Keystoker K-2 Manual

K-2 and K-6 Flat Grate with 6 Inch Stack
Through these instructions we will try to guide you on a step by step procedure for
installing, adjusting and operating of your new KEYSTOKER stoker boiler unit.
Selection of location. Keystoker boilers are available with fire door on the right or
left side. When you stand at the stoker end of the boiler and look directly over top
of boiler toward stack end, you may choose to have a fire door on the right or left
side of boiler. Selecting a position to make this door accessible is important.
When door side must be placed toward a wall, 30" clearance is recommended for
easy fire and ash door access. Clearance from wall at stack end should be 18" to
permit removal of water heating coil if necessary. Clearance on blank and hopper
sides should be 6".
Setting up boiler. Place boiler in desired position. We strongly recommend
placing steel shims or bricks under each corner of boiler to allow an air space, to
prevent moisture from accumulating and rusting base of boiler. Using a level,
plumb stoker end of the boiler, adding steel shims as necessary to plumb the stoker
end of the boiler. Failure to do this will change pitch on stoker unit and may have
adverse effects when burning coal. Again with level, check top of boiler from side
to side, adding shims as necessary to level boiler. Do not place shims completely
under boiler. Allow 1" to 2" of shims to extend out from under the boiler. Shims
will then be used as a base to rest insulated jacket upon.
Supply & return piping system. The top of you boiler has at least 4 openings.
The largest opening is the feed line to your radiation. Since this outlet has a drop
tube welded inside the boiler, you must use if for your radiation supply line. Even
thou it may be necessary to bush down to a smaller size, we recommend starting
with 1 ¼" pipe and installing a 1 ¼" x 1 ¼" x 1" tee in supply line to be used for a
by-pass loop. (See Installation Diagram Pg6). You may now make your piping
connections from feed outlet on boiler to flow valve.
You may use either of the large openings on the bottom of the stack end of the
boiler as your return. Select the side that will allow convenient access to the
circulator for future servicing. Install return piping and circulator, again referring
to (Installation Diagram Pg 6) for location of by-pass loop. Your 1 ¼" x 1 ¼" x 1"
tee must be installed below circulator.
Install by-pass loop as per (Installation Diagram) with 1" pipe size. Place a tee 1'x
½" F x 1" in by-pass loop to allow installation of immersion well for the 4006B
Honeywell Hi Limit control to extend into full water flow.
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