July 12, 2006
Page 19
Heat & Glo · Mission Bay · 250-7512F
4. Existing Masonry Chimney
Figure 5.24
TERMINATION CAP
PART #SLK-991DA
FLASHING
4 in. (102mm)
FLEX LINER
TOP ADAPTER
RETRO CONNECTOR
90 DEGREE ELBOW
DIRECT VENT PIPE
HIGH WIND
TERMINATION
CAP
SHEET METAL
SCREWS
DRILL FOUR 1/8 in.
(3mm) DIAMETER
HOLES
Figure 5.22
Figure 5.23
Step 4.
Pass the flex pipe down through the center of the chimney
system, and center the top adapter on the top of the chimney
pipe. Drill four 1/8 in. (3mm) diameter holes through the
top adapter, and into the chimney top. Ensure that you are
drilling into the metal on the chimney. Twist lock the high
wind termination cap onto the top adapter
(Figures 5.22
and 5.23)
.
Step 5.
Pull the flex pipe down through the ceiling support box, until
it protrudes approximately 3 in. (76mm). Connect the flex
pipe to the retro connector, and attach with sheet metal
screws.
Step 6.
Push the flex pipe back up into the ceiling support box,
center the retro connector, and attach it to the support box
with sheet metal screws.
Step 7.
The connection between the appliance and the retro
connector may be completed with sections of direct vent
pipe.
Step 1.
Before cutting any holes, assemble the desired sections
of direct vent pipe to determine the center of the masonry
penetration.
Step 2.
Once the center point of the penetration has been determined,
cut a 6 in. (152mm) diameter hole in the masonry. If the hole
is too large, the retro connector might not mount properly; if
the hole is too small, the appliance might starve for intake
air. If there is a frame wall in front of the masonry wall, cut
and frame a 10 in. (254mm) square opening in the wall
(centered around the 6 in. (152mm) masonry opening). If
there is sheet rock only (no studs) in front of the masonry the
10 in. (254mm) opening is still needed, but does not need
to be framed. If the hole is framed a round support box/wall
thimble is required. This allows the retro connector to mount
directly on the masonry and provide the correct clearances
to combustibles (
Figure 5.25
, on the next page).
CAUTION
Ensure that existing chimney is functionally sound and clean.
• Have inspection done by qualified chimney sweep or
professional installer BEFORE converting to direct vent
appliance.