Using The Display - Burnham Apex APX399 Installation, Operating And Service Instructions

X. Operation
E. Boiler Sequence Of Operation (continued)

2. Using The Display

The Control includes a touch screen LCD display. The user monitors and adjusts boiler operation by selecting screen
navigation "buttons" and symbols. Navigation features are shown below.
The "Home Screen" and menu selections are shown below. When no selection is made, while viewing any screen, the
display reverts to the "Home Screen" after 4 minutes. The "Home Screen" displays boiler temperature, boiler status and
Efficiency Information. "Energy Save On" indication appears when the outdoor reset or setback features have lowered the
Central Heat Setpoint based on outside air temperature measurement or time of day. "Max Efficiency On" appears when
the boiler return temperature has been reduced low enough to cause energy saving flue gas condensation.
i
Status Boiler 1
Detail
Standby
Help
Energy Save On
Max Efficiency On
Adjust
Home Screen
i
Boiler 1
180 F
Supply
180 F
< Setpoint
0%
Rate
Priority: Central Heat
Status: Standby
Status Screen
i
Boiler 1
Supply 180 F
< Setpoint 180 F
Rate 0%
Priority:
Central Heat
Status: Standby
Status Screens
(see Figure 54)
86
Menu Button
The Home Screen Menu Buttons connect the displays four main display
groups; Status, Detail, Help and Adjustment Screens.
180 F
Close Symbol
The "Close" symbol returns to the display to previous menu or screen.
Repeatedly pressing the "Close" symbol will always return the display to the
"Home" screen.
Active
Fault Arrow Symbol
>
The "Arrow" symbol links together all screens in the selected group. For
example, repeated pressing the right "Arrow" symbol will rotate the display
around all the screens in the Status group. Using this feature the user can
review all the boiler status and adjustment mode screens.
Fault Symbols
"Active Fault" and "Rate Limit" symbols provide a link to the cause of a boiler
fault or firing rate limit. The first boiler status screen provides an overview of
boiler operation including fault status.
Information Symbol
"Information" symbol links most screens to screen content explanations. New
terminology used in status and adjustment screens are explained in plain words.
Central Heat
>
Domestic
Hot Water
Detail Menu
(see Figure 55)
i
Active Faults
Lockout
History
Outdoor
Service
Reset Curve
Contract
Help Menu
(see Figure 60)
Home Screen
i
Status
Detail
Standby
Help
Energy Save On
Max Efficiency On
Adjust
Warning! Only Qualified Technicians
Should Adjust Controls, Contact Your
Qualified Heating Professional
Sequencer
Improper settings or service create risk of
Setup
property damage, injury, or death.
Boiler Size
Service Contact
Setup
Adjust Mode Screens
(see Figure 56)
Boiler 1
180 F
Adjust