EUROSTER 813 User Manual

EUROSTER 813 – USER MANUAL 1
EUROSTER 813
INTRODUCTION
The Euroster 813 is a din-rail mount Solar controller for a domestic water heating system.
It is designed to be used as differential temperature controller to control a solar collector
and maximum 2 storage tanks subject to the chosen operating mode.
The controller is able to control an auxiliary heating (boiler or electric) elements to provide
supplementary heat. Users can program the required time schedule to automatically start-stop
the auxiliary heating.
The unit provides 4 operating modes for users to choose from. A preventive measure is build-
in to prevent error from occurrence whilst in selecting the required operating mode. Graphic
of each required mode that will be shown on the LCD of the unit,as below.
Graphic descriptions to operation logic in each of 4 operating modes:
Normally Closed (before setpoint/limitation)
Normally Opened (before setpoint/limitation)
Mode-1: 2 sensor operation with 1 storage tank
S1 - Solar collector temperature sensor
S2 - Lower storage tank temperature sensor

EUROSTER 813 Specifications

General

Power supply	24 V AC/DC
Temperature measurement accuracy	±0.5 °C
Display	LCD
Mounting	Wall-mounted
Temperature setting range	5 – 35°C
Hysteresis	0.1 to 5 °C
Output	Relay
Accuracy	+/- 0.5 °C

Summary

Unit Features and Controls

Key Operational Features

Details anti-seizing and overheating protection functions.

Protection Functions

Overheating Protection Logic

Explains overheating protection in the collector and storage tank.

Anti-Frost Protection

Details the anti-frost protection feature and its configuration.

Temperature Differential (ΔΤ) Settings

Configuration of differential temperature setpoints for S1-S2 and S2-S3.

Settings and Functions

Setpoint and Hysteresis Configuration

Installation and Wiring

Wiring Diagram and Connections

Illustrates the electrical wiring connections for the unit.

Mounting and Settings Adjustment

Internal Settings Adjustment

Guides users on how to set and adjust internal parameters.

Operational Alerts and Safety Functions

Protection Function Alerts

Explains LCD indications for overheating and sensor errors.

Anti-Legionella Function Activation

Steps to activate and configure the anti-legionella heating cycle.

System Operations and Maintenance

Anti-Legionella Failure Alert

Test Mode Procedures

How to test the functionality of Output A and Output B.