3
Series 4N — Models 63 - 662
Dimensions
*Oil, Gas, Stoker Only - See note below rating table for hand-fired boilers.
**4” is IPS female thread, 6” and larger are flanged
Specifications, dimensions data subject to change without notice.
4N Boiler Models 63 78 92 107 127 154 180 209 240 277 311 345 397 463 563 662
A - Boiler Width
30-1/4 30-1/4 30-1/4 30-1/4 35-7/8 35-7/8 35-7/8 35-7/8 44-5/8 44-5/8 44-5/8 44-5/8 52-1/4 52-1/4 56 56
B - Boiler Length
30 37 43-1/2 50-1/2 42-1/2 51 59 68 55 63 70-1/2 78 76-3/4 89-1/4 100-3/8 118-1/4
C - Boiler Height
52-1/8 52-1/8 52-1/8 52-1/8 60-1/2 60-1/2 60-1/2 60-1/2 67-1/2 67-1/2 67-1/2 67-1/2 79-1/4 79-1/4 82 82
D - Base Width
29-3/4 29-3/4 29-3/4 29-3/4 35-1/8 35-1/8 35-1/8 35-1/8 43-7/8 43-7/8 43-7/8 43-7/8 50-1/8 50-1/8 54 54
E - Base Length
30-1/2 37-1/2 44 51 43 51-1/2 59-1/2 68-1/2 55-1/2 63-1/2 71 78-1/2 78-1/8 90-5/8 101-3/4 119-5/8
*F - Base Height
15 15 15 15 18 18 18 18 18 18 18 18 18 18 18 18
G - Front Smoke Box Height
22-3/4 22-3/4 22-3/4 22-3/4 24-7/8 24-7/8 24-7/8 24-7/8 30-5/8 30-5/8 30-5/8 30-5/8 33-5/8 33-5/8 36-3/4 36-3/4
H - Front Smoke Box Depth
6-1/2 6-1/2 6-1/2 6-1/2 7-1/2 7-1/2 7-1/2 7-1/2 8-1/2 8-1/2 8-1/2 8-1/4 8-1/4 8-1/4 9-3/4 9-3/4
J - Supply Location
12 12 12 12 15 15 15 15 18 18 18 18 26 26 26 26
**K - Supply Size
4 4 4 4 6 6 6 6 6 8 8 8 8 10 10 10
L - Return Size
3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4
M - Return Location
3-1/2 3-1/2 3-1/2 3-1/2 4 4 4 4 4 4 4 4 4-3/8 4-3/8 4-3/8 4-3/8
N - Smoke Box Depth - Top
Rear
8
16-1/2
8
16-1/2
8
16-1/2
8
16-1/2
9
20-1/2
9
20-1/2
9
20-1/2
9
20-1/2
10
22-1/2
10
22-1/2
10
22-1/2
10
22-1/2
16
16
16
16
16
16
16
16
P - Vent Collar Diameter
14 14 14 14 18 18 18 18 20 20 20 20 20 24 26 28
Q - Rear Vent Collar Height
33-7/8 33-7/8 33-7/8 33-7/8 40 40 40 40 46 46 46 46 51-1/2 51-1/2 52-3/8 52-3/8
R - Smoke Box Collar
Width Top Vent
— — — — — — — — — — — — 35-1/4 35-1/4 42-1/2 42-1/2
S - Smoke Box Collar
Depth Top Vent
— — — — — — — — — — — — 10 13 12 13
T - Top Vent Collar Height
41-7/8 41-7/8 41-7/8 41-7/8 49-1/8 49-1/8 49-1/8 49-1/8 57 57 57 57 64 64 66-7/8 66-7/8
U - Tube Pull Space
32 39 45-1/2 52-1/2 44-1/2 53 61 70 57 65 72-1/2 80 81 94 105 23
V - Supply Fitting Height
1-5/8 1-5/8 1-5/8 1-5/8 3-3/8 3-3/8 3-3/8 3-3/8 3-3/8 3-3/8 3-3/8 3-3/8 3-1/2 3-1/2 3-5/8 3-5/8
W - Normal Water Line Height
40-3/4 40-3/4 40-3/4 40-3/4 48-1/2 48-1/2 48-1/2 48-1/2 55 55 55 55 66-3/16 66-3/16 69 69
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