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12 | WECM / Emerald eZA Manual
6.6.
FIRE MODE FUNCTION (OPTIONAL)
DANGER!
Notice that the WECM / Emerald eZA is just one of the components of the ventilation system, and it is configurable
for different functions, including the “Fire Mode” function;
Thus, the full operation of the “Fire Mode” function depends on the accuracy of the project and on the joint performance
of the components of the system;
Ventilation systems that work on life safety applications must be approved by the Fire Department and/or another
competent public authority;
The non-interruption of the operation of the WECM / Emerald eZA, when configured for operation in the “Fire Mode”
function, is critical and must be taken into account in the preparation of safety plans in the environments in which they
are installed, since damages may occur to the WECM / Emerald eZA itself and to other components of the ventilation
system, to the environment in which it is installed and to people with risk of death;
The operation in the “Fire Mode” function may, under certain circumstances, result in fire, since the protection devices
will be disabled;
Only personnel from engineering and safety must consider the configuration of the equipment for the “Fire Mode”
function;
WEG strongly recommends to follow the cares and procedures above before using the WECM / Emerald eZA in the
“Fire Mode” function, and it will not be liable to the final user or third parties for any losses or damages direct or indirectly
incurred due to the programming and operation of the WECM / Emerald eZA in “Fire Mode” regime, considering the
critical and special use of this function.
NOTE!
When the user activates the "Fire Mode" function, he/she acknowledges that the protection functions of the
WECM / Emerald eZA are disabled, which may result in damages to the WECM / Emerald eZA itself, to the
components connected to it, to the environment in which it is installed and to people present in such environment;
therefore, the user takes full responsibility for the risks arising from such operating condition. Operation with the “Fire
Mode” function programmed voids the warranty of the product. The operation in this condition is internally registered by
the WECM / Emerald eZA and must be validated by a duly qualified professional of engineering and occupational safety,
since such procedure significantly increases the operating risk.
The “Fire Mode” function is intended to make the WECM / Emerald eZA continue work under adverse conditions, inhibiting
most faults generated by the electronic in order to protect itself or protect the motor.
The “Fire Mode” is selected by applying 10VDC to the frequency input. The built-in 10 VDC source can be used. When
selected, the motor will speed up to the maximum speed set and will disable all motor software protections.
The only possible way to turn off the “Fire Mode” operation function is to de-energize the complete solution and energize
it back again.
6.7. SERIAL COMMUNICATION
6.7.1. Hardware preparation:
USB to 485 Converter
Setting:
Step 1: Install the driver of USB to 485 Converter on PC.
Step 2: Connect converter with ECM Motor:
Connect A pin of USB to 485 Converter with 485+ signal of ECM Motor.
Connect B pin of USB to 485 Converter with 485- signal of ECM Motor.
Connect GND of USB to 485 Converter with GND signal of ECM Motor.
