Macurco TX-6-ND User Manual

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TABLE OF CONTENTS GENERAL SAFETY INFORMATION 3

Intended Use 3 List of Warnings and Cautions 3 USE INSTRUCTIONS AND LIMITATIONS 4 Use For 4 Do Not Use For 4 General Description 4

Features 4

Specifications 5 INSTALLATION AND OPERATING INSTRUCTIONS 5

Location 6

Installation 6

Garage diagram 6

4-20 mA Output diagram 6 Multiple Device diagram 7 Alarm Control Panel diagram 7

DVP-120 Control Panel diagram 8

Alternate Alarm Panel 8 Power Up 8 Operation 9 Default – Factory Settings 9

Display setting 10

Buzzer setting 10

Alarm Relay setting 10

Alarm Relay Configuration 10

Fan Relay setting 10

Fan Relay Delay setting 10

Fan Minimum Runtime setting 11

Fan Relay Latching setting 11

4-20mA Output setting 11 On Board Diagnostics 11 Sensor Poisons 12

MAINTENANCE 12

End-of-Warranty Signal 12

Sensor Replacement 12

Sensor Life Reset 13 Cleaning 13 Testing 13

Operation Test 13

Nitrogen Dioxide Test 15

Field Calibration Procedure 17 MACURCO GAS DETECTION PRODUCTS WARRANTY 18

GENERAL SAFETY INFORMATION Intended Use

The Macurco TX-6-ND is a low voltage, dual relay Toxic Gas (TX) detector, controller and transducer for Nitrogen Dioxide (NO2). The TX-6-ND has selectable 4-20 mA output, buzzer and digital display options. It is an electronic detection system used to measure the concentration of Nitrogen Dioxide and provide feedback and automatic exhaust fan control to help reduce Nitrogen Dioxide concentrations in parking garages, maintenance facilities or other commercial applications. The TX-6-ND is a low level meter capable of detecting from 0-20ppm of Nitrogen Dioxide. The TX-6-ND is factory calibrated and 100% tested for proper operation, but can also be calibrated in the field.

List of Warnings and Cautions within these User Instructions

! WARNING

 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.

 Use only for monitoring the gas which the sensor and instrument are designed to monitor. Failure to do

so may result in exposures to gases not detectable and cause sickness or death. For proper use, see supervisor or User Instructions, or call Technical Service at 1-877-367-7891.

 This equipment may not function effectively below 0F or above 125F (-18C or above 52C). Using the

detector outside of this temperature range may adversely affect product performance and result in sickness or death.

 This detector helps monitor for the presence and concentration level of a certain specified airborne gas.

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 Technical Service at 1-877-367-7891.

 High voltage relay terminals (120/240 VAC) are located within this detector, presenting a hazard to

service technicians. Only qualified technicians should open the detector case and service the internal circuits. Ensure power is removed from the detector relays prior to servicing the unit. Failure to do so

may 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 impair product performance and result in sickness or death.

 Using a certified gas with a concentration other than the one listed for this detector when conducting a

calibration or calibration verification test (bump test) will produce inaccurate readings. This 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 Technical Service at 1877-367-7891

 The following steps must be performed when conducting a calibration or calibration verification test

(bump test) to ensure proper performance of the monitor. Failure to do so may adversely affect product performance and result in sickness or death.

 When performing a calibration or calibration verification test (bump test) only use certified

calibration gas at the required concentration level. Do not calibrate with expired calibration gas.

 If the instrument cannot be calibrated, do not use until the reason can be determined and

corrected.

 Do not cover or obstruct display or visual alarm  Ensure sensor inlets are unobstructed and is free of debris

USE INSTRUCTIONS AND LIMITATIONS

! WARNING

Each person using this equipment must read a nd understand the information in these U ser 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.

Use For

The TX-6-ND provides Nitrogen Dioxide detection and automatic exhaust fan control for parking garages, loading docks, truck and bus depots, firehouses, ambulance bays, warehouses and maintenance facilities. Nitrogen dioxide or NO2 is a toxic chemical of concern in diesel exhaust. The higher average temperature of combustion of diesel engines generates more nitrogen oxides than gasoline engines. The TX-6-ND meets the requirements of the Uniform Building Code for enclosed garages and meets OSHA standards for Nitrogen Dioxide exposure. TX-6-ND can be used stand alone, with the Macurco DVP-120 Detection and Ventilation Control Panel, other 12 VAC or 24 VDC fire/security panels or building automation systems.

! WARNING

Use only for monitoring the gas which the sensor and instrument are designed to monitor. Failure to do so may result in exposures to gases not detectable and cause sickness or death. For proper use, se e supervisor or User Instructions, or call Technical Service at 1-877-367-7891.

Do Not Use For

The TX-6-ND is not intended for use in hazardous locations or industrial applications such as refineries, chemical plants, etc. Do not mount the TX-6-ND where the normal ambient temperature is below 0°F or exceeds 125°F (below -18C or above 52C). The TX-6-ND mounts on a 4x4 electrical box supplied by the contractor. Do not install the TX-6-ND inside another box unless it has good air flow through it.

! WARNING

This equipment may not function effectively below 0F or above 125F (-18C or above 52C). Using the detector outside of this temperature range may adversely affect product performance and result in sickness or death.

General Description

The TX-6-ND is a low voltage, dual relay Nitrogen Dioxide (ND) detector and automatic ventilation controller. The TX-6-ND uses a microcomputer controlled, electronic system to measure the concentration of Nitrogen Dioxide, actuate relays and provide a 4-20mA output. The TX-6-ND has a field replaceable, electrochemical sensor (expected life of 2+ years) and optional gas test and calibration kits. The TX-6-ND is a low level meter capable of displaying from 0-20ppm of Nitrogen Dioxide.

Features

 ETL Listed to UL 61010-1  Low level meter capable of displaying from 0-20 ppm Nitrogen Dioxide  The TX-6-ND meets Uniform Building Code for enclosed garages and OSHA standards for gas

exposure

 Selectable fan and alarm relay activation  5 A SPDT fan relay controls starters of exhaust fans  0.5 A N.O. or N.C. alarm relay connects to warning devices or control panels  4-20 mA Current Loop  TX-6-ND mounts on a standard 4x4 electrical box and becomes cover for the box  Supervised system: any internal detector problem will cause the fan & alarm relay to activate  Calibration kit is available. One screw allows access for calibration or gas test

Specifications

 Power: 3 W (max) from 12 to 24 VAC or 12 to 32 VDC  Current @ 24 VDC: 75 mA in alarm (two relays), 50 mA (fan relay only) and 23 mA stand by  Shipping Weight: 1 pound (0.45 kg)  Size: 4 1/2 x 4 x 2 1/8 in. (11.4 X 10.2 X 5.4 cm)  Color: Dark gray  Connections: plugs/terminals  Mounting box: (not included) 4x4 electric  Fan relay: 5 A, 240 VAC, pilot duty, SPDT  Fan relay actuation: selectable at OFF, 0.2, 0.5, 0.7, 1.0, 1.2, 1.5, 1.7, 2.0, 2.2, 2.5 (default), 2.7,

3.0, 3.2, 3.5, 3.7, 4.0, 4.2, 4.5, 4.7, 5.0 ppm

 Fan Delay Settings of 0, 1, 3 (default), 5 and 10 minutes  Fan Minimum Run Time settings are OFF (default), 3, 5, 10 or 15 minutes  Fan relay latching or not latching (default) selectable  Alarm relay: 0.5A 120 V, 60 VA  Alarm relay actuation: selectable N.O. (default) or N.C.  Alarm relay settings: OFF, 1, 2, 3, 4, 5 (default), 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

ppm

 Current Loop: 4-20 mA for 0-20ppm NO2, selectable to off (default) or on  Buzzer: 85 dBA at 10cm settable to off (default) or on  Digital display: 3 digit LED selectable to off (default) or on.  Operating environ: 0°F to 125°F (-18C to 52C).10 to 90% RH

INSTALLATION AND OPERATING INSTRUCTIONS

The following instructions are intended to serve as a guideline for the use of the Macurco TX-6-ND Nitrogen Dioxide Detector. It is not to be considered all-inclusive, nor is it intended to replace the policy and procedures for each facility. If you have any doubts about the applicability of the equipment to your situation, consult an industrial hygienist or call Technical Service at 1-877-367-7891.

! WARNING

This detector helps monitor for the presence an d concentrati on level of a certain spe cified airborne gas. Misuse may produce an inaccurate reading, which m eans that h igher le vels of the gas being monit ored may be present and coul d result in overexposure and cause sickness or death. For pr oper use, see supervisor or User Instructions, or call Technical Service at 1-877-367-7891.

Location A TX-6-ND is normally mounted at breathing level, about 5 feet (1.5 meters) above the floor on a wall or

column in a central area where air movement is generally good. The unit, on average, can cover about 5,000 sq. ft. (465 sq. meters). The coverage depends on air movement within the room or facility. Extra detectors may be needed near any areas where people work or where the air is stagnant. Do NOT mount the TX-6-ND where the normal ambient temperature is below below 0°F or exceeds 125°F (below -18C or above 52C).

! WARNING

High voltage relay terminals (120/240 VAC) are located within this detector, presenting a hazard to service technicians. Only qualified technicians should open the detector case and service the internal circuits. Ensure power is removed from the detector relays prior to servicing th e unit. Failure to do so may result in sickness or death.

Installation

1. The TX-6-ND mounts on a 4” square (or 4x4) electrical box supplied by the contractor. Do not mount the TX-6-ND inside another box, unless it has good air flow through it.

2. Connect the TX-6-ND to Class 2 power supply only. It is suggested to use a separate transformer for powering the unit or units because of possible interference’s from other devices on the same power supply.

3. Connect the TX-6-ND to the control cables with terminal plugs. When making connections, make sure the power is off.

4. There are two terminals for Power: 12 to 24 VAC or 12 to 32 VDC, with no polarity preference.

5. There are two terminals for the dry alarm relay contacts, again with no polarity preference. The alarm relay can switch up to 0.5 A 120 V, or 60 VA. The alarm relay is activated if gas reaches or exceeds the alarm settings. See OPERATION section of these User Instructions for details on relay settings.

6. The alarm relay can be configured to normally open (default) (N.O.) or normally closed (N.C.) and will activate if the gas concentration exceeds alarm set point. It will deactivate once the gas concentration drops below the alarm set point. Note that the “disable” setting will cause the alarm relay not to engage at all.

7. The dry contact, SPDT fan relay has three terminals. The common (COM.), normally open (N.O.) and the normally closed (N.C.) contact. The fan relay can switch up to 5.0 A up to 240 VAC. See OPERATION section of these User Instructions for details on relay settings.

8. The Fan Relay can be configured for latching or non-latching (default) when activated (when the gas concentration exceeds fan relay set point).

9. The Fan Relay will engage if the fan setting Nitrogen Dioxide concentration is exceeded for longer than the Fan Relay Delay time. Unless it is configured for latching, the fan relay will disengage once both of these conditions have been met:

 Nitrogen Dioxide concentration has dropped below fan setting  Fan Relay Run time has been exceeded

Note that the “disable” fan setting will cause the fan relay to not engage. The fan relay will engage in trouble fault condition and will disengage once trouble fault condition is cleared.

10. The Current Loop is 4 mA in clean air and 20 mA for 20 ppm Nitrogen Dioxide

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