1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your CGHMB1004M4-24D Horizontal Multistage Pressure Booster Pump. Please read this manual thoroughly before operating the pump to ensure proper function and longevity.

Figure 1: CGHMB1004M4-24D Horizontal Multistage Pressure Booster Pump with 24Ltr Water Tank.
The CGHMB1004M4-24D is a robust and reliable pressure booster pump designed to provide consistent water pressure for various applications, including residential homes, villas, small buildings, and greenhouses. It features a high-efficiency motor, durable components, and automatic operation for optimal performance.
2. Safety Instructions
Always observe the following safety precautions to prevent injury and damage to the pump:
- Electrical Safety: Ensure the pump is connected to a properly grounded electrical outlet. Do not operate the pump with wet hands or in standing water. Disconnect power before performing any maintenance or repairs.
- Water Quality: This pump is designed for clear water without sand or other solid impurities. Using it with contaminated water can cause damage.
- Installation: Installation should be performed by a qualified professional. Ensure proper ventilation and adequate space around the pump for operation and maintenance.
- Temperature: Do not operate the pump in temperatures outside its specified range. Protect the pump from freezing.
- Children and Pets: Keep children and pets away from the pump during operation.
3. Product Components
The CGHMB1004M4-24D pump consists of several key components working together to ensure efficient pressure boosting:
- Energy Efficient Motor: High-efficiency powder coated aluminium extruded motor body with 100% copper winding, ensuring reliable water pressure boosting with minimal energy consumption. The TEFC motor comes with Class F insulation for high temperature protection.
- Impeller: Features a SS 304 impeller, providing better durability and consistent performance by ensuring smooth water flow and reducing wear over time.
- Pump Casting: Cast iron components coated with a CED layer for superior rust resistance, enhancing durability and longevity.
- Pump Seal: A high-quality mechanical seal prevents water from entering the motor, contributing to the pump's longevity and efficient performance.
- Pressure Switch: Equipped with a Danfoss pressure switch, ensuring optimal performance and protection against over-pressure, while maintaining consistent water pressure.
- Water Tank: Fitted with a 24 litre steel water tank with a rubber diaphragm arrangement to maintain pressure and prevent short cycling of the pump.
- Y-Strainer: Filters out debris, rust, sand, and other solid particles from the water before it enters the pump, preventing clogging or damage to impellers and seals.

Figure 2: Detailed view of the pump head and pressure tank connection.
4. Setup and Installation
Proper installation is crucial for the pump's performance and lifespan. It is recommended that installation be carried out by a qualified technician.
- Site Selection: Choose a dry, well-ventilated location, protected from direct sunlight, rain, and freezing temperatures. Ensure the pump is placed on a stable, level surface.
- Plumbing Connections: Connect the pump to the water supply using appropriate piping. Ensure all connections are watertight to prevent leaks. The pump has standard inlet and outlet ports.
- Electrical Connection: Connect the pump to a dedicated, grounded electrical circuit with the correct voltage and current rating. Ensure the power supply matches the pump's specifications.
- Priming: Before initial operation, ensure the pump is properly primed by filling the pump casing with water through the designated priming port until it overflows.
- Check for Leaks: After all connections are made, slowly open the water supply and check for any leaks.

Figure 3: Back view of the pump illustrating plumbing connections.
5. Operating Instructions
The CGHMB1004M4-24D pump is designed for automatic operation, maintaining consistent water pressure as needed.
- Initial Start-up: After installation and priming, switch on the power supply. The pump will automatically start and build pressure in the system.
- Automatic Operation: The integrated pressure switch monitors the system pressure. When water is drawn and pressure drops below a set point, the pump automatically turns on. When water flow stops and pressure reaches the upper set point, the pump turns off.
- Consistent Pressure: The 24-liter pressure tank helps maintain stable water pressure and reduces the frequency of pump cycling, extending its lifespan.

Figure 4: The pump features automatic operation for convenience.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your pump. Always disconnect power before performing any maintenance.
- Y-Strainer Cleaning: Periodically inspect and clean the Y-strainer to remove any accumulated debris. This prevents clogging and damage to the pump.
- General Inspection: Regularly check for any signs of leaks, unusual noises, or vibrations. Address any issues promptly.
- Rust Prevention: The pump's cast iron components are coated with a CED layer for superior rust resistance. Keep the pump in a dry environment to further prevent corrosion.
- Winterization: In cold climates, drain the pump and piping to prevent freezing and potential damage during winter months.

Figure 5: The pump features a rust preventive CED coating for enhanced durability.
7. Troubleshooting
Refer to the table below for common issues and their potential solutions. If the problem persists, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power supply; tripped circuit breaker; faulty wiring; motor overload. | Check power connection; reset breaker; inspect wiring (call electrician); check for motor overload protection activation. |
| Pump runs but no water flow | Pump not primed; clogged suction line/Y-strainer; air leak in suction line; low water level in source. | Prime the pump; clean Y-strainer; check suction line for leaks; ensure adequate water supply. |
| Low pressure or inconsistent flow | Partially clogged Y-strainer; air in system; pressure tank pre-charge incorrect; excessive water demand. | Clean Y-strainer; bleed air from system; check and adjust pressure tank pre-charge; reduce simultaneous water usage. |
| Pump cycles too frequently | Pressure tank pre-charge too low; water leak in system; faulty pressure switch. | Check and adjust pressure tank pre-charge; inspect plumbing for leaks; replace pressure switch if faulty. |
| Unusual noise or vibration | Air in pump; cavitation; worn bearings; foreign object in impeller. | Bleed air; ensure adequate water supply; contact service for inspection of internal components. |
8. Technical Specifications
Key technical details for the CGHMB1004M4-24D Horizontal Multistage Pressure Booster Pump:
| Feature | Specification |
|---|---|
| Model Number | CGHMB1004M4-24D |
| Power | 0.75 kW / 1 HP |
| Stages | 4 Stage |
| Water Tank Capacity | 24 Litre (Steel with rubber diaphragm) |
| Motor Type | High-efficiency powder coated aluminium extruded motor body, Copper Motor, TEFC |
| Motor Insulation | Class F |
| Impeller Material | SS 304 |
| Pump Casting | Cast Iron with CED layer |
| Pump Seal | High-quality mechanical seal |
| Pressure Switch | Danfoss |
| Product Dimensions (LxWxH) | 63 x 35.5 x 53.5 cm |
| Item Weight | 22 kg |
| Country of Origin | India |
9. Warranty Information
The CGHMB1004M4-24D Horizontal Multistage Pressure Booster Pump comes with a 1-year warranty from the date of purchase, ensuring assured performance and support. This warranty covers manufacturing defects and material faults under normal operating conditions.
Please retain your purchase receipt as proof of warranty. For any warranty claims or service requests, refer to the customer support section.

Figure 6: The pump is backed by 12 months of assured performance and support.
10. Customer Support
For technical assistance, service requests, or any inquiries regarding your CG pump, please contact our customer support:
- Toll Free No.: 1800-267-0505
- Operating Hours: Monday to Saturday, 8 AM to 6 PM
- Email: cgcp.care@cgglobal.com
CG has a wide network of over 400 service centers across India to provide prompt and efficient support.