To build a Taco LoadMatch design system, one must: 1. Build the main loop with a boiler or chiller and connect components. 2. Insert imposed loads and connect them to the main loop. 3. Enter load data for each imposed load. 4. Set the main loop fluid temperature and flow rate.

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Building a Taco LoadMatch® Design system
To build a Taco LoadMatch® Design system, follow these steps:
Step 1: Build the main loop
Insert a generation component (usually a boiler or chiller) and build a main loop by connecting the components
inlet to its outlet. In this example the primary pump serving the main loop is inserted at the beginning. Inserting the
primary pump early may decrease calculation time.
Step 2: Insert Imposed Loads
Turn on the quot;Taco LoadMatch® option in the Project Properties dialog.
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Insert an Imposed Load (or other load type). Connect to the supply side of the main loop first. Connect the
Imposed load input to the primary loop second (short-cut). Piping displayed black in the example below will
remain black until the system is complete (load data is entered).
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Step 3: Enter load data
Enter a numerical load value for each imposed load (automatically calculated for airside load components). Load
information is usually obtained from a load program such as CHVAC (www.elitesoft.com). Double left-click on
each Imposed Load and enter a load for the appropriate season. For information regarding speeding up data
entry see the help topic, simultaneous data entry.
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Step 4: Set the main loop fluid temperature
Set the main loop fluid temperature and flow rate. Double-click the generation component, choose the quot;Fluidquot; tab
and set both the entering and leaving temperatures. Altering the leaving temperature will set the flow in the main
loop. Avoid setting the main loop temperature incorrectly.
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Step 5: Set the Imposed Load fluid temperature
Imposed loads may represent a variety of components such as fan coils or terminal units. To closely model a
specific piece of equipment it may be necessary to adjust the fluid temperature change. Because adjustments to
upstream components affect downstream components it is recommend that the user adjust the Imposed Loads
closest to the boiler and then work downstream. Note: It is strongly recommended that the temperature
change option be used instead of adjusting the leaving temperature of each Imposed Load.
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Step 6: Enter head loss data
Enter the head loss data associated with each component in the system. This includes head loss data for
Imposed Loads; usually a single maximum value for all Imposed Loads will suffice.
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For head losses associated with pipes enter the specific pipe. It is not necessary to enter pipe length for every
single pipe in the system rather enter critical pipe length in a single typical location in each loop. By default a
length of 30 feet is automatically entered on the pipe between the pump and the load. This length should suffice
for most systems but should be overridden if required.
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Step 7: Select components
Select equipment that matches the component design criteria.
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The following represents a simple version of a completed Taco LoadMatch® Design:
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Note: Additional example files are available in the example directory.
Step 8: Print out schedules
Once the design is complete schedules of the final equipment selections may be printed. See the Schedule
printing section for more information on this topic.
Some automated tasks included in the Taco LoadMatch® design option are:
The pipe length between the LoadMatch® pump and the load automatically assumes a length of 30 feet to
simulate the total length of pipe in the LoadMatch® circuit.
The LoadMatch® pump automatically assumes as part of its ID the load ID.
Taco LoadMatch® Design option
The Taco LoadMatch® option is enabled by opening the Project Properties dialog (double-left click the white
screen). When enabled, Taco pumps and Taco twin tees are automatically inserted when connecting loads to the
primary loop. Using the this feature assists in the design of Taco LoadMatch® systems.
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Incorrect LoadMatch® example
If leaving temperature of the load and generation are unmatched the system will be incorrect as in the following
example:
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This system unmatched because:
The boiler entering fluid temperature has been forced to 140°F to force a flow in the main loop
The lowest load leaving fluid temperature is 170°F
Results of this mismatch will be:
The main loop piping will be undersized
The main loop pump will be undersized
This system may be corrected by:
Un-checking the boiler leaving fluid temperature box to calculate the minimum system return temperature
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Re-checking the boiler leaving fluid temperature box and set it above the optimum return temperature
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The result is a corrected system:
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The boiler flow has been corrected from 3.7 GPM to 14.8 GPM.
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