Alliance Laundry Systems 70269701R4 User Manual

57

70269701

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Obtain specific steam service pipe sizes from the 
steam system supplier or a qualified steam fitter.

●

Refer to Figure 15 for proper steam pipe 
configurations.

●

To prevent condensate draining from headers to 
tumbler, piping should have a minimum 12 inch 
rise (305 mm) 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 tee.

●

Strainers may require cleaning due to materials 
from hoses or pipes.

●

Install bucket trap with built-in strainer and 
check valve. A vacuum breaker is optional. 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 
optional vacuum breaker and check valve in 
return line near tumbler. Gravity return requires 
entire return plumbing be below steam coil 
outlet.

●

Install union and shut-off valve in return line and 
make final pipe connections to return header.

●

Trap each steam coil individually. Always keep 
the trap clean and in good working condition. 
Refer to Table 14 for Trap Sizing. 

●

When tumbler is on the end of a line of 
equipment, extend header at least 4 feet 
(1.2 meters) beyond tumbler. Install shut-off 
valve, union, check valve and bypass trap at end 
of line. If gravity return to boiler, omit trap.

●

Insulate steam supply and return line for safety of 
operator and safety while servicing tumbler.

●

Keep tumbler in good working condition. Repair 
or replace any worn or defective parts.

Table 14 

4

120

2

105

4

105

2

95

4

140

2

120

W480