heat-timer Mini-MOD-CNC Installation And Operation Manual page 41

DISPLAY
The Mini-MOD-CNC display layout provides a variety of information that gives an immediate picture of the operation status. The
display shows two boilers at a time. When extensions are present, the two middle buttons (◄ ►) scroll the screen to view additional
boilers. Moreover, all the information displayed can be viewed in brightly or dimly lit rooms.
• The buttons' functionality changes based on the screen and menu level. The buttons' functionality is displayed on a dark
background on the screen bottom line.
(◄ ►) Horizontal arrows are to scroll through the available stages.
•
(◄ ►) Vertical arrows are to scroll through the menu functions when
•
in menus or to change values of settings when in its specific screen.
• The Top line displays the Outdoor and System sensor values.
• The second line displays all messages pertaining to the operation
or status. See "DISPLAY MESSAGES" on page 41.
• The third line will list the boiler stages. Any additional stages can be
scrolled to using the two middle buttons. The lead boiler letter will be
bracketed. See "LEAD BOILER ROTATION" on page 33. The lead boiler in
the lead group will have two sets of brackets.
• The fourth line lists each boiler modulation or sequencing status.
See "Boiler Status".
BOILER STATUS
The Mini-MOD-CNC boiler status gives immediate access to each boiler stages or modulation:
• --- Boiler is off due to no call for heat.
<<A>>
• Unit A is the Lead in the Lead group.
• <C> Unit C is the Lead in the Lag group.
• C/E Mini-Extension panel is NOT communicating back to the Mini-MOD-CNC.
See "CONNECTING TO THE MINI-EXTENSION PANELS" on page 17.
• mON All boiler stages are set to ON.
• mOFF All boiler stages are set to OFF.
DISPLAY MODULATING BOILER STATUS
• 97% Boiler is modulating at the indicated percentage.
• m95% Boiler Stage Mode is set to Manual Modulation to the specified percent. See "MODE" on page 42.
DISPLAY SEQUENCING BOILER STATUS
• AB Two-Stage boiler. The letters represent the stages assigned to that boiler.
• High Boiler highest firing stage is active. The boiler Mode is set to either Auto or Standby.
• Med Boiler Middle stage on a 3-stage boiler is active. The boiler Mode is set to either Auto or Standby.
• Mhigh Boiler Middle High stage on a 4-stage boiler is active. The boiler Mode is set to either Auto or Standby.
Mlow
• Boiler Middle Low stage on a 4-stage boiler is active. The boiler Mode is set to either Auto or Standby.
• Low Boiler lowest firing stage is active. The boiler Mode is set to either Auto or Standby.
059102-00 REV. C
Outdoor Temp
System Temp
OD=55°F
SYS=143°F
Prepurge
Delay 15
<<A>>
B
67% 22%
STAGE MENU
STAGE
17 MAINTENANCE
Message Display Line
Boilers and their
Modulation Status
Button functions
OD=55°F
SYS=143°F
Prepurge
Delay 15
<<A>>
B
22%
67%
MENU
|
HEAT-TIMER CORP. 41