Specifications

6
1.5 Return information
FOR MORE INFORMATION
In United States, contact:
Website: www.3M.com/OccSafety
Technical Assistance: 1-800-237-9049
For other 3M products:
1-800-3M-HELPS or 1-651-737-6501
3M Occupational Health and
Environmental Safety Division
3M Center, Building 0235-02-W-70
St. Paul, MN 55144-1000
2 INSTALLATION & CONNECTION
Gas detection and exhaust fan control is provided by a 3M™ Macurco™ DVP-120 System. System wiring includes the main power connection for the DVP-120, 4-20mA current loop
and 24VDC power connections between the remote sensors and the DVP-120, the fan control connections and/or alarm connections from the DVP-120 to the building ventilation and
automation systems. The system configuration is entered by the user through the LCD display and keypad. The system display provides the user with the system status, and the status of
each configured sensor. In addition, all control functions of the DVP-120 may be accessed through the system display and keypad.
W WARNING
Thisequipmenthelpsmonitorforthepresenceandconcentrationlevelofcertainspeciedairbornegases.Misusemayproduceaninaccuratereading,whichmeansthathigherlevels
of the gas being monitored may be present and could result in overexposure and cause sickness or death. For proper use, see supervisor or User Instructions, or call 3M in U.S.A.,
1-800-243-4630. In Canada, call Technical Service at 1-800-267-4414.
Thissystemshouldbeusedwith3M™Macurco™Transducersandeachunitwillmeasurethelevelofthetargetgas(i.e.CO,NO2,EX)andprovidethisinformationtotheDVP-120over
a 4-20mA current loop. The transducers operate on low voltage (24VDC). All power and signal connections for the transducers are provided from the DVP-120 control panel, via unshielded
four conductor cable. The DVP-120 control panel provides three relays which can be used for ventilation fan control or alarm signaling. These relays (SPDT - Form C) are for pilot duty only,
capableofswitching10amploadsupto240VAC.Mainpowerwiringshouldconformtonationalandlocalelectricalcodes,andmayrequireseparateinspectionsandcertication.Contact
your local building authority for further details.
W WARNING
DVP-120maynotfunctioneffectivelybelow32°F(0°C).Usingtheinstrumentbelowthistemperaturemayadverselyaffectproductperformanceandresult in sickness or death.
2.1 Mounting the DVP-120
Mounting holes are provided in the DVP-120 case at the four corners. The top two are keyhole shaped so that the panel can be hung and then the two bottom screws driven to hold the
panel. The panel should be mounted with sufficient space all around for access to Conduit entry holes provided on the top, bottom and right side of the panel.
Typical connection to the 3M™ Macurco™ DVP-120 Control Panel
Gas detection and exhaust fan control is provided by a 3M™ Macurco™ DVP-120 system. This system will use 3M™ Macurco™ Carbon Monoxide, Nitrogen Dioxide or Combustible Gas
transducers. Each transducer will measure the level of the target gas and provide this information to the DVP-120 over a 4-20mA current loop. The transducers operate on low voltage
(24VDC).
All power and signal connections for the transducers are provided from the DVP-120 control panel via unshielded four conductor cable. The DVP-120 control panel provides three relays
which can be used for ventilation, fan control or alarm signaling. These relays (SPDT-Form C) are for pilot duty only, capable of switching 10 amps loads up to 240VAC.
Note:
1. Power connections at the sensor are non-polarized.
TRANSDUCER
Main Fan Power
120VAC
ALARM
120VAC
Power
Exhaust Fans
coil
coil
power output
TRANSDUCER
– +
power output
– +
8 7 6 5 4
4
3
3
2
2
1
1
1 13 3 4 5 6 7 8 92
24 V RET
N.C. N.C. N.C. N.O. N.O. N.O.
COM COM COM
-1 LOOP
+1 LOOP
+24 VDC
-1 LOOP
+1 LOOP
+24 VDC
- Strobe
+ Strobe
- Horn
+ Horn
Relay 1
Gnd
Panel Power
120/250 VAC
3M™ MACURCO™ DVP-120 GAS
DETECTION AND VENTILATION
CONTROL PANEL
STARTER RELAYS
120VAC COILS
Relay 2 Relay 3
24 V RET
LN