Installation and Service Instructions
Midco
®
International Inc.
4140 West Victoria Street
Chicago, Illinois 60646
toll free 866.705.0514
tel 773.604.8700
fax 773.604.4070
web www.midcointernational.com
e-mail sales@midcointernational.com
Quality Designed for Proven Performance
Printed in USA
8471 34
HMA 2 &
HMA 2A
DIRECT FIRED MAKE-UP AIR BURNERS are used in
industrial and commercial applications to maintain the
desired environmental temperatures required by critical
processes i.e. health purposes, production systems,
quality control, comfort and loss prevention where it
is necessary or required to exhaust large amounts of
conditioned air.
Make-up Air Systems used as stand alone heating
systems or operating in combination with central heating
plants systems can be cost eff ective in three ways: 1)
reducing the initial expenditures, 2) tempering incoming
air which may extend the life of expensive central heating
plants and 3) reducing excessive equipment cycling or
premature component failures due to increased heating
demands.
Our innovative two stage combustion burner is not just a
modifi cation or improvement of the old, but a completely
new approach to direct-fi red combustion. The two-stage
combustion improves control of the fl ame process, meets
or exceeds the new ANSI Standards while outperforming
the competition. By incorporating two separate fl ames
within the burner combustion zone, the fl ame is more
stable, shorter and cleaner, permitting the reduction of
emissions levels and allowing for higher temperature rise
and higher tolerance to varying conditions when placed in
the profi le opening.
The Blue Flame Series
Features and Benefi ts
Reduced NO
2
and CO Emissions: Lower emissions
levels that pass the ANSI Z83.4, Z83.18 and Z83.25 standards.
Higher Temperature Rise: The two stage combustion
process lowers NO
2
emissions which is the limiting factor in
temperature rise.
Increased Capacity: Up to 750,000 BTU’S per foot. (Higher
BTU levels can be achieved if ANSI Z83 Standards for CO and
NO
2
emissions are not of a concern. Process heaters can fi re
up to 1,000,000 BTU’S a foot or more.)
Increased Diff erential Pressure Drop and Higher Velocities:
HMA 2 & 2A burners can operate as low as 0.05″ to 1.4″ W.C.
diff erential pressure range or in air velocity as low as 800 fpm to
4000 fpm.
Flame Stability: Two stage combustion provides better fl ame
stability and emission control, allowing for a shorter fl ame and
easier profi le confi guration.
Reduced Inventory Costs - HMA 2A: Single burner casting
can be fi red with natural, propane or butane gas
1
, reducing
burner inventory.
Reduced Shipping Costs: A smaller, lighter casting than the
competition’s, can lower your freight costs.
Turndown: 30-1 turndown can be achieved with proper
modulating controls and valves. (Higher turndown possible
depending on equipment design.)
Emission performance is application specifi c and may vary.
1
Consult Midco for applications using butane fuels.
Direct-Fired Gas Burners
MADE in the USA
1219
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