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8
Heat-Timer Corp.
Make sure you Have tHe rIgHt control
If you need the Mini-MOD-CNC to do additional tasks that either are not listed or do not know how to configure them, contact Heat-
Timer Corp. Sales Department either by Phone (973)575-4004, Fax (973) 575-4052, or by E-mail support@Heat-Timer.com.
Setting an Initial Program will ease the configuration of the Mini-MOD-CNC and will give the opportunity to utilize many of the energy
saving features and give more comfortable heat when needed.
The program should consist of the following:
• Selecting the features that your system can utilize.
• Installation: Install the Control, switches and sensors. See "Installation" on page 9
• Setting the System Startup. See "Startup Settings" on page 16
• Setting the System Operating Settings. See "Operating Settings" on page 22
• Setting the Stages. See "Operating Modulating Boiler Settings" on page 26 and "Operating Staging Boiler Settings" on page 27
• Adjusting Reset Ratio and Water Offset (In Reset Mode Only). See "Reset Ratio" on page 22
selectIng tHe systeM features
The Mini-MOD-CNC has been designed with Hydronic building heating, using both condensing and non-condensing boilers, as the
primary purpose. With this in mind, many of the Mini-MOD-CNC features can be utilized to ease, enhance, and improve your system
performance. Some of these features are listed in this section.
nuMBer of stages for eacH group of BoIlers
• The Mini-MOD-CNC can be configured to control up to 4 condensing and non-condensing boilers. It can control up to 16 boiler
stages using a maximum of two Mini-Extension Panels (HT# 926712-00).
ModulatIon Mode
• The Mini-MOD-CNC can stage modulating boilers using one of two methods. Normal Modulation Mode, allows it to increase the
modulation of the lead boiler. When the lead boiler reaches its Modulation Start point adjustment and does not satisfy the load, the
Mini-MOD-CNC will start the next boiler and so on. This mode targets boilers that can run more efficient at higher modulation rates.
• The Parallel Modulation Mode can modulate several boilers together as one large boiler. This mode is useful for boilers that are
more efficient at lower firing rate as in many condensing boilers.
ModulatIng sIgnal
• The Mini-MOD-CNC is designed to accurately control the modulation output from 0 to 100% for either current (4-20mA) or voltage
(0-5V, 0-1V, 1-5V, 2-10V) motors. A single Mini-MOD-CNC can control a combination of the above modulation motors.
autoMatIc rotatIon aMong BoIlers
• Rotating the first burner to be activated on a call for output promotes even wear on all burners. The Mini-MOD-CNC has three modes
of rotation: Manual, Last-ON, or Time; automatically rotating every selected time period from every hour to every 60 days.
setBack or day/nIgHt scHedulIng
Two Setback modes are available for the Mini-MOD-CNC:
• The Day/Night Scheduling provides an adjustable time-based schedule for the Setback (only available when Shutdown or Tstat is
selected as the Setback/Shutdown Startup option). See "Shutdown/Tstat/Setback Mode" on page 19.
• The Setback mode uses an external signal to switch the operation of the Mini-MOD-CNC in and out of setback mode.
systeM run-on
• This feature lets the Mini-MOD-CNC run the SYS relay for a longer period after the boilers have been turned off. When this relay is
used to control a pump, it helps in dissipating the excess heat from the boilers combustion chamber.
InItIal setup
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