
Contents
Chapter 1 Safety Precautions ....................................................................................................................5
Safety Guidelines........................................................................................................................5
Cautionary Symbol Definitions......................................................................................................6
Safety Precautions ......................................................................................................................7
Safety Decals ...........................................................................................................................12
Safety Sign-off Sheet.................................................................................................................14
Chapter 2 Specifications .........................................................................................................................15
VariFlame vapor propane specifications ......................................................................................15
VariFlame natural gas specifications...........................................................................................16
Chapter 3 System Overview ....................................................................................................................17
User Interface ...........................................................................................................................18
Typical Controller Connections...................................................................................................21
Heater component functions ......................................................................................................22
Burner control module and sequence of operation .......................................................................24
Operation modes ......................................................................................................................26
Chapter 4 Installation ..............................................................................................................................29
Installing the air diverter.............................................................................................................29
Installing for recirculating operation (indoor) ................................................................................30
Pipe sizing guidelines ................................................................................................................32
Wiring Diagrams and Schematics ...............................................................................................36
Chapter 5 Controller Settings ..................................................................................................................41
The Main Screen.......................................................................................................................41
Turning OFF the heater..............................................................................................................42
Setting the parameters for the heater..........................................................................................42
Setting the parameters for a Variable Input Mode.........................................................................43
Setting the parameters for Standalone Mode...............................................................................46
Setting the parameters for Legacy Mode .....................................................................................47
Enabling a second probe ...........................................................................................................49
Testing the LED probes with blink mode ......................................................................................51
Checking the System Status ......................................................................................................52
Chapter 6 Startup and Operation .............................................................................................................53
Pre-startup inspections ..............................................................................................................53
Emergency heater shutdown......................................................................................................53
Normal heater shutdown............................................................................................................53
Starting the heater.....................................................................................................................54
Operating the burner .................................................................................................................54
Adjusting the heater output ........................................................................................................54
Chapter 7 Service and Maintenance ........................................................................................................57
Cleaning the heater ...................................................................................................................57
Guidelines for checking gas pressure .........................................................................................57
Checking the valve inlet pressure ...............................................................................................58
Checking the valve output pressure ............................................................................................58
Replacing the motor and fan wheel.............................................................................................59
Replacing the air proving switch .................................................................................................61
Replacing the Temperature High Limit Switch..............................................................................62
Replacing the Flame Probe........................................................................................................64
Replacing the Ignitor..................................................................................................................66
Replacing the control board .......................................................................................................67
Replacing the gas valve.............................................................................................................68
Chapter 8 Troubleshooting......................................................................................................................71
Troubleshooting ........................................................................................................................71
LED meanings ..........................................................................................................................74
Pneg-2092 VariFlame Heater with Edge Connect 3