750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
1-1
CHAPTER 1
Firetube Operation Basics
1.1 — Overview
Firetube boilers are available for low or high pressure steam, or for hot water applications. Firetube boilers are typ-
ically used for applications ranging for 15 to 1800 horsepower. A firetube boiler is a cylindrical vessel, with horizon-
tal tubes passing through and connected to the front and rear tube sheets. The vessel contains the water and
absorbs the energy generated from the flame.
The front door and rear door provide the seal to con-
tain the hot combustion gases. Baffles designed into
the doors serve to redirect the combustion gases
through the various firetube passages. The flame orig-
inates in the furnace. As the combustion gases travel
down the furnace and through the various firetube
channels, heat from the flame and combustion gases is
transferred to the water.
FIGURE 1-1.
Open Front and Rear Doors
Transferred energy develops into the required steam or hot water. The primary purpose of the boiler is to supply
energy to the facility’s operations — for heat, manufacturing processes, laundry, kitchen, etc. The nature of the
facility’s operation will dictate whether a steam or hot water boiler should be used.
The general information in this manual applies directly to Cleaver-Brooks Promethean boilers ranging from 100
through 800 boiler horsepower for the following fuels:
Series 100
Light Oil (No. 2)
Series 200
Light Oil (No. 2) or Gas
Series 400
Heavy Oil (No. 6) or Gas
Series 600
Heavy Oil (No. 6)
Series 700
Gas
Summary of Contents for 4WI
Page 46: ...Burner Operation and Control 2 22 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Page 62: ...Waterside Care and Requirements 3 16 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Page 70: ...Sequence of Operation 4 8 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
Page 114: ...Adjustment Procedures 6 28 750 211 revised 2009 Promethean Boilers Model 4WI Manual...
