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10 Operating information (continued)
51
Installation & Operation Manual
Outlet Water Temperature - This is the boiler outlet
temperature.
Inlet Water Temperature - This is the boiler inlet temperature.
System Supply Temperature - This is the water temperature
as measured by the system supply sensor located in the
downstream piping (if connected).
System Return Temperature - This is the water temperature
measured by the system return sensor located in the upstream
piping (if connected).
Outside Air Temperature - This is the outdoor air temperature
(if connected).
DHW Temperature - This is the temperature as measured by
the tank sensor in the hot water storage tank (if connected).
Flue Temperature - Temperature measured by the flue sensor.
Time - The time is displayed in the lower left-hand corner
of the display. Reference the Crest Service Manual for Night
Setback parameters and more information regarding adjusting
the date and time.
Boiler Status button - Pressing this button brings up the Boiler
Status Screen. This screen shows the status of the various
safeties, inputs, and outputs to the control module. Reference
the Boiler Status Screen section in the Crest Service Manual for
more information regarding this screen.
Main Menu button - Pressing this button brings up the Main
Menu Screen. From this screen navigation to nine (9) other
screens is possible. Reference the Main Menu Screen section
on page 52 of this manual for more information regarding this
screen.
Modulation button - Pressing this button brings up the
Modulation Screen. This screen shows overall boiler
modulation, individual fan speeds, and flame currents.
Modulation Percentage - Displays the current boiler firing
rate.
Crest control module
Figure 10-1 Home Screen
The Home Screen displays status, modulation rate, outlet water temperature, inlet water temperature, flue temperature, system
supply temperature, system return temperature, outdoor air temperature, and domestic hot water tank temperature.
The boiler can be started and stopped by pressing the ON/OFF button. The Boiler Status Screen and Main Menu Screen can be
accessed by pressing the appropriate button.
When the ON/OFF switch is turned to the ON position,
the first screen visible on the LCD display will be the Home
Screen. This screen displays the current status of the Crest
boiler. The following items can be viewed or interacted with
on the Home Screen:
On/Off button - Pressing this button allows the boiler to be
placed in either Manual Shutdown Mode or Standby Mode.
Status - This line shows the current operating status of the
Crest boiler and the current set point.