APPENDIX A
i
PRIMARY MENU ITEM DESCRIPTIONS
tout
pct
Setp
Auto
This is the actual outlet water
temperature of the heater. It is
designated by the code (tout).
Percentage of firing rate is a number,
in percent, that is directly related to
the input BTU’s of the unit. For
instance a 50% signal equals a
1,000,000 BTU gas input while a 75 %
signal equals a 1,500,000 BTU gas
input and so on.
Setpoint is the desired outlet water
temperature that is to be maintained
by the boiler when operating in
automatic mode
When set to automatic mode (ON),
the temperature controller receives
and processes inputs from
temperature sensor(s) located
externally or on the unit. The
controller uses these inputs to
automatically decrease or increase
the firing rate to match the load.
In manual mode, (OFF), the controller
no longer automatically controls the
firing rate of the heater. It is up to the
operator who put it into manual mode
to control the outlet temperature and
firing rate.
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