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Dunkirk
Boiler

Model # Q90-75 Official Dunkirk boiler & storage tank

Here are the diagrams and repair parts for Official Dunkirk Q90-75 boiler & storage tank, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Installation guide
Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 119 parts  |
Blower 146-31-077
#5

Flue adapter/exhauster assy diagram

Blower

Part #146-31-077

Replaced by #2272065

?
Manufacturer substitution
This part replaces 146-31-077. Substitute parts can look different from the original.
$543.40 | 
$12.00 OFF Phone Price : $555.40
In Stock
Relief Valve 146-22-011
#6

Boiler block/piping assy diagram

Relief valve

Part #146-22-011

Replaced by #10-408-05

?
Manufacturer substitution
This part replaces 146-22-011. Substitute parts can look different from the original.
$44.77 | 
12% OFF Phone Price : $50.77
In Stock
Burner 146-31-007
#2B

Mixer/air pressure switch assy diagram

Burner

Part #146-31-007

Replaced by #550001811

?
Manufacturer substitution
This part replaces 146-31-007. Substitute parts can look different from the original.
$359.63
In Stock
Circulator 146-26-045
#NI

Jacket/base assy diagram

Circulator

Part #146-26-045

Replaced by #103251

?
Manufacturer substitution
This part replaces 146-26-045. Substitute parts can look different from the original.
$224.79 | 
5% OFF Phone Price : $236.79
In Stock
Transformer 146-62-801
#8

Jacket/base assy diagram

Transformer

Part #146-62-801

Replaced by #550001339

?
Manufacturer substitution
This part replaces 146-62-801. Substitute parts can look different from the original.
$69.09
In Stock
Drain Valve 146-22-000
#19

Boiler block/piping assy diagram

Drain valve

Part #146-22-000

Replaced by #31-606-04

?
Manufacturer substitution
This part replaces 146-22-000. Substitute parts can look different from the original.
$36.16
In Stock
Furnace Burner Igniter (replaces 438-00-014) 438-00-013
#11A

Mixer/air pressure switch assy diagram

Furnace burner igniter (replaces 438-00-014)

Part #438-00-013

The manufacturer no longer makes this part, and there's no substitute part

Elbow 146-93-040
#4

Boiler block/piping assy diagram

Elbow

Part #146-93-040

The manufacturer no longer makes this part, and there's no substitute part

Gas Orifice,ng K9075 146-31-029
#27B

Mixer/air pressure switch assy diagram

Gas orifice,ng k9075

Part #146-31-029

The manufacturer no longer makes this part, and there's no substitute part

Lowr Front Panel Blue 750-00-1027
#21

Jacket/base assy diagram

Lowr front panel blue

Part #750-00-1027

The manufacturer no longer makes this part, and there's no substitute part

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