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Step 2:
Blower Option
Selection
Air Inlet
Filter
Switch
Step 3:
Control
Methodology
Excess air
Gas
Air/Gas Flow
Eclipse RatioAir v1 Design Guide No. 115, 11/12/2008
Note:
Standard blower options are listed in Price List 115,
additional blower options are available through Eclipse.
Price and leadtime may vary.
Power Supply Frequency
Air
Select the 50Hz or 60Hz option. The 50Hz blower motors have
Flow
IEC frames and are CE marked. The 60Hz motors have NEMA
Right
frames.
Hand
Blower
Pressure & Flow
Motor
RatioAirs include a combustion air blower.
Blower Motor Type
Motor types include various options: voltages, single or three
phase, TEFC or automotive duty enclosures.
Blower Inlet
When selecting an inlet, consider the following:
•
amount and size of particles in the air
•
sound requirements
•
space limitations
•
cleanliness requirements of the process
Motor Orientation
All RatioAirs are assembled with a right-hand blower motor
orientation.
All standard RatioAirs are designed for:
•
air:gas ratio controlled combustion
•
10% to 15% excess air at high fire
•
higher excess air at low fire
Burner Control
RatioAirs come with a ratio regulator that maintains the air:gas
ratio.
Ratio
Regulator
•
A control signal is sent from a process temperature controller
(sold separately) to the control motor. (Refer to Bulletin 818C
or contact Eclipse for further information on temperature
controllers.)
Gas Flow
Air Butterfly Valve (BV)
Loading Line
Control
Motor
Heat
11
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