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Manual Override: Features a gear release lever for swift manual adjustments and system testing without power
and 42S-A models
The York S1-028-09985-700 Sheave is a precision-engineered single groove cast iron pulley designed for heavy-duty HVAC blower and motor assemblies
making it suitable for large-scale commercial boilers and industrial water heaters
5 VDC conversion designed for the RLD-H10-105 belt pack and internal battery assemblies
Robertshaw 780-845 Ignition Module R-410A Manual Override: Features a gearThe Robertshaw 780 845 Ignition Module is a veteran standard intermittent pilot ignition control engineered for reliability in gas fired heating systems. Designed as a versatile SP845 factory model, this 24V AC unit features solid state logic and flame rectification for precise automatic sequencing. It serves as the direct replacement for 100 00831 05 and 9004426105, effectively consolidating truck stock for service contractors. The module delivers 4