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IX. Hydronic Piping (continued)
E. Oxygen Contamination
1. Continuous addition of make-up water will
constantly add oxygen to the system and lead
to corrosion. Black oxide sludge (magnetite,
Fe3O4) forms as a result of continuous electrolytic
corrosion in any system unprotected by an inhibitor.
2. To minimize oxygen presence in the system, all
system leaks must be repaired immediately. DO
NOT connect the boiler to radiant tubing without
an oxygen barrier.
3. There are many possible causes of oxygen
contamination such as:
a. Addition of excessive make-up water as a result
of system leak
b. Absorption through open tanks and fittings.
c. Oxygen permeable materials in the distribution
system.
4. In order to insure long product life, oxygen sources
must be eliminated. This could be accomplished by
taking the following measures:
a. Repairing system leaks to eliminate the need for
addition of make-up water.
Table 21: Corrosion/Scale Inhibitors and Removal Agents
Producers
Inhibitors
Noise reducer
Universal
Cleaner
Sludge remover
Antifreeze
Tightness
Table 22: Water Treatment Types
Treatment Type
Producer F1
X100
X200
X300
X400
X500
Alphi 11
Leaker Sealer F4
Sotin 212
MC1+
40
Fernox
Protector F1/Alphi 11
-
Restorer
Protector F1, Cleaner F3
Alphi 11
-
Preventive
Corrective
X
X
X
X
X
X
X
X
X
X
X
b. Eliminate and/or repair fittings which allow
oxygen absorption.
c. Use of non-permeable materials in the distribution
system.
d. Isolating the boiler from the system water using
an indirect heat exchanger.
e. Using properly designed air elimination devices
in water piping.
Thermal Solutions' Standard Warranty does not cover
boiler failure caused by oxygen contamination of boiler
water or scale build-up.
When using Glycol products, all Glycol manufactur-
ers' requirements, including rust inhibitors, must
be adhered to. Maximum 50 % Glycol.
Do not use ethylene glycol in systems that can
come in contact with domestic hot water, such as
indirect water heaters.
Sentinel
Sotin
X100, X500
Sotin 212
X200
X300
X400
Sotin 212
X500
Leak Sealer F4
Table 23: Flow Rates for Glycol Systems
System Glycol
Concentration (%)
50
30
Note: Total system water volume includes
expansion tank(s) and reservoirs.
NOTICE
NOTICE
WARNING
WARNING
ADEY
MC1+
-
-
-
-
-
-
-
-
-
Increase Flow,
(%)
24
14
AMP 400-1000L I&O Manual
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