Burnham BOILERS Specifications Page 43

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43
NOTES:
1. All piping is schedule 40.
2. Pipe size 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. Swing joints on two riser systems may be piped over the
top of the boiler if space is limited.
6. Boilers require protection from flue gas condensation and thermal
shock when operating below 135°F return water temperatures
Pipe Sizing and Notes
BOILER
MODEL
SUPPLY PIPING SIZE IN INCHES RETURN PIPING SIZE IN INCHES
(1)
SUPPLY
(1A)
SUPPLY
HEADER
(1B)
SUPPLY RISER
(QTY.) SIZE
(2)
RETURN
(2A)
RETURN
HEADER
(2B)
RETURN BRANCH
(QTY.) SIZE
20° F
DROP
40° F
DROP
20° F
DROP
40° F
DROP
20° F
DROP
40° F
DROP
20° F
DROP
40° F
DROP
20° F
DROP
40° F
DROP
20° F
DROP
40° F
DROP
V1104
V1105
V1106
V1107
V1108
V1109
V1110
2-1/2
2-1/2
2-1/2
3
3
4
4
2
2
2
2
2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
3
3
4
4
2
2
2
2
2
2-1/2
2-1/2
3
3
(2) 3
(2) 3
V1111
V1112
V1113
V1114
V1115
V1116
V1117
4
4
4
4
4
5
5
2-1/2
3
3
3
3
3
3
3
3
(2) 3
(2) 3
4
4
4
4
4
5
5
2-1/2
3
3
3
3
3
3
3
3
3
3
3
3
3
(2) 3
(2) 3
(2) 3
(2) 3
(2) 3
(2) 3
(2) 3
V1118
V1119
V1120
V1121
V1122
V1123
5
5
5
5
5
5
4
4
4
4
4
4
4
4
4
4
4
4
(2) 4
(2) 4
(2) 4
(2) 4
(2) 4
(2) 4
5
5
5
5
5
5
4
4
4
4
4
4
4
4
4
5
5
5
3
3
3
3
3
3
(3) 3
(3) 3
(3) 3
(3) 3
(3) 3
(3) 3
(2) 3
(2) 3
(2) 3
(2) 3
(2) 3
(2) 3
V11 Series Piping Recommendations
Water Boiler
GAS BOILERS
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