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TWO COMBUSTION SECTIONS WITHIN THE T-M50
The T-M50 contains two combustion sections. The section that turns on first is whichever
section the T-M50 decides is the primary section. The moment at which the secondary section
fires will depend on the total flow rate and set temperature of the water heater:
Flow rate at which the secondary section fires
( GPM )
T-M50 set temperature
(°F)
3.2 100-120
2.9 125,130
2.6 140
2.4 145,150
2.1 155-185
Example:
If the set temperature is 120
ºF:
＊
The section(s) in operation is indicated by the black square(s).
Right combustion section
＊
The primary and secondary section will reverse roles every 100 firing cycles or every 12 hours of unit operation.
Left combustion section
or
T-M50 T-M50
T-M50 T-M50
Depending on which side is the primary section
Total Flow < 0.5 GPM
(no section turns on)
0.5 GPM
≦
Total Flow < 3.2
GPM
(primary section fires only)
3.2 GPM < Total Flow
(both primary and
secondary sections fire)
