EWELLY EW-988R Operation Instruction

EW 988R -
EW-988R microcomputer electronic thermostat adopts rail mounting design, with
cooling, heating and temperature control hysteresis modes, and also has functions
such as adjustable compressor delay protection time, temperature correction,
temperature upper and lower limits, and automatic fault alarm. It is high-precision,
with strong versatility, stable performance, suitable for various refrigeration and
heating projects.
Sepcification
1.Operating Voltage：220VAC±10％; 50HZ/60HZ
2.Output Relay: 2-off 10A/220VAC
3.Power Consumption：≤3W
4.Working Environment：-10 ～50 ℃ ℃
5.Control Range：-19.9℃～99.9℃
6.Resolution：0.1℃；Accuracy：±0.5℃
7.Input Signal：2-Off 20K NTC sensors，standard cable length: 2m
8.Overall Dimension：72（W）× 54（H）× 88（D）mm;
9.Installation method: Rail mounting
Display panel
Heating indicator
Cooling indicator
Running indicator

Installation Requirement

1.Please make sure that the power supply voltage meets the required voltage of the
instrument. The deviation should be less than ±10％.
2.The sensor should be kept away from the power cable.
3.Strictly distinguish the interfaces of the sensor, power cable and the relay output.
；RH≤90％
Current temperature
Up and down key
Operation Instruction

1. Temperature setting

a) Under normal operating conditions, press the "SET" key to display the control
temperature.
b) Press the "▲" or "▼" key to adjust the value.
c) Hold the "▲" or "▼" key to quickly adjust the parameter value.
Single
To display set temp.
Press
Single
press

2. User parameter adjustment method

a) Hold "SET"for more than 6s until the parameter code "HC" is displayed, indicating
that you have entered the system setting menu.
Hold for 6s
b) Press the "SET" key to select different parameter values. (The order of parameters is:
HC-LS-HS-Pt-CA-d).
Single
press
c) Press "SET" and press "▲" or "▼" at the same time to adjust the value of a specific
parameter.
+
Two hand
operation
+
d) Under setting state, if there is no key operation within 6s, it will automatically return
to the normal operation state.

Wiring diagram

Version：
Hold
Quickly adjust the value
Heating
Cooling