Danfoss 017-152066 RT 17 Room Thermostat -50 to -15 C

Danfoss 017-152066 RT 17 room thermostat for -50 to -15 °C

The Danfoss 017-152066 is an RT 17, a thermostat with a built-in room (air) sensor for deep-freeze temperatures between -50 and -15 °C. The sensor is a finned element that projects below the housing, so no capillary or pocket is required: the whole unit mounts in the cold air space or on a wall near it. The differential is adjustable between 2.2 and 7 °C at the lowest range setting and between 1.5 and 5 °C at the highest setting, and the sensor tolerates 100 °C. Seven Star LLC supplies the 017-152066 in Oman and the GCC as an independent supplier in Muscat.

The Danfoss product page lists 017-511766 as the identical product, and that code appears in the data sheet ordering table.

What 017-152066 and RT 17 mean

017-152066 technical specifications

Room sensor behaviour and placement

A room-sensor thermostat measures the temperature of the air around the housing sensor, so its position governs accuracy. Mount it away from evaporator discharge air, door openings and direct radiation, and where air circulates freely around the finned element. In deep freezers the warm element is the housing, which must still stay above the minimum ambient temperature of -50 °C; the data sheet states -50 to 70 °C for the thermostat housing. The vapour charge works only when the sensor is the coldest component, and here the sensor sits in the cold air while the housing and its bellows are at similar or higher temperature, which is consistent with the manufacturer rule for type A units.

The differential determines the temperature swing of the stored goods. A narrow setting such as 2 °C near the top of the range gives tight control but risks short cycling in a small cold room; a wider setting reduces compressor starts. Set the differential on the disc and verify with a reference thermometer, since the mechanical differential is smaller than the thermal one the system experiences.

Place of the 017-152066 in the RT thermostat family

For capillary-sensor duty in similar ranges the RT 9 covers -45 to -15 °C and the RT 13 covers -30 to 0 °C, both with 2 m of capillary. The RT 3 (017-501466) covers -25 to 15 °C with a remote bulb. Only the RT 17 offers the integral room sensor for the -50 °C region. If the air space is large and the sensor must reach into a duct or through an insulated wall, a capillary type is the easier fit.

Selection and ordering checklist for RT 17

• Minimum and maximum air temperature required, within -50 to -15 °C.
• Differential needed to avoid short cycling at the chosen setting.
• Position where the housing can be mounted and sensor exposed to representative air.
• Switching function and load: SPDT contact 10 A 400 V AC-1, 3 A 400 V AC-15.
• Required approvals; this code lists CE, EAC, CCC and UA but no marine class marks.
• Quantity and spare units for service.

Cold-range thermostats compared with the 017-152066

The table shows why the RT 17 is chosen mostly for room-air control: it is the only member that reaches -50 °C and the only one with a built-in air sensor, at the cost of a lower sensor temperature limit of 100 °C. During defrost cycles the air near an evaporator can exceed the set range, which the sensor tolerates without damage.

Installation and commissioning

Use the two fixing holes behind the cover and keep the cable entry downward on vibrating or wet sites. Seal both Pg 13.5 glands, since moisture condenses quickly on equipment that is below freezing, and keep drip loops on the wiring. After connecting the SPDT contact, cycle the unit with a test sensor temperature, if available, or confirm the cut-out against a calibrated thermometer.

Applications of the 017-152066 in Oman and the GCC

Deep-freeze rooms for food distribution, blast freezers, pharmaceutical cold chains and medical storage are the typical uses. Oman’s high ambient temperature raises the load on freezer plants, so a robust, adjustable thermostat that can tolerate the housing at up to 70 °C is helpful in plant rooms and unconditioned loading bays.

Information to send with an RFQ for 017-152066

• Code 017-152066 and quantity.
• Target temperature, differential and the space size.
• Mounting location and cable entry arrangement.
• Electrical load.
• Required approvals.

Documents and quotation

The Danfoss RT thermostat data sheet is attached on this page.

Send the code 017-152066 and your temperature requirement and we will confirm availability and a quotation for Oman and the GCC.