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 (d)  Remove electrical power, if it is not necessary.
 (2)  S 434-018Install insulation on the water lines, if applicable.
 (3)  S 214-019Make sure the insulation blankets will always be more than one inch (2.54 cm) from the heater tapes.
 (4)  S 414-020Install the floor or wall panels, if applicable.

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757 MAINTENANCE MANUAL
 HEATER TAPE THERMOSTATS - REMOVAL/INSTALLATION
______________________________________________
 1.  General_______
 A.  This procedure contains two tasks. The first task is the removal of the heater tape thermostats. The second task is the installation of the heater tape thermostats.
 TASK 30-71-02-004-001
 2.  Remove the Thermostat (Fig. 401)_____________________
 A.  Procedure
 S 864-003
 (1)  Open the applicable circuit breakers on the right miscellaneous relay panel, P37, or the APU external power panel, P34(B), and attach DO-NOT-CLOSE tags (see table).
LOCKING NUT

Usual Heater Tape Thermostat Installation
Figure 401

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757
MAINTENANCE MANUAL

 ~..................................................................... | THERMOSTAT | HEATERS CONTROLLED | CIRCUIT BREAKER | ....................................................................... | B85 | B107, B117 | 37F5, HEATERS DRAIN LINE BLANKET| | | | or | | | | HEATERS WATERLINE FWD | ....................................................................... | B103 | B109, B111, | 37E1, DRAIN LINE HEATER | | | B113, B116 | or | | | | AFT WATERLINE HEATERS | ....................................................................... | B10105 | B109, B111, | 37E1, DRAIN LINE HEATER | | | B113, B116 | or | | | | AFT WATERLINE HEATERS | ....................................................................... | B10134 | B10135 | 37F5, HEATERS WATERLINE FWD | ....................................................................... | B10064 | B10063 | 34B3(B), DRAIN MAST HTR GND | | | | 37F7, HEATERS DRAIN MST AIR | 2............….....................…..................................1
 S 014-006
 (2)  
Remove the floor or wall panels, if applicable, to get access to the thermostat.
　
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