EngA G-TRAC 1.1

A G-TRAC MANUAL
IOM-24 Page ii March 1999 R1
Method 3 ............................................................................................................................................... 8
Method 4 (May correct minor electrical noise on remote wire) ................................................................... 8
X. BMS RESET OF THE DISCHARGE AIR TEMPERATURE ..................................... 8
XI. POTENTIOMETERS ON THE G-TRAC ................................................................. 10
XII. DIAGNOSTIC LIGHTS ........................................................................................... 10
Heat Call Light .................................................................................................................................... 10
Pre-Purge Timer Light ....................................................................................................................... 11
Burner Enabled Light ........................................................................................................................ 11
XIII. TROUBLE SHOOTING .......................................................................................... 11
Supply Blower Not Starting .............................................................................................................. 11
No Heat (Burner Not Firing) ................................................................................................................ 12
Low Heat (Burner Firing) .................................................................................................................... 12
Unit Short of Temperature Rise ........................................................................................................ 12
Over Delivering Air ............................................................................................................................ 13
Inlet Gas Pressure Low or Burner Rumbles.................................................................................... 13
Regulator/Manifold Pressure Low or Slow to Respond ................................................................. 13
Gas Valve Won’t Open Fully (G-TRAC Slave to CTRAC) ................................................................... 13
Water and Ice From Combustion ...................................................................................................... 13
Over Heating ....................................................................................................................................... 14
Rapid Cycling of SA Contacts on G-TRAC Connected to BMS Reset .......................................... 14
G-TRAC not responding to BMS signal ........................................................................................... 14
Flame Failure Lockouts ..................................................................................................................... 14
“B” and “C” BURNER ELECTRODE DETAIL ............................................................................ 15
XIV. CHANGING A G-TRAC IN THE FIELD .................................................................. 15
TO SET PRE-PURGE TIME DELAY ................................................................................................... 15
TO SET THE MAINTAIN PURGE TIME DELAY ................................................................................ 16