Takagi T-K3 - Page 61

T-K3 Service Manual
Ver. 1.05
61
CONFI DENTIAL
To sum it up in a chart:
5 minutes have
elapsed since prior
operation?
Inlet ther mistor
temperature
Outlet ther mistor
temperature
Will automatic firing
be activated?
No Any Any NO
Yes Above 39°F Any NO
Yes Any Above 50°F NO
Yes 39°F and below 50°F and below YES
Yes Any 37°F and below YES
Outdoor installation:
After 25 minutes have elapsed since the T-K3’s previous firing operation, the computer w ill
continually check the temperatures of the inlet and outlet ther mistors. The automatic firing
system w ill not activate at all un less these 25 minutes have elapsed.
When the comput er checks for these temperatures, the freeze protection firing system w ill
activate if:
T
in
≤ 37°F and T
out
≤ 43°F OR T
out
≤ 37°F
where T
in
is the temperature of inlet thermistor and T
out
is the temperature of the outlet ther mistor.
To sum it up in a chart:
25 minutes have
elapsed since prior
operation?
Inlet ther mistor
temperature
Outlet ther mistor
temperature
Will automatic firing
be activated?
No Any Any NO
Yes Above 37°F Any NO
Yes Any Above 43°F NO
Yes 37°F and below 43°F and below YES
Yes Any 37°F and below YES