Macurco RD-12 Instructions D'utilisation page 9

6. The Fan Relay will engage if the fan setting refrigerant gas concentration is exceeded for longer than the Fan Relay Delay time.
Unless it is configured for latching, the fan relay will disengage once both of these conditions have been met:
•
Refrigerant gas concentration has dropped below fan setting
•
Fan Relay Run time has been exceeded
Note that the "disable" fan setting will cause the fan relay to not engage. The fan relay will engage in trouble fault condition (if
the Trouble Fan Setting Option is set to "ON") and will disengage once trouble fault condition is cleared.
The Current Loop is 4 mA in clean air and 4-20 mA for 0-1,000 ppm refrigerant gas
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