36
Figure 32: Series 24 Minimum Piping Recommendation 2 - Water Boiler
Recommendation 2 — Use when:• system return water is not less than 135° F for prolonged periods of time
• system flow does impact flow through the boiler(ie. zoning, mixing)
NOTES:
1. All piping is schedule 40.
2. Pipe sizes listed are based on a 20°F or 40°F differential (temperature drop).
Select one to match application.
3. When specified return piping size is less than 3”, install 3” X 12” nipple and appropriate
size bell reducer directly into boiler return tapping as shown.
4. Drain valve — ball valve preferable, gate valve acceptable alternative
(supplied by others).
- Minimum valve size per ASME code is 3/4” NPT
5. Proper boiler circulator sizing is listed in Appendix B.
Pipe Sizing and Notes
LEDOM
YLPPUS
GNIPIP
)NI(EZIS
)1(
)NI(EZISGNIPIPNRUTER
)2(NRUTER
NRUTER
REDAEH
)A2(
NRUTER
HCNARB
)B2(EZIS).YTQ(
F°02
PORD
F°04
PORD
F°02
PORD
F°04
PORD
F°02
PORD
F°02
PORD
30-42
40-42
50-42
60-42
70-42
80-42
90-42
01-42
11-42
21-42
2
2
2
2/1-2
2/1-2
2/1-2
3
3
3
4
2/1-1
2/1-1
2/1-1
2/1-1
2
2
2
2/1-2
2/1-2
2/1-2
2
2
2
2/1-2
2/1-2
2/1-2
3
3
3
4
2/1-1
2/1-1
2/1-1
2/1-1
2
2
2
2/1-2
2/1-2
2/1-2
—
—
—
—
—
—
—
—
—
3
—
—
—
—
—
—
—
—
—
3)2(