Eclipse RatioMatic 50 Operation & User’s Manual

Version 1.01 7/97 Contents 1.0 Operating Parameters & Requirements ............... page 2 2.0 Burner Operation & Controls ................................ page 4 3.0 Installation ............................................................. page 6 4.0 Start-Up and Adjustment ...................................... page 8 5.0 Trouble-Shooting .................................................. page 13 6.0 Maintenance .......................................................... page 14 7.0 Servicing ................................................................ page 15 The burners covered in this Guide are ...

Do not operate Ratiomatic burners with less gas inlet pressure than the minimum listed in Figure 1. Lower gas inlet pressures may cause the proportionator to remain fully open as the burner turns down from high fire, causing excess fuel opera- tion and the possible accumulation of unburned fuel in the chamber. In extreme cases, this may cause explosions or fires. Chamber Temperatures Cast Head & Alloy Firing Tube: 1500° F. maximum. (816° C) Alloy Head & Refractory Block: 1800° F. maximum. (982° C) Temperatures shown are for average installations. Depending on conditions, higher operating tempera ...

3 Burner Size 50 100 150 200 300 400 500 600 750 1000 1250 1500 2000 2500 -12.5 205 410 616 850 1076 1369 1612 2052 2726 3664 4279 5188 6800 8090 -7.5 191 366 557 733 1002 1345 1612 1934 2521 3400 4045 4895 6448 7800 -2.5 161 322 484 645 924 1231 1521 1817 2315 3107 3781 4572 6067 7474 0.0 147 293 440 586 879 1172 1466 1759 2198 2931 3664 4397 5862 7328 +2.5 132 264 396 528 835 1112 1407 1685 2081 2755 3517 4221 5657 7152 +5.0 117 234 352 469 786 1049 1348 1612 1964 2579 3371 4015 5452 6990 11.7 7.3 8.8 8.8 19.1 16.1 19.1 19.1 22.0 29.3 36.6 44.0 58.6 73.3 Turndown 12:1 40:1 50:1 67:1 46:1 73:1 77:1 92:1 100:1 100:1 100:1 100:1 100:1 100:1 -12.5 11.2 1 ...

Failure to use suitable flame sensing devices and automatic fuel shut-off valves can cause explosions and fires. The owner/user and/or his insur- ance underwriter is responsible for providing, using, and maintaining suitable limit controls, flame supervision, and other safety devices for this burner, and for properly interfacing all electrical equipment and sequenc- ing burner operation. Turndown Method Ratiomatic burners are designed to operate with either two-position or modulating temperature control systems. Gas-air ratio control is performed by a ratio regulator as shown in Figure 2. Control Motor Requirements S ...

Main Gas Adjusting Valve Pilot Adjusting Valve Set-Up & Operation Against Back Pressure (Positive Chamber Pressure) Set-Up & Operation Against a Draft (Negative Chamber Pressure) OR OR Set-Up & Operation (Neutral Chamber Pressure) 120 100 Air Gas 80 60 40 20 0 Low Fire % of Neutral High Fire Flow High Fire Excess Air 120 100 Air Gas 80 60 40 20 0 Low Fire % of Neutral High Fire Flow High Fire Excess Air 120 100 Air Gas 80 60 40 20 0 Low Fire % of Neutral High Fire Flow High Fire Excess Air Air Valve Settings: • Factory Set–fully open at high fire, fully closed at low fire. Results: • High fire is increased. • L ...

The flange will support only the weight of the burner assembly. Support burner supply piping independently of the burner. Reinforce the oven wall as required to support the burner’s weight. Gas flow through the proportionator must be horizontal with the stem pointing up. Blower Wiring Be sure the motor is wired to rotate in the proper direction. Control Motors Factory mounted when ordered with the burner. Motors and mounting kits or- dered separately include installation drawings. Combustion Air Filters Factory mounted when ordered with the burner. ...

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 Switc ...

Step 1: Initial Settings NOTE: Use the following set-up procedure when factory settings have been disturbed, or when chamber pres- sures are outside the range of +1" to -1" w.c. (+2.5 to -2.5 mbars). Factory Settings The following parameters are set at the factory: 1) Pilot input, 2) Low and high fire air flow, and 3) Low fire gas flow. Because of this, the burners should ignite and burn reasonably well at low fire, but the high fire gas setting will need to be adjusted as described below under Step 4. Control Panel Settings Pilot Adjustment: Some provision should be made to operate only the pilot during pilot adjustment. ...

Step 2: Adjust Low Fire Air Setting Measure differential air pressure as shown below. Low Fire Air Differential Pressure Must be a minimum of 0.2" w.c. (0.5 mbar), which is obtained with the air butterfly valve in the fully closed position under neutral conditions. Cycle the control motor several times, checking high and low fire differential pressures. If they don’t repeat, check for a loose valve shaft coupling or binding of the motor or valve. Tap “A” Measure air differential pressure between this tap and a tap in the chamber wall 50 through 600 Sizes 750 through 2500 Sizes Low Fire Air Adjustment 1. D ...

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. ...

Step 4: Set High Fire Gas With the pilot lit and the control motor in the low fire position, open the main gas shut-off valve. The main flame should light. Drive the control motor to its high fire position. Measure the gas differential pressure as shown below. High Fire Gas Differential Pressure See Figure 1. If necessary, adjust the gas flow with the butterfly valve. The flame should be clear blue as shown on the cover of this manual. If the flame is yellow, see Section 5.0, “Troubleshooting.” Tap “B” Measure gas differential pressure between this tap and a tap in the chamber wall Adjust Gas Here 50 t ...

Step 5: Adjust Low Fire Flame Return the control motor to the low fire position. Check the combustion air differential pressure as discussed in Step 2. Gas pressure drop across the burner will be too low to read reliably, but the flame should be clear blue as shown on the cover of this manual, entirely within the firing tube, and tight on the burner head. If necessary, adjust the ratio regulator bias screw as shown below to obtain the proper low fire flame. If the flame cannot be viewed, adjust the bias screw to produce the mini- mum gas flow that will generate a steady flame detector signal of sufficient str ...

fied plant electricians, technicians, or engineers experienced in all facets of this type of combustion equipment. CAUTION CAUSE(S) PROBLEM Burner behaves erratically, does not respond to adjustment. Main flame too long & yellow at high fire. Main flame too short at high fire. Low fire (pilot) flame is long, soft or yellow. Low fire flame is weak or unstable. Main flame fails to light or goes out as burner cycles to high fire. Pilot fails to light. 1. On initial start-up, gas line may be filled with air. Repeat ignition trial several times to purge. 2. N ...

will greatly increase equipment reliability and productivity. Frequency of mainte- nance checks should reflect the duty cycle of the heating equipment and condi- tions such as dirt and temperature. Any maintenance program should include at least the following steps: Check Pressure Settings Check burner high and low fire air and gas settings. Check Filters Examine and, if necessary, clean or replace air and gas filter elements. Check Pipes for Leaks Check all piping connections for leaks. Check Flame Supervision Equipment Check the abil ...

See Figure 5 for blower motor replacement. Replacement motors must have the same nameplate ratings as the original motor. Filter Element Replacement See Figure 6 for filter element replacement. Spark Plug & Flame Rod Replacement Ignition plugs and flame rods wear out over long periods of normal burner opera- tion. For Ratiomatic burners, the part number used as the ignition plug is the same as that used for the flame rod. Eclipse recommends that the user keep at least one of these in stock at all times to prevent nuisance shutdowns. See Figure 7 for plug and rod replacement. Figure 7–Ignition Plug & Flame Ro ...