Burnham FM01FD00B manual Draw-Up

2.ASSEMBLY OF SECTIONS (HYDRAULIC

DRAW-UP)

• MPC4 through MPC12 Section Assemblies

The entire assemblage may be drawn-up at one time using the hydraulic draw-up equipment providing the operation is completed within two (2) hours after the sealant was applied to the first casting in the assembly. If time limit is reached, draw-up partial section assembly before continuing.

• MPC13 through MPC18 Section Assemblies

The total assemblage should be first drawn-up into two (2) sub-assemblies. Each sub-assembly may be drawn-up at one time using the hydraulic draw-up equipment providing the operation is completed within two (2) hours after the sealant was applied to the first casting in the sub-assembly. No more than 12 sections should be drawn up at one time.

“Hydraulic Draw-Up Tool Kit” is available through Burnham by ordering part number 101904-01.

Step a. Repeat Step ‘a’ through Step ‘l’ under “Field Assembled Sections (Manual Draw-Up)”.

Step b. Continue driving sections in place (in their respective order) until all sections are in the assemblage. Ground surfaces between adjoining sections should be spaced 3/8” to 1/2” apart. Spacing of more than 1/2” will limit number of sections that can be drawn up in one unit and could indicate cocked nipples.

WARNING

Sealant must be properly applied to ALL boiler joints. Failure to properly seal the boiler joints will result in combustion gas leaks through the joint. DO NOT operate boiler with combustion gas leaks. The sealant should be applied before each section is placed on the assembly.

On long boiler assemblies, it may be necessary to draw up a partial block if the entire boiler is not ready to be drawn up tight within two (2) hours of the first application of the Silastic. If the block assembly time extends overnight, the partial block completed must be drawn up tight before leaving the boiler overnight. If a joint springs apart, it must be re-drawn tight within two (2) hours of first application of Silastic to the joint.

Step c. From the Hydraulic Draw-up Kit, locate and assemble one (1) set of draw-up assemblies that each include ¾” x 23” lg. threaded rod(s), ¾” coupling nut(s) (if applicable), the appropriate pressure plate, washer and ¾” hex nut as shown in Figure 5. Insert one (1) assembly through each of the 3” and 4” NPT bosses on rear section until pressure plate is tight against the boss. Locate and place the 8¾” dia. pressure plate on

the opposite end of threaded rod in upper nipple port. Place remaining 6½” dia. pressure plate on rod protruding through lower nipple port.

NOTICE

As assembled length increases, use 3/4” coupling nuts and additional rods, provided in Kit, to extend draw-up rod length.

Slide ¾” washer, hydraulic ram and second ¾” washer over each rod assembly. Remove all slack from assemblies and apply draw-up rod clamps.

Center upper pressure plates on nipple port and boss while pumping ram set until tension holds assembly in place. Repeat for lower assembly. Refer to Figure 5 to verify proper arrangement.

CAUTION

Rods should be approximately centered in openings so that rods and couplings (when used) do not drag on pipe thread in end section tappings.

WARNING

READ THE STATEMENTS BELOW BEFORE

ATTEMPTING TO USE HYDRAULIC EQUIPMENT.

•Release pressure in ram pumps before attempting to remove clamps.

•Do not stand in line with draw-up rods at either end when hydraulic pressure is being applied. As a safety measure, ends of draw- up rods should be covered while sections are being drawn in case rods should snap while under tension.

•Do not operate ram against draw-up coupling.

•Do not operate pump after ram has reached stroke limit.

Step d. Draw-up Sections

Use hydraulic rams to draw up sections by applying pressure alternately on the draw-up rods. When rams reach stroke limit, release pressure in ram pumps and then move clamps to new position.

Step e. Continue to draw-up until all sections make contact at the ground joints.

If the sections still do not appear to be drawn metal to metal, use feeler gauge provided to measure any gaps at the locations identified in Figure 8. (Unless specified otherwise, gaps should be measured at these locations). A maximum gap of .025” is acceptable.

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