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Introduction
Heater
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Heater
The A-Series 530 lb-in actuator includes a factory-installed heater that prevents
condensation from forming inside the actuator.
Units with On/Off actuation use a Positive Temperature Coefficient (PTC) style heater
which has a unique temperature – resistance characteristic. The heater self-regulates
by increasing its electrical resistance relative to is temperature. The heater does not
require external thermostats or switches to control its heat output.
120V On/Off units require a dedicated live feed to power the heater.
Modulating units use a resistive element controlled by an on-board thermostat.
The heater must have a constant power supply to be effective. Power should be
supplied to the heater through a conduit entry with an appropriate sealing gland.
WARNING
The heater surface can reach temperatures above 392°F (200°C).
Principle of Operation
The A-Series 530 lb-in actuator is divided into two internal sections: the drive train
below the switch plate, and the motor and control center above the switch plate. Below
the switch plate, the motor drives a system of spur gears. The manual declutch
override for manual operation is housed here as well. User-required, readily
accessible components are placed above the switch plate. The indicator shaft
assembly, limit switches, terminals, heater and electronic controllers are all placed
here for easy access.
External to the unit is a large and easy-to-read indicator, manual declutch override and
dual conduit entry ports. The external coating is a high-quality polyester powder coat,
which has exceptional UV protection and chemical resistance.
Electrical Operation
The gear motors used in the A-Series 530 lb-in actuator are of either permanent split
capacitor (PSC) design (single-phase AC power) or permanent magnet (PM) design
for 24 AC/DC power. Travel limit switches are mechanical form (SPDT) with contacts
rated at 3A 125/250 Vac.
The PSC motor is designed for impedance protection that limits the current and self-
heating in cases where the torque capacity of the unit is exceeded to the point where
the motor stalls. The PM motor controllers implement self-resetting over-current
protection, which will also limit the current and torque capacity of the motor.
09/26/2023
A6V12069989
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