15
P/N 42-9551
KN Series Gas-fired direct vent cast iron boilers – Field assembly instructions
Step 37
Install pilot assembly
1. Use a flashlight to look down through
the pilot mounting hole at the top
rear of the manifold.
2. The pilot tube (shown in
Step 34, page 14 at the top rear of
the burner) must be aligned with the
hole in the manifold.
3. If the pilot tube is not aligned, use a
screwdriver to reach into the mani-
fold hole and coax the pilot tube into
position.
4. After ensuring the pilot tube is
aligned properly, insert the pilot
orifice assembly as shown.
5. Screw the pilot orifice into the
manifold hole securely. DO NOT over-
tighten.
Step 38
Install burner inspection
port
1. The burner inspection port consists of
a plate, gasket, inspection glass, and
another gasket.
2. Place against the mounting boss on
the top front section.
3. Secure with the bolts and washers
provided.
Step 39
Install plug in front sec-
tion lower nipple port tapping
1. Obtain the 3” flat plug supplied with
the boiler.
2. Apply pipe dope to the tapping and
the plug.
3. Install the plug securely.
