GS20 Series Water Pump Drive used on HVAC in Shanghai, China

Project Overview

Site: Shanghai Атр mall
Date: August 2025
Location: China
Industry: HVAC
Project scope: Improve energy efficiency, intelligence, and stability of HVAC cooling water pump system
VEICHI deliveries: GS20 series general pump drive

Project Introduction

Driven by greener goals and smarter cost control, today’s commercial buildings demand higher HVAC efficiency than ever.

The Атр mall is one of the most popular shopping centers among local residents. It features 24-hour supermarkets, cinemas, children's theaters, restaurants, and more. With a total area exceeding 100,000 square meters, indoor comfort is paramount. The mall's original HVAC pumps ran at a fixed speed, relying on valves and bypasses for flow control, which resulted in high energy waste, poor regulation accuracy, high inrush current, and accelerated equipment wear.

To improve energy efficiency, intelligence, and stability, the mall opted for a variable frequency retrofit to its central air-conditioning cooling water pump system.

The Solution:

To tackle these challenges, the GS20 series dedicated pump drives were deployed to drive the circulating pump system with variable frequency control. The system operates on a “Three Duty / One Standby” basis: one master pump, two slaves, and one backup. Master dynamically adjusts its own and the slaves output in response to real-time pipeline feedback.

Higher Energy Efficiency

Cut energy use by nearly 50% with only 20% speed reduction under low flow.

Precise Control

Even heating/cooling distribution for consistent comfort across zones.

Reliable Operation

Auto-balances pump runtime and backup auto-engages if master fails—no downtime. Full protection, soft start, intelligent pump control, and gentle filling for water hammer and grid shock reduction and smooth speed regulation for wear reduction on pumps, motors, and valves, extending service life and cutting maintenance.

Low Noise

Advanced algorithms and random modulation reduce noise by over 5dB.

Project Products:

GS20 General Pump Drive

Key Features:

• Unmatched Stability
• Optimized Performance
• Superior Efficiency
• Easy Scalability

Rated Voltage & Power: 

• 200V~240V / 0.75kW~55kW
• 380V~480V / 0.75kW~560kW

Output Frequency: 0Hz~599Hz

Overload Capacity: 150% rated current for 98s; 180% for 10s; 200% for 3s

Motor Type: 

• Three-phase asynchronous motor,
• Permanent magnet synchronous motor
• Synchronous reluctance motor

Protection Class: IP20

Dedicated Functions: Multi-pump control, pump-specific sleep mode, pump clean, anti-freeze protection, soft pipe filling, low-speed protection, dry-out protection, inlet/outlet pressure protection