Manual Reset Capability: Forces a manual inspection of the HVAC system if a high-limit trip occurs

eliminating the need for field-modified universal gaskets

discharge range for stable appliance operation

requiring technician verification

it includes the necessary slots for the standard two-screw mounting configuration

Nu-Calgon 4320-W8 Acid Test Kit Manual Reset Capability: Forces aThe Nu Calgon 4320 W8 Phase III Acid Test Kit is a critical diagnostic tool for field technicians to quantify acid contamination in HVACR systems. Unlike basic indicators, this kit utilizes phase separation technology to provide a clear, undeniable color change in the acid indicator layer, eliminating guesswork during service calls. As the direct replacement for 064427, it is engineered for universal compatibility with mineral oil, alkylbenzene, and