Eclipse RatioAir v1 - Installation Guide No. 115, 4/7/06
1
Control Motor
Pipe Connections
Bypass Start Gas Piping
Set
Screws
Motor
Shaft
Control
Motor
Coupling
Washers
BV
Shaft
Main gas
shut-off
valve train
NC
4
3
2
1
5
NC
Bracket
Pipe
Union
Bypass Start Gas Piping (optional)
nstall the piping as shown in the schematics using the following
guidelines.
•
Locate the start gas solenoids
1
close to the burner. The gas
must reach the burner during the trial for ignition period.
•
Minimize piping elbows.
•
Install an adjustable limiting orifice (ALO)
2
for start gas
adjustment. Refer to Bulletin 728 and 730 for further
information.
•
Include a straight run of pipe at least 8 inches long
3
before
(upstream from)
the start gas orifice
5
(optional) and at least 4
inches long
4
after (downstream from) the start gas orifice.
Pipe Connections
•
Installation of a pipe union in the gas line is recommended to
simplify burner removal.
•
Use of flexible pipe is optional.
Note:
Flexible pipe causes higher pressure drops than standard pipe.
Consider this when sizing your gas lines.
Piping Support
Use brackets or hangers to support the gas piping. If you have
questions, consult your local gas company.
Control Motor
Install a control motor to modulate the air butterfly valve if not
previously installed on the burner.
Note:
Be sure the control motor shaft and air butterfly valve
shaft are aligned properly. If using an Eclipse Actuator
Mounting Parts Kit, the supplied washers may be used as
shims (stacked 0, 1, or 2 high) to ensure proper alignment.
Additionally, a flexible coupling can be used to handle minor
misalignment.
