Standard Shelter
Cod. +030221471 – Rel. 2.0 – April 01, 2003
12
8 HEATERS
The heaters are managed as simple ON-OFF loads. Normally up to 2 heaters with the same power can be managed, connected to the 2 outputs.
“Binary management” allows the use of three heating steps with just two outputs. Consequently, there are two possible options:
• management of 2 loads with different power values;
• management of 3 loads. To use this system, a recognizer is required (NOT supplied), which, connected to the outputs, reads the logic
and activates the loads.
The outputs behave as follows:
CODE 2 DIFFERENT LOADS 3 LOADS
STEP 1 Relay 1=On Relay 2=Off 10 Heat.1=On / Heat.2=Off Heat.1=On / Heat.2=Off / Heat.3=Off
STEP 2 Relay 1=Off Relay 2=On 01 Heat.1=Off / Heat.2=On Heat.1=On / Heat.2=On / Heat.3=Off
STEP 3 Relay 1=On Relay 2=On 11 Heat.1=On / Heat.2=On Heat.1=On / Heat.2=On / Heat.3=On
The outputs are activated with a slight delay from one to the other, to avoid simultaneous peaks.
8.1 HEATER ALARMS
Each heater features a digital input to be connected to a thermal cutout or circuit breaker for signalling any anomalies.
If one of the inputs is not used, it must be closed electrically on the 24Vac power supply.
The alarm is immediate and is generated when the digital input switches from closed to open; the heater is immediately switched off. Reset is
manual, that is, the user must press the Alarm button on the terminal to be able to restart the heaters, as long as the thermal cutout - circuit
breaker has been reset by closing the digital input.
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