7
Figure 3–Burner Mounting for Ratiomatics with Alloy Firing Tube
For installation of Ratiomatics with blocks and holders, refer to Eclipse Installation 295.
Burner
Nuts &
Lock
Washers
Ceramic
Fiber
Gaskets
Oven Wall
Firing Tube
Same Grade
Sheet Metal
As Inner
Oven Wall
Mounting Studs
3/8" Dia. x 1-3/4" lg.
(10 mm x 44 mm)
Up to 6"
(152 mm)
1/4" Minimum
Clearance
All Around
Firing Tube
6"
(152 mm)
45 Deg.
Minimum
Included
Angle
Blower
Motor
Filter
Set Screws (2)
Rotor
Step 1:
Remove cover with filter or grill attached
Step 3:
Remove motor
Step 2:
Remove rotor
Figure 5–Blower Motor Replacement
Figure 4–Flame Monitoring, Spark Plug & Air Flow Switch Locations
Pilot Inlet
1/4" N.P.T.
U.V.
Scanner Port
1/2" N.P.T.
Air Valve Shaft
Tap “D”
Air Switch
Connection
1/8" N.P.T.
Blower
Ignition Plug
750–1250: #150000-5
1500–2000: #150000-12
DETAIL
Peepsight
1/2" N.P.T.
Spark Plug
1/2" N.P.T.
Flame Rod or
UV Scanner
1/2" N.P.T.
Tap “D” (2)
Air Switch Connection
1/8" N.P.T.
Air Valve
Shaft
10
4.0 Start-Up And Adjustment
(continued)
Step 3: Adjust Pilot
Drive the control motor to low fire and set the system to operate on pilot only.
Turn the handle of the pilot adjusting cock open to light the pilot.
Turn the internal screw shown below counterclockwise to increase flow,
clockwise to decrease flow, until the pilot gives reliable ignition and a steady
flame signal with minimum pilot gas flow.
Pilot Cock
50 through 600 Sizes
750 through 2500 Sizes
Handle
Shown in
Open Position
Top Screw
Remove to Adjust
Cap
Remove to Adjust
Adjusting Screw
Clockwise for less pilot gas;
Counterclockwise for more pilot gas.
