Commissioning – Servo Setup 3-47
FlexFit – Linkageless Control – Revision 1.0
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The robustness and exibility afforded by the FlexFit is accomplished via a parameter-based setup procedure. The parameters
required to commission a FlexFit can be found below and in "Section 4 – Parameters". Not all parameters will necessarily be used
for each application, and it is up to the commissioning engineer to determine which parameters are required and their correct setting.
Parameters used should match the boiler/burner type, eld devices, and required operating characteristics of the red equipment.
Parameters are modied via the front panel LCD or via the FlexFit Edit program. Parameters are broken down into basic,
advanced, tuning, and optional groups to make it easier to determine which parameters are required and which may be unused for
each application. This is not intended to imply certain parameters are less important than others, and every parameter should be
reviewed and nal values recorded before completing the commissioning process.
At the end of this manual is the "Parameter Documentation Sheet" and "Boiler Operating Data Sheet" which were developed to
assist the commissioning engineer in setting up the FlexFit. The "Parameter Documentation Sheet" documents all parameters, their
default settings, and their valid ranges. We encourage the commissioning engineer to complete the document with known information
well in advance of commissioning as doing so simplies and abbreviates the parameter entry process at the time of commissioning.
The "Boiler Operating Data Sheet" lists servo data points and draft feed forward data points. Additionally, we encourage the
commissioning engineer to complete both documents and save a copy of the FlexFit Edit le prior to leaving the job site to be used
for future reference. Copies of documentation and data sheets may be made as required.
Refer to "Section 4 – Parameters" for a description of each parameter.
FlexFit Edit
FlexFit Edit is a software tool designed to assist the commissioning engineer with the correct setup and commissioning of
a FlexFit. Parameters may be modied via the FlexFit's front panel LCD or via the FlexFit Edit program. Certain actions, such as
entering commission mode or verifying curves may only be accomplished via the front panel LCD, and all parameter settings should
be veried via the front panel LCD prior to placing the FlexFit into operation.
To use FlexFit Edit, install it on a Windows-based computer, and connect the computer to the FlexFit-CC using a USB A to B
cable. To see what is currently on the FlexFit-CC, the parameters can be read from the FlexFit and viewed. Within FlexFit Edit, you
may enter or modify parameters to match the burner conguration. The software can then write the parameters to the FlexFit-CC. After
commissioning, read from the FlexFit, and a digital copy of all parameters and curve values can be saved to a le on the computer.
You may read the parameters from one FlexFit and write them to a different FlexFit for multiple burner applications with similar setups.
Servo Setup
The FlexFit uses 0.1° accuracy servos for very precise fuel/air ratio control. To achieve 0.1° accuracy and ensure the servos are
working correctly, the FlexFit constantly communicates with each servo and monitors the feedback signal from the sealed feedback
potentiometer.
The second step in the commissioning process is to set up and calibrate the servos. Each servo must be stroked for zero &
span, assigned a function and address in the daisy chain, and assigned a direction of travel for zero.
The complete servo set up procedure is outlined in detail in the following pages. Below are the ve simple steps required to
set up and calibrate the servos:
1. Remove jumper J11 and stroke the servo (using the CCW & CW buttons) to set up the minimum and maximum travel limit
switches as they best suit that device.
2. With J11 still removed, press and hold the ZERO button until all 3 push button lights ash. Use the CCW & CW buttons to
set the address (the 1st servo in the data chain is address "0"). Push zero again. Install the J11 jumper.
3. On the LCD, navigate to Main Menu > Setup > Servo Setup > Congure Servos, and name each servo according to its
address and function (e.g. address "0" Gas Valve, address "1" Oil Valve, etc.). Select the appropriate type of servo being
used (SM or UM).
4. In the Servo Setup menu, select Zero Calibration and enable the function. Place the servo in the zero position. Press and
hold ZERO and then press the direction button (CW or CCW) that indicates the direction the servo travels to get to zero.
Disable the zero-calibration function.
5. In the servo menu, select Seek Limits. Select the servo and toggle the START to seek limits. The LCD screen will return to
START when the seek is complete. Record the open and closed degree information on the "Boiler Operating Data Sheet"
for reference when commissioning the FlexFit.
If there are no errors, the servo set up is done.
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