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

2

System and Operating Precautions

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

General Guidelines When Using
Antifreeze

Use only antifreeze products •
recommended for use with
aluminum boilers, as listed in this
addendum. See Table 1.

Continuous addition of make-up water •
will dilute power of antifreeze and
change buffers ability to maintain pH.

Flush old antifreeze from system. •
Flush boiler and system separately.

Do not use antifreeze unless required.•
Antifreeze, if needed, must be of •

type listed on next page due to
their operational characteristics of :
type 356 T6 aluminum at operating

!

temperatures between 20°F (-6.7°C)
and 250°F (121°C). (See Table 1 for
allowable products.)

Always clean system prior to •
using antifreeze as stated in this
supplement.

WARNING

If system has leaked, water and antifreeze •
chemistry will need to be adjusted. To avoid
damage to boiler, check pH and chemistry

of boiler solution and consult the antifreeze
manufacturer for recommendations.

It is recommended that pH reading be •
taken annually, and adjusted as necessary.
Follow antifreeze/inhibitor manufacturer’s
instructions for details on how to adjust pH.

Antifreeze solutions can break down over •
time. Failure to check antifreeze chemistry
on annual basis may result in accelerated
corrosion of boiler and other system
components. Consult with antifreeze
manufacturer for recommendations.

Use of antifreeze in any boiler will reduce •
heating capacity as much as 10-20%. Take
into consideration when sizing heating
system, pumps and expansion tank. Consult
antifreeze manufacturer’s literature for
specific information on reduced capacity.

Be sure to follow antifreeze •
manufacturer’s instructions for use,
safe handling and storage of their
products. Refer to MSDS (Material
Safety Data Sheets) provided by
antifreeze manufacturer for potential
hazards and first aid procedures for
exposure or ingestion.

Antifreeze will raise pH of hydronic •
solution in heating system above
recommended level due to corrosion
inhibitors. Solution must be treated to
maintain a pH within recommended
level. Follow antifreeze manufacturer’s
instructions to adjust pH.

Using antifreeze manufacturer’s instructions, •
determine freezing temperature needed and
use correct amount of antifreeze. Never
exceed 50% antifreeze by volume.

Boiler operating pressure must remain below •
15 psi for antifreeze solutions that specify
a maximum of 250°F (121°C). Otherwise,
increase system operating/tank pressure to
20 psig.

manufacturer instructions for adjusting
tank pressure.

Note: Refer to expansion tank

3

System and Operating Precautions

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

Table 1

Antifreeze Products

Compatible Aluminum Antifreeze & Inhibitor Suppliers

Noble Company
P. O. Box 350

Noburst AL Antifreeze

Rhogard Antifreeze &

Pro-Tek 922 Inhibitor*

* Pro-Tek 922 Inhibitor may be used to adjust the pH level of the hydronic system, but on occasion may

not resolve the pH issue. In these cases, fl ush the system and refi ll with untreated water and antifreeze
suitable for aluminum heat exchangers, as listed in this supplement.

Alphi-11

Intercool NFP-30,40,50 AA

Intercool RPH-15*

Grand Haven, MI 49417
www.noblecompany.com
Tel: [phone]
Fax: [phone]

Rhomar Water Management, Inc.
P. O. Box 229
Springfi eld, MO 65801
www.rhomarwater.com
Tel: [phone]
Fax: [phone]

Hydronic Agencies, Ltd.
(Fernox North Distributor)
15363 117 Avenue
Edmonton, AB T5M 3X4
Canada
www.hydronicagencies.com
Tel: [phone]
Fax: [phone]
Fernox
www.fernox.com

Interstate Chemical
2797 Freedland Road
P.O. Box 1600
Hermitage, PA 16148-0600
www.interstatechemical.com
Tel: [phone]
Fax: [phone]

Hercules Chemical Company, Inc.
111 South Street

Hercules cryo-tek™-100/Al

Passaic, NJ 07055
www.herchem.com
Tel: [phone]
Fax: [phone]

* This product may be used to adjust pH level of hydronic system, but on occasion may not resolve pH

issue. In these cases it is recommended to fl ush system and refi ll with untreated water and new boiler
manufacturer approved antifreeze suitable for Aluminum heat exchangers.

4