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20
Heat-Timer Corp.
• When Shutdown or Tstat is selected, the Day/Night Schedules will be available in the operating menu. See "Shutdown/Tstat/
Setback Mode" on page 19. Terminals 31 and 32 will function as a Shutdown (Turn off boilers when shorted) or as a Tstat (Turn off
boilers when opened). However, a call for DHW will bring the boilers on.
• When Setback is selected, the External Signal option will switch the Mini-MOD-CNC to Setback mode when terminals 31 and 32
are shorted. This allows an external device or control to provide the setback signal. No scheduling or boost menu options will be
available with Setback.
Boost Mode
(noT availaBle wiTh exTernal seTBack inPuT)
30 Minutes, Disabled
Button: MENU/<System Startup>/..../Boost Mode
• The morning Boost is designed to return the building to comfortable ambient temperatures
after the cooler Night (Setback) period. The Mini-MOD-CNC will accomplish this
by running elevated water temperatures (will add Setback setting to calculated water
temperature) for 30 minutes before the start of the Day schedule setting. That is, if the
normal day set point at a specific outdoor was 145˚F and the Setback setting was 20˚F, the
boost will raise the system calculated temperature to 165˚F for 30 minutes before the start of
the Day Schedule setting.
• If no Boost is needed, then simply select Disabled from the Boost Menu.
• Boost is only available if Shutdown or Tstat is selected as an option. See "Shutdown/Tstat/
Setback Mode" on page 19.
sensor fault
All Off, All On
Button: MENU/<System Startup>/..../Sensor Fault
• The Sensor Fault will determine the operating status of all output stages that has their Mode
set to Auto when a sensor reads Short or Open.
• When All-On is selected, the Mini-MOD-CNC will turn all boilers On to 100% when
the System reads Short or Open and the outdoor temperature is below Outdoor Cutoff.
However, when the Outdoor reads Short or Open, the Mini-MOD-CNC will try to maintain
the Maximum Water Temperature.
• When All-Off is selected, the Mini-MOD-CNC will turn all boilers Off when either the
System or the Outdoor sensor reads Short or Open. However, when the Outdoor reads Short
or Open, the Mini-MOD-CNC will try to maintain the Minimum Water Temperature.
A good practice after performing any Startup menu modification is to
check all operating settings and adjustments to match the new settings.
settIng tHe control to factory defaults
To Reset the Mini-MOD-CNC control to its original factory defaults, power down the
control. Hold down the two right most buttons while powering the control back up until the
Total Clear Started screen appears. The Display will direct you to the Startup
menu to program the control after the defaults are loaded.
NOTE: When resetting the control to original factory defaults all control settings will be overwritten and will no longer exist.
Do not turn off power to control until all Startup settings have been made. Otherwise, the next
power-up will be set to many Startup factory settings that might not fit your application.
alert
alert
Default: 30 Minutes
Default: All On
--- BOOST MODE ---
30 Minutes
Disable
▲
▼
BACK
SAVE
--- SENSOR FAULT ---
All Off
All On
▲
▼
BACK
SAVE
TOTAL CLEAR STARTED
Release buttons
and
Please Wait
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