A.O. Smith T-H2-DV User Manual

T-H2-DV/T-H2-OS Service Manual
Ver. 1.01
86
CONFIDENTIAL
To sum it up in a chart:
5 minutes have elapsed
since prior operation?
Inlet thermistor
temperature
Output thermistor
temperature
Will automatic firing be
activated?
No Any Any NO
Yes Above 46°F Any NO
Yes Any Above 37°F NO
Yes Any 37°F and below NO
Yes 46°F and above 37°F and below YES
Ceramic heating blocks
The blocks will only activate based on what the freeze protection thermostat senses. The thermostat is
located on the intake port for T-H2-DV and left side of compter board for T-H2-OS. Electrical power is
required for this feature to operate.
The heating blocks will activate if the thermostat senses a surrounding temperature below 36.5°F.
Once they are on, the heating blocks will only deactivate if surrounding temperatures reach above
46.4°F.

A.O. Smith T-H2-DV Specifications

General

Brand	A.O. Smith
Model	T-H2-DV
Category	Water Heater
Language	English