Chimney Cap Installation - MHSC SB50HB Installation, Operation And Maintenance Manual

SB50HB Series Woodburning Fireplace
CHIMNey Cap
SpeCIaL NOTe: The proper height as previously explained is important to assure proper draft
and safety. The chimney cap extends the flue outlet four inches above the top of the last section
of chimney. This should be kept in mind when determining the proper height for the chimney. The
chimney should not be extended more than 90 inches above the supporting roof structure without
additional support. In the case of an "A" frame type construction or other steep pitch roofs that require
more than 90 inches of chimney above the roof, a support should be attached to the chimney at the
90 inch level that is strong enough to support a wind load of 3Z\, pounds for each inch the chimney
extends above 90 inches. The flue outlet must be a minimum of three feet above the point where
in penetrates the roof.
CauTION: Be careful to avoid electrical shock hazard when contacting wires to the metal chimney
components.
1. Extend the regular chimney sections until the top of the chimney is 4 inches below the total flue
height desired. Do not snap the last section of inlet air duct or largest diameter pipe in place
until Step 3 is completed.
. Remove the shingles from around the chimney so that the flashing may be installed, with the
upper part of the flashing under the shingles.
3. Set the flashing on the roof. Hold a section of the outside pipe (13C\," diameter) on the flashing
and scribe a line around the flashing, then cut the top off the flashing by cutting 1/4 inch below
the scribed line. This should increase the diameter of the flashing outlet sufficiently to allow the
flashing to be placed over the chimney. Figure 26
4. Snap the last section of inlet air duct in place and slide the flashing over the chimney. Adjust the
chimney to assure that the proper minimum clearances are maintained.
5. Nail the flashing securely in place with eight nails.
6. Seal the crack between the top of the flashing and the chimney with mastic. Leave some excess
mastic at this area to be used in step eight. NOTe: Use pliers and wear gloves when performing
step seven to minimize the danger of cutting your hands on the edge of the storm collar.
7. Place the storm collar around the chimney and put the collar together like a belt in belt loops.
Slide the end of collar under the two loops on the other end with the loops facing up. Overlap
the ends of the collar until it is tight against the chimney. Bend the free end of the collar back
over the loops to hold the storm collar securely together. The excess end of the storm collar
may be trimmed off.
8. Slide the storm collar down snugly against the flashing until the excess mastic left in step six is
forced up into the crack between the storm collar and the chimney. This should make the joint
between the flashing and the chimney watertight.
9. Install the chimney cap by placing the cap into matching parts of the last chimney section. Then
punch or drill 1/8 inch diameter holes in the inlet air duct (chimney pipe) where specified on the
brackets and fasten it down with the No. 8 screws provided. Do not penetrate the inner stainless
steel pipe while installing the screws.
10. Check all the parts of the fireplace, chimney and chimney termination cap to assure that no parts
have been damaged or bent during installation and that all parts have been installed properly.
NOTe: The metal used for the chimney cap has a rust protective coating but the cut edges of the
parts are not protected. To prevent rusting and rust staining of nearby structures, exposed parts of
the chimney and chimney cap should be detergent washed and painted with a galvanized primer
paint.


CHIMNey Cap INSTaLLaTION

87D0058