Table Of Contents - Dunkirk Q90-125 Installation, Operation & Maintenance Manual

1 - Boiler Ratings & Capacities .................... 3
2 - Safe Installation And Operation ............. 5
3 - Locating The Boiler .............................. 6
5 - Combustion Air/ Vent Requirements ..... 11
6 - Combustion Air And Vent Pipe ............. 13
7 - Gas Supply Piping .............................. 15
8 - Electrical Wiring ................................ 16
9 - Controls And Accessories .................... 20
10 - Startup ........................................... 22
11 - Detailed Sequence Of Operation......... 27
12 - Sequence Of Operation Diagnostics .... 28
13 - Checkout Procedure & Adjustments .... 29
14 - High Limit Control And LWCO..............31
15 - Troubleshooting ............................... 33
16 - Maintenance And Cleaning ................ 42
Appendix A -
Dielectric Isolation &Antifreeze Protection ...44
Parts, Kits and Accessories........................49
Warranty.................................................61
Check Out Certifi cate...............................63
KEEP THIS MANUAL NEAR BOILER
RETAIN FOR FUTURE REFERENCE
Safety Symbols & Warnings
The following defi ned symbols are used throughout this
manual to notify the reader of potential hazards of varying
risk levels.
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,
could result in minor or moderate injury.
NOTICE
Used to address practices not related to personal
injury.

TABLE OF CONTENTS

IMPORTANT:
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 fl ammable vapors
and liquids.
DO NOT obstruct air openings to the boiler room.
Modifi cation, substitution or elimination of factory
equipped, supplied or specifi ed components may
result in personal injury or loss of life.
TO THE OWNER - Installation and service of this
boiler must be performed by a qualifi ed 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.
2
Read following
WARNING
!
WARNING
!
instructions