750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
i
Promethean Boilers, Model 4WI
750-211
Table of Contents
CHAPTER 1 Firetube Operation Basics 1-1
1.1 — Overview 1-1
1.2 — The Boiler 1-3
1.3 — Construction 1-4
1.4 — Steam Controls (All Fuels) 1-5
1.4.1 — Controls 1-5
1.4.2 — Low Water Cutoff 1-5
1.4.3 — Water Column 1-6
1.4.4 — Steam Pressure Gauge and ALWCO 1-6
1.4.5 — Safety Valve(s) 1-6
1.5 — Hot Water Controls (All Fuels) 1-7
1.5.1 — Pressure and Temperature Gauges 1-7
1.5.2 — Controls 1-7
1.5.3 — Low Water Cutoff and ALWCO 1-8
1.5.4 — Safety Valve(s) 1-8
1.6 — IFGR Components 1-8
CHAPTER 2
Burner Operation and Control 2-1
2.1 — The Burner 2-1
2.2 — Controls Common to all Boilers 2-2
2.3 — Control and Component Function 2-3
2.4 — Components Common to all Boilers 2-3
2.5 — Controls for Gas Firing 2-6