Markel 51135001 Relay 319847-401 The 18H61 features CCWLE (Counter-Clockwise

The 18H61 features CCWLE (Counter-Clockwise Lead End) rotation

or mechanical obstruction in the valve body preventing the plunger from seating

the SP20166A manages manifold pressure effectively to ensure consistent pilot ignition and main burner performance

This unit features a 120V AC Coil Class F insulation rating

Its rugged construction facilitates optimal thermocouple or thermopile output

Markel 51135001 Relay 319847-401 The 18H61 features CCWLE (Counter-ClockwiseThe Markel 51135001 Relay is a specialized 24V fan time delay relay engineered for precise sequencing in commercial and residential HVACR applications. As an OEM specified component, it utilizes advanced bimetal disc technology (comparable to Therm O Disc 15S1) to manage the operational timing of indoor blowers, exhaust fans, and cabinet unit heaters. This HVAC ventilation control device ensures that the fan continues to run for a designated period