Mini-MOD & Mini-Extension Installation Manual
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059040-00 C
MInI-Mod overvIeW
sequences up to 4 fully ModulatIng stages.
The Mini-MOD is the perfect control whenever multiple fully modulating stages are required for hydronic heating applications. The
Mini-MOD controls the on/off and the modulation of each stage to maintain precise system set point control.
pId type logIc
The Mini-MOD’s control algorithms allow it to look at the rate of change in the system. If the system temperature is changing quickly,
the Mini-MOD will react quickly to adjust the modulating stages’ output. If the system temperature changes slowly, the Mini-MOD will
make slow and gradual output adjustments. Therefore, the Mini-MOD adapts to specific system requirements and minimizes fluctuations
around the set point.
controls 0-5 v, 0-10 v, 1-5v, 2-10v, or 4-20 Ma ModulatIng Motors
The Mini-MOD is designed to accurately control the output from 0 to 100% of modulation for each of these different types of motors.
One Mini-MOD can even control a variety of the above different motors.
only one sensor
When Set Point sensor type is selected, the Mini-MOD requires only one sensor located in the common output header of all stages.
However, when Reset is selected, an additional Outdoor Sensor is required for Outdoor Reset Ratio input.
dIgItal dIsplay of all systeM settIngs
The Mini-MOD’s alphanumeric digital display names each system parameter in simple English and shows its precise value. The easy
to follow menu system allows users to quickly make changes to any system setting without having to learn any specialized codes or
keyboard commands.
autoMatIc rotatIon aMong stages
Rotating the first stage to be activated on a call for output promotes even wear on each stage. The Mini-MOD has three modes of rotation:
Manual, Last On, or Time. The Time rotates the lead stage every selected time period from every hour to every 60 days.
outdoor reset
The Mini-MOD has a hydronic outdoor temperature reset function. This allows the Mini-MOD to change the set point based on outdoor
temperature. Furthermore, additional settings have been added to fine tune this operation, like Offset, Minimum, and Maximum Water
Temperature and night setback schedule.
standby boIlers
Each of the Mini-MOD stages can be configured as a Standby boiler with an adjustable Standby delay. A boiler can be used as a backup
during extended large demand periods.
systeM output
In Set Point mode, this output can be used to activate a system pump, combustion air damper, or perform any other function that is required
when any stage is active. In Outdoor Reset mode, the System Output will activate whenever the outdoor temperature is below the Outdoor
Cutoff setting. A System Prove input checks the status of components activated by the System output before stages can be activated.
stagIng (norMal) or parallel ModulatIon
The Mini-MOD can stage boilers as needed. That will allow it to increase the modulation on the lead boiler. When the lead boiler reaches
its modulation start point adjustment and does not satisfy the load, the Mini-MOD will start the next boiler and so on... Moreover, the
Mini-MOD allows for a parallel mode that can modulate several boilers together as a one large boiler. This mode is useful for boilers
with lower water content, which are usually more efficient at lower firing points.
add up to 16 boIler stage (optIonal)
As a stand-alone, the Mini-MOD is designed to control four modulating boilers. However, it has the capability of expanding its control
to two extension panels each with six boiler stages. Thus, the Mini-MOD can control a total of up to 16 boiler stages.
