MG, SG & AAA Series Boilers – User’s Information Manual
6
9 CORROSIVE
ATMOSPHERES
If a gas boiler is to be installed near a corrosive or potentially corrosive air supply, the boiler should be
isolated from it and outside air should be supplied.
Chemical vapors from products containing
chlorine
or
fluorine
must be avoided. Even though these
chemicals may be safe to breathe, corrosive substances can become liberated when passed through a
gas flame. Even at low concentrations, these chemicals can significantly contaminate the air supply and
shorten the life of any gas burning appliance. The following is a list of some of the products which should
be avoided:
•
bleaches and chlorinated cleaning products
•
paints and sprays
•
water softeners (calcium or sodium chloride)
•
leaking refrigeration equipment
•
freon from common aerosol dispensers
These chemicals are especially commons near swimming pools, beauty shops, dry cleaning
establishments, laundry areas, workshops, and garages.
The warranty is void when failure is due to
corrosion.
10 AIR SUPPLY FOR COMBUSTION AND VENTILATION
A sufficient air supply MUST be provided to this boiler. Air openings to the boiler room provide the air for
combustion, flue gas dilution and ventilation and are always required, regardless whether the air is taken
from inside or outside. The air opening size and location, as well as exhaust venting considerations must
conform to the applicable codes. If any alteration of the air supply and venting system is required, contact
a qualified service agency.
The boiler room must never be under a negative pressure. Air openings should be sized by your installer
not only to the dimensions required for the total input of all fuel-fired appliances in the boiler space, but
also to handle the air movement rate of any
exhaust fans
or
air movers
using air from the building or
space.
Make sure the venting terminations are always kept clear of obstructions (i.e. snow, ice, etc.). Louvers
and grilles used in your air supply and ventilation system should be checked regularly and cleaned of any
dust, dirt, or debris which will block proper airflow.
11 CHECK FOR DRAFT HOOD SPILLAGE
WARNING
Continuous spillage at the draft hood relief opening may result in severe personal injury, death
or substantial property damage.
After the main burners have operated for 5 minutes, check to see that combustion products are going up
the chimney or gas vent properly by passing a lighted match (or smoke from a cigar, cigarette, or pipe)
around the edge of the relief opening of the draft hood. If the chimney or gas vent is drawing properly,
the match flame or smoke will be drawn into the draft hood. If not, the combustion products will tend to
extinguish this flame.
If the combustion products are escaping from the relief opening of the draft hood, IMMEDIATELY
shutdown the boiler and contact a qualified service agency to make proper adjustments or repairs.
