For lead/lag or more complex sequencing

the York S1-326-39532-000 includes the specialized mounting gasket required for an airtight seal against the collector box

This 2-way ball valve HVAC component features a 1/2-inch NPT connection and a substantial 15 Cv valve rating

This specific power assembly is charged and calibrated specifically for R12 refrigerant applications to maintain the correct pressure-temperature relationship

specify a TCONT103 or similar multi-stage controller

Siemens Building Technology 192-505 Tubing 328140-751 For lead/lag or more complexThe Siemens Building Technology 192 505 is a professional grade tubing loop kit designed for seamless integration with pneumatic thermostats and building automation systems. This 10 piece set provides 8 inch lengths of high quality 5 32" OD plastic tubing, pre assembled with a coupling and union to streamline field installations. Engineered for Siemens Product Group 19X, these loops feature an anti kink spring that maintains consistent airflow and