{"product_id":"ac-service-tech-llc-hvac-quick-reference-cards-3-card-set-pocket-sized-weather-resistant-charging-troubleshooting-guide","title":"AC Service Tech LLC HVAC Quick Reference Cards — 3-card set, pocket-sized weather-resistant charging \u0026 troubleshooting guide","description":"\u003cp\u003e\u003cstrong\u003eAC Service Tech LLC HVAC Quick Reference Cards are a set of three durable double-sided polystyrene cards that give technicians fast refrigerant charging, measurement, and troubleshooting data on the job.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese pocket-sized HVAC reference cards collect essential charging and diagnostic tables — subcooling, superheat, delta T, P\/T data, refrigerant weight per foot, and blend-saturation guidance — into a weather-resistant format designed for field use. The cards are built for quick lookups during service of air conditioners and heat pumps, helping you evaluate refrigerant charge and heat transfer without fumbling through phone apps or bulky manuals.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these cards help determine if a system is correctly charged?\u003c\/h3\u003e\n\u003cp\u003eThe cards provide both target subcooling and target superheat tables so you can compare measured values to recommended targets based on metering device type. By following the correct table for TXV or fixed-orifice systems, you can quickly identify undercharge, proper charge, or overcharge conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTarget Subcooling table for TXV-equipped systems\u003c\/li\u003e\n  \u003cli\u003eTarget Superheat and Total Superheat tables for fixed orifice systems\u003c\/li\u003e\n  \u003cli\u003eSimple comparison method—measure, reference, and interpret on the spot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat diagnostic data is included for heat transfer and performance checks?\u003c\/h3\u003e\n\u003cp\u003eBuilt-in Delta T guidance and quick P\/T charts let you verify whether the system is exchanging heat correctly and if refrigerant pressures match expected saturated temperatures. This helps isolate cases of insufficient airflow, fouled coils, or charge-related issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDelta T reference to evaluate evaporator\/condenser temperature differences\u003c\/li\u003e\n  \u003cli\u003eP\/T chart for five common refrigerants showing saturated temperatures\u003c\/li\u003e\n  \u003cli\u003eBlend refrigerant bubble\/dew point guidance for mixed refrigerants\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan these cards assist with charging by weight and field-service weighing?\u003c\/h3\u003e\n\u003cp\u003eYes — the set includes a refrigerant weight-per-foot chart and a brief weighing procedure so you can calculate refrigerant needed for tubing runs and add full or partial charges accurately to a vacuumed system. The weight chart speeds line-length calculations without needing separate references.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRefrigerant weight per foot table for multiple refrigerants\u003c\/li\u003e\n  \u003cli\u003eStep-by-step weighing guide for full or partial charges\u003c\/li\u003e\n  \u003cli\u003eQuick conversion notes reduce calculation errors on site\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and field-ready are these cards for everyday HVAC service?\u003c\/h3\u003e\n\u003cp\u003eManufactured from polystyrene and tested for extremes between 0°F and 130°F, the cards resist bending, weather, and UV exposure so they stay legible in harsh conditions. Their flexible, double-sided layout keeps three essential reference surfaces in a compact pack that fits in a tool pouch or glove compartment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePolystyrene material tested for 0°F–130°F service conditions\u003c\/li\u003e\n  \u003cli\u003eWeather and UV resistant for outdoor and rooftop use\u003c\/li\u003e\n  \u003cli\u003eThree double-sided cards offer broad coverage while staying compact\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? HVAC technicians, service contractors, and advanced DIYers working on air conditioners and heat pumps who need fast, reliable refrigerant and diagnostic data in the field will benefit from these cards. They’re made for pros who value speed and accuracy during troubleshooting, charging, and heat-exchange checks, and for trainers who want a durable reference for apprentices. These cards do not replace service manuals or manufacturer-specific procedures but act as a practical, portable supplement to streamline on-site decision making.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do the cards cover both TXV and fixed-orifice systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. They include target subcooling for TXV systems and target\/total superheat tables for fixed-orifice systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these cards usable outdoors and on rooftops?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Polystyrene construction is weather- and UV-resistant and tested from 0°F to 130°F for field conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AC Service Tech LLC","offers":[{"title":"Default Title","offer_id":48086171877534,"sku":"B082895BBX","price":46.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ac-service-tech-front-packaging-cards.jpg?v=1785888327","url":"https:\/\/northtrailauto.ca\/products\/ac-service-tech-llc-hvac-quick-reference-cards-3-card-set-pocket-sized-weather-resistant-charging-troubleshooting-guide","provider":"North Trail Auto","version":"1.0","type":"link"}