I rip out 100% of residential boiler wiring systems fully intact to show beginners how many boilers are wired. In this video I will cover the components of an older Crown boiler with a L8148E Honeywell aquastat and Honeywell 4 wire zone valves.
00:00 Introduction
00:40 120 Volt Power @ Aquastat
01:36 T, TV, Z and W Terminals
02:25 Zone Valves & Thermostats Overview
03:06 T & T Circuit Concept / Wiring
04:27 Zone Valve Motor Circuit Off Z To TV
06:27 Zone Valve End Switch Circuit Off Z to T
07:06 Aquastat Internal Relays / Controls
08:30 Burner Circuit: Spill Switch, Roll Out, Gas Valve
10:09 Powered Demonstration / Sequence of Operation
HVAC / HVAC Training
