PURGEAR STC-2304 Digital Thermostat User Guide

STC-2304 Thermostat
Quick Start Guide
(Version 21.08.02GEN)

STC-2304 owns 6 touch-sensitive keys, two sensors, and three output relays to connect and control the Refrigerator, defrosting unit, and evaporator fan.

Wiring Diagram

| Live
---|---
| Neutral/Null
| Earth
Co| Power Supply Input
| Compressor
| Defrosting
| Fan
7| Co-point of Sensor
8| Room Sensor
9| Defrosting Sensor

Lock/Unlock Keys

If you found the keys were locked, Hold the [ ] key for 1s to unlock, and the icon in the left bottom of the screen will dim, It will auto-lock again if without cooperation in the 30s.

Restore Factory Setting

Hold the [ ⋀] key for 10s, and the screen will show “ ”, now release the [⋀ ] key and hold the [ ] key for 3s; The screen will display “ ” once it succeeds; Show “ ” if failed, please power on again before trying.

Set the Aimed Temp Range

Unlike STC-2301/2302/2303, they own a heating mode. This thermostat only controls the refrigeration and defrosting, and fan, this unit is without code. https://www.thermo-hygro.com
The aimed temperature range was defined between the “On Temp.” and the “Off Temp.”. Set the temperature for load starts/stops

1. [On Temp] Key: touch this to check/edit the existing
   [Temperature for Load Turn On], the character “On Temp” lighting;
2. [Off Temp] Key.: touch this to check/edit the existing
   [Temperature for Load Turn Off], the character “Off Temp” lighting;

Function Menu

Hold the [ ] key for 3s to see the Menu List.

| Defrosting Cycle / Interval Time Count Mode
The sum working time of the controller
The sum working time of the compressor
| Water dripping Time
| Defrosting by, is Electric-Thermal, is Hot Gas
| Defrosting Stop Temperature
| Fan mode
| Time delay for fan 1st time running after pass F4
| Compressor Startup Protection / Delay time
| Alarm Delay time for this unit 1ST-time power on
| Over-Temperature Value to Trigger Alarm
| Alarm Delay time after time pass F10
| Temp. Calibration = Real Temp.-Measured Temp

Set the Fan

Five options are available in the fan mode

| Description
---|---
≤-| Fan startup earlier than the compressor
≥| Fan startup later than the compressor
| Fan keep synchronous with the compressor
| Fan continuous working without interrupt
| Fan continuous working except for the defrosting time and water dripping time.
&|  are the difference between this unit and

STC-2303.

Set the defrosting

First, you should set the defrosting interval time, since
A. when = , the defrosting function was disabled, then , , ,  are useless;
B. When > , The defrosting function works.

Next, configure the which is the defrost method,
A. = , Defrost by Electric-Thermal.
B. = , Defrost by Hot Gas from the compressor reversal rotary.
Then, change the value; it is the stop line for defrosting.
At last, to configure other parameters.

This is not a step-by-step user manual;
It just shows the key points.
The new user should read the Full-Content Version User Manual

https://www.thermo-hygro.com/
Haswill Electronics
STC-2304 Defrost Fan Thermostat
https://www.thermo-hygro.com
Copyright Haswill-Haswell All Rights Reserved

References

• Haswill Electronics - An exporter of digital temperature devices from China
• STC-2303 Temperature Controller ❆ Manufacturer & Factory

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