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SERIES 28HE STEAM BOILER INSTALLATION AND OPERATION INSTRUCTIONS
Figure 16 - Relief & Safely Valve Piping
Table 7- Boiler Water Content
Boiler Model Steam Boilers
Gallons
Liters
28HE-4
104
394
28HE-5
126
477
28HE-6
148
560
28HE-7
170
644
28HE-8
192
727
28HE-9
214
810
28HE-10
236
893
28HE-11
258
977
28HE-12
280
1060
28HE-13
302
1143
28HE-14
324
1227
28HE-15
346
1310
28HE-16
368
1393
28HE-17
399
1511
28HE-18
412
1560
Control Installation
Locate the temperature & pressure gage, low water cutoff,
high limit and operating controls per Figures 14 & 18.
Optional controls must be installed in accordance with the
control manufacturers instructions and Figures 14 & 18.
Note: The front jacket panel MUST be installed before
any controls are attached to the front boiler section!
CAUTION: The controls must be mounted in the
correct location and according to the control
manufacturer’s instructions or the boiler may not
function properly!
Water Column Piping
A variety of water level controls are available for the
28HE. The water column piping needed to properly
mount each control is available from Smith. Figure 18
shows a typical water column piping arrangement. The
1 in. NPT x 7 1/2 in. nipple is always installed in the
lower water column tapping, Figures 14 & 18 and Table
5.
STEAM BOILER PIPING
Steam Boiler Piping Connections
Table 3 contains the steam riser location schedule. Riser,
equalizer and header pipe sizes are located in Table
8. A typical single boiler piping arrangement is shown
in Figure 22. Figures 23 & 24 contain typical piping
diagrams for steam boilers in a battery.
NOTE: See CLEANING OF STEAM BOILERS before
connecting the return piping.
CAUTION: Improper placement of steam risers will
result in poor steam quality!
Table 8 - Steam Boiler Piping Sizes
Boiler Number
of
Header
Equalizer
Model
5" NPT Risers Size, NPT
Size, NPT
4 & 5
1
5"
2 1/2"
6 & 7
2
5"
2 1/2"
8 Through 10
2
6"
4"
11 Through 18
3
8"
4"
The steam piping should be pitched so the condensate
fl ows in the direction of steam travel. The return tappings
should be yoked to equalize the return fl ow. Swing joints
should be used.
Figure 18 - Boiler Control Locations
