Gas Switch for DMV safety shutoff valves GAO-A GMH-A GML-A UL Listed UL 353 File # MH 1668 CSA Certified CSA C. No. LR 53 File # 0157 FM Approved Class 3510, 3530 File # J.I. 1Y9A9.AF Commonwealth of Massachusetts Approved Product Approval code G3-0106-191 Gas pressure switch Codes and Standards This product is intended for installations covered by but not limited to NFPA 85, NFPA 86, UL 795, CSD-1, ANSI Z83., ANSI Z83.18, ANSI Z1.13, CSA B19.1, CSA B19.3 and CSA B19.6. Gxx-A Sales Brochure P/N 6359 Ed. 09/17 DUNGS is an ISO 9001 manufacturing facility. Description The GAO-, GMH-, and GML-A pressure switches are compact, ventless gas pressure switches for modular valve train components. These 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 353 and limits the escape of gas less than 1.0 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 options allow direct on the housing. The GAO-, GMH-, and GML-A pressure switch is suitable for dry natural gas, propane, butane, air and other inert gases. Suitable for up to 0.1 % by volume, dry H S. A dry gas has a dew point lower than +15 F and its relative humidity is less than 60 %. 1 6
GAO-A SPDT pressure switch requires no 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 no 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 no 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--,3,5,6 7 PSI (500mbar) GMH- and GML-A--,6 7 PSI (500mbar) GAO-, GMH- and GML-A--8 1 PSI (1000 mbar) connection Temperature range: For series ending in -,-3,-5, and -6 For series ending in -8 O-ring flange connection on underside of pressure switch Ambient temperature Medium temperature Ambient temperature Medium temperature -0 F to +10 F (-0 C to +60 C) -0 F to +10 F (-0 C to +60 C) - F to +10 F (-30 C to +60 C) - F to +10 F (-30 C to +60 C) Materials Housing Aluminium Switch Polycarbonate Diaphragm NBR-based rubber Switching contact Silver Electrical ratings AC eff. min. V max. 0 V DC min. V max. 8 V Nominal current Indication light Electrical connection Enclosure rating NEMA Type Setting tolerance Silver (Ag) contact ratings AC 10 A resistive @ 10 VAC AC 8 A inductive @ 10 VAC DC min. 0 ma @ VDC DC max. 1 A @ 1-8 VDC 0.30 W energy consumption Screw terminals via 1/" NPT conduit connection ±15% switching point deviation referred to set point. Adjusted as pressure rises or as pressure falls, vertical diaphragm position. Vent Limiter Incorporates a vent limiter as per UL 353 and limits the escape of gas less than 1.0 CFH of natural gas at 7 PSI if internal switch diaphragm ruptures. GAO (Shown as a high gas limit) As pressure rises above set point, 1 NC opens, NO closes, Neon light ON (fault). As pressure falls below setpoint, switch resets: 1 NC closes and NO opens, Neon light off. GMH (Operating state shown) As pressure rises, NO closes, 1 NC opens, and Neon light ON (fault), switch trips and locks out. GML (Operating state shown) As pressure falls, NO opens, 1 NC closes, Neon light ON (fault), switch trips and locks out. Medium O (orange) NE (neon) Medium O (orange) NE (neon) Medium O (orange) NE (neon) 6
Dimensions inch (mm) GAO-, GMH-, GML-A Through hole x 0.16 (,) Reset button GMH-A... GML-A... Slot for O-ring NPT 1/ conduit connection Adapters / Replacement parts / Accessories Order No. For equipment Notes A Mounting kit (included with switch) 6188 GAO, GMH, GML M Screws, 10.5 x.5 O-ring DMV & MBC Port 3 adapter (side mount for high pressure switch 73777 DMV-D(LE) 701-703 MBC series 1000-000 NPT 1/ - NPT Replacement conduit adapter 0566 GAO, GMH, GML PG 11 to 1/ NPT adapter Replacement conduit adapter 0671 GAO, GMH, GML M 0 to 1/ NPT adapter Replacement cover 873 GAO Replacement cover 33113 GMH, GML Screw for replacement cover 37675 Replacement light (standard) 156 GAO, GMH, GML 10 VAC, yellow bulb Replacement light 157 GAO, GMH, GML VAC/VDC, yellow bulb Electrical plug for A (For usw with 10-318) Electrical plug for A (For usw with 10-318) DIN connector for A (For use with 19-659 or 7-6) 19659 GAO 76 GMH, GML 10318 GAO, GMH, GML Definition of switching hysteresis p The pressure difference between the upper and lower switching pressures. at meter Switching hysteresis Δp Setpoint tolerance Adjustment as pressure rises Upper switching pressure Rising Falling Lower switching pressure 3 6
A options FRI gas pressure regulator 3 yes for port 1 A options DMV 701-703 Dual modular valve 3 yes, with # 73777 yes, horizontal yes, vertical with #507 5 yes, horizontal yes, vertical with #507 for ports 1, and 3 (with 1975) 5 5 1 3 1 A options DMV 55,500-515/11 Dual modular valve 3 yes no 5 yes 6 no 7 no for port 1 for ports, 3 and 5 6 7 6
A options MBC series multifunctional control 3 yes, with # 73777 yes, horizontal yes, vertical with #507 5 yes, horizontal yes, vertical with #507 for ports 1, and 3 (with 1975) MBC ports 5 5 3 1 1 1 3 5 1 3 0 16 1 8 p Br 0 16 1 8 p Br A options SV 1005 and SV 1007 series safety valve 1 no 3 no no SV 1005 and SV 1007 Series ports (pressure switch only mounts to upstream port #) Back side tap Back side tap 3 1 3 Filter Front Front side side taps taps for port 1 3 3 3 1 3 5 1 3 A options SV 1010, SV 101, SV 1015, and SV 100 series safety valve 3 yes no 5 yes 5 Back side tap 3 Back side tap 1 3 Filter Front Front 5 side side taps taps for ports and 3 3 1 5 6
Gas Switch for DMV safety shutoff valves GAO-A GMH-A GML-A Type Version Order No. Setting range in. W.C. GAO-A pressure switch GMH-A pressure switch GML-A pressure switch GAO-A-- GAO-A--3 GAO-A--5 GAO-A--6 GAO-A--8 GMH-A-- GMH-A--6 GMH-A--8 GML-A-- GML-A--6 GML-A--8 6691 66915 66916 66917 66918 669 6695 6696 669 6693 669 All switches have 10 VAC neon lights factory installed 0.16-1.0 0.0 -.00.00-0.00 1.00-60.00 0.00-00.00 1.00-0.00 1.00-60.00 0.00-00.00 1.00-0.00 1.00-60.00 0.00-00.00 We reserve the right to make any changes in the interest of technical progress. Switching hysteresis in. W.C. 0.1 0.0 0.0 1..0 Factory Calibration Karl Dungs, Inc. 3890 Pheasant Ridge Drive NE Suite 150 Blaine, MN 559, U.S.A. Phone 763 58-1700 Fax 763 58-1799 e-mail info@karldungsusa.com Internet http://www.dungs.com/usa/ Karl Dungs GmbH & Co. KG P.O. Box 1 9 D-7360 Schorndorf, Germany Phone +9 (0)7181-80-0 Fax +9 (0)7181-80-166 e-mail info@dungs.com Internet http://www.dungs.com 6 6