A.O. Smith ATX-199 Instruction Manual page 63

10.
Storage Tank (page 49).
11.
12.
DRAIN VALVE
Features and Components (page
7)
RELIEF VALVE TESTS
Figure 61
Water heating unit Maintenance and Service
(page 61)
Connections (page 44) Water Piping Diagrams (page
66)
TEMPERATURE-PRESSURE
RELIEF VALVE
DISCHARGE PIPE
Figure 61. Operating the Relief Valve Lever
Filling The Water Heater
Burn hazard.
Hot water discharge.
Keep clear of Temperature-
Pressure Relief Valve
discharge outlet.
Water Line
NOTE:
Expansion (page 15)
(page 15)
Do not plug the Temperature-Pressure Relief Valve
opening. This can cause property damage, serious
injury or death.
VENT SYSTEM MAINTENANCE
1.
2.
NOTE:
3.
63
Thermal
Closed Water Systems
Explosion Hazard
Temperature-Pressure Relief Valve
must comply with ANSI Z21.22-
CSA 4.4 and ASME code.
Properly sized temperature-
pressure relief valve must be
installed in opening provided.
Can result in overheating and
excessive tank pressure.
Can cause serious injury or death.