Installation 2-11
FlexFit – Linkageless Control – Revision 1.0
PREFERRED
UTILITIES MFG CORPORATION
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Section 2 – Installation
Electrical Noise Suppression ....................................................................... 2-12
General Wiring Requirements ............................................................. 2-12
Ignition Transformer Wiring / Mounting ............................................... 2-12
VSD Wiring .......................................................................................... 2-12
Oxygen Analyzer Wiring ...................................................................... 2-12
Flame Scanner Wiring ......................................................................... 2-12
Installation Warnings and Notes .................................................................. 2-13
Flex Sequence Option ......................................................................... 2-13
Burner Management System (Flame Safeguard) Installation ..................... 2-14
Combustion Control Installation ................................................................... 2-18
Variable Speed Drive Installation .................................................................2-20
Servo Installation .........................................................................................2-21
Servo Description and Operation ........................................................2-21
Servo Control Board ................................................................... 2-22
Travel Limit Switches .................................................................. 2-23
Servo Mechanical Installation ............................................................. 2-24
Servo Wiring ........................................................................................2-24
QD1 Quick Disconnect Cables ...........................................................2-26
Flame Scanner/Relay ...................................................................................2-27
Flame Status .......................................................................................2-27
Flame Relay ........................................................................................2-28
Self-Checking ...................................................................................... 2-28
Flame Scanner Specications ............................................................2-28
Flame Scanner Installation ..................................................................2-28
Flame Scanner Wiring .........................................................................2-29
ZP Oxygen Sensor System Overview .........................................................2-30
Detector ...............................................................................................2-30
Measuring Principle ............................................................................. 2-30
Probe ...................................................................................................2-32
ZP Oxygen Sensor Installation ...........................................................2-32
Oxygen Probe Mounting Location ..............................................2-33
Mounting Oxygen Probe Nipple and Flange ..............................2-33
Check Oxygen Detector Flange Temperature ............................ 2-33
Rotating the Probe to Lower Detector Flange Temperature ......2-34
Oxygen Calibration Gas Tubing .................................................2-34
Oxygen Sensor Wiring ........................................................................2-35
Operation .............................................................................................2-36
Boiler Startup and Shutdown: .....................................................2-36
Insertion into a Hot Stack or Duct: .............................................2-36
Powering Down and Removing a ZP Oxygen Sensor: ..............2-36
Maintenance ........................................................................................2-36
Cleaning the Detector and Probe ...............................................2-36
ZP Oxygen Sensor Calibration ............................................................2-37
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