6
P/N 42-9551
KN Series Gas-fired direct vent cast iron boilers – Field assembly instructions
Step 5
Prepare section for baffle
Use of an approved dust
respirator is strongly recom-
mended when handling the
insulating components of the
boiler.
1. Spray cast iron heat pin section liber-
ally with spray adhesive supplied with
the boiler.
2. Avoid spraying on the nipple port
machined surfaces.
Step 6
Install baffle
Do not use baffles if they
have been broken, cracked,
folded or frayed. Obtain re-
placements before proceed-
ing with the boiler assembly.
1. Place a baffle in the heat pin area of
the front section as shown.
2. The cut-off corner must go to the
lower right.
3. Press into place.
4. Make sure the baffle does NOT
overlap onto the perimeter surfaces
of the section. This would prevent the
section from drawing up correctly.
Step 7
Apply RTV to perimeter
Rubber gloves are recom-
mended for this procedure.
1. Apply a bead of silicone RTV (sup-
plied with boiler) on the perimeter
surfaces of the section and around
the INSIDE edges of the nipple ports.
2. This is necessary to form a seal be-
tween the sections. The seal prevents
flue gases from escaping.
3. Extend the bead all the way from the
top of the section to the bottom.
4. Keep the bead of silicone close to the
INSIDE edge of the nipple ports.
5. This will protect the machined nipple
port surfaces from condensation that
may occur in the flueways.
