Steam Requirements

Obtain specific steam service pipe sizes from 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 (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, inverted 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.

Piping Recommendations

●Trap each steam coil individually. Always keep the trap clean and in good working condition.

●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 lines for safety of operator and safety while servicing tumbler.

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

Machines require a (constant) 80 to 100 psig (pounds per square inch gauge) (5.62 to 7.03 kg/sq. cm) steam service for optimum operation.

WARNING

All system components must have a 125 psig (10 bar) working pressure. Shut-off gate 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.

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