{"product_id":"charging-airflow-electric-the-field-reference","title":"Charging, Airflow \u0026 Electric — The Field Reference","description":"\u003cp\u003eThe three things that come up on every service call, in one book. Charging procedures for fixed-orifice and TXV systems, airflow verification before you touch the gauges, and electrical troubleshooting from the disconnect to the contactor — with wiring diagrams, formulas and step-by-step walkthroughs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChecking the charge: target superheat, target subcooling, approach method\u003c\/li\u003e\n\u003cli\u003eAirflow first: temperature split, static pressure, filter and coil checks\u003c\/li\u003e\n\u003cli\u003eElectrical: reading a schematic, testing capacitors, checking contactors\u003c\/li\u003e\n\u003cli\u003e24V control circuits: thermostat wiring, transformer loads, troubleshooting open circuits\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSized to fit a tool bag. Every procedure sourced.\u003c\/p\u003e","brand":"HVAC Resource","offers":[{"title":"Default","offer_id":68022335668326,"sku":null,"price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/4347\/0438\/files\/hvacr-pb-field.jpg?v=1794392002","url":"https:\/\/hvacresource.us\/products\/charging-airflow-electric-the-field-reference","provider":"hvacresource","version":"1.0","type":"link"}