritz Kurt Juchheim
First products	Glass and contact thermometers; platinum glass sensors from 1966
Ownership	Family-owned; renamed JUMO GmbH & Co. KG in 2003
Product families	RTD and thermocouple probes, thermowells, temperature and pressure transmitters, controllers and thermostats, safety temperature limiters, paperless recorders, liquid analysis and flow and level instruments

Milestones

1948: Moritz Kurt Juchheim founds M. K. Juchheim KG in Fulda, making glass thermometers with six employees.
1966: Platinum glass temperature sensors are added.
2003: The parent company is renamed JUMO GmbH & Co. KG.

JUMO products we list

Family	Models	Typical use
RTD and thermocouple probes	902020, 902030, 902050, 902120, 902006 2xPt100, PROCESStemp, mineral-insulated RTD, 901020 thermocouple, 901210, 902810 hygienic, 902550 surface, 902520 HVAC, MarineTemp	Temperature measurement in pipes, vessels, machines, HVAC and food plants
Thermowells and inserts	909710 thermowells, 909740 measuring inserts	Protecting sensors and replacing them without opening the process
Temperature transmitters	dTRANS T01, T03, T04, T05, T06 SIL, T07 HART, T09, T1000 IO-Link, DELOS T switch	Converting sensor signals to 4-20 mA, HART or IO-Link
Pressure and level	dTRANS p20, p30, p31 hygienic, p33 Ex, p02 DELTA, MIDAS S05, MIDAS DP10, DELOS S02, MAERA S25, NESOS R20	Pressure in process, hydraulic and OEM systems; tank and well level
Controllers, limiters and recorders	DICON touch, IMAGO 500, dTRON 316, iTRON, cTRON, diraTRON 104, eTRON T, safetyM STB/STW, safetyM TB/TW, LOGOSCREEN 601, mTRON T	Furnace, oven and process control, over-temperature protection and recording
Liquid analysis and flow	AQUIS touch S, AQUIS touch P, AQUIS 500 pH, AQUIS 500 CR, dTRANS pH 02, pH electrode, digiLine DO, ecoLine NTU, flowTRANS MAG H20, flowTRANS US W01	pH, conductivity, oxygen and turbidity in water treatment; liquid flow

Choosing a temperature sensor starts with the range and accuracy. A Pt100 RTD is accurate and stable from about -200 to 600 °C and is the usual choice in process plants. A thermocouple (type K or J, for example) covers much higher temperatures and responds faster but is less accurate. The wiring also matters: a 3-wire or 4-wire Pt100 connection cancels the resistance of the cable, while a 2-wire connection adds an error that grows with cable length. That is why a head-mounted transmitter is often fitted close to the sensor.

Where JUMO products are used

In Oman and the GCC, JUMO sensors and controllers are used in oil and gas and chemical plants, food and beverage production, plastics and metal heat treatment, HVAC and district cooling, water and wastewater treatment, swimming pools and marine applications.

Ordering JUMO products: what we need

Send the JUMO type number and the full order code from the label (for example 902020/10-...). For probes, add the sensor type (Pt100, Pt1000, type K or J), the number of wires, the insertion length and diameter, and the process connection. For controllers, add the input, outputs and supply voltage.

Facts checked against JUMO's company history, October 2026.

Browse JUMO products by category: Temperature Instrumentation, Pressure Instrumentation, Liquid Analysis Sensors, Controllers & Data Acquisition, Level Transmitter.