Display; Configuration; Display Boiler Modulation Status; Display Messages - heat-timer Mini-Extension Installation And Operations

CONFIGURATION
Button: MENU/<Maintenance>/<Configuration>
• This menu option provides a consolidated view of the Startup settings the Mini-MOD
has been set to.
• Additional stage settings will be available by selecting the NEXT option.

DISPLAY

The Mini-MOD display layout provides a variety of information that gives an immediate
picture of the operation status. The display shows four boilers at a time. The two middle
buttons scrolls the screen to view additional boilers. Moreover, all the information is brightly
displayed. It can be viewed in brightly or dimly lit rooms.
• The buttons' functionality changes based on the screen and menu level your in. 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.

DISPLAY BOILER MODULATION STATUS

The Mini-MOD boiler modulation status gives immediate access to each boiler status. The following list show all possible boiler
status:
• --- Boiler is off due to no call for heat.
• 97% Boiler is modulating at the indicated percentage.
• ON Boiler Stage Mode is set to ON and boiler is firing at 100% (boiler is in bypass).
• OFF Boiler Stage Mode is set to OFF and boiler stage is unavailable or boiler does not exist.
• m95% Boiler Stage Mode is set to Manual and set to the specified percent.
• C/E Boiler on Extension panel is communicating back to the Mini-MOD..

DISPLAY MESSAGES

The Mini-MOD normal display layout reserved the second line for message indications. The following is a list of the most common
Message Display Line information:
• Summer
• Shutdown Active
• Shutdown by EMS
• DHW Call (171˚F)
• Purge Delay: 23
• Holding Until 150˚F
• System Run-On: 46
• Waiting for Prove
• Prove Failure
The control is set to Summer. No heat is active.
The Shutdown Terminals are Shorted. No boilers will be active.
The EMS is below 2mA or above 22mA
There is a DHW (Domestic Hot Water) call. The Mini-MOD will Raise system Set Point to the
indicated temperature. DHW increases calculated temperature to 200˚F or Max Water Temperature,
whichever is lower.
The current boiler is in purge cycle and the remaining purge time in seconds is 23.
The Lead boiler is in Last Stage Hold. This example shows that the lead stage will turn off when
system temperature reaches 150˚F.
The System relay is ON for the System Run-On Delay. This example shows that it will remain in
System Run-On for an additional 46 seconds before turning off.
The System relay is ON and the prove terminals are open before the lead boiler relay can energize.
After boilers have run for a while, Prove signal was opened. The boiler relays will de-energize.
However, the System relay will remain energized.
Mini-MOD & Mini-Extension Installation Manual
35
OD= F
Prepurge Delay:67
A B
50% 15%
STAGE
-- --- - CO NFI GUR ATIO N 1 - --- --
v1 .00 c
Re set F
No rma l
Da y/Ni ght Sch edul es
A ll O ff
BAC K
--- --- CON FIG URAT ION 2 -- --- -
A= 4-20 ma
C=0 -5v
B ACK
98
F
SYS=
C D
--- - --
MENU
23
NE XT
B =0- 10v
D =2- 10v
EXIT