Dunkirk Q90-50 Instructions

Aluminum Series 90+
Gas Fired Boiler Installation Guidelines,
Water Treatment and Antifreeze Protection
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P/N 240006888 Rev 1.0 [10/07]
IMPORTANT: These instructions are in addition to any existing
Antifreeze and Water Treatment information in the boiler instal-
lation manual, the boilers user's manual or any other existing
supplemental instruction or addendum. Antifreeze may be used
in most applications. Water alone may also be used in most
applications. Consult with your heating professional for recom-
mendations.
The information in this Supplemental Instruction is to be used
in place of that in the following manuals: 14683301 rev 3.4,
240004826D rev 1.3, 240006103D rev 1.1, 14683604 rev 3.4,
240004826K rev 1.3, 14683450 rev 3.5, 1305016 rev 2.1,
1305016 rev 2.1,240004826B rev 1.3, 240004826BF rev 1.3,
240006103B rev 1.1, 240006103BF rev 1.0, 1305011 rev 3.4,
240004826U rev 1.3, 240006103U rev 1.1.
Recommendations
* System leaks may not always be visible. An unseen system
leak will become obvious if boiler pressure decreases when
make up valve is closed.
* All system leaks must be repaired immediately. Constant in-
troduction of make up water will introduce dissolved oxygen,
resulting in accelerated boiler corrosion.
Water Chemistrv L.
* This boiler is designed for a closed loop hydronic heat sys-
tem ONLY! This boiler is not suitable for natural gravity type
installations, or any other open type system.
* System fluid pH must be maintained between 7.0 and 8.0.
* Maintain water hardness below 7 grains hardness.
* Filling with chlorinated fresh water should be acceptable
since drinking water chlorine levels are typically less than
5 ppm. Do not fill boiler with water containing chlorine in
excess of 100 ppm.