Mounting The Dvp-120; General Wiring Information - Macurco DVP-120 User Instructions

! WARNING
This equipment helps monitor for the presence and concentration level of certain specified 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 result in sickness or
death. For proper use, see supervisor or User Instructions, or call Macurco Technical Service.
This DVP-120 system should be used with 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.
For DVP-120M Modbus applications use shielded 3-conductor wire with one twisted pair providing a pair for signal (A & B), common
(COM) and shield ground (SHD) connections. 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 240 VAC.
Main power wiring should conform to national and local electrical codes, and may require separate inspections and certification.
Contact your local building authority for further details.
! WARNING
DVP-120 may not function effectively below 32°F (0°C) or above 104°F (40°C). Using the equipment outside of this temperature range 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. See figure 2-1. 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.
Figure 2-1 Mounting holes
Typical coverage for CO, CO2 and NO2 sensors is 5,000 sq. ft. (464.5 sq. m), 900 sq. ft. (83.6 sq. m) for combustibles and other
toxic gases (see the User Instructions of each sensor type for location and coverage details). Extra sensors may be needed near
areas where people work, such as toll booths. Macurco provides only the control panels and sensors. Fans, relays, and other
devices are provided by the contractor. See the appropriate building code for the size of fans and air changes per unit of time.
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