ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0002 00
DESCRIPTION AND THEORY OF OPERATION
EQUIPMENT DESCRIPTION AND DATA
Cold Weather Kit
The Cold Weather Kit is employed during cold weather operations (temperatures below 32 F to -25 F) to
prevent water in the TWPS from freezing. The Cold Weather Kit is provided with the A-TWPS or as an
extended capability module for the MC-TWPS. The following components are provided with both the A-
TWPS and the Cold Weather Kit for the MC-TWPS (see Figure 33):
Diesel-Fuel Fired Forced Hot Air Space Heater. Produces heat to heat the enclosed TWPS.
General Purpose Transformer. Provides the power required to run the electrical components of
the diesel fuel-fired forced hot air space heater. The transformer is hung over the TWPS frame
next to the eye-wash station and is plugged into the right side of the PDP.
12-in. x 20-ft. Duct. Delivers warm air from the heater to the TWPS and returns cold air from the
TPWS to the heater.
Main Plenum. Distributes warm air from supply duct from heater to 3 locations on the TWPS.
Two 8-in. x 6-ft. Ducts. Deliver warm air from the main plenum to the operator station and the
compressor areas of the TWPS.
Right Plenum. A heat register that distributes the warm air from the second 8-in. x 6-ft. duct to
the compressor area of the TWPS.
Two Right Plenum Hanging Straps. Hang the right plenum above the air compressor motor.
The TWPS is provided with the straps installed and are left in place.
4-in. x 5-ft 8-in. Duct. Connects to the right side of the right plenum and delivers warm air from
the right plenum to the lower right end of the RO vessels and MF Assembly.
Pump Insulating Platforms. Placed under the raw water, MF, and distribution pump skids to
insulate the pumps/motors/engines from the ground.
24V DC Starting Cable. Connects the TQG battery terminals to an electric starter on the diesel-
driven pump skid. Used to start the diesel-driven pump in cold weather. Stays with the TWPS
and is stored in Box #1 when not in use.
Pump Heating Collars. Wrap around a pump. Contain electric heat trace that provides enough
heat to prevent water from freezing in the pump.
Pump Insulating Covers. Enclose the pump skids. Insulate and protect the pump skid
components from the weather.
Diesel Engine Exhaust Hose. Metal hose that directs diesel-driven pump engine exhaust
through a fitting in the pump's insulating cover.
Adaptor A-02 Heating Blanket. Insulating blanket that is wrapped around Adaptor A-02
(Adaptor A-02 is used for priming the first raw water pump.) The blanket contains electric heat
trace that provides enough heat to prevent water from freezing in the adaptor.
Hose Heating Blankets. Insulating blankets that are wrapped around raw water and distribution
hoses. Contain electric heat trace that provides enough heat to prevent water from freezing in
the hoses
P-1 Pump Power Cable. Delivers electricity from the PDP to the P-1 pump skid to power
Adaptor A-02 and hose heating blankets.
Ice Hole Auger and Handle. Used to drill a hole in the ice to access frozen raw water source.
A-02 Collar. Wraps around the discharge of adaptor A-02. Insulates the adaptor discharge.
Ice Intake Strainer. Inserted with suction hoses through a hole in an iced-over water source.
Used in place of the floating inlet strainer.
Heat Gun. Electric heat gun used to blow hot air on hoses, pumps, or other components that
may have iced up.
100-ft. Extension Cord. Used with the heat gun to reach components that are off the main skid.
0002 00-29
