ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0044 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR MAINTENANCE PROCEDURES
COLD WEATHER SYSTEM
WARNING
Electrical hazard. Before opening up the top cover of the heater to access the
photocell, be sure the heater switch is OFF and the power cord is unplugged from
the power source and the heater. Failure to observe this warning may result in
injury or death from electrical shock.
1. Make sure the heater switch is OFF.
2. Make sure the heater power cord is unplugged from the power source and from the heater.
3. Open the top cover of the heater by unsnapping the three "screws" at the front of the cover and
lifting the cover.
4. Open the access panel at the top of the heater.
5. Gently pull the photocell out of the bracket that is attached to burner head.
6. Inspect the glass face of the photocell. If dirty, wipe carefully with a clean soft cloth.
7. Gently reinsert the photocell all the way in to its holding bracket.
8. Close the access panel.
9. Close and snap the top cover.
10. Connect the power cord first to the heater and then to the power source.
11. Start the heater.
12. If the heater ignites, but the safety control trips, notify unit maintenance to test/replace the
photocell.
PHOTOCELL
HOLDING BRACKET
Figure 4. Diesel Heater Photocell Removal for Cleaning.
END OF WORK PACKAGE
0044 00-6
