Steam Requirements

NOTE: 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 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.

NOTE: To prevent water hammering, route return lines below outlets of steam coils.

Piping Recommendations

●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.

WARNING

All system components must have a 125 psig (10 bar) working pressure. Shut-off valves must be installed upstream of the steam solenoid valve and downstream of each steam trap so components can be isolated for maintenance or emergency purposes.

All components (solenoid valve, traps) must be supported to minimize loads on the tumbler steam coil connections.

 

 

W480

 

 

 

 

 

 

Steam Trap Sizing

 

 

 

Tumbler

Number of

Steam Trap Size

Model

Coil Rating

(lb/hr Condensate)

 

 

 

25, 30

4

120

 

 

Pound

2

105

 

 

 

 

T30

4

105

 

 

2

95

 

 

 

 

35 Pound

4

140

 

 

2

120

 

 

 

 

Table 14

70269701

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