Hearth & Home Technologies COLBAY-FS-B User Manual

Page  20

10/08

Quadra-Fire  •  Columbia Bay  •  250-5195 Rev. K

CUT AND BEND FLASHING AS 
NEEDED TO FIT CHIMNEY

SEALANT-ADHESIVE

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 wall thimble is required. 
This allows the retro connector to mount directly on the 
masonry and provide the correct clearances to combustibles 
(Figure 5.26).

Step 3.
Secure the flashing to the top of the masonry chimney using 
a bead of non-hardening sealant-adhesive. If the flashing is 
larger than the top of the chimney, cut and fold flashing as 
needed to fit chimney 

(Figure 5.27).

Step 4.
To determine the length of flex needed, measure from 3 in. 
(76mm) above the top of the flashing down to the level of the 
opening. Add the distance from the center of the chimney 
out through the wall. Cut a piece of 4 in. (102mm) flex to this 
length (extended to its nominal length). Be sure to leave 2-3 
in. (51-76mm) of flex above the existing chimney to allow for 
connection to the termination kit.

Step 5.
Connect the flex liner to the top adapter using three sheet 
metal screws (

Figure 5.22, page 19).

Step 6.   
Feed the flex liner through the flashing into the chimney. 
Carefully feed the flex liner down the chimney to the bottom 
and out the opening in the masonry wall, forming an angle to 
line up the flex liner with the vent opening on the appliance.

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.