Crown Boiler 24-05, 24-11, 24-10, 24-08, 24-12, 24-06, 24-09, 24-03, 24-04 Series 24 Section Arrangement

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BOILER SECTION IDENTIFICATION CODE

F = FRONT SECTION WITH 4” SUPPLY TAPPING	C = CENTER SECTION
B = BACK SECTION WITH 4” SUPPLY TAPPING	CX = CENTER SECTION WITH 4” TOP SUPPLY TAPPING

NOTES: FOR BOILERS LESS TANKLESS HEATER, REPLACE THE “CT” SECTIONS WITH “C” SECTIONS.

Figure 8: Series 24 Section Arrangement

i.From the “Section Arrangement” chart, select the next section according to the “Identiﬁcation Code” at the top of the chart. See Figure 8. Use a wire brush to clean the groove in the face of

NOTICE

The sections must be assembled according to the arrangement shown to ensure proper operation, proper assembly of canopy, jacket and alignment of piping and tankless heaters with jacket knockouts. Start with the back section and work towards the front.

the next section. Then, using a cartridge of RTV 6500 or RTV 736 sealant in a caulking gun, ﬁll the groove in this section with silastic sealant.

Touch-up any missed spots before draw-up. Touch-up after draw-up has no value.

j.Clean and lubricate nipple ports on next section to be assembled and place on nipples previously installed in rear section. To facilitate assembly, it is advisable to enter the upper nipple ﬁrst in its port. Then enter the lower nipples in their respective ports. If necessary, place a lifting bar

(crowbar) under the center of the section and lift the nipple port onto the upper nipple.

k.Drive section in place with a heavy block of wood, striking blows as squarely as possible over nipple port.

l.The large draw-up rod lugs with dual holes are cast in the four (4) corners of each casting. Starting with the upper holes, install four

(4)5/8” x 9¾” long draw-up rods along with washers and nuts (see Figure 9).

CAUTION

To avoid damage to the draw-up rod threads while drawing up sections, apply oil or other lubricant to tie rod threads while assembling sections to prevent stripping of threads on rod and to make assembling easier.

m. DRAW UP SECTION SLOWLY AND EVENLY using an alternating pattern starting with the upper right lug and proceeding to the lower left , lower right and ﬁnishing with upper left lug.

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Contents Series Page Important Information Read Carefully Page Page Table of Contents Table of Contents Section I General Information Boiler RATINGS/DATA Locate the Unit Section I General InformationChimney or Vent Boiler FoundationVents Faults & Suggestions Assembly of Sections Manual DRAW- UP Section II Cast Iron Block AssemblyNipple Gauge Series 24 Section Arrangement Draw-Up Rods Alternating Pattern Manual Draw-up Center Section Channel Block Position Partial Block Draw-Up Hydraulic Draw-Up of Sections Canopy with Rear Flue Outlet Damper Assembly Section III Installation InstructionsBare Boiler Assembly Avoid Breathing Fiber Particulates and Dust Left Side Canopy Intermediate Bracket Inspect ALL Boiler Seals Mount Rear Observation Port Cover Refer to FigureSeries 24 Jacket Assembly Boiler Models 24-03 thru Mount Burner Adapter Plate to Burner Mounting Plate Burner Mounting Plate Refer to Figures 16Purpose of Tappings Steam Boilers Steam Trim Steam Boilers Install Steam Trim This Is Intentionally Left Blank Purpose of Tappings Water Boilers Water Trim Water Boilers Install Water Trim Burner InstallationBoiler Piping Heating Applications Page Parallel Piping Conversion Recommendation 1 Use when Recommendation 2 Use when Recommendation 3 Use when Page Page Page BMounting Elevations M&M 150, 64 Float Low Water Cut-offs Schematic Tankless Heater Piping 24-08 24-09 CCW Open to System Return Temperature Control and ComponentsWater Boiler Pressure Relief Valve Hook-Up Typical Boiler Wiring with RTC Front Typical Boiler with RTC Return Sensor Rear Fill Heating System with Water Always Inspect Installation BeforeSection IV Operating Instructions Starting BurnerFlame Failure Boil MIN Delay Check Operation of High Limit Control Test ControlsBoiler and System Cleaning Steam Boiler Boiler and System Cleaning Water Boilers Oxygen Corrosion Frequent Water AdditionClean the Boiler Flueways Section V Service InstructionsMaintenance of LOW Water Cutoff Devices Operation General Maintenance ConsiderationsOIL Burners Section VI Burner SpecificationsSection VII Repair Parts & Carton Contents Series 24 Master Parts List Section VII Repair Parts Jacket Carton Bare Boiler Assembly Section Joiner Carton Assy Rear Target Wall Carton Standard Steam Trim Carton Assy RTC Carton with Outdoor Reset Tankless Coil Components Boiler Water Section Viii Appendix Page Mechanical Page Mechanical Electrical Page Page Page Page Page Page Page Page Series 24 Boiler Circulator Selection Taco 20F Differential Boiler Recirculation Grundfos Circulating Pump Way Boiler Recirculation Bell and Gossett Circulating Pump Way Boiler Recirculation Armstrong Circulating Pump Way Application Appendix C Valve and Actuator Mounting InstructionsService Record PN 980417 S24 12/05