Immersion Heater and Trace Heating Products

Immersion Heater 3kW

The LPC Requirements State That

• The heater must not burn out when exposed to air (e.g. when the tank water level is below the immersion heater).
• It must be of dual element type, each capable of operating independently.
• It must be capable of being maintained without the need to drain the tank.

To comply with these requirements we have introduced the following features:

An Immersion Heater Complete With:

• Two separate independently operable, withdraw able elements each 840mm long.
• Each element rated at 1.5kw 240volt single phase.
• Both elements enclosed in a stainless steel tube complete with 2.25” BSPF (ext) boss to allow the elements to be removed, if necessary, without lowering the tank water level.
• An enclosed thermal cut out set to operate if the element temperature exceeds 70oC. The cut out will re-set when the temperature drops to a safe value.
• A weatherproof IP 55 enclosure containing, 5.1) An air temperature sensor set to operate when the ambient air temperature falls to 5oC. 5.2) A triple pole interlocked isolating switch, to also isolate the test circuit, this conforms to the IEE regulations for switching and isolation of immersion heaters. Reg 554-05-03.5.3) All necessary terminations including an earth stud to allow bonding to the tank.

Although an air temperature sensor is not specified by the LPC it has been incorporated in the heater in order to save energy and therefore reduce running costs by turning the heater off when the ambient air temperature is above 5oC.

Immersion Heater Test Units

Operation

The system is fully automatic and needs no day to day adjustment or setting Procedure. With the mains connected and power on lamp illuminated the units are operated automatically when the air temperature drops below 5oC, this is achieved by the externally mounted thermistor probe within the immersion heater.

Under normal operating conditions the heater on lamp will be illuminated and the current being drawn by the immersion heater will be indicated on the ammeter.

Should the air temp be above 5oC and the unit is in stand-by mode the power on lamp only will be illuminated and no reading will be shown on the ammeter.

To test immersion heater when unit is in stand-by mode, press the green test button. After about 2 seconds the ammeter will show the current being drawn and the heater on lamps will illuminate. Releasing the button will return the unit to stand-by.

Maintenance

The units require little or no maintenance, the switchgear, contactor and M.C.B. should be maintained as normal for this type of equipment.

A periodic test of the equipment can be carried out by pressing the green test button.

The units are rated single phase 240 volts A.C. input.

All contactors are rated at 20 amps.
Ammeter and M.C.B. are rated at 16 amps.