Mini-MOD & Mini-Extension Installation Manual 25
059040-00 C
avoIdIng conflIctIng boIler lIMIts
• The temperature limits set on the boilers MUST be set considerably higher than the Mini-
MOD’s Set Point for the reasons detailed below.
• The Mini-MOD sensor is located in a common header some distance from the boilers.
• As the temperature rises in the header and before reaching the sensor location, energy is
dissipated. Therefore, the temperature in the header could be lower than that registered by
boiler sensors.
• In addition to the normal drop experienced between the boiler’s temperature and that
read by the Mini-MOD sensor, the Last Stage Hold setting must be accounted for. The
boiler limit must be set above the Set Point PLUS the Last Stage Hold PLUS the normal
drop experienced in the piping.
• Using the previous example of a 10°F Last Stage Hold with a 160°F Set Point, the boilers’
limits must be set enough over 170°F to prevent the boilers’ internal limits being reached. In
this situation, the boiler high limit should be set at approximately 180°F or higher to prevent
the difference in boiler temperature vs. header temperature causing erratic operation.
WarnIng
The temperature limits set on
the boilers must be higher than
the Mini-MOD Set Point. Read
the section at left for details
that will prevent erratic system
operation.
day/nIgHt scHedules
(available when "shutdown or Tstat" is selected from the shutdown/Tstat/
setback startup menu option only)
Button:
MENU/<System Settings>/<More Settings>/Day/Night Schedules
• The Mini-MOD has two levels of heat. The Day (Normal) level is used when a building is
occupied and people are active.
• The Night (Setback) level is used when a building is not occupied, or when people are
sleeping. This setting reduces the calculated temperature by the Setback setting. See
"Setback" on page 24. If the Day calculated water temperature was 150˚F and the Setback
was 20˚F, the Night Schedule will run at (150˚F - 20˚F) = 130˚F.
• If the Boost feature is being used, it uses the Day Schedule as a Boost ending point. That
is, if the Day Schedule is set to start at 6:00AM, the Boost will start 30 minutes prior to the
Day setting at 5:30AM. The Mini-MOD will then raise the calculated water temperature by
the Setback amount. Using the previous example, at 5:30AM the Mini-MOD will raise the
calculated water to 170˚F (150˚F + 20˚F) until 6:00AM.
DAY/NIGHT SCHEDULES
Set Time
**:**
Day Schedule **:**
Night Schedule
**:**
BACK
▲
▼
SELECT
set tIMe
Button:
MENU/<System Settings>/<More Settings>/Set Time
Button:
MENU/<System Settings>/<More Settings>/<Day/Night Schedules>/Set Time
• Adjust the time by selecting Time from the menu and then scrolling through the hours then
select Save. Then, scroll through the minutes then select Save. If the hours are to be set to
PM, scroll through the AM hours to reach the PM hours.
-SET PRESENT TIME-
11:**Pm
BACK
▲
▼
SAVE
alert
Remember that the battery is the backup for the Time. If no power is supplied to
the Mini-MOD and there was no battery or battery had no power, time values will
be lost and will need to be reset.
