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SERIES 28HE BOILER INSTALLATION AND OPERATION INSTRUCTIONS
Observation Port Assembly, Figure 10
1. Position the hinged end of the steel flapper door,
item 5, over the boss on the observation port cover,
item 4.
2. Drive the expansion pin, item 7, through the hinge
bosses to secure the door to the cover.
3. Insert the hex bolt, item 6, through the hole in the
observation port cover.
4. Install the spring, nut and knob, items 3, 2 & 1 on
the bolt as shown. Use the nut, item 2, as a jam
nut against the knob, item 1.
5. Apply the insulating tape to the back of the
observation port cover as shown.
Figure 9 - Burner Mounting Plate Details
Figure 10 - Observation Port Assembly