Danfoss EETc 11, EETc 12, EETc 21, EETc 22, EETa 2W Data sheet

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Data sheet

Refrigeration controller

EETc 11, 12, 21, 22 and EETa 2W, 3W

The EET Series is the next generation of Electronic Thermostats which is a direct replacement of

the Mechanical Thermostat (and timer) and Danfoss ETC series. It comes in two variants: EETc (Enhanced Electronic Thermostat, compact) which has one and two output model options for controlling compressor and fan/defrost heater and EETa (Enhanced Electronic Thermostat, advanced) which has two and three output model options for controlling compressor, fan, defrost heater or light.

With the EETc and the EETa, we continue building on the electronification legacy by bringing a high number of new features and capabilities

to increase performance and flexibility, while keeping the familiar form factor and installation method.

Features	• Moisture protected design for installability
	inside the cold space area
	• Similar dimensions and installation method
	as ETC series and Mech Thermostat for easy
	transition (applicable for EETc)
	• Wide Voltage Power Support (110 – 230 V)
	(applicable for EETa)
	• Configurable auxiliary inputs and outputs to
	control fan, defrost heater and light
	• Alarms, fan & light control, compressor
	management using door sensor
	• Supports multiple sensor types: NTC 5K, NTC
	10K, PTC 990
	• Zero cross technology for longer relay life
	• Mass programmable at production site with
	direct programming key access

•Compressor protection from voltage fluctuations, spikes and surges

•Advanced fan control

•Multiple defrost methods to choose from

•Condenser overheat protection

•Economy mode (Eco mode) to give more energy saving potential during night and long hours of no use. EETa also supports Holiday mode, which allows longer than a day period of auto temperature offset

•Dual defrost control (only EETa)

•Quick factory test mode to check if inputs/ outputs are functioning

•High and low temperature alarm indication

•Safety/Emergency mode in case of sensor and potentiometer failure

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Data sheet | Refrigeration controller, EETc 11, 12, 21, 22 and EETa 2W, 3W

Applications	Applications supported by the EETc:		Applications supported by the EETa:
	•	Glass door merchandisers	•	Glass door merchandisers
	•	Beverage coolers	• Commercial freezers and refrigerators
	• Commercial freezers and refrigerators		•	Preparation tables
	•	Preparation tables	•	Dual compressor refrigerators
			• Anti-freeze applications requiring auto heat
				control
			• Applications requiring dual defrost control

Variants	EETc:		EETa:
	• EETc 11: 1 output, 120 V		• EETa 2W: 2 outputs, wide voltage (120 – 230 V)
	• EETc 12: 1 output, 230 V		• EETa 3W: 3 outputs, wide voltage (120 – 230 V)
	• EETc 21: 2 outputs, 120 V
	• EETc 22: 2 outputs, 230 V

Facts	Variant differences
	HW differences between EETc and EETa:

		Features	EETc		EETa

		Sensor inputs	2		3

		Wide voltage power module	No		Yes

		Visible LED indication	Power		Power, Error

		Temperature sensors supported	NTC 5K, NTC 10K		NTC 5K, NTC 10K, PTC

		Output options	1 & 2 Relay		2 & 3 Relay

	SW differences between EETc and EETa:

		Features	EETc		EETa

		Onsite Parameter Programming/	Koolkey with external power		Koolkey with powered controller
		Production Programming capability

		Onsite firmware update capability	No		Yes

		Eco mode	Yes		Yes

		Holiday mode	No		Yes

		Light Control	No		Yes

		Dual defrost	No		Yes

		Dual compressor control	No		Yes

		Anti-freeze function	No		Yes

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