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Direct OEM Replacement: Fully compatible internal replacement for Lochinvar 100277765
Key Benefits Universal Compatibility: Engineered to fit the entire FS4-3 series and AF-1 / AF-2 / AF-3 air flow switch models
it provides consistent millivolt output to the safety shut-off valve
Common Questions What causes a transformer like the 621807R to fail
Belimo ZG-LMSA-1 Shaft Extension Direct OEM Replacement: Fully compatibleThe Belimo ZG LMSA 1 Shaft Extension is a critical hardware component designed for field technicians requiring a 3 8 inch diameter shaft extension to bridge the gap between actuators and recessed or inaccessible damper shafts. This 4 inch length extension provides a stable, direct drive connection for LM series actuators and other compatible HVAC damper actuators requiring specific clearance. Built with professional grade materials, the ZG LMSA 1
