Download Dunkirk 90-75 Operating instructions

INTRODUCTION
Dimensions.................................................................................................................... 2
Introduction................................................................................................................... 3
Important Safety Information........................................................................................... 4
Boiler Ratings & Capacities .............................................................................................. 5
Boilers For Use At High Altitude - United States Installations ................................................ 6
Before Installing The Boiler .............................................................................................. 8
Boiler Installation ...........................................................................................................9
Near Boiler Piping ......................................................................................................... 11
Combustion Air And Vent Pipe ........................................................................................ 22
Gas Supply Piping ......................................................................................................... 28
Electrical Wiring ........................................................................................................... 30
Controls And Accessories ............................................................................................... 35
Start Up ...................................................................................................................... 37
Operating Instructions................................................................................................... 38
S9381A Integrated Boiler Control Operation And Adjustments ............................................ 39
Verification Procedure And Adjustment ............................................................................ 42
Differential Air Pressure Switch Check - All Models ............................................................ 45
Negative Pressure Switch Check ..................................................................................... 46
Maintenance And Cleaning ............................................................................................. 47
Troubleshooting ............................................................................................................ 49
Appendix A - Water Quality, Water Treatment And Freeze Protection .................................... 51
Installation And Check-Out Certificate ............................................................................. 55
Introduction
• This appliance is a gas-fired direct vent hot water boiler
with cast aluminum boiler sections.
• Induced draft fan draws in outside combustion air,
takes cooler flue gases from boiler unit and provides
positive removal of flue gases from the building
through readily available PVC and CPVC pipes.
• The heating system water absorbs large amounts of
heat from the cast aluminum heat exchanger, cooling
flue gases and causing condensation.
• These low pressure gas-fired hot water boilers are
design certified by CSA International for use with
natural gas and propane gase (90-100 Series 2 model
is certified for natural gas only).
• Sealed combustion, premix gas burner, and low flame
temperature means reduced CO and NOx emissions,
which contribute to cleaner and healthier environment.
• This appliance takes its combustion air directly from
outdoors (sealed combustion) and does not compete
with building occupants for fresh air.
• Boilers are constructed and hydrostatically tested
for maximum working pressure of 50 psig (pounds
per square inch gage) in accordance with A.S.M.E.
(American Society of Mechanical Engineers) Boiler and
Pressure Vessel Code Section IV Standards for heating
boilers.
• Sealed combustion (also known as “direct vent”)
is safest and best way to obtain plenty of clean
combustion air.
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