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1.1 Important safety information
This section contains important safety information for the Modul-Connect EV Heater. Each time,
before using the product, READ ALL instructions and cautionary markings on, or provided with the
heater, and all appropriate sections of this guide.
The EV Heater has external and internal fusing, apart from the internal blade fuses (found by
removing the top cover) there are no internal end user serviceable parts.
Please see the Warranty (Section 8) for how to handle product issues.
The Modul-Connect EV Heater utilises 3 off PTC (Positive Temperature Coefficient) heaters to heat
the ambient air temperature.
The surfaces of the PTC heaters are fully electrically insulated, this makes them safer to use and
operate than traditional fixed-resistance heaters that use metallic wires and coils to generate heat,
and Ceramic and semiconductor heating elements.
PTC heaters are self-regulating and run open-loop without any direct diagnostic controls.
They use Positive Temperature Coefficient materials i.e., materials that exhibit a positive resistance
change in response to the increase in temperature.
Such a heater will produce high power when it is cold, and rapidly heat itself up to a constant output
temperature.
Due to the exponentially increasing resistivity, the heater can never heat itself to warmer than its
designed temperature.
Above this temperature its construction acts as an electrical insulator.
Therefore, the PTC heaters in the Modul-Connect EV Heater unit are self-regulating and self-limiting.
Self-regulating means that every point of the heater independently keeps a constant temperature
without the need of additional surface temperature regulating electronics.
Self-limiting means that the PTC heater can never exceed its maximum specified designed
temperature at any point and requires no additional overheat protection. That said, for additional
safety, the PTC heaters are all mounted within a non-conductive and temperature resistant isolated
housing within the heater chassis, so physically double insulated for added safety.
In the event of an ‘overheat’ situation, there are 2 additional designed safety systems built into the
EV Heater.
1. The control system will shut the heater down when the input temperature reaches 52°C and will
not switch back on until the internal temperature is below 30°C. The fan will keep running as to
cool the heater as quickly as possible.
2. In the very unlikely event of a total fan failure, control system failure, or Main power switch
failure, we have included a single use non-resettable thermal fuse if the internal core
temperature of the double insulated housing reaches 110°c the fuse will break contact shutting
off the power to all the PTC heating elements and immediately shut off any heat output.
In its design, the Heater would work purely as a convection heater, however, to maintain the heaters
integrity the temperature output is physically restricted to protect damage to any temperature
sensitive items or equipment that is installed or stored within the vicinity of the heater.
DANGER: Fire and/or Burn Hazard.
Do not cover or obstruct any air vent openings and/or install in a zero-clearance compartment or
restrictive area.
