3 BOILER CONTROLS

1.CENTRAL HEATING THERMOSTAT

This thermostat controls the temperature of the water leaving the boiler for the heating system. For maximum output from the radiators the thermostat should be turned fully clockwise i.e. maximum output. If lower heating temperatures are required, turn the thermostat anti-clockwise.

2. DOMESTIC HOT WATER THERMOSTAT - HE CB25/33 only

This thermostat controls the temperature of the domestic hot water leaving the boiler. For maximum hot water temperatures the thermostat should be left at maximum i.e. fully clockwise. If lower temperatures are required, turn the thermostat anti-clockwise.

3. SELECTOR SWITCH

This control allows the boiler to provide central heating and hot water or hot water only.

Note: The internal clock and frost thermostat will not operate when the switch is in the vertical position, i.e. 'Off' position (0).

4. PRESSURE GAUGE

This indicates the central heating system pressure. It should always be within the green band when cold, increasing slightly when hot.

If the pressure falls below the green band, i.e. lower red area, refer to the label on the inside of the hinged control panel cover for guidance on re-pressurising the system. Or contact your Installer to have the system checked and pressurised.

Note: The bleeding of radiators will cause the pressure to fall and the system will require re-pressurising after doing so.

5. INDICATOR NEONS

When neon A (red) and neon B (yellow) are illuminated, the following conditions apply:-

Neon

BFlashing very slowly (every 5 seconds) - Electricity supply to the boiler is on.

BIlluminated continuously - Burner is alight.

BFlashing on and off - Temperature sensor fault, contact your Service Engineer.

AFlashing on and off - Overheat or flue thermostat has operated. Rotate selector switch to the reset position (3) to reset. If this continues to happen, contact your Service Engineer.

AIlluminated continuously - Burner has failed to light. Rotate selector switch to the reset position (3) and the ignition sequence will restart after a delay of about 30 seconds.

A and B Flashing on and off at the same time - Blocked flue or fan fault, contact your Service Engineer. A and B Flashing on and off alternately - System pressure is very low and re-pressurisation is required. A Illuminated continuously and B flashing - Pump fault or restricted flow.

6. OVERHEAT THERMOSTAT

This thermostat automatically switches the boiler off in the unlikely event of the boiler overheating. When the thermostat operates, the red neon (A) flashes on and off. Rotate the selector switch to the reset position (3) and the boiler will relight.

If this continually happens, contact your Service Engineer.

7. PRESSURE RELIEF VALVE

If the central heating system overheats and steam or water is discharged from the pipe connected to this valve, turn the boiler off and contact your Service Engineer. Your Installer should have shown you where this pipe terminates, usually outside your dwelling.

8. FROST THERMOSTAT

The boiler has a built-in frost thermostat, which automatically operates the boiler if the water temperature falls below 8°C, providing the electrical supply is on and the selector switch is set to position (1) or position (2).

Alpha HE CB/SY

3

Page 2 Page 4
Page 3
Image 3
Alpha Tool.Com.HK Limited HE CB33, HE SY25 manual Boiler Controls
Page 2 Page 4

HE CB33, HE SY25 specifications

Alpha Tool.Com.HK Limited has emerged as a key player in the construction machinery market, particularly known for their compact and efficient machines. Among their impressive lineup, two standout products are the HE SY25 and HE CB33. These models cater to a diverse range of construction needs, boasting advanced technologies and exceptional performance characteristics.

The HE SY25, a compact mini excavator, is designed to offer versatility and efficiency in tight workspaces. Its powerful engine and hydraulic system are engineered to provide a high level of performance, ensuring that tasks such as digging, lifting, and trenching are executed with ease. With a maximum digging depth of around 2,300 mm and a bucket digging force of 20 kN, the SY25 demonstrates impressive excavation capabilities. The machine is also equipped with a surprisingly compact design that enables operators to maneuver in confined areas, making it ideal for urban construction projects.

In terms of technology, the HE SY25 features user-friendly controls and an ergonomic design, enhancing operator comfort and productivity. Its advanced hydraulic system offers smooth and precise movements, allowing for better control during operations. The cabin is designed with visibility in mind, providing operators with a clear view of the working area, which is crucial for safety and efficiency.

On the other hand, the HE CB33 is a versatile and robust compact loader that distinguishes itself with its exceptional load capacity and stability. With a rated operating capacity of approximately 1,400 kg, the CB33 offers reliable performance for various tasks, including material handling, construction, and landscaping. The machine's low center of gravity ensures stability during operation, which is particularly beneficial when working on uneven terrain.

The HE CB33 is equipped with a powerful engine, providing the necessary torque and power for demanding tasks. Additionally, its intuitive controls and quick coupling system enhance workflow, allowing for the rapid attachment and detachment of implements. This flexibility makes the CB33 an invaluable asset on any job site.

Both the HE SY25 and HE CB33 feature durable construction, ensuring longevity and resilience even under the toughest working conditions. With their impressive combination of power, efficiency, and user-friendly design, these models from Alpha Tool.Com.HK Limited are well-suited for addressing the diverse challenges faced in modern construction environments. As the industry evolves, these machines stand out as reliable tools for professionals looking to enhance productivity and job effectiveness.
Top Page Image Contents