ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
COLD WEATHER SYSTEM
h. Block off light completely by covering the open end of the photocell. Within 10 seconds
the resistance indicated should be high.
i. Replace the photocell with a new photocell if there is no change in resistance during this
procedure.
PHOTOCELL
PHOTOCELL BRACKET
LEADS
BURNER HEAD
TEST LEADS
Figure 9. Diesel Heater Photocell Test Set-Up.
2. Install a new photocell, or reinstall the existing photocell as follows:
a. Connect the blue and white leads of the new or existing photocell to the tagged wires.
b. Gently reinsert the photocell all the way in to its holding bracket.
c. Close the access panel.
d. Close and snap the top cover.
Diesel Heater Safety Control Assembly Testing/Replacement:
Part:
Diesel heater safety control assembly (TM 10-610-309-24P)
Tool:
Equipment condition:
Diesel heater OFF and power cord disconnected from source and from heater
Test and, if necessary, replace the diesel heater safety control assembly when the diesel heater will not
start.
Test the diesel heater safety control assembly as follows (see Figure 10):
WARNING
Electrical hazard. Before working on the safety control, be sure the heater power
switch is OFF and the power cord is unplugged from the power source and the
heater. Then, when power is required, be extremely careful not to let any part of
your person touch the spark plug, bare wires, leads, or terminals. Failure to
observe this warning may result in serious injury from electrical shock.
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