CleaverBrooks CFC-500 Operation, Service And Parts Manual page 12

Section 1 — Introduction
Safety Relief Valve
Hot Water
Outlet
High Temp.
Return
Low Temp.
Return
Flue Gas
Outlet
1-6
Combustion Fan and
Premix Gas Valve
Assembly
Figure 1-8 CFC Heat Flow and Component Orientation
Ignition Electrodes
and Flame Rod
Insulation Blanket
Burner
Canister
Control
Panel
"Finned" High
Efficiency AluFer
Tubes
Part No. 750-263