Danfoss 060L110166 KP 61 Thermostat -30 to 15 C 5 m

KP 61 thermostat for evaporator and cold-room control from -30 to 15 C

Danfoss 060L110166 is a KP 61 thermostat with a 5 m capillary tube. The sensor is a 2.5 x 500 mm coiled capillary that is simply placed in the air stream or fixed to the evaporator, and the vapour charge keeps the reaction fast. Setting range covers -30 to 15 C, which includes deep-freeze defrost termination, cold room and chilled-air control, so the code is one of the most universal thermostats in refrigeration plant.

The data sheet describes the KP thermostats as single-pole double-throw temperature-operated switches that can be connected directly to a single-phase AC motor of up to roughly 2 kW or used in the control circuit of DC motors and large AC motors. They are used for regulation but also appear in safety monitoring systems.

Technical specifications

Setting the differential and placing the sensor

The differential changes with the setting on the scale: it is largest (5.5 to 23 K) at the bottom of the range and smallest (1.5 to 7 K) at the top. For a cold room kept at 2 C, set the scale near the upper range and use the differential spindle to avoid frequent compressor starts. When the thermostat is used to end defrost, place the sensor at the point on the coil that clears last.

The long 5 m capillary allows the control head to stay in a machine room while the sensor reaches into a cabinet. Excess capillary should be coiled loosely and not be laid across warm components; kinks and sharp bends damage the vapour charge system.

Electrical connection and ordering notes

Electrical connection is from the front, which makes rack mounting simple; the rubber cable gland accepts 6 to 14 mm cable. The standard version has a change-over contact, and the data sheet notes that opposite contact function or a signal contact can be obtained in other versions with other code numbers.

Confirm the sensor length, the range and reset function (this code is automatic) before ordering, as KP 61 is sold with 2 m and 5 m capillaries, manual-reset and gold-contact versions. Seven Star LLC is an independent supplier in Muscat and can quote 060L110166.

For repeat purchases of 060L110166, tell us the quantity you expect to use each year and the delivery point in Oman. That helps us to plan the enquiry with the manufacturer channel and to give you a realistic lead time, which we confirm only when we quote.

Selection considerations for a KP 61 thermostat

A thermostat for refrigeration has to fit three things: the temperature band of the process, the way the sensor meets that temperature, and the electrical load it switches. Check that the required cut-in and cut-out points both sit inside the setting range and that the needed differential is achievable at that point of the scale, remembering that the differential narrows towards the top of the range. Decide where the sensor will sit, in the air stream or on the evaporator, and whether the capillary length reaches comfortably without tight bends. Finally, compare the compressor, fan or contactor load with the stated contact ratings; for larger motors, let the thermostat switch the control circuit of a contactor rather than the motor current.

Installation and commissioning practice

Mount the control head on a vibration-free surface in a place where the scale can be read and adjusted, and where the head is not colder than the sensor, so that the charge behaves as intended. Fix the capillary with clips along its route, protect it where it passes through walls or panel openings, and keep it away from sharp edges and moving parts. Wire the change-over contact according to the required function, use the rubber cable gland with a cable of the correct diameter, and close the cover before power is applied.

At commissioning, set the range and differential, then run the plant through several cycles while comparing the switching points with a calibrated thermometer placed next to the sensor. Fine-tune the setting so that the room or product temperature stays where it is needed without short-cycling the compressor. Record the final settings on the drawing or a label inside the panel.

Operation and maintenance

In normal service the thermostat needs little attention. During planned maintenance, check that the sensor is still correctly fixed, that the capillary has not been crushed or rubbed through, and that terminals are tight. Compare the switching points with a reference thermometer from time to time, especially after work on the evaporator or air flow, since a moved sensor is a frequent cause of changed behaviour.

Refrigeration control in GCC conditions

Cold stores, food processing rooms and air-conditioning plant in Oman and the GCC run long hours under high outside temperature, and machine rooms can become hot and dusty. Because the enclosure is IP30, install the head inside a cleaner panel or a protected area rather than in open outdoor positions, and keep it within the stated ambient range. Avoid placing the sensor where door openings bring warm, humid air directly onto it unless that is the intended measuring point. When you request a quotation, give the code number, quantity, required range and capillary length, reset type and the load to be switched.

Documents and quotation

The attached file is the Danfoss KP standard thermostat data sheet AI556836559142, with the full code table. Related controls are listed under temperature instrumentation.