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Steam Requirements
NOTE: Machines require a constant 80 to 100 psig
(5.3 to 6.9 bar) steam service for optimum operation.
The maximum allowable steam pressure for use with
50 Hertz tumble dryers 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 27 for proper steam pipe configurations.
•
To prevent condensate draining from headers to tumble
dryer, 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 tumble dryer. 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.
Part No. 70476301ENR6
Steam Requirements
©
Published by permission of the copyright owner - DO NOT COPY or TRANSMIT
This will enable you to disconnect the steam connections
and service the tumble dryer 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 tumble
dryer, install trap 18 inches (457 mm) below coil and as
near to the tumble dryer 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 tumble dryer. 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.
Steam Requirements
83
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