Gas Pressure Switch for DMV safety shutoff valves GAO-A GMH-A GML-A UL Listed UL File # MH 668 CSA Certified CSA C. No. LR File # 07 FM Approved Class 0, 0 File # J.I. Y9A9.AF Commonwealth of Massachusetts Approved Product Approval code G-006-9 Gas pressure switch Codes and Standards This product is intended for installations covered by but t limited to NFPA 8, NFPA 86, UL 79, CSD-, ANSI Z8., ANSI Z8.8, ANSI Z., and CSA B9.. Gxx_A Sales Brochure P/N 6 9 Edi 0/08 DUNGS is an ISO 900 manufacturing facility. Description The GAO-, GMH-, and GML-A pressure switches are compact, ventless gas pressure switches for modular valve train components. A pressure switches are suitable for making and/or breaking a circuit when the medium pressure changes relative to the set point. The set point can be set in the field by an adjustable dial with an integrated scale. The switches incorporate a vent limiter as per UL and limits the escape of gas less than.0 CFH of natural gas at 7 PSI if internal switch diaphragm ruptures. Application The GAO-, GMH-, and GML-A pressure switches are recommended for industrial and commercial heating applications with DMV dual modular valves, SV safety valves, MBC multifunctional controls, and FRI modular pressure regulators. Various mounting options allow direct mounting on the housing. The GAO-, GMH-, and GML-A pressure switch is suitable for natural gas, propane, butane, air and other inert gases. Suitable for up to 0.% by volume, dry H S. 6
GAO-A SPDT pressure switch requires auxiliary power to actuate. The GAO-A is suitable for making and/or breaking a circuit when the set point is exceeded or undershot. A tripped switch is indicated by a neon light after set point is exceeded or undershot. Automatic reset when pressure returns below or above set point. GMH-A SPDT pressure switch requires auxiliary power to actuate. The GMH-A is suitable for making and/or breaking a circuit when the set point is exceeded. A tripped switch is indicated by a neon light after set point is exceeded. Manual reset is required to reset the switch. GML-A SPDT pressure switch requires auxiliary power to actuate. The GML-A is suitable for making and/or breaking a circuit when the set point is undershot. A tripped switch is indicated by a neon light after set point is undershot. Manual reset is required to reset the switch. Specifications Max. operating pressure GAO-A,,,6 GMH- and GML-A,6 GAO-, GMH- and GML-A8 7 PSI (00mbar) 7 PSI (00mbar) PSI (000 mbar) Pressure connection O ring flange connection on underside of pressure switch Temperature range: For series ending in -,-,-, and -6 For series ending in -8 Materials Electrical ratings Nominal current Ambient temperature Medium temperature Ambient temperature Medium temperature Housing Switch Diaphragm Switching contact AC eff. DC Silver (Ag) contact ratings AC 0A resistive @ 0 VAC AC 8A inductive @ 0 VAC DC min. 0mA @ VDC DC max. A @ VDC -0 F to +0 F (-0 C to +60 C) -0 F to +0 F (-0 C to +60 C) - F to +0 F (-0 C to +60 C) - F to +0 F (-0 C to +60 C) Aluminium Polycarbonate NBR-based rubber Silver or Gold min. V max. 0 V min. V max. 8 V Gold (Au) contact ratings DC max. ma @ VDC DC max. 0mA @ VDC Electrical connection Enclosure rating Setting tolerance Vent Limiter GAO (Shown as a high gas limit) As pressure rises above set point, NC opens, NO closes, Neon light ON (fault). As pressure falls below setpoint, switch resets: NC closes and NO opens. Screw terminals via / NPT conduit connection NEMA Type ±% switching point deviation referred to set point. Adjusted as pressure rises or as pressure falls, vertical diaphragm position. Incorporates a vent limiter as per UL and limits the escape of gas less than.0 CFH of natural gas at 7 PSI if internal switch diaphragm ruptures. GMH (Operating state shown) As pressure rises, NO closes, NC opens, and Neon light ON (fault), switch trips and locks out. GML (Operating state shown) As pressure falls, NO opens, NC closes, Neon light ON (fault), switch trips and locks out. 6
Dimensions inch (mm) GAO-, GMH-, GML-A Slot for O-ring Adapters / replacement parts / Accessories Order No. For equipment Notes A kit (included with switch) 6-88 M Screws, 0. x. O-ring DMV & MBC Port adapter (side mount for high pressure switch) -97 DMV-D(LE) 70-70 MBC series 000-000 NPT / - NPT Replacement conduit adapter 0-67 Pg to / NPT adapter Replacement conduit adapter 0-66 M0 to / NPT adapter Replacement cover 8-7 GAO Replacement cover - GMH, GML Screw for replacement cover 7-67 Replacement light -6 0 VAC, yellow bulb Replacement light 8-0 0 VAC, green bulb Replacement light Male plug for A (use with 0-8 female connector) -7 9-69 Gold contact versions GAO VDC/VAC, yellow bulb Male plug for A (use with 0-8 female connector) 7-6 GMH, GML DIN Connector (female plug) for A (For use with 9-69 or 7-6) 0-8 Definition of switching hysteresis p The pressure difference between the upper and lower switching pressures 6
A mounting options FRI gas pressure regulator M o u n t i n g A mounting options DMV 70-70 Dual modular valve, with # -97, horizontal, vertical with #-07, horizontal, vertical with #-07 A mounting options DMV,00-/Dual modular valve Pressure 6 6
0 6 8 0 6 8 A mounting options MBC series multifunctional control MBC ports, with # -97, horizontal, vertical with #-07 p Br p Br, horizontal, vertical with #-07 A mounting options SV 00 and SV 007 series safety valve SV 00 and SV 007 Series ports (pressure switch only mounts to upstream port #) A mounting options SV 00, SV 0, SV 0, and SV 00 series safety valve 6
Gas Pressure Switch for DMV safety shutoff valves GAO-A GMH-A GML-A Type GAO-A pressure switch Version GAO-A GAO-A GAO-A GAO-A6 GAO-A8 Order No. 7-08A 7-086A 7-087A 7-088A 7-089A Setting range in. W.C. 0.6 -.0 0.0 -.00.00-0.00.0-60.0 0.00-00.0 Switching hysteresis in. W.C. 0. 0.0 0.0..0 Factory Calibration GMH-A pressure switch GML-A pressure switch GMH-A GMH-A6 GMH-A8 GML-A GML-A6 GML-A8 7-A 7-A 7-A 7-7A 7-8A 7-9A.00-0.00.0-60.0 0.0-00.0.00-0.00.0-60.0 0.0-00.0 All switches have 0 VAC neon lights factory installed We reserve the right to make any changes in the interest of technical progress. Karl Dungs Inc. Apollo Drive, Suite 0 Li Lakes, MN 0, U.S.A. Phone 6 79-89 Fax 6 79-899 e-mail info@karldungsusa.com Internet http://www.dungs.com/usa/ Karl Dungs GmbH & Co. KG P.O. Box 9 D-760 Schorndorf, Germany Phone +9 (0)78-80-0 Fax +9 (0)78-80-66 e-mail info@dungs.com Internet http://www.dungs.com 6 6