Specifications

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SECTION 2 VTG-IOM-2012-1001 INSTALLATION
4 CAUTION
Care needs to be taken to eliminate
oxygen from the water system, as
excess oxygen in the system will
reduce the life of any boiler. The
boiler warranty does not cover heat
exchanger replacement due to oxygen
contamination of boiler water.
Heat exchanger failure due to
inappropriate water quality, foreign
matter or debris damage is not covered
under the warranty.
If the piping system attached to this
unit will be chemically cleaned, the
boiler must be disconnected from the
system and a bypass installed so that
the chemical cleaning solution does
not circulate through the boiler.
§ The system must have an automatic pH controller to monitor and log the
§ levels. This must be independent of other chemical feed systems.
§ Makeup water pH range must be 7.5 - 8.8; the boiler water must be
maintained within pH range of 8.5 - 10.5.
4. Operate the boiler in a closed-loop system using water or water/glycol
(not requiring a make-up water supply). A large amount of improperly
treated make-up water can cause premature failure of the heat exchanger
resulting from scale build up. Scale build up will reduce the e ciency and
useful life of the boiler and is not covered under warranty.
Pressure Vessel
Drain Connection
Exhaust
Connection
Condensate
Drain Connection
¡ Prevent Oxygen Contamination
There are several ways to prevent boiler water oxygen contamination:
§ Minimize system leaks to minimize make up water requirement
§ Do not use open tanks or  ttings
§ Do not use oxygen permeable materials anywhere in the water system
§ Repair leaks in the system quickly
§ Eliminate  ttings wherever possible
§ Use air elimination devices in system piping
FIGURE 4  DRAIN CONNECTION AND EXHAUST CONNECTION LOCATIONS