Table Of Contents - Dunkirk DXL-125 Installation, Operation And Maintenance Manual

Dimensions ....................................................... 2
Ratings & Data - Natural Gas & Propane Gas ......... 4
Locating the Boiler ............................................. 5
Ventilation & Combustion Air ............................... 6
Supply and Return Piping .................................... 7
Vent Installation ...............................................12
Vent System Modification ...................................12
Vent Damper Installation & Instructions ...............13
Gas Service ....................................................14
Electrical Section ..............................................15
Wiring Diagram - Intermittent Ignition ................16
Lighting Instructions .........................................18
Sequence of Operation ......................................19
General Instructions .........................................19
Checking Gas Input Rate To Boiler ......................21
Control Settings ...............................................22
System Start-Up..............................................23
Limit Control Troubleshooting ............................24
Intermittent Pilot Troubleshooting .......................25
Appendix A-1 - Vent Damper Harness ............. 27
Appendix A-2 - Vent Damper TroubleShooting 28
Become familiar with symbols identifying potential
hazards.
!
DANGER
Indicates a hazardous situation which, if not
avoided, WILL result in death or serious injury.
!
WARNING
Indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
!
CAUTION
Indicates a hazardous situation which, if not
avoided, may result in minor or moderate injury.
NOTICE
Used to address practices not related to personal
injury.

TABLE OF CONTENTS

KEEP THIS MANUAL NEAR BOILER
IMPORTANT: Read the following instructions
COMPLETELY before installing!!
Fire, explosion, asphyxiation and electrical shock
hazard. Improper installation could result in death
or serious injury. Read this manual and understand
all requirements before beginning installation.
Keep boiler area clear and free from combustible
materials, gasoline and other flammable vapors and
liquids.
DO NOT obstruct air openings to the boiler room.
Modification, substitution or elimination of factory
equipped, supplied or specified components may
result in personal injury or loss of life.
TO THE OWNER - Installation and service of this
boiler must be performed by a qualified installer.
TO THE INSTALLER - Leave all instructions with
boiler for future reference.
When this product is installed in the Commonwealth
of Massachusetts the installation must be performed
by a Licensed Plumber or Licensed Gas Fitter.
Laceration, burn hazard. Metal edges and parts
may have sharp edges and/or hot. Use appropriate
personal protection equipment to include safety
glasses and gloves when installing or servicing this
boiler. Failure to follow these instructions could
result in minor or moderate injury.
3
RETAIN FOR FUTURE REFERENCE
!
WARNING
!
WARNING
!
CAUTION
240009041
P/N , Rev. C [04/30/2017]