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H050002740 rel. 1.1 - 17.05.2021
W
arnings
ENG
1. WARNINGS
1.1 General warnings
•
The Heosone controller must be incorporated by professionally qualified personnel into a complete unit or system as part
of a fixed installation and, in any case, inside a metal enclosure.
•
This device contains dangerous voltages. Failure to observe the instructions contained in this technical leaflet and in the user
manual may cause serious damage to people and things.
•
The Heosone system controller and components comply with the requirements of standard IEC 60079-15, ed.4, as required
by EN 60335-2-34:2011, EN 60335-2-40/A1: 2007 and EN 60335-2-89: 2011 for the use of hydrocarbons as refrigerants (R290
– propane);
•
The components of the Heosone system are to be used in systems with R290 refrigerant, however applying appropriate
solutions to prevent the risk of explosion at any time (safe zone);
•
The components of the Heosone system are not ATEX certified and cannot for any reason be used in areas with explosive or
flammable atmospheres; the owner, designer and installer are responsible for ensuring strict compliance with the standards
in force in order to avoid all risks;
•
Design of the Heosone system, installation, commissioning and maintenance of the Heosone controller are all operations
reserved for qualified personnel, who have understood all of the safety, installation, operation and maintenance warnings
contained in this technical leaflet and in the user 0300099-, downloadable, even prior to purchase, from www.carel.
com, under “Documentation”.
1.2 Fundamental safety rules
Before carrying out any maintenance work:
disconnect Heosone and the external control circuits from the power supply by moving the main system switch to
“off”; wait at least 5 minutes;
always check, using a suitable multimeter, that there is no dangerous voltage across the terminals;
always make sure that the compressor has stopped completely. Freely rotating motors may generate dangerous
voltages across the terminals on Heosone, even when this is not powered.
Check that the heat sink is not too hot: contact with the heat sink may cause serious burns.
When Heosone is connected to the power supply, the compressor terminals U, V and W are live, even if the motor is
not running.
Never measure insulation resistance or dielectric strength with alternating current, as this may cause faults on some
of the internal components; the Heosone controller is supplied factory-tested for the applied voltage; during final
testing when assembled on the unit, it can therefore be disconnected, or alternatively the test can be performed
using direct current, as specified by the standards.
There may be dangerous control voltage at the relay outputs even when Heosone is not connected to the mains
power supply.
The level of safety provided by the enabling inputs (excluding the “Safety Torque Off” input when used in compliance
with the standards) on Heosone is not sufficient in critical applications without adopting additional independent
measures to ensure safety. For all applications in which malfunctioning may cause serious damage to people and
things, the risks must be assessed and additional protection measures adopted.
Ensure a correct earth connection and only use cables specified by local regulations in force.
The Heosone controller typically has leakage current less than 1 mA.
Ensure compliance with all national and local laws and regulations regarding the safety of low voltage equipment
installations, as well as the requirements for correct use of tools and personal protective equipment.
Only use this device for the purposes specified by the manufacturer. Do not modify or replace the components unless
recommended by the manufacturer, as this may cause fire, electric shock or other damage.