Grand Bay 40 Direct Vent Freestanding
Page 29
January 2000
VERTICAL TERMINATIONS (cont.)
INSTALLATION INTO A CLASS A METAL CHIMNEY
NOTE:
Have the existing installation inspected by a qualified chimney sweep or professional
installer prior to converting to direct vent. The existing chimney system must be in
serviceable condition and functionally sound.
Step 1.
Remove existing chimney cap.
Step 2.
Measure the distance from the top of the chimney to the bottom of the ceiling support box,
add 3 (76mm) to this measurement, and cut a section of 4 (102mm) flex pipe to that
length (the flex should be extended to its nominal length).
Step 3.
Connect the end of the flex pipe section to the underside of the top adapter (SDV #985K,
986K or 987K), using three sheet metal screws (Figure 20).
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 (3.3mm) diameter holes through
the top adapter, and into the chimney top. Insure that you are drilling into the metal on the
chimney. Twist lock the high wind termination cap (SDV #991) onto the top adapter
(Figures 21 and 22).
Step 5.
Pull the flex pipe down through the ceiling support box, until it protrudes approximately
3 (76mm). Connect the flex pipe to the retro connector (SDV #909B), 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.
FIG. 22
FIG. 21
FIG. 20
SHEET
METAL
SCREWS
VENTING:
CLASS A
MET
AL CHIMNEY
