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M414905
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Steam Requirements
NOTE: Machines require a constant 80 to 100 psig
(5.62 to 7.03 kg/sq cm) steam service for optimum
operation. The maximum allowable steam pressure
for use with 60 Hertz or 50 Hertz tumblers is
125 psig (8.6 bar). In no case may the pressure
exceed the above value.
Obtain specific steam service pipe sizes from steam
system supplier or a qualified steam fitter.
● Refer to Figure 23 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
shut-off valve. This will enable you to disconnect
the steam connections and service the tumbler
while your laundry facility is in operation.
● Connect the steam solenoid valve to the related
steam coil inlet connection with nipples, flex
hoses, unions and tees.
● Strainers may require cleaning due to materials
from hoses or pipes.
● Install vacuum breaker (optional), 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. Gravity return requires entire return
plumbing be below steam coil outlets.
● Install union and shut-off valve in return line and
make final pipe connections to return header.
NOTE: To prevent water hammering, route return
lines below outlets of steam coils.