Connect Piping - Steam Boilers - Weil-McLain EG 5 Series Manual

EG PEG
&
SERIES
Connect piping – steam boilers
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.
(Supply piping can be connected before or after jacket instal-
lation.) 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 —
on adequate condensate return to boiler to maintain a
steady water level.
water cutoff/pump control, condensate receiver and
condensate boiler feed pump. Refer to Table 5, page 16,
for sizing.
Connecting to parallel-flow piping
1. See Figure 18 for parallel-flow steam systems.
Connecting to counterflow piping
When connecting to a counterflow system, the boiler steam sup-
ply must connect into the top of the counterflow system header,
as shown in Figure 19.
Recommended steam boiler pipe sizing
Steam Boiler Piping Minimum Recommended Pipe Sizes
Boiler Model Riser Pipe Size
A
EG-30, 35
2"
PEG-30, 35
EG-40, 45, 50
2 ½"
PEG-40, 45, 50
EG-55, 65, 75
3"
PEG-55, 65
2"
EGH-85, 95
2 ½"
EGH-105
EGH-115, 125 2 ½"
*
´ PLQLPXP IURP ZDWHUOLQH WR ERWWRP RI KHDGHU
Part Number 550-142-782/1112
5 EGH 5
SERIES
*
Equalizer
Header
J
H
B
–– 2" 1 ½"
–– 2 ½" 1 ½"
–– 3" 1 ½"
2" 3" 1 ½"
2 ½" 3" 1 ½"
2 ½" 4" 1 ½"
-
GAS FIRED BOILERS
(continued)
Recommended piping for parallel-flow systems
—
BOILER MANUAL
17