Light commercial heating and cooling systems require long-term continuous operation. When the primary pump fails unexpectedly, system interruption can lead to service disruptions and equipment damage. Some countries and regions (such as Russia) have enacted mandatory regulations requiring dual-pump redundancy in commercial systems.

Traditional single-pump systems lack intelligent switching mechanisms, leading to uneven wear, shortened service life, and rising maintenance costs.

 Through integrated relay control, Relay Module for Double Pump System supports three operating modes (Alternating, Standby, Single), enhancing system stability, extending pump service life, and reducing maintenance costs. It is suitable for medium circulation in light commercial heating and cooling systems.

Product Overview

This module is compatible with multiple Shinhoo pump models and is widely used for medium circulation in light commercial and industrial heating and cooling systems. Typical applications include three-story hotels, commercial pump rooms, and other high-reliability facilities.

Core concept:
One duty pump + One standby pump. Dual protection for continuous operation.

System Architecture & Operating Modes

The relay module supports three switchable operating modes:

Alternating Mode

  • 24h automatic switchover and fault self-start, enhancing durability

  • 24h automatic alternation

  • Automatic fault switchover

Standby Mode

  • One duty, one backup, delivering dual safety assurance

Single Pump Mode

  • Energy-efficient independent operation for lower demand

  • Optimized operation during low-demand periods

Key Benefits

  • System stability ↑70% – Smooth, consistent supply

  • Product lifespan ↑50% – Robust and durable

  • Maintenance cost ↓50% – Less frequent servicing

Flexible Maintenance Scheduling

New relay module for double pump  technology – compatible with multiple Shinhoo models.

Engineering Design & Installation Features

  • Modular direct mounting – quick and easy wiring

  • Integrated design with clear speed settings and real-time status monitoring

  • Interfaces: Power, Speed adjustment, Communication cable

  • Intuitive Control & Status Indication

Safety Note: Disconnect power before removing terminal box cover.

Application Scenarios

  • Three-story and above hotel hot water and heating circulation systems

  • Commercial pump room dual-pump redundancy configurations

  • Light commercial heating system medium circulation

  • Small commercial cooling system medium circulation

  • Heating systems requiring compliance with relay module for double pump system configuration regulations in some regions 

FAQ

What is the relay module for double pump system used for?
It coordinates two pumps in one system, ensuring automatic takeover when one pump fails. It is suitable for medium circulation in light commercial heating and cooling systems.

Why do commercial systems need relay module for double pump system configuration?
Regulations in some regions (such as Russia) mandate duty and standby pumps in commercial heating and cooling systems to ensure continuous operation and prevent service interruptions caused by single-pump failure.

What operating modes does the system support?
Three modes: Alternating Mode (24h automatic switchover and fault self-start), Standby Mode (one duty, one backup), and Single Pump Mode (energy-efficient independent operation for lower demand).

What happens if one pump fails?
In Alternating or Standby mode, the standby pump automatically takes over to ensure continuous water supply or medium circulation. In Single Pump mode, automatic switchover does not occur.

Which pump models are compatible?
The module is compatible with multiple Shinhoo pump models. It can be integrated within the relay module for double pump terminal box or paired with single pumps to form a relay module for double pump system.

Is installation complicated?
No. The module features modular direct mounting with clear interfaces for quick and easy wiring. Professional technicians can complete installation and deployment quickly.