Specications iii
FlexFit – Linkageless Control – Revision 1.0
PREFERRED
UTILITIES MFG CORPORATION
FlexFit 110 Linkageless Control
FlexFit Specications ....................................................................................... vi
Safety Cautions and Warnings ........................................................................vii
Section 1 – Description 1-1
Overview ........................................................................................................1-2
Features .........................................................................................................1-2
Safety Relay ..........................................................................................1-2
Field Selectable Flex Sequence Option ................................................1-3
Servo Checks ........................................................................................1-3
Automatic Fuel SSOV Leak Test ........................................................... 1-3
Lockout and Alarm History .................................................................... 1-3
MAF and PAF Safe Start Checks ..........................................................1-3
High Flue Gas Temperature Shutdown ................................................. 1-3
Fuel Selection and Flexibility .................................................................1-3
FD VSD to VSD Bypass Changeover ...................................................1-3
Pilot Test Hold .......................................................................................1-3
Flame Scanner/Relay ............................................................................ 1-3
Fuel/Air Position "Pacing Logic" ............................................................ 1-3
Tandem Oil/Gas Valve Servo ................................................................1-4
Oxygen Trim ..........................................................................................1-4
Firing Rate Setpoint and Control ...........................................................1-4
Call for Heat ...........................................................................................1-4
Domestic Hot Water Override ...............................................................1-4
Warm Standby Option ...........................................................................1-4
Cold Start WarmUp Cycle Option .........................................................1-4
Integrated Draft Control .........................................................................1-5
RS485 Modulating Lead/Lag Interface .................................................1-5
Burner Management System .........................................................................1-5
Description of BMS Sates .....................................................................1-8
Boot ...............................................................................................1-8
Standby ......................................................................................... 1-8
Safe Start Checks .........................................................................1-8
Prestart .........................................................................................1-8
Purge ............................................................................................1-8
Pilot Trial for Ignition (PTFI) .......................................................... 1-8
Main Trial for Ignition (MTFI) ........................................................1-8
Release to Modulate ............................................................... ...... 1-8
Assured Low Fire Cutout (ALFCO) Option ...................................1-8
Post Purge ....................................................................................1-8
Gas Valve Leak Test Option (Flex Sequence Option Only) .........1-9
Lockout .........................................................................................1-9
Interlock Groups ....................................................................................1-9
Call for Heat .................................................................................. 1-9
Recycling Limits ............................................................................ 1-9
Fuel Select .................................................................................... 1-9
Non-Recycling Limits ....................................................................1-9
Purging .........................................................................................1-9
Ignition ..........................................................................................1-9
False Flame ..................................................................................1-9
Flame Failure ................................................................................1-9
Fuel Valve Proof of Closure Switches (POCS) .............................1-9
Fan Speed ....................................................................................1-9
Combustion Control System ..........................................................................1-9
Parallel Positioning ..................................................................... 1-10
Section 2 – Installation 2-11
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
Section 3 – Operation &
Commissioning 3-39
Initial Steps .................................................................................................. 3-40
Operating the FlexFit ................................................................................... 3-40
Button Functions ................................................................................ 3-40
LCD Screen Indicators ........................................................................3-41
Alarm and Event Log ...........................................................................3-41
Menu Tree ................................................................................................... 3-42
Main Menu Functions .................................................................................. 3-45
Entering and Navigating the Main Menu ............................................ 3-45
Lockout Data ...................................................................................... 3-45
Passwords .......................................................................................... 3-45
Password Levels ........................................................................ 3-46
Obtaining a Temporary Password ............................................. 3-46
Utilities ................................................................................................ 3-46
Date/Time and S/N .................................................................... 3-46
I/O Data Display ......................................................................... 3-46
Cycle Statistics .......................................................................... 3-46
Oxygen Cell Status .................................................................... 3-46
Oxygen Calibration .................................................................... 3-46
Software Versions ..................................................................... 3-46
Conguring Parameters ...............................................................................3-47
FlexFit Edit ...........................................................................................3-47
Servo Setup .................................................................................................3-47
Servo Setup Step 1 – Congure the Servos' Travel Limit Switches .. 3-48
Servo Setup Step 2 – Congure the Servos' Addresses ................... 3-48
Servo Setup Step 3 – Congure the Servos' Functions and Feedback
Data ................................................................................... 3-48
Servo Setup Step 4 – Congure the Servos' Zero and Direction of Travel
........................................................................................... 3-49
To Next Page
Loading...
Need help?
General
