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H280-series Valve Overheat / Relocation Kit Instructions: RC Ovens
Instructions for Applying Kit #4523368
This kit is for a convection RC, 36” oven only. For a Standard 36” oven, use Kit #4522559
Installation Prerequisites:
RC Oven, Piezoelectric Ignition
U-Burner with no welded bracket
Tools Needed:
Wrenches
Small Hacksaw (for extension installation if required)
Screwdrivers (Robertson, Flat), long and short
Riveter
Electrical Tape
Parts:
Part # Descr
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Instructions: 1) Remove Kick Plate Unscrew and set aside This kick plate will not be reinstalled. A replacement is provided in the kit. 2) Remove Safety Valve The following steps will apply for a Baso Valve: 1) Unscrew 11/16” compression nut on oven orifice fitting. 2) Unscrew 11/16” compression nut on 11/16” elbow on Valve Main Burner Gas Inlet. Elbow itself should still be connected to Main Gas Inlet but detached from valve. 3) Unscrew 7/16” compression nut on Pilot Ga
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3) Unscrew Igniter Bracket Unscrew the two screws holding down the igniter bracket to the orifice bracket. Left: Before removal, location of screws shown by arrows Right: After removal 4) Remove Door Springs Once the springs are removed, the oven door will be free to fall. Use a strong tape to keep the oven door closed for safety purposes. For the door hinge with no microswitch: Insert a long screwdriver underneath the bell crank assembly such that the tip extends beh
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Pry upward with the screwdriver. While holding this position, unhook the oven door hinge link. Unhooked oven door hinge link Use flat head screwdriver to pry spring from bell crank assembly. Remove spring. Prying spring from bell crank assembly 03/09/09 P/N 4523367 Page 4
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For the door hinge with a microswitch: Unscrew the microswitch bracket from the oven frame. It is important that the microswitch be removed prior to removing the spring to prevent damage to the microswitch when the springs are reinstalled later. Microswitch bracket held to oven frame by two screws indicated by the arrows Follow the same steps as before, using the screwdriver to pry the bell crank assembly upwards to unhook the oven door hinge link, then pry the spring loose
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5) Remove Orifice Bracket After removing the igniter bracket, the orifice bracket will be held in place by a single screw directly above the orifice. Note that with the removal of the igniter bracket, the orifice bracket is held down by a single screw as shown by the arrow 03/09/09 P/N 4523367 Page 6
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6) Install Extension Fitting (if applicable) If pilot gas tube going into the valve already has an extension piece (short piece of tubing plus 3/16” brass fitting), unscrew the shorter piece of tubing and proceed to Step 13. Otherwise, follow these steps to install the proper fitting. This step must be performed if a TS-11 valve was just removed. If a Baso valve was uninstalled, cut off 2.5” of the free end of the incoming pilot gas tube to remove the original ferrule and nut and
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7) Remove Left and Right Front Shields Both shields are attached to the upper support bar using 3 screws. Left: Left side front shield, location of screws shown by arrows Right: Right side front shield, location of screws shown by arrows 8) Remove Burner Burner is not screwed down to oven floor and can be removed by gently sliding it out. This burner will not be reinstalled. Left: Lower oven cavity after removal of front shields Right: Original burner with single w
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9) Unscrew Pilot Bracket from Oven Floor The bracket is held down to the oven floor using two screws. This bracket will not be reinstalled. Left: Pilot assembly with bracket mounted to oven floor Right: Pilot assembly with bracket removed 10) Detach Igniter and Bracket from Pilot Assembly Use a pair of pliers to gently detach the ignition wire from the igniter. Slide the sheath off the wire. This sheath will be reused in the next step. The old pilot assembly (including
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11) Assemble New Pilot Assembly A colored line on the top of the pilot indicates the type of fuel used. A BLACK line is used on a natural gas pilot, whereas a RED line is used on a propane pilot. Ensure the proper pilot is used. Insert sheath onto new pilot assembly ignition wire Push sheath onto wire until about 1 inch of orange ignition wire protrudes from the free end New pilot assembly with sheath inserted onto ignition wire Use electrical tape to secure the free en
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Reattach original igniter Connection of taped ignition wire end to original igniter Attach flex tube to pilot assembly Unscrew the nut on the end of the selected pilot to release the nut, the ferrule and the orifice. Install the nut and the ferrule on one end of the flex tube. Place the orifice back into the pilot and screw on the flex tube. Nut on new pilot assembly unscrewed, revealing orifice and ferrule. 03/09/09 P/N 4523367 Page 11
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Attach new Robertshaw thermocouple to pilot assembly Push the thermocouple all the way into its slot on the pilot. Left: Wrong installation. Thermocouple not pushed all the way through socket. Right: Correct installation. Thermocouple pushed all the way through socket. 12) Attach New Pilot Assembly to Welded Bracket on New Burner The pilot mounts onto the welded bracket using a single screw Bend the thermocouple and flex tube approximately as shown in the picture. This w
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13) Install New Burner Ensure that the bracket at the tip of the burner locks onto the bracket attached to the oven floor. No screws are necessary for this procedure. The burner may not stand up perfectly by itself. The installation of the oven orifice later will correct this problem. New burner and pilot assembly installed 14) Reinstall Both Front Shields Install the right side shield first, guiding the various pieces of tubing and wire as shown in the below photograph.
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15) Reinstall Orifice Bracket Refer to Step 5 for orifice bracket connections Make sure that the orifice is inserted straight into the burner and not at an angle Orifice inserted straight into burner opening 03/09/09 P/N 4523367 Page 14
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16) Reinstall Door Springs Refer to Step 4 for door spring connections For the door hinge with no microswitch: Hook on one end of the spring to the hooks from the orifice bracket Place a screwdriver underneath the opposite end of the spring and pry upward to hook that end onto the bell crank assembly. Left: Setup screwdriver at end of spring underneath hook on bell crank assembly Right: Screwdriver pried upward, locks spring into place Pry the bell crank assembly upw
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17) Reinstall Igniter Bracket Refer to Step 3 for igniter bracket connections 18) Attach Main Burner Gas Line Flex Tubes onto Valve Two brass fittings (Part 7, Assembly Drawing) should already be installed on the Main Burner gas inlet and outlet on the Baso valve. Otherwise, they are included in the kit separately for service personnel assembly. Unscrew the free end of each fitting to release the nut and ferrule. Install these on one end of each 7/16” flex tube (Part 2, Assembly
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19) Screw on Pilot Gas Flex Tube, Adjust Main Burner Gas Fitting Remove the brass nut and ferrule originally on the pilot gas outlet on the Baso valve (Part 5 and Part 6, Assembly Drawing). Install them onto the free end of the flex tube. Screw the pilot gas flex tube onto the Baso valve pilot gas outlet. This step should be done first to minimize stress on the flex tube during later steps. The fitting on the Main Burner Gas Inlet needs to be turned 180 from its original positio
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20) Install New Pilot Gas Tube If a new 3/16” fitting (Part 4, Assembly Drawing) was installed on the pilot gas tube (Part 3, Assembly Drawing), unscrew the nut on the free end of the fitting to release the nut and the ferrule. If a fitting was already installed on the pilot gas tube, unscrew one end of the unused 3/16” fitting to release the nut and ferrule Unscrew the nut on the Baso valve pilot gas inlet to release the brass nut and the ferrule. Install these nuts and ferrules
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21) Connect Remaining Tubes and Thermocouple The free end of each 7/16” flex tube from the valve should be fitted with a 7/16” nut (Part 10, Assembly Drawing) and 7/16” ferrule (Part 11, Assembly Drawing). Connect the 7/16” flex tube and the thermocouple. Tighten all connections. The final tube connections should be comparable to the picture below. Final Tube Configuration 22) Attach Lighting Instructions to Valve Bracket The pilot lighting instructions are riveted on th
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23) Attach Bracket to Oven For Standard Ovens: Unscrew the two screws holding the orifice bracket to the lower oven frame. Slip the bracket (Part 8, Assembly Drawing) underneath the valve assembly such that the taller face is flush up against the lower oven frame. Position the screw holes on the bracket such that two of them line up with the holes used for the orifice bracket. The third hole on the far right of the bracket will line up with a hole on the lower oven frame.
