Dunkirk Q95M-200 User Manual

Aluminum Series

High Effi ci ency Gas-Fired Boi ler

DIELECTRIC ISOLA TION &
ANTI F REEZ E P ROTECTI O N

ADDENDUM

This addendum applies to series:

UB90, UB95, Q90, Q95M, K90, K95M, BW9 & GWB9, FW95M & OL95M

WARNING

You

MUST

damage to boiler’s heat exchanger caused by
inadequate dielectric isolation, incorrect water
treatment or antifreeze application. Failure to
comply could result in possible severe personal
injury, death or substantial property damage.

follow these instructions to prevent

Instructions in this addendum replace all related
information in Boiler Installation Manual, User’s
Manual, or any other supplemental instruction or
addendum.

Apply this information in place of any related
information in Installation, Operation &

!

Maintenance Manual Accompanying this boiler.

• DIELECTRIC ISOLATION
Two (2) 1-1/4” X 1-1/4” Female to female

dielectric isolation unions are shipped loose
in boiler parts bag. Install Dielectric Isolation
unions at boiler supply line and return line. Install
isolation fi ttings nearest boiler prior to system
piping connections.

• WATER TREATMENT and ANTIFREEZE
PROTECTION

MUST

high effi ciency gas-fi red boilers using antifreeze
protection.

be applied for

ALL

aluminum series

WARNING

Install boiler so gas ignition system components

!

are protected from water (dripping, spraying,
rain, etc) during appliance operation and service
(circulator replacement, etc).

P/N# 240006888, Rev. E [06/2011]

System and Operating Precautions

Applies to ALL Aluminum High Effi ciency Gas-Fired Water Boilers

WARNING

Clean the System First
BEFORE

clean and fl ush system thoroughly. Verify
system is free of sediment, fl ux and any
residual boiler water additives.

Systems having antifreeze not recommended
must be completely fl ushed to ensure no
old antifreeze remains. In older systems
obviously discolored, murky or dirty water; or
pH reading outside acceptable range (between

7.0 and 8.0) are indications the system

!

should be cleaned or treated. Thoroughly
fl ush system with clean water to remove any
sediment or contaminants. Sludge and iron
oxide deposits can cause rapid breakdown of
inhibitors.

Flushing with clean water. If chemical cleaners
are used, use only those recommended
for use with aluminum boilers. Follow
chemical cleaner manufacturer’s instructions
completely.

DO NOT

products.

connecting boiler to heating system,

mix different manufacturer’s

WARNING

WARNING

Eliminate System Leaks

Continuous addition of make-up water will
constantly add oxygen to system. Eliminate
all system leaks. All system leaks must be
repaired immediately.

Verify expansion tank is operational and
properly sized. Undersized expansion tanks
cause relief valve weeping and substantial
make-up water addition.

Operation of this boiler in system containing
signifi cant amounts of dissolved oxygen

!

can cause severe heat exchanger corrosion
damage.

This boiler is not designed for use in systems
containing regular additions of make-up
water. Regular additions of make-up water
may cause severe heat exchanger damage.
System leaks may not always be visible. An
unseen system leak will become obvious if
boiler pressure decreases when make-up
valve is closed.

This boiler is designed for closed loop hydronic
heat system
for natural gravity type installations, or any
other open type system.

ONLY!

This boiler is not suitable

Fill Water and Chemistry

Verify water used to fi ll system meets these
requirements:

System fl uid pH maintained between 7.0
and 8.0.

Maintain water hardness below 7 grains

!

hardness.
Filling with chlorinated potable water is

acceptable.
containing chlorine in excess of 100 ppm.

DO NOT

are not listed at the end in this addendum.
Consult local water treatment specialist

for recommendations if any of above
requirements is outside stated ranges.

DO NOT

use inhibitors or other additives that

fi ll boiler with water

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