{"product_id":"lochinvar-cwn500pm-f9-commercial-gas-water-heater-500k-btu","title":"Lochinvar CWN500PM-F9 Commercial Gas Water Heater 500K Btu","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe LOCHINVAR CWN500PM-F9 is a copper-fin atmospheric gas commercial water heater rated at 500,000 BTU\/h input. It uses an intermittent spark ignition firing control (F9 configuration) and a copper finned tube heat exchanger to transfer heat efficiently while reducing the risk of leaks. The unit operates on 120 volts and is designed for high-demand commercial hot water applications where a separate storage tank is paired with the heater for full system performance. A factory-installed ASME temperature and pressure relief valve ships with the unit. Licensed plumbers and commercial HVAC technicians are the primary installers for this equipment.\u003c\/p\u003e\u003cp\u003eThis water heater is built for commercial installations that require a reliable atmospheric vent configuration. The built-in draft hood accommodates limited overhead clearance, and the front-sliding heat exchanger design provides direct access for routine service. The Loch-Heat ceramic tile lining reduces overall unit weight compared to conventional linings. With a water flow rate of 30 GPM and a recovery rate of 693 gallons per hour at a 70 degrees F rise, the CWN500PM-F9 is suited for hotels, schools, laundries, and similar high-volume commercial facilities. Max working pressure is 160 psi and max water hardness is 25 grains.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e500,000 BTU\/h input rating for high-demand commercial hot water generation\u003c\/li\u003e\n\u003cli\u003eCopper finned tube heat exchanger with 52.1 square feet of heating surface reduces leak risk and inhibits lime scale buildup\u003c\/li\u003e\n\u003cli\u003eF9 intermittent spark ignition firing control — standard on CW 315-500 series units\u003c\/li\u003e\n\u003cli\u003eBuilt-in draft hood designed for installations with limited overhead clearance\u003c\/li\u003e\n\u003cli\u003eFactory-installed ASME-rated temperature and pressure relief valve (rated at 1,912 MBH, 150 psi, 210 degrees F)\u003c\/li\u003e\n\u003cli\u003eFront-sliding heat exchanger allows quick component access without full disassembly\u003c\/li\u003e\n\u003cli\u003eCeramic tile lining (Loch-Heat) reduces overall unit weight by approximately 25 percent versus conventional designs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eThe CWN500PM-F9 uses the F9 intermittent spark ignition firing control, which is standard for the Lochinvar CW 315-500 series copper-fin atmospheric water heaters. This unit pairs with a separate storage tank as part of a complete commercial hot water system.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation must be performed by a licensed plumber or qualified commercial HVAC technician in accordance with local plumbing codes and the applicable fuel gas code (IFGC or local equivalent). Shut off the gas supply and disconnect electrical power at the circuit before beginning any service or replacement work. The vent connection requires a 10-inch vent pipe; verify clearances and vent material ratings before connecting. Water connections are 2 inches and the drain connection is 3\/4 inch — confirm existing piping sizes match before installation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBTU\/h Input\u003c\/strong\u003e: 500,000 BTU\/h\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiring Control\u003c\/strong\u003e: F9 Intermittent Spark Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 120 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Flow Rate\u003c\/strong\u003e: 30 GPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecovery Rate at 70 degrees F Rise\u003c\/strong\u003e: 693 GPH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecovery Rate at 100 degrees F Rise\u003c\/strong\u003e: 485 GPH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecovery Rate at 140 degrees F Rise\u003c\/strong\u003e: 346 GPH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Working Pressure\u003c\/strong\u003e: 160 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Water Hardness\u003c\/strong\u003e: 25 grains\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeating Surface\u003c\/strong\u003e: 52.1 square feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Loss\u003c\/strong\u003e: 7 feet of head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGallon Capacity (unit vessel)\u003c\/strong\u003e: 1.2 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Inlet Connection\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Connection\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrain Connection\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent Size\u003c\/strong\u003e: 10 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Valve Size\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Valve Pressure Rating\u003c\/strong\u003e: 150 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Valve Temperature Rating\u003c\/strong\u003e: 210 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRelief Valve Rating\u003c\/strong\u003e: 1,912 MBH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Relief Valves\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth (including pump)\u003c\/strong\u003e: 62.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 34.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth\u003c\/strong\u003e: 22 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: LOCHINVAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: CWN500PM-F9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LOCHINVAR","offers":[{"title":"Default Title","offer_id":51383239639346,"sku":"CWN500PM-F9","price":7428.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312670486.jpg?v=1782590710","url":"https:\/\/voomisupply.com\/products\/lochinvar-cwn500pm-f9-commercial-gas-water-heater-500k-btu","provider":"Voomi Supply","version":"1.0","type":"link"}