Description

VAC2/S-15E 15A 4kW 230V Single Phase Switched Fan Speed Controller

The VAC2/S-15E Single Phase Switched Fan Speed Controller is a robust and compact variable phase-angle regulator designed for precise control of single-phase mains-driven inductive loads. Rated at 15A for 230V applications, it provides adjustable 0–98% output for accurate control of induction motors, fans and pumps.

Featuring an integrated ON/OFF switch, minimum set-speed adjustment, large TRIAC for high inrush current handling, and an integral R-C snubber network, the VAC2/S-15E provides reliable and flexible speed control for HVAC, ventilation and industrial applications.

Important: For 15A operation, the controller must be mounted to a suitable heatsink or panel rated at 2°C/W or better. Heatsink paste is essential between the controller and heatsink to ensure effective thermal bonding.

The package includes the controller, control knob, label, and printed datasheet.

Key Features:

• Adjustable Output: 0-98% for tailored control of equipment demands.
• High Inrush Protection: Large TRIAC accommodates high startup currents.
• Minimum Speed Adjuster: Ensures efficient motor operation at optimal speeds.
• Compact Design: Durable enclosed construction with easy single-hole mounting.
• Integrated R-C Snubber: Smooths inductive loads for stable operation.

Technical Specifications

• Controller Type: Single-phase variable phase-angle fan speed controller
• Maximum RMS On-State Current: 15A
• Minimum Operating Current: 200mA
• Triac Limiting RMS On-State Current: 25A
• Peak One-Cycle Surge @ 10ms: 250A
• Peak One-Cycle Surge – HS Model @ 10ms: 300A
• I²t for Fusing: 112 A²s
• Output Range: 0–98% variable
• Mains Supply: 230V AC ±10%
• Operating Frequency: 50/60Hz
• Isolation Voltage: 2500V RMS
• Maximum Recommended Unit Temperature: 70°C
• Maximum Cable Temperature: 105°C
• Maximum Recommended Load @ 20°C Ambient: 10A without additional heatsink
• Maximum Recommended Load @ 40°C Ambient: 5A without additional heatsink
• Minimum Speed Adjustment: Rear-access cermet adjustment
• Switching: Integrated ON/OFF switch
• Cooling Requirement: Suitable heatsink/panel rated at 2°C/W or better for 15A operation

Operation

The VAC2/S-15E uses variable phase-angle control to regulate the voltage supplied to single-phase inductive loads. Its 0–98% variable output provides smooth adjustment of fan and motor speed.

The integrated ON/OFF switch allows convenient local operation, while the rear minimum-speed adjuster enables installers to establish a suitable minimum output voltage. This helps prevent connected motors from operating too slowly.

A large TRIAC provides increased capability for high starting and inrush currents. The integrated R-C snubber network is designed to improve switching performance when controlling inductive loads such as motors and fans.

Applications

The VAC2/S-15E is ideal for single-phase induction motors, ventilation fans, HVAC systems, industrial fans, extraction systems, pumps, air-handling equipment, building ventilation, commercial ventilation systems and other suitable mains-driven inductive loads.

Benefits

• Precise variable fan and motor speed control
• Integrated ON/OFF switching
• Adjustable minimum motor speed
• High inrush current handling
• Compact enclosed construction
• Suitable for 230V applications
• Improved inductive-load performance with R-C snubber
• Easy single-hole installation
• Reliable phase-angle power regulation
• Suitable for HVAC and industrial applications

Safety & Installation

• Installation should only be carried out by suitably qualified personnel.
• Isolate the mains supply before installation, adjustment or maintenance.
• Heatsink paste is essential between the controller and heatsink/panel to provide effective thermal bonding.
• For 15A operation, mount the unit to a suitable heatsink/panel rated at 2°C/W or better.
• Ensure adequate ventilation around the controller.
• The minimum-speed adjustment is accessed through the rear cover hole beneath the adhesive label.
• Adjust the cermet screw using a small terminal screwdriver.
• Verify the correct 230V supply before commissioning.

Quick VAC Controller Selection Guide

Your requirement	Recommended model
110V, 15A, variable speed	VAC1-15E (A72150)
110V, 15A, variable speed + ON/OFF switch	VAC1/S-15E (A72160)
230V, 15A, variable speed	VAC2-15E (A72225)
230V, 15A, variable speed + ON/OFF switch	VAC2/S-15E (A72226)
Need minimum speed adjustment	All four models
Need integrated ON/OFF switch	VAC1/S-15E or VAC2/S-15E
110V application	VAC1 models
230V application	VAC2 models

 Which VAC fan controller is right for my application?

The easiest way to select a VAC controller is to consider three things: supply voltage, load requirements and whether you need an integrated ON/OFF switch.

• 110V application? Choose a VAC1 model.
• 230V application? Choose a VAC2 model.
• Need an integrated ON/OFF switch? Choose an /S model.
• Need variable speed control only? Choose the standard model.

Important: Always verify the motor’s compatibility with phase-angle speed control and check the actual running current, starting characteristics, ambient temperature and thermal requirements before selecting a controller.