W. Tombling Ltd.
THIS PAGE APPLIES ONLY TO THE ACTIVAIR ACE FAN HEATER
Element current per phase for different models is given in the table opposite, whatever control method is chosen it must be current rated correctly.
Fan motor control
The fan motor may be switched on/off with the element assembly, or run continuously. Some systems incorporate an additional relay to:
The fan motor in all models (including 3phase heaters) is 240V, single phase, 50Hz. 1.8A full load current.
Operation of fan motor overload or over current protective circuits MUST disconnect the elements.Safety overheat cutout
Each Activair ACE fan heater is fitted with a safety overheat cutout. Under normal conditions the contacts are closed, if the temperature within the heater exceeds safe working conditions the contacts will open. Once the temperature has fallen the cutout will automatically reset.
The cutout is rated 4A (resistive) at 240V. Operation of the cutout should immediately shut down the elements AND fan.Isolation
Activair fan heaters MUST be isolated by a suitable 1ph+N or 3ph+N isolator.
In single phase heaters terminals 2 and 3 are omitted.Circuit diagram
click for circuit diagram
This example illustrates a basic wiring design for a single 3 phase electrical fan heater. It can be expanded on in several ways:
Activair control panels
To simplify and speed up the installation of Activair ACE fan heaters we supply a range of off the shelf control panels. Each one contains all the electrical switchgear necessary for our heaters. Activair control panels feature:
The only external item required is a suitable thermostat, humidisat or time switch.Control device
Activair ACE fan heaters are compatible with a wide range of thermostats, time switches and environmental controllers.
Activair manufactures electronic programmable thermostats specifically designed for use in harsh industrial environments, all of which are suitable for use with our heaters.
In addition we also supply a range of thermostats, humidistats and time switches from other manufacturers.
Copyright © 2002/6, W. Tombling Ltd.