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Burner Style
AH-MA DualBlock burners are available in straight
sections, double T geometries and cross sections. Select
the geometry that best suits the installation. The housing
material is stainless steel, but for burner sizes above
AB600L model, the housing is manufactured in standard
steel plate. For these sizes, and upstream processing
temperature above 500°F (260°C), please contact
Eclipse.
Air Supply
AH-MA DualBlock burners can be ordered with or without
a combustion air blower directly mounted to the burner.
For remote blower applications, see "Remote Blower
Sizing".
Fuel Type
Table 3.1 Fuel Type
Fuel
Symbol
Heating
Natural
1000 BTU/ft
CH
90%+
4
Gas
(40.1 MJ/m
2525 BTU/ft
Propane
C
H
3
8
(101.2 MJ/m
3330 BTU/ft
Butane
C
H
4
10
(133.7 MJ/m
3
BTU/ft
@ standard conditions (MJ/m
If using an alternative fuel supply, contact Eclipse with an
accurate breakdown of the fuel components.
Manifold Type
AH-MA DualBlock burners are available with steel gas
manifolds only.
Mounting Flange
Select the mounting hardware best suited to your
application. Hardware is available for External Mounting
on wall duct, and with fixing plate for Internal Mounting
with process or external combustion air inlet.
Burner Configuration
Left hand or right hand piping is available. Configuration is
based on viewing the burner from the air inlet.
Gas Pipe Connection
The piping, burner gas inlet, and fuel modulating valve (if
selected) are threaded using the customer selected pipe
thread option.
Eclipse AH-MA DualBlock Burner, V2, Design Guide 163, 6/19/2012
Gross
WOBBE
Specific
Gravity
Value
3
0.60
1290 BTU/ft
)
3
3
1.55
2028 BTU/ft
)
3
3
2.09
2303 BTU/ft
)
3
3
@ normal conditions)
Control Valve
AH-MA DualBlock can be supplied with the following
control options:
• Burner System Mounting - The control valve is
sized based on burner input and fuel type.
• Separated Mounting - Order when fuel control
valve cannot be mounted directly to the burner due
to system considerations.
• Less Control Valve - If not supplied by Eclipse,
customer must supply a suitable fuel control valve
capable of suppling fuel in accordance with the
burners operating range.
Ignition Type
Ignition can be by direct spark or spark ignited pilot for
models below AB0400L. Rest of models use by spark
ignited built-in pilot only.
Flame Supervision
Flame supervision is by flame rod or UV scanner.
Depending on configuration selected, flame sensor can
Index
be mounted at either or both ends of the burner.
Control Motor
3
Select a control motor. Standard control motor options
3
include various models which Eclipse will mount to the
burner. Burners can be ordered with control motor bracket
and mounting hardware only. Customer supplied control
3
motors must conform to these specifications:
• Rotation not to exceed 2 rpm. (30 sec / 90° typical)
• Minimum torque of 25 in-lb. (2,8 Nm)
• 90° stroke
• Continuous modulating or high/low modulating
control
• Reversible direction of rotation
• Certain applications may require control motors with
a limit switch or switches if:
- the burner capacity is to be limited to fit an
application
- there is a need to indicate a high and/or low fire
butterfly valve position
7
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