750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
1-9
1.6 — IFGR Components
On dual-fuel boilers with two jackshaft drive arms, as defined above, a proximity switch is used to prove that the
correct linkage connection is made. (Refer to the wiring diagram provided with the boiler.)
FIGURE 1-11. Cross Section of Front Head
FIGURE 1-12. Over-Travel Mechanism and Fuel Changeover Linkage
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