Description

VAC1-15E Single Phase Fan Speed Controller (15A, 1.6kW, 110V)

The VAC1-15E 15A Single Phase Fan Speed Controller is a robust and compact enclosed phase-angle regulator designed for infinitely variable control of single-phase mains-driven inductive loads. Rated for 110V AC operation and up to 15A, it provides adjustable voltage output from 0–98%, making it suitable for controlling induction motors, fans, pumps, and other HVAC equipment.

The VAC1-15E incorporates a large TRIAC for high inrush-current protection and an integral RC snubber network for reliable operation with inductive loads. A rear-mounted minimum speed adjustment allows the user to set a minimum output level, preventing motors from operating too slowly and helping to protect connected equipment.

⚠️ 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:

• Variable 0-98% Output: Allows precise control.
• Minimum Set Speed Adjuster: Tailor minimum output to optimise motor speeds.
• High Inrush Current Handling: Triac design for industrial reliability.
• RC Snubber Network: Stabilises inductive loads for enhanced performance.
• Easy Installation: Single-hole fixing, with front panel mounting aids.
• Convenient Installation: Includes adhesive-backed silver label and hairline knob.

Technical Specifications

• Controller Type: Single-phase variable phase-angle fan speed controller
• Supply Voltage: 110V AC ±10%
• Operating Frequency: 50/60Hz
• Power Rating: 1.6kW
• 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: 112A²s
• Isolation Voltage: 2500V RMS
• Variable Output: 0–98%
• 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-mounted cermet adjustment
• Load Type: Single-phase inductive loads
• Cooling Requirement: Suitable heatsink/panel rated at 2°C/W or better for 15A operation
• Heatsink Interface: Heatsink paste required
• Mounting: Single-hole fixing
• Enclosure: Enclosed fan controller

Operation

The VAC1-15E uses phase-angle voltage regulation to provide infinitely variable control of single-phase fan and motor loads. By adjusting the controller, the voltage supplied to the connected motor can be varied from minimum to maximum, allowing the operating speed of compatible fans and motors to be controlled.

The integrated minimum set-speed adjuster prevents the motor from operating below a selected minimum voltage. This is particularly useful where a fan must maintain a minimum airflow or where excessively low motor speeds could affect motor performance.

An integral RC snubber network improves the controller’s performance when switching inductive loads, while the large TRIAC provides additional protection against high starting and inrush currents.

Applications

The VAC1-15E is ideal for HVAC fan control, ventilation systems, extraction fans, air handling systems, industrial fans, induction motors, pump speed control, cooling fans, heating and ventilation equipment, commercial ventilation systems and industrial fan and pump applications.

Benefits

• Precise infinitely variable fan speed control
• 0–98% adjustable output
• Designed specifically for inductive motor loads
• Minimum speed adjustment helps prevent under-speed operation
• Large TRIAC handles high inrush currents
• RC snubber improves inductive-load performance
• Compact enclosed construction
• Suitable for HVAC and industrial environments
• Simple installation and adjustment
• Reliable solid-state operation

Installation & Cooling Requirements

• Installation should only be carried out by suitably qualified personnel.
• Isolate the mains supply before installation or maintenance.
• For 15A operation, mount the controller to a suitable heatsink or panel rated at 2°C/W or better.
• Heatsink paste is essential between the controller and heatsink surfaces to provide effective thermal transfer.
• Do not operate the controller without adequate heatsinking.
• Ensure the connected motor or fan is compatible with phase-angle speed control.
• The minimum speed adjustment is accessed through the rear cover hole.
• Adjust the cermet screw using a suitable small terminal screwdriver.
• Ensure adequate ventilation around the controller and heatsink.

Quick VAC Controller Selection Guide

 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.