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BZ Self-Priming Centrifugal Pump

Complete Installation Guide

1. Pre-Installation Preparation

1.1 Site Requirements

• Foundation must be level, stable, and vibration-free
• Ambient temperature ≤ 40°C
• Adequate ventilation for motor cooling
• Sufficient space for maintenance access (minimum 1m around pump)

1.2 Tools Required

• Leveling instrument
• Torque wrench
• Alignment tools
• Lifting equipment (for pumps >50kg)
• Sealant and gaskets

2. Foundation Installation

2.1 Base Plate Mounting

1. Prepare concrete foundation with minimum 150mm thickness
2. Install anchor bolts according to base dimensions
3. Place base plate and level using precision level (tolerance: 0.1mm/m)
4. Grout base plate with non-shrink grout
5. Allow 48 hours curing time before pump installation

3. Pump Installation

3.1 Positioning

1. Use lifting equipment to position pump on base
2. Align pump centerline with foundation marks
3. Install vibration isolation pads if required
4. Tighten mounting bolts to specified torque (refer to manual)

3.2 Motor-Pump Alignment

Alignment Type	Tolerance	Method
Parallel Misalignment	≤ 0.05mm	Dial indicator
Angular Misalignment	≤ 0.05mm/m	Feeler gauge

4. Piping Connection

4.1 Suction Piping

• Keep suction pipe as short as possible (max 5m recommended)
• Pipe diameter ≥ pump inlet diameter
• Install eccentric reducer (flat top) to prevent air pockets
• Ensure airtight connections (use thread sealant)
• Install foot valve for suction lift applications

4.2 Discharge Piping

• Install check valve to prevent backflow
• Install gate valve for flow control
• Install pressure gauge near pump outlet
• Support pipes independently (do not transfer weight to pump)

5. Electrical Connection

5.1 Motor Wiring

1. Verify voltage matches motor nameplate (380V/50Hz standard)
2. Use appropriate cable size per motor power
3. Install overload protection and short-circuit protection
4. Ensure proper grounding (ground resistance ≤ 4Ω)
5. Check rotation direction (clockwise from motor end)

6. Pre-Start Checklist

Item	Check	Status
Foundation bolts	Tightened to torque	☐
Alignment	Within tolerance	☐
Bearing lubrication	Grease applied	☐
Priming water	2/3 chamber filled	☐
Rotation direction	Clockwise	☐
Valve positions	Suction open, discharge partially open	☐

7. Commissioning

7.1 First Start Procedure

1. Fill pump chamber with clean water (2/3 volume)
2. Open suction valve completely
3. Open discharge valve 1/4 position
4. Start motor and check rotation
5. Gradually open discharge valve to desired flow
6. Monitor current, vibration, and noise
7. Check for leaks at seals and connections

7.2 Running Parameters

Parameter	Normal Range	Action if Abnormal
Bearing Temperature	< 80°C	Stop and check lubrication
Vibration	< 4.5 mm/s	Check alignment
Noise Level	< 75 dB	Check for cavitation
Motor Current	≤ Rated current	Check load condition

8. Common Installation Mistakes

9. Documentation

Keep records of:

• Installation date and technician
• Alignment measurements
• Commissioning parameters
• Initial vibration baseline

10. Contact Support

For technical assistance: Shanghai Chaodun Machinery Manufacturing Group Co., Ltd.

Website: https://cd-pump.com