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SERIES 28HE STEAM 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 fi tting!
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 see Figure 4. Snug the nuts fi nger tight.
Use a spirit level to ensure that the fi rst 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 port connectors
are properly positioned follow the torque sequence
shown in Table 4.
Use anti-seize on draw rod and washer,
coating thread
and washer on one end only
. Torque the draw rods from
the end with anti-seize and washer. Follow the steps as
described below. Do not completely tighten one side;
gradually work each side using an alternating pattern
until the correct torque is reached.
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.
Table 3 - Section Locations
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
28HE-4
F
T
H
B F
Front
Section
28HE-5
F
H
T
H
B
T
Intermediate Section w/ 5" Tapping & Boss
28HE-6
F
T
H
T
H
B
H
Intermediate Section w/ Heater Opening
28HE-7
F
T
H
P
T
H
B
P
Intermediate Section, Plain
28HE-8
F T H P H T H B B
Back
Section
28HE-9
F T H P H P T H B
28HE-10
F H T H P H P T H B
28HE-11
F H T H P T P T H B
28HE-12
F H T H P T H P H T H B
28HE-13
F H T H P H T P P H T H B
28HE-14
F H T H P H T H P H P T H B
28HE-15
F H T H P H P T H P H P T H B
28HE-16
F H T H P H P H T H P H P T H B
28HE-17
F H T H P H P H T H P H P H T H B
28HE-18
F H T H P H P H P T H P H P H T H B
