Alliance Laundry Systems T433I User Manual

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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.