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VOC-3 : Leak Detector Bulletin VOC-3 December 2011

GROUP A1 REFRIGERANT LEAK DETECTOR WITH TWO CONTACT LEVELS

Features: Two contacts for warning Fully electronic system and energization at with temperature the LOW or HIGH compensation and a long refrigerant leak levels. life , calibrated to the specific refrigerant Rugged dust and required. corrosion resistant PVC enclosure with visible Suitable for the control of status indicators on the emergency ventilation front cover. systems for personnel protection. Provides early warning of refrigerant leaks in and mechanical rooms.

With increasing awareness 1) Ambient air monitors for The ACME VOC-3 is a reliable concerning the hazards of Group A1 in and economical solution to leaks, consultants, machinery rooms. ASHRAE 15 compliance. contractors and building owners have moved to install refrigerant 2) An alarm to alert persons The VOC-3 contains all the leak detection equipment in new inside and outside of the features for which ACME's other and existing chiller rooms. The machinery room that a leak CO detectors have become ACME VOC-3 Refrigerant Leak has occurred resulting in high known: a rugged enclosure, top Detector is designed to detect refrigerant ambient levels. quality electronics and Group A1 refrigerants, used in automatic sensor the majority of chiller equipment 3) Route relief valves discharge decontamination. installations. ASHRAE has also headers and purge units moved to impose a standard for outdoors, away from air For selected detection refrigerant leak monitoring. intakes. options, please see the reverse of this bulletin. For descriptions Some requirements of the 4) Install local exhaust to of other available ACME ASHRAE Standard 15 "Safety ventilate the workplace in the detection and control units, Code for Mechanical event that the air monitor consult ACME or your local Refrigeration" are: alarm level is exceeded. representative.

1 VOC-3 : Refrigerant Leak Technical Data: detected: CFC or HCFC R-11, R-12, R-22 R-62, R-113, R-502, R140a Principle of Operation R-134a & The ACME VOC-3 (Group A1) Ambient Sensor: N-type metal oxide Refrigerant monitor is designed to signal a Mounting: Wall or column with brackets (supplied) refrigerant gas presence in the space air Unit dimensions: 152mmH x 152mmW x 101mmD when the leak reaches the "LOW LEVEL" - (6”H x 6”W x 4”D) TLV setpoint (currently 1000 PPM). This level should alert the operating personnel and any Supply voltage: 120V AC (Also available 24 or 220V AC) supervisory system. It is not recommended to 50-60 Hz, 20VA start the ventilation system at this level as this Ambient Temp.: 10-40°C (50-100°F) will make it more difficult to locate the source Dry control contacts: 2 of the leak. When the refrigerant reaches the Contact rating: 3A 120V AC 1PH "HIGH LEVEL" setpoint 2xTLV (currently Contact relay 1: Low Level leak (1000 PPM std.) 2000 PPM), the VOC-3 signals a second Contact relay 2: High Level leak (2000 PPM std.) alarm. At this point the ventilation should be LED indicators: Power On, Low Level, High Level started to reduce build-up in the room. Buzzer Spec: 75db@10 ft The ACME VOC-3 uses a gas Options: Pneumatic sampling : sensor designed to detect volatile organic Cat. No.: VOC-3-EN compounds. The decrease of electrical resistance of the sensor as it gets exposed to Additionnal Volatile Organic Compounds Model No.: VOC-2 gases or vapors is used as an electrical output signal for detection. Because of possibly long 2 fixed contact levels at LOW and HIGH of the specific VOC. storage time before it is initially energized, Consult factory for alternate contact levels. allow one week for unit to reach optimum Wall mounted enclosure. Same dimensions as above. operating conditions. If the unit was de- energized for a couple of days, the time required to have the unit back in normal operation is only of a few minutes.

The ACME VOC-3 unit is packaged in a Typical Wiring Diagram gasketed enclosure, suitable for wall mounting. There are no knobs or buttons 1000 PPM 2000 PPM accessible from the outside. VOC-3 LOW LEVEL HIGH LEVEL Typical specifications Supply, install and connect at locations 1 2 3 4 5 6 shown on drawings ACME VOC-3 (Group L N A1) Ambient Refrigerant Detection and SPDT RELAY OUTPUT Control Units. Units shall be fully electronic 120V AC CONTACT incorporating solid state circuitry with built-in 50/60 Hz RATING: 3A @ 120V AC temperature compensation, factory 20VA calibrated at LOW and HIGH levels. Provide SPDT control relay contacts for each level. Each unit shall include visual indication for Power “ON” and operating status. HIGH level shall activate an integral audible alarm. Unit enclosure shall be gasketed and made of corrosion resistant material. Power supply shall be 120V AC unless specified.

In the U.S.A. In Canada Represented by: ACME ENGINEERING PROD. INC. ACME ENGINEERING PROD. LTD. Trimex Ind. Bldg., PMB #10 5706 Royalmount Ave., 2330 State Route 11 Montreal, Quebec Mooers, N.Y. 12958 H4P 1K5 Tel. : (518) 236-5659 Tel. : (514) 342-5656 Fax : (518) 236-6941 Fax : (514) 342-3131 E-mail : [email protected] - Internet : www.acmeprod.com

The information provided by this bulletin is a general description of ACME UNITS. All specifications are subject to change without notice. 2 Installation, maintenance and other instructions provided with the equipment shall be closely followed by installers, owners and users.