
www.intertec.info
INTERTEC Instrumentation Ltd. · 225 Henry Drive · Sarnia, Ontario N7T 7H5 · Canada · +1 888 875 8756 · [email protected] CP VARITHERM … BI Electric heater
HD653-2c CP VARITHERM …BI page 1/ 3
1 Application
Heating of instrument enclosures in hazardous areas,
designed for
freeze protection
condensation protection
temperature maintenance
preferably horizontal installation.
2 Special Features and Advantages
Horizontal design allows for optimum installation of the
heater underneath the instruments in the enclosure
High heat transfer capabilities due to large surface area
of black anodized aluminium fins
Heater fins can be removed and modified by INTERTEC,
if necessary for installation purposes
3 Description
VARITHERM heaters are finned heaters, heating the air in the
enclosure by convection.
A non-resettable temperature limiter built to ATEX design
specifications is integrated in the core block, cutting off the
power in case of a technical failure or excessive heating
resulting from an external heat source. For this reason and for
reasons of operational safety the heater must only be
operated under conditions that ensure that the trip
temperature of the limiter will not be exceeded:
The ambient temperature in the enclosure must not
exceed the maximum permissible values.
An additional external TAE or TS thermostat or must be
connected in series and installed on the surface of the
heater to enhance thermal coupling (see 7). Alternatively,
a TC temperature controller can be used.
Ensure effective convection by observing the necessary
clearances as per section 7 on the next page. Take care
not to cover the fins.
A residual-current-operated protective device with a rated
value of not more than 300 mA, preferably 30 mA should be
installed.
A temperature indicator shows potential problems and failures
at an early stage (e.g. incorrect installation). Please check the
application if more than 3 fields have irreversibly changed to
black.
Warranty null and void if Heater strip has been removed from
Heater.
All INTERTEC explosion-proof heaters can also be supplied
in a less expensive, non-explosion-proof design
to American NEC standard (CSA/ NRTL).
to ATEX/ IEC standards
Other types upon request.
For any specific applications requiring high temperature
maintenance we will be pleased to select the suitable
combination of heater and controller.
4 Technical data
EC-Type-Examination
Certificate PTB 02 ATEX 1041X
IEC Scheme Certificate IECEx PTB 07.0052 X
Marking II 2 G Ex d IIC T4, T3, T6
II 2 D Ex td A21 IP65 T135°C,
T200°C
CSA Certificate 1655545 (LR43674)
CSA Type of Protection Cl. 1, Div. 1, Gp ABCD T3/T4
Ingress Protection IP 68
Nominal voltage 230V AC
Connection cable EWKF 3x 1,5mm² 8,1mm Ø
Connection cable for
heaters with alarm ...AM EWKF 5x 1,0mm² 8,8mm Ø
Conduit connection ½“ NPT
Length of connect. cable 39”/ 1 m
Length, width 8.7”/ 220 mm, 8.4”/ 213 mm
Material seawater-proof aluminium, black anodized
5 Types
5.1 for freeze protection
CP VARITHERM
DPA … BI 200 T3 40 300 T3 80 400 T3
100 500 T3
100
Nom. Power 200 W 300 W 400 W 500 W
Temp. class T3 T3 T3 T3
Height 1.6”/40mm 3.1”/80mm 3.9”/100mm 3.9”/100mm
5.2 for temperature maintenance to 40° C
CP VARITHERM
DPA … BI 200 T3 100 300 T3 100 125 T4 100
Nominal power 200 W 300 W 125 W
Temperature class T3 T3 T4
Height 3.9”/100mm 3.9”/100mm 3.9”/100mm
Temperature control must be provided by an additional TAE
thermostat or TC temperature controller.
Don’t remove the adapter!
Remove just the red
rotection
cap for conduit installation