Smith Cast Iron Boilers Series 28A - Manual (Page 9)

Page 9 SERIES 28A BOILER INSTALLATION AND OPERATION INSTRUCTIONS
5. Insert the large port connector with its steel inner
ring into the upper port.
6. Insert the two round port connectors into the lower
ports.
NOTE: Apply the spray adhesive supplied with the
boiler to the port recess to hold the port connector
in place if necessary.
7. Select the correct intermediate section and carefully
move it into place against the back section, Figure
4.
CAUTION: Any steam uptake and heater sections
must be located as shown in Table 3. Failure to
comply with this caution may result in poor boiler
performance and prevent the jacket from fitting!
Only one intermediate section with an external leg
boss has been included. It should be located toward
the front of the boiler for optional low water cutoff
use. See Table 3.
NOTE: A putty knife or similar tool can be used to
hold the port connectors in place while the
intermediate section is positioned. It must be
removed before the sections make contact or the
port connector will be damaged resulting in a leak!
8. Insert the four draw rods through the casting
bosses. Thread nuts onto one end of the rods. Place
washers on the other end of the rods before
threading nuts onto them. Snug the nuts finger tight.
Use a spirit level to ensure that the first two sections
are plumb and properly aligned, Figure 6. Check the
rope to insure that it’s properly positioned. Once the
sections are plumb and the rope and por t
connectors are properly positioned follow the torque
sequence shown in Table 4.
Figure 6 - Section Alignment
Table 4 - Section Torque Sequence
Step
Rod Position Torque
ft lbs Nm
1 Upper Right 25 34
2 Lower Left 25 34
3 Lower Right 25 34
4 Upper Left 10 14
5 Upper Right 50 68
6 Lower Left 50 68
7 Lower Right 50 68
8 Upper Right 75 102
9 Lower Left 75 102
10 Lower Right 75 102
11 Upper Left 30 42
12 Upper Right 125 169
13 Lower Left 125 169
14 Lower Right 125 169
15 Upper Right 125 169
16 Upper Left 40 54
NOTE: With these initial torques the sections may
not be metal to metal, which is acceptable. If any of
the ports leak during the hydrostatic test the torque
can be increased to 200 ft lbs,
271 Nm on the upper
right rod. The torque on the lower left and right rods
can be increased to 150 ft lbs,
203 Nm. Once the
sections are metal to metal additional torque will not
improve the seal.
Boiler Section Location Numbered From Front To Back
Model 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
28A-4 F T H B F Front Section
28A-5 F H T H B T Intermediate Section w/ 5" Tapping & Boss
28A-6 F T H T H B H Intermediate Section w/ Heater Opening
28A-7 F T H P T H B P Intermediate Section, Plain
28A-8 F T H P H T H B B Back Section
28A-9 F T H P H P T H B
28A-10 F H T H P H P T H B
28A-11 F H T H P T P T H B
28A-12 F H T H P T H P H T H B
28A-13 F H T H P H T P P H T H B
28A-14 F H T H P H T H P H P T H B
28A-15 F H T H P H P T H P H P T H B
28A-16 F H T H P H P H T H P H P T H B
28A-17 F H T H P H P H T H P H P H T H B
28A-18 F H T H P H P H P T H P H P H T H B
Table 3 - Section Locations