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M414038
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Steam Requirements
Obtain specific steam service pipe sizes from steam
system supplier or a qualified steam fitter.
● Refer to Figure 16 and Figure 17 for proper
steam pipe configurations.
● To prevent condensate draining from headers to
tumbler, piping should have a minimum 12 inch
(305 mm) rise above respective header. Do not
make steam connection to header with a
horizontal or downward facing tee or elbow.
● Whenever possible, horizontal runs of steam
lines must drain, by gravity, to respective steam
header. Water pockets or an improperly drained
steam header will provide wet steam, causing
improper operation of tumbler. If pockets or
improper drainage cannot be eliminated, install a
bypass trap to drain condensate from the low
point in the steam header to the return.
● In both steam supply and steam return line, it is
recommended that each have a pipe union and
globe valve. This will enable you to disconnect
the steam connections and service the tumbler
while your laundry facility is in operation.
● Before connecting trap and check valve to
tumbler, open shut-off valve in steam supply line
and allow steam to flow through tumbler to flush
out any dirt and scale from tumbler. This will
assure proper operation of trap when connected.
● After flushing system, install vacuum breaker,
bucket trap (with built-in strainer) and check
valve. For successful operation of tumbler, install
trap 18 inches (457 mm) below coil and as near
to the tumbler as possible. Inspect trap carefully
for inlet and outlet markings and install
according to trap manufacturer’s instructions. If
steam is gravity returned to boiler, omit trap but
install vacuum breaker and check valve in return
line near tumbler.
● Install union and shut-off valve in return line and
make final pipe connections to return header.