CONTAINERIZED SELF SERVICE LAUNDRY (CSSL)
THEORY OF OPERATION
General. The CSSL system is designed for operation in temperate zones above 320 F. It can be operated on a
continuous basis in 20 Hour cycles, provided adequate freshwater supply and wastewater discharge can be sustained
on this basis. Minimum employment requirements for the CSSL are summarized in Work Package 0003 00-5.
CSSL AND TEMPER. The CSSL is housed in a general cargo container (1) modified to accommodate the electrically
operated, cold-water service laundry facility. An 8 ft TEMPER Section (without vestibules) (2), is attached to the
container (1) using a modified end wall (3), that connects to the TEMPER with hook and pile fasteners, and to the
CSSL with a cinch strap at the end of the boot (4). Lines (5) attached to far corner fittings (6) and straps (7) attached
through near corner fittings (8) secure the boot to the container. The double side doors (9) allow access to the rear of
the washers and dryers (10).
Power Distribution System. The CSSL operates on 100 Amp, AC power. A power source, either commercial or
appropriate generator (minimum 30kW), must be connected to the external power entry panel (11) connectors J1 and
J2. Two power distribution panels (12) supply power through the internal GFCI circuit and to external components
through the external GFCI (J3) and 60 AMP (J4) connector on the power entry panel (11).
Washing System. The stacked commercial washer/dryer units, (Maytag Model LSE7806ACE) (10) are mounted to the
CSSL floor and inside wall for stability during operation and shipment. Washing is accomplished using cold water only.
Freshwater. A freshwater source (either municipal or a 3,000 gallon storage tank) is connected to the freshwater input
panel (13) using a 2 diameter water hose (14). A minimum water pressure of 16 PSI is required to operate the
washers. A pre-pressurized diaphragm-type tank (15) regulates the freshwater system pressure, turning on the 30 GPM
freshwater pump (16) when the pressure reaches 20 PSI, and off at 40 PSI. When municipal water of sufficient
pressure is supplied to the CSSL, the 30 GPM freshwater pump is not used. Distribution of freshwater to the washers is
through a ¾ diameter copper line (17). Each individual washer line is controlled with a ball valve (18). The freshwater
system is protected during long-term storage with non-toxic anti-freeze. This anti-freeze is evacuated during the set-up
procedures prior to using the system.
Wastewater. Wastewater generated by the washers (10) is drained through a 3 diameter PVC Pipe (19) into the
wastewater tank (20) located in the rear of the container. When the tank contents reach a pre-set level, a float switch
(21) activates a sump pump (22), that evacuates the contents through the wastewater panel (23) and a 2 diameter
hose (24) into a 3,000 Gallon storage tank or directly into a wastewater disposal system.
Drying System. Dryers (10) are stacked on top of the washers and fastened to the CSSL using a metal frame bolted
to the sidewall of the container. The dryer flexible exhausts (25) are connected to a metal exhaust duct (26) that exits
through the utility wall.