Introduction; General Information; Dvp-120M Addressable Detection And Ventilation Control Panel; Macurco Mrs-485 Modbus Adapter - Macurco DVP-120 User Instructions

LIST OF WARNINGS

Each person using this equipment must read and understand the information in these User Instructions before use. Use of this equipment by
untrained or unqualified persons, or use that is not in accordance with these User Instructions, may adversely affect product performance and
result in sickness or death.

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.

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.

High voltage terminals (120/240 VAC) are located within the DVP-120, presenting a hazard to service technicians. Only qualified technicians
should open the DVP-120 case and service the internal circuits. Ensure power is removed from the DVP-120 prior to servicing the unit.

Immediately exit any environment that causes an alarm condition on the sensor. Failure to do so may result in sickness or death.

Each time the unit is turned on it performs a self-test, which activates the audible and visual alarms. If the self-test fails, or all the alarms do not
activate, do not use. Failure to do so may adversely affect product performance and result in sickness or death.

Do not cover or obstruct audible alarm opening or visual alarm LED. Doing so may adversely affect product performance and result in
sickness or death.

Do not disassemble unit or attempt to repair or modify any component of this instrument. This instrument contains no user serviceable parts,
and substitution of components may adversely affect product performance and result in sickness or death.

Use only for monitoring the gases which the sensors and equipment are designed to monitor. Failure to do so may result in exposures to gases
not detectable and result in sickness or death. For proper use, see supervisor or User Instructions, or call Macurco Technical Service.

1. Introduction

1.1

General Information

The DVP-120 exhaust fan controller, in conjunction with Macurco™ gas transducers, provides automatic controls to help maintain an
acceptable environment in parking garages or other facilities. The DVP-120 system is designed to meet specifications for safety in
enclosed parking garages, including the Uniform Building Code and OSHA 50ppm CO requirements. The DVP-120 can control up to
twelve gas sensors in any combination (i.e. CO, NO2, EX). The DVP-120 is ready for operation after the wiring is complete and the
user system configuration is entered.
1.2

DVP-120M Addressable Detection and Ventilation Control Panel

The DVP-120M is a Modbus-Enabled Detection and Ventilation Panel with up to 87 Modbus addressable sensors on three channels of
29 sensors per channel, plus the original 12 analog 4-20mA sensor channels. The DVP-485 Modbus adapter increases the capacity of
the DVP-120 from 12 detectors to 99. System wiring includes 4-20mA current loop and RS-485 serial interface. System wiring includes
main power connection for the DVP-120M, the fan control and alarm connections from the DVP-120M to the building ventilation and
automation systems. The RS-485 serial interface is from the DVP-120M to the remote detectors. Power to the detectors is provided by
isolated/remote low voltage power supply.
1.3 Macurco MRS-485 Adapter
The Macurco MRS-485 adapter is an accessory used to convert the 4-20mA analog signal from Macurco 6-Series type detectors to a
digital signal for use with the DVP-120M and other multipoint addressable systems. The Macurco MRS-485 simply plugs into the back
of the detector and a single screw fastens it in place. The MRS-485 accepts the 4-20mA output and is powered from the same
connection as the detector. The MRS-485 is not intended for use in hazardous locations or industrial applications such as refineries,
chemical plants, etc. Do not mount the MRS-485 where the normal ambient temperature is below 0°F or exceeds 125°F (-18°C or
above 52°C). The MRS-485 mounts to a Macurco 6-Series detector installed on a 4" x 4" electrical box electrical box supplied by the
contractor.
Each person using this equipment must read and understand the information in these User Instructions before use. Use of this equipment by
untrained or unqualified persons, or use that is not in accordance with these User Instructions, may adversely affect product performance and result
in sickness or death.
! WARNING
! WARNING
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