U.S. Boiler Company MegaSteam MST758, Installation, Operating And Service Instructions

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103536-13 - 2/24
MegaSteam
Installation & Service Manual
Figure 2-8: Purpose of Tappings and Bosses
Tapping
Location
Size, NPT
Boss
Location
Thread Size
UNC
Steam Boiler
Less Heater With Heater
A ¼ in. - 18 Pressure Gauge
B ¼ in. - 18 Pressure Limit
C ¾ in. - 14 Probe LWCO - Std.
D ½ in. - 14 Water Gauge Glass
E 2 in. - 11½ in. Supply (Front & Rear Tappings)
F ¾ in. - 14 Safety Valve
G 1½ in. - 11½ Condensate Return
H 1¼ in. - 11½ Optional Front Return
J 1½ in. - 11½ Surface Blowoff (Plugged)
K 1 in. - 11½ Indirect Water Heater Supply
L ½ in. - 14 Indirect Water Heater Limit
M (4 pcs) 5/16 in. - 18
Jacket Front Panel, Burner Swing Door Mounting
Bracket
N (2 pcs) 3/8 in. - 16 Burner Swing Door
P (10 pcs) 5/16 in. - 18
Jacket Rear Panel, Smoke Box Collar, Cleanout
Covers
Q ¼ in. - 18 Smokebox Pressure Tapping
R ½ in. -14
L4006
Operating
Control
Plugged
Table 2-9: Purpose Of Tapping & Bosses
2
Unit-Pak Boiler Assembly
(continued)