Kan. Admin. Regs. § 49-52-11 - Feedwater connections, automatic low water fuel cutoff, and water-feeding devices
(a) Feedwater,
makeup water, or water treatment materials shall be introduced into a boiler
through the return piping system or through an independent feedwater connection
that does not discharge against parts of the boiler exposed to direct radiant
heat from the fire. Feedwater, makeup water, or water treatment materials shall
not be introduced through openings or connections provided for any of the
following:
(1) Inspection or cleaning;
(2) safety valves or safety relief
valves; or
(3) surface blowoff, or
the water column, water gauge glass, pressure gauge, or temperature gauge.
(b) The feedwater pipe
shall be provided with a check valve near the boiler and a stop valve or cock
between the check valve and the boiler or return pipe system.
(c) Each automatically fired steam or vapor
system boiler shall be equipped with an automatic low water fuel cutoff located
in a manner that will automatically cut off the fuel supply when the surface of
the water falls to the lowest safe water line. The boiler shall also have a
secondary low water cutoff that will cut off the fuel supply and lock out the
burner and shall be equipped with a manual reset. If a water-feeding device is
installed, it shall be constructed so that the water inlet valve cannot feed
water into the boiler through the float chamber. The interfeeding device shall
be located to supply requisite feedwater. The lowest safe water line shall not
be lower than the lowest visible part of the water glass.
(d) A fuel or feedwater control device may be
attached directly to a low pressure boiler on the tapped openings in low
pressure boilers that are provided for attaching a water glass directly to the
boiler. The connections between the boiler and the water glass shall be
nonferrous tees or Y's of not less than 1/2 inch pipe size. The water glass
shall be attached directly, and as closely as possible, to the boiler. The
water glass fittings shall be attached to the straightway topping of the Y or
T. The fuel cutoff or water-feeding device shall be attached to the side outlet
of the Y or T. The ends of all nipples shall be reamed to full-size diameter.
(e) Designs using a float and
float bowl shall have a vertical, straight-away valve drain pipe at the lowest
point in the water-equalizing pipe. The connections in this installation shall
permit the bowl and the equalizing pipe to be flushed and the device tested. A
low water fuel cutoff control device shall be installed in all hot water
heating systems with inputs exceeding 400,000 BTUH. Blowdown valves and pipe
attachments shall be a minimum of 3/4 inches.
(f) A low water fuel cutoff shall be
installed on all hot water heating systems, including systems under 400,000
BTUH that are not exempted. The low water cutoff shall be a float type, flow
switch, or probe type installed in the boiler or piping above the boiler.
(g) Low water cutoffs installed on
all hot water heating boilers shall be installed above the boiler and shall be
equipped with a manual rest, with no intervening valves between the boiler and
the low water cutoff.
Notes
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No prior version found.