Eclipse RA Series Design Manual page 10

Step 1: Burner Option
Selection
(Continued)
Configuration Selections:
Upright Left Hand Piping
Upright Right Hand Piping
Inverted Left Hand Piping
Inverted Right Hand Piping
10
Control Motor
Select a control motor. Standard control motor options include
various models which Eclipse will mount to the burner. RatioAirs
can be ordered with control motor bracket and mounting hardware
only. Customer supplied control motors must conform to the these
specifications:
• 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
- the chamber is to be fired with positive or negative
pressure
- the chamber pressure is outside the range -1" w.c.
to +1" w.c. (-2,5 to 2,5 mbar)
- there is a need to indicate a high and/or low fire air
butterfly valve (BV) position
Burner Configuration
Select configuration.
Gas Pipe Connection
Select the gas pipe connection including the pipe thread type and
the turndown required.
The piping, burner gas inlet, and ratio regulator are threaded using
the customer selected pipe thread option.
The high turndown option includes a ratio regulator with an
adjustment for lower inputs.
Flame Supervision
Determine if a flame rod or an ultraviolet (UV) scanner will be
required. Flame rods are available on model RA0025, RA0040,
RA0075 and RA0100 burners with alloy or SiC tubes. A flamerod
can also be used on RA0200 burners but with upright left hand
piping or inverted right hand piping configurations only. All other
options and models require UV scanners. If a UV scanner is
required, it must be ordered separately.
Warning:
A UV scanner could possibly detect another burner's
flame if it is in the line of sight, and falsely indicate
flame presence.
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.
Warning:
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.
Eclipse RatioAir v1 Design Guide No. 115, 11/12/2008