Primary menu item descriptions – AERCO KC1000 Heater w/Mod-Box Controller User Manual
Page 59

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 related to the input
BTU’s of the unit. For instance a 50%
signal equals approximately 500,000
BTU gas input while a 75 % signal
equals approximately 750,000 BTU
gas input and so on.
Setpoint is the desired outlet water
temperature that is to be maintained
by the heater when operating in
automatic mode.
When set to automatic mode the
temperature controller is receiving
and processing 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 the upper display
shows OFF and 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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