TECHNICAL SERVICE DEPARTMENT
Technical Service Bulletin
1-800-432-8373
How to Replace the Thermal Release Device (TRD)
Rheem Guardian System
Technical Competence, Product Confidence
Page 4 of 4
1446 How to Replace the Thermal Release Device (TRD).docx
10. Reconnect the pilot supply tube, thermocouple, and main
gas supply tube. Reconnect the piezo ignitor striker wire.
11. Turn on gas and gas valve. Relight the pilot per the
lighting instructions. Turn temperature up high enough to
light the main burner. Allow main burner to burn for 10
minutes to ensure air shut off plate is open.
12. Reset thermostat to safe setting. Rheem recommends no
hotter than 120 degrees.
13. Replace jacket door to combustion chamber.
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