ii
750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
2.6 — Controls Common to Oil-Fired Boilers (Including Combination) 2-8
2.7 — Additional Controls for Heavy Oil 2-11
2.8 — Controls for Combination Burners Only 2-13
2.9 — Combustion Air 2-14
2.10 — Automatic Ignition 2-14
2.11 — Atomizing Air 2-15
2.12 — Oil Fuel Flow: Light Oil 2-16
2.13 — Oil Fuel Flow: Heavy Oil 2-17
2.14 — Gas Fuel Flow 2-19
2.15 — Modulating Firing 2-20
CHAPTER 3
Waterside Care and Requirements 3-1
3.1 — Overview 3-1
3.2 — Water Requirements 3-2
3.2.1 — Hot Water Boilers 3-2
3.2.1.1 — Air Removal 3-2
3.2.1.2 — Minimum Water Temperature 3-2
3.2.1.3 — Rapid Replacement of Boiler Water 3-2
3.2.1.4 — Continuous Flow Through the Boiler 3-3
3.2.1.5 — Water Circulation 3-4
3.2.1.6 — Multiple Boiler Installations 3-4
3.2.1.7 — Pump Location 3-5
3.2.1.8 — Pump Operation 3-5
3.2.1.9 — Pressure 3-5
3.2.2 — Steam Boiler 3-6
3.2.2.1 — Feed Pump Operation 3-6
3.2.2.2 — Water Feeder (optional) Operation 3-6
3.3 — Water Treatment 3-6