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240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
12-8. (A) ON/OFF conditions: Overview
The following table shows the ON/OFF conditions of the water heater.
*Only if the set temperature is below 115 °F (46 ˚C).
ON / OFF Conditions
Conditions needed
to turn ON.
The BTU requirement is more than 29,800 BTU/h
OR
Inlet water temperature is lower 5.4 °F than the set temperature and
BTU requirement is more than 14,880 BTU/h
AND
The water flow rate is more than 0.5 GPM
OR
The water flow rate is more than 0.8 GPM (Only 135 °F (57 °C))
Conditions needed
to turn OFF.
The BTU requirement is lower than 11,900 BTU/h
AND
*Inlet temperature is higher than the temperature that is -18 °F below
the set temperature.
OR
Inlet temperature is higher than the set temperature
OR
Heat exchnager temperature is over 194 °F
OR
The water flow rate is less than 0.4 GPM
OR
The water flow rate is less than 0.5 GPM (Only 135 °F (57 °C))
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