3
Table 1 RATINGS & DATA
Boiler Model
Number
(1)
AHRI Oil Burner
Input
(1)
Heating
Capacity
MBH
(4)
AHRI Net
Ratings
(2)(4)
A.F.U.E.
Rating
Min. Natural Draft
Chimney Size
G.P.H.
MBH
(4)
Water MBH
Round
Square
OBC3095
0.95
133
114
99
84.0
6
8x8x15
OBC4100
1.00
140
121
105
85.0
6
8x8x15
OBC4115
1.15
161
137
119
84.0
6
8x8x15
NOTES:
1. AHRI burner capacity is based on an oil heating value of 140,000 Btu/gal and with 13% CO
2
.
2. Net AHRI Water Ratings shown are based on a piping and pickup allowance of 1.15.
3. Consult manufacturer before selecting boiler for installations having unusual piping and pickup requirements,
such as intermittent system operation, extensive piping.
4. For forced hot water heating systems where boiler and all piping are within the area to be heated, select boiler
on basis of its Heating Capacity.
5. Nozzle listed for use with Beckett Burner.
6. Electrical service to be 120 Volts, 15 Amps, & 60 Hz.
STANDARD EQUIPMENT: Crated Boiler, Flush Jacket, Oil Burner, Target Wall/
Liner, Circulator-1¼", Safety Relief Valve, Temperature Pressure Gauge,
Drain Valve, Wiring Harness, Supply Tapping 1¼", Return Tapping 1¼", High
Limit and Circulator Control, Primary Control. For Tankless Heater Units-add
Low Limit.
RATINGS, DATA, AND DIMENSIONS
Table 2 TANK-LESS WATER HEATER CAPACITIES
Boiler
Model
Number
Input
Rate
G.P.H.
Tankless
Heater
Number
Tankless Heater
Capacity Intermittent
Draw G.P.M.
Boiler Water
Content
(Gallons)
OBC3095
0.95
L-24
3.25
6.7
OBC4100
1.00
L-24
3.25
8.2
OBC4115
1.15
L-24
4.00
8.2
Table 3 DIMENSIONS
Boiler No.
Length
of Flush
Jacket
Front of Jacket
to Center Line
of Flue Outlet
Flue
Outlet
Diameter
Tankless
Coil to Back
of Jacket
-A-
-B-
-C-
-D-
OBC3
19"
9 ¾"
6"
8
⅞
OBC4
23"
11¾"
6"
12¾
Figure 1 - Dimensions
