TM 10--3510--221--24
0175 00--1
HEATER THERMOCOUPLE REPLACEMENT
0175 00
THIS WORK PACKAGE COVERS:
Removal, Installation
INITIAL SETUP:
Maintenance Level
Materials/Parts
Unit
Rag, Wiping (Item 4, WP 0271 00)
Sealant, Pipe Thread (Item 8, WP 0271 00)
Tags (Item 9, WP 0271 00)
Tools and Special Tools
Equipment Conditions
Tool Kit, General Mechanics (Item 1, WP 0272 00)
LADS power shut off at main control
enclosure (WP 0112 00).
REMOVAL
WARNING
Thermal fluid can reach temperatures near 400o F when the heating system is operating.
Allow thermal fluid and heating system piping to cool prior to performing maintenance.
Always wear gloves and eye protection. Failure to follow this precaution could result in
severe burn injuries.
1. Close isolation valves (1 and 2).
2. Loosen four latches (3), then open door (4) on heater enclosure (5).
3. Tag and disconnect leadwires of thermocouple (6) from terminal board (7).
4. Remove two screws (8) then remove cover (9) and gasket (10) from outlet body (11).
5. Remove two screws (12) then remove cover (13) and gasket (14) from pulling elbow (15).
6. Pull lead wires of thermocouple (6) out of outlet body (11) and pulling elbow (15).
7. Separate conduit union (16) then unthread nipple (17) from pulling elbow (15).
8. Place a wiping rag around heater piping (18) where thermocouple (6) is installed.
9. Unthread thermocouple (6) from heater piping (18).
10. Unthread pulling elbow (15) from thermocouple (6).
11 Clean pipe sealant off of threads of heater piping (18).
