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Typical Connection to the 3M™ Macurco™ Detection and Ventilation Control Panel
Gas detection and exhaust fan control is provided by a 3M™ Macurco™
All power and signal connections for the transducers are provided from the
NOTE:
1. Power connections at the sensor are
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Power Up
WWARNING
Each time the unit is turned on it performs a
The 3M™ Macurco™
Exhaust Fans
120VAC
ALARM
120VAC
Power
Main Fan Power
coil
coil
STARTER RELAYS
120VAC COILS
8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
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24 V RET | +1 LOOP | +24 VDC | 24 V RET | +1 LOOP | +24 VDC |
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| - Strobe | 4 |
3M™ MACURCO™ |
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| + Strobe | 3 | |||
DETECTION AND VENTILATION |
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CONTROL PANEL |
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| Relay 2 | Relay 3 |
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Panel Power
Gnd 120/250VAC
N | L | N.C. | N.O. | COM | N.C. | N.O. | COM | N.C. | N.O. | COM |
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1 | 3 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
the light will turn solid green.
WWARNING
Do not cover or obstruct visual alarm LED. Doing so may adversely affect product performance and result in sickness or death.
Operation
1.With the display function turned “On”, the 3M™ Macurco™
2.With the display function turned “On” and the gas concentration reaching the alarm relay setting, (20% LEL, for example) the display will flash back and forth between “ALr” and “20”. The buzzer will sound indicating “Alarm” if the buzzer is turned “On”. With the display function turned off the display does not show the gas concentration, but will show “ALr” when the Alarm relay is activated.
3.With the
Default Configuration – Factory Settings
•The default Display setting is Off
•The default Power Up Test setting is On
•The default Buzzer setting is Off
•The default Alarm Relay setting is activation at 20% LEL
•The default Fan Relay Delay setting is 3 minutes
•The default Fan Minimum Runtime setting is OFF
•The default Fan Relay setting is activation at 10% LEL
•The default Alarm Relay Configuration is Normally Open
•The default
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