Installation And Operating Instructions; Mounting Holes - Macurco DVP-120B User Instructions

3 Installation and Operating Instructions

Gas detection and exhaust fan control are provided by a 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 DVP-120B also includes
the RS-485 serial interface from the DVP-120B to the MRS-485 and remote detectors. Power to the MRS-485 and detectors is provided
by isolated/remote low voltage power supply.
The system is configured 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.
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 serious injury or death. For proper use, see supervisor or User Instructions, or call Macurco Technical Service at 1-844-325-
3050.
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, etc.) 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-120B 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.
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 serious injury or death.

3.1 Mounting Holes

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 3-1. The panel should be mounted with sufficient space around the
panel for access to Conduit entry holes provided on the top, bottom and right side of the panel.
WARNING
WARNING
Figure 3-1 Mounting Holes
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