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H
H
A
J
J
J
Water line
Close nipple
Reducing elbow or
elbow with bushing
Condensate return
23 / "
13
16
2"
Boiler
front
Steam to system
73832
EG/PEG
H
H
A
J
J
J
Water line
Close
nipple
Reducing elbow or
elbow with bushing
Condensate
return
23 / "
13
16
2"
Boiler
front
Steam to
system
73832a
Install offset header
to prevent bending
at section tappings
EGH
B
Part Number 550-142-303/1120
17
EG
/
PEG sEriEs 6
•
EGH sEriEs 5 Gas-firEd boilErs — boilEr manual
General
Failure to properly pipe the boiler may result in
improper operation and damage to the boiler or
building.
Steam supply must be on same end as controls.
Return may be from either end.
1. Install the boiler jacket before connecting return piping. (Sup-
ply piping can be connected before or after jacket installation.)
Connect controls after all piping is connected.
2. See Table 7 for recommended pipe sizing.
3. See Figure 5, page 10, for tapping locations.
4. EGH only - install 3/4” system blow-off (drain) valve in lowest
part of return piping close to boiler.
Condensate return —
• Satisfactory operation of a steam heating system depends
on adequate condensate return to boiler to maintain a
steady water level.
• Avoidaddingrawmakeupwater.
• Where condensatereturnisnotadequate,installlow
water cutoff/pump control, condensate receiver and
condensate boiler feed pump. Refer to Table 7, for sizing.
Connecting to parallel-flow piping
See Figure 18 for parallel-flow steam systems.
Connecting to counterflow piping
When connecting to a counterflow system, the boiler steam supply
must connect into the top of the counterflow system header, as
shown in Figure 19, page 18.
Figure 18 Recommended piping for parallel-flow systems
Table 7 Recommended steam boiler pipe sizing
Steam Boiler Piping Minimum Recommended Pipe Sizes
Boiler Model
Riser Pipe Size
Header *
H
Equalizer
J
A B
EG-30, 35
PEG-30, 35
2” –– 2” 1 ½”
EG-40, 45, 50
PEG-40, 45, 50
2 ½” –– 2 ½”
1 ½”
2” 2” 2 ½”
EG-55, 65, 75
PEG-55, 65
2” 2”
3” 1 ½”
3” ––
EGH-85, 95
2” 2” 3” 1 ½”
EGH-105
2 ½” 2 ½” 3” 1 ½”
EGH-115, 125
2 ½” 2 ½” 4” 1 ½”
* 24” minimum from waterline to bottom of header.
Connect piping – steam boilers (continued)
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