Eliwell

EW Plus 971

EW Plus Series • Refrigeration Controller

Type Refrigeration

Application Cold Room

Probe Inputs 2

Relay Outputs 2

Communication RS485 (optional)

Panel Size 28.5x71 mm

R1 Compressor

R2 Defrost

Two-relay controller with electrical or hot gas defrost

Technical Specifications

Relay Outputs	2
Relay Rating	8A/250VAC

Operating Temp	-5 to 55°C
Storage Temp	-25 to 70°C

Terminal	Function	Type	Wire Color
1	Power L	Input	brown
2	Power N	Input	blue
3	Probe 1 (+)	Input	red
4	Probe 1 (-)	Input	white
5	Probe 2 (+)	Input	red
6	Probe 2 (-)	Input	white
7	Relay 1 NO (Comp)	Output	black
8	Relay 1 COM	Output	black
9	Relay 2 NO (Def)	Output	orange
10	Relay 2 COM	Output	orange

Important: Always disconnect power before wiring. Verify terminal numbers with the actual controller label before connecting.

Code	Parameter	Range	Default	Description
SET	Setpoint	-50 to 110	0 °C	Temperature setpoint
Hy	Differential	0.1 to 25.5	2 °C	Switching differential
Ot	Room Offset	-12 to 12	0 °C	Room probe calibration
OE	Evap Offset	-12 to 12	0 °C	Evaporator probe calibration
dFt	Defrost Type	0=Off, 1=Elec, 2=Gas	1	Defrost method
dt	Defrost Duration	0 to 255	30 min	Maximum defrost time
dit	Defrost Interval	0 to 24	8 hr	Time between defrosts
dSt	Defrost End Temp	0 to 50	8 °C	Termination temperature