Step 2: Blower Option Selection - Eclipse AirHeat AH series Design Manual

Fuel Type
Table 3.1 Fuel Type
Heating
Fuel Symbol
Natural 1000 BTU/ft
CH 90%+
4
Gas (40.1 MJ/m
Propane C H 2525 BTU/ft
3 8
(101.2 MJ/m
Butane C H 3330 BTU/ft
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
AirHeat burners are available with aluminum burner
manifolds only.
Mounting Flange
Select the mounting hardware best suited to your
application. Hardware is available for Duct Mounting, Slot
Firing and Continuous Flange Mounting.
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.
Control Valve
AirHeat Burners can be supplied with the following control
options:
• Reduced Port Packaged - The control valve is
sized based on burner input and fuel type. (See
pages 3 & 4 of Datasheet 135)
• Reduced Port Separate - 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.
Eclipse AirHeat Burner, V2, Design Guide 135, 6/16/2010
Gross
Stoichiometric
Specific
Air/Gas Ratio
Value Gravity
(ft
3
0.60 1290 BTU/ft
3 )
3
1.55 2028 BTU/ft
3
)
3
2.09 2303 BTU/ft
3
)
3
@ normal conditions)
Flame Supervision
Flame supervision is by flame rod or UV scanner.
Depending on configuration selected, flame sensor can
be mounted at either or both ends of the burner (see
Datasheet 135).
3 3
/ft )
Control Motor
air gas
3
Select a control motor. Standard control motor options
include various models which Eclipse will mount to the
3
burner. Burners can be ordered with control motor bracket
and mounting hardware only. Customer supplied control
motors must conform to the these specifications:
3
• rotation not to exceed 2 rpm
• 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
Air Flow Switch
The air flow switch provides a signal to the monitoring
system when there is not enough air pressure from the
blower. If a switch is selected, it will be factory mounted.
Eclipse supports the NFPA regulation requiring, as
a minimum standard for main gas shut-off
systems, the use of an air pressure switch in
conjunction with other system components.

Step 2: Blower Option Selection

NOTE: Standard blower options are listed in Price List
135, additional blower options are available through
Eclipse, price and leadtime may vary.
Power Supply Frequency
Blowers are available with 60Hz motors. Motors have
NEMA frames.
Blower Motor Type
Motor types include various options: voltages, single or
three phase.
Blower Inlet
When selecting an inlet, consider the following:
• amount and size of particles in the air
• cleanliness requirements of the process
WARNING
7