STA-RITE SR200NA Service Manual page 71

SECTION FOUR – Routine Maintenance and Professional Servicing
Vent Body Retrofit For Enclosed Installations
(Continued from the preceding page)
7. Heat around the inside of the Combustion chamber
Flue Collar with a propane torch to soften the
epoxy; peel the plastic collar off the Combustion
Chamber Flue Collar and scrape the Flue Collar
clean with a putty knife.
8. Remove 3/8-24 plug from the side of the Elbow.
9. Apply UltraCopper * RTV Silicone (supplied) to the
®
sealing faces of the Probe and its nut and install the
Probe in the 3/8" hole in the Elbow (Figure 4-6).
10. Apply UltraCopper * RTV Silicone to the sealing
®
face of the nut and tighten it onto the Probe from
inside the Elbow.
Figure 4-6: Apply 600°F RTV to sealing faces of
probe and nut and install probe.
Drill 5/32" for
#10 Sheet Metal
Screws (2 Places)
Figure 4-7: Drill Combustion Chamber Flue Collar
as shown for Probe and for sheet metal screws for
Welded Vent Elbow Assembly.
11. Check the fit between the Elbow and the
Combustion Chamber Flue Collar. It should be a
close, uniform fit all the way around – not more
than 3/16"clearance at any point. If not, the
Combustion Chamber Flue Collar is out of round.
Use a C-clamp to gently round it up. The Elbow
must fit and seat (bottom lip should be 4-3/8"
above the Flue Collar flange) before applying any
adhesive.
12. Before applying any adhesive to the Metal Elbow or
the Combustion Chamber Flue Collar, set the Elbow
on the Flue Collar with the Elbow's detent mark
aligned with the centerline of the Stack Flue Switch.
Drill two 5/32"holes into the Combustion Chamber
Flue Collar through the pre-drilled holes on oppo-
site sides of the Elbow (Figure 4-7). These holes will
take #10 sheet metal screws to mechanically lock
the Elbow to the Combustion Chamber Flue Collar.
Don't install the screws yet.
13. The Welded Metal Elbow Assembly is pre-drilled
(Figure 4-8) to take #10 sheet metal screws to lock
the Appliance Adapter to the Elbow Assembly after
it has been RTV glued in place.
(Continued on the next page.)
Elbow is pre-drilled
on both sides for
#10 Sheet Metal
Screws
Apply 1/4" beads
of Silicone RTV
near mouth of
Vent Ass'y
and Flue Collar
as shown.
Figure 4-8: Apply Silicone RTV beads as shown.
Spread out RTV with a tongue depressor or a rub-
ber gloved finger.
4-39
Apply additional
2" long beads
front and back
as shown