TM 10--3510--221--24
0267 00--1
HEATER RELIEF VALVE REPLACEMENT
0267 00
THIS WORK PACKAGE COVERS:
Removal, Installation
INITIAL SETUP:
Maintenance Level
Materials/Parts
Direct Support
Rag, Wiping (Item 4, WP 0271 00)
Sealant, Pipe Thread (Item 8, 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. Place wiping rag around relief valve port on heater manifold (3).
3. Disconnect union (4) and remove vent piping (5).
4. Unthread relief valve (6) from heater manifold (3).
5. Unthread nipple (7) from relief valve (6).
6. Clean pipe sealant and residual thermal fluid off of threads of heater piping (3) and nipple (7).
