Specifications

44
NOTES:
1. All piping is schedule 40.
2. To prevent condensate from being trapped in header,
do not reduce
equalizer elbow at header connection.
3. Drain/blowoff valve — ball valve preferable, gate valve acceptable
alternative (supplied by others).
- Minimum valve size per ASME code is 1" NPT (V1104-1106), 1-1/4"
NPT (V1107-1112), 1-1/2" NPT (V1113-1123).
- Increasing the valve size will improve the blowdown operation
- In all cases, piping connecting blowoff valve to boiler shall be full
size to the point of discharge.
4. Header piping may be run over the top of boiler if space does not
allow for piping arrangement shown.
However, increased service requirements will result.
5. Supply from boiler header must be connected between the first boiler
riser and the header drip (or hartford loop). Do not connect supply
between risers or opposite end of boiler header.
6. For pumped return systems, see V11 installation manual.
'A'
'A'
'B'
'C'
'A'
'B'
'C'
'A'
'B'
'C'
'D'
18"
MIN.
24"
MIN.
HEADER
3
'E'
'D'
V1104 AND V1105
V1114 THRU V1117 V1118 THRU V1121 V1122 AND V1123
V1106 THRU V1109
'A'
'B'
V1 110 THRU V1113
EQUALIZER
CLOSE NIPPLE
HARTFORD LOOP
(REQ'D ON GRAVITY
RETURN SYSTEM)
4
RETURN
2
BLOWOFF/DRAIN VALVE
(SEE NOTE 3)
REAR OF BOILER
2" TO 4"
WATER LINE
SUPPLY
(SEE NOTE 5)
5
RISER
1
BOILER
MODEL
PIPING SIZE IN INCHES RISER SPACING IN INCHES
(1)
RISER
(QTY.) SIZE
(2)
RETURN
(3)
HEADER
(4)
EQUALIZER
‘A’ ‘B’ ‘C’ ‘D’ ‘E’
V1104
V1105
V1106
V1107
V1108
V1109
V1110
(1) 4
(1) 4
(2) 4
(2) 4
(2) 4
(2) 4
(3) 4
2
2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
4
4
6
6
6
6
6
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
—
—
31-1/8
37-1/4
43-3/8
49-1/2
24-3/4
—
—
—
—
—
—
30-7/8
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
V1111
V1112
V1113
V1114
V1115
V1116
V1117
(3) 4
(3) 4
(3) 4
(4) 4
(4) 4
(4) 4
(4) 4
3
3
3
3
3
3
3
8
8
8
8
8
8
8
4
4
4
4
4
4
4
37
37
37
24-3/4
24-3/4
30-7/8
30-7/8
24-3/4
30-7/8
37
24-1/2
24-1/2
36-3/4
36-3/4
—
—
—
30-7/8
37
24-3/4
30-7/8
—
—
—
—
—
—
—
—
—
—
—
—
—
—
V1118
V1119
V1120
V1121
V1122
V1123
(5) 4
(5) 4
(5) 4
(5) 4
(6) 4
(6) 4
3
3
3
3
3
3
8
10
10
10
10
10
4
4
4
4
4
4
30-7/8
30-7/8
30-7/8
30-7/8
30-7/8
30-7/8
24-1/2
24-1/2
24-1/2
24-1/2
24-1/2
24-1/2
24-1/2
24-1/2
36-3/4
36-3/4
24-1/2
24-1/2
24-3/4
30-7/8
24-3/4
30-7/8
24-1/2
24-1/2
—
—
—
—
24-3/4
30-7/8
V11 Series Piping Recommendations
Steam Boiler