Worcester Bosch GREENSTAR 25SI User Manual

Greenstar 25SI / 30SI - Quick User Guide
1. Master switch for on / off
2. Central heating temperature control
3. Domestic hot water temperature control
4. Mains on / off indicator and fault diagnostic light
5. Burner on indicator light (green)
6. Eco button (Domestic hot water preheat on/off)
7. Fault reset button
8. System pressure gauge
9.Position for optional programmer
SWITCHING THE BOILER ON/OFF
Switching on
Switch on the boiler by pressing the main power
button. The indicator light shows blue
Switching off
Turn the temperature control knob to the
snowake symbol to switch off the central
heating
BOILER FROST PROTECTION
If the temperature within the boiler falls below 8°C
the pump will run to circulate water and prevent
the system freezing. If the temperature within the boiler falls below 5°C the boiler will
re periodically, bringing the boiler temperature up to 12°C to avoid the possibility of the
system freezing.
SETTING TEMPERATURE FOR YOUR HEATING
Turn the temperature control knob to the
desired level. This is the temperature the
boiler will heat the radiator water to. The
control knob should generally be set to 4
or 5. Lower for smaller homes, higher for
larger homes. Set your room thermostat for
room temperature
RADIATOR -
WATER TEMP
Min---40°C
1 --- 47°C
2--- 53°C
3--- 61°C
4--- 68°C
5--- 74°C
6--- 80°C
Max---82°C
SETTING TEMPERATURE FOR YOUR HOT WATER
The hot water temperature can be set to between
approximately 40°C and 60°C using the temperature
control. The minimum on the dial is 40° the maximum is
60°C The optimum setting is 4 which is 53°C.
THIS INFORMATION IS FROM THE MANUAL LEFT WITH YOUR NEW SYSTEM,
PLEASE REFER TO THIS FOR MORE INFORMATION

Worcester Bosch GREENSTAR 25SI Specifications

General

Brand	Worcester Bosch
Model	GREENSTAR 25SI
Category	Boiler
Language	English

Summary

Boiler Controls and Operation

Switching Boiler On and Off

Turn the boiler on using the main power button and off by setting the temperature knob to the snowflake symbol.

Boiler Frost Protection

The boiler automatically circulates water or fires periodically to prevent freezing below 8°C and 5°C respectively.

Setting Heating Temperature

Adjust the control knob for radiator water temperature. Generally set to 4 or 5, lower for smaller homes, higher for larger.

Setting Hot Water Temperature

Set the hot water temperature between 40°C and 60°C. The optimum setting is 4 (53°C).

Central Heating System Control

Setting Timers and Room Thermostats

Set the timer for heating times and the room thermostat to the desired temperature for optimal comfort.

Thermostatic Radiator Valve Adjustment

Adjust the settings on each radiator valve to achieve desired heat output in individual rooms.

MT10 Timer Operation

Understand the ON, CLOCK SYMBOL, and OFF settings of the MT10 timer for heating control.

Boiler Features and Troubleshooting

Domestic Hot Water Pre-Heat

Utilize the ECO button to control pre-heat mode, reducing wait time for hot water.

Fault Condition Indicators

Recognize flashing reset buttons and mains indicator lights indicating a fault and how to reset.

Heating Not Coming On

Troubleshoot heating issues by checking thermostat settings and timer configurations.

Radiator Issues and Cloudy Water

Address radiators not heating evenly and understand the cause of cloudy hot water.