Spec Sheet
NATURAL GAS AND LIQUID PROPANE GAS
Gas Backup Models
Meet or exceed ASHRAE 90.1b (current standard)
80% Recovery Efficiency
Model
Number
Approx.
Shipping
Weight
lbs.
A
Floor to
Flue
Conn.
in.
B
Jacket
Dia.
in.
Capacity Recovery at
90°F Rise*
S-2-TW65T6FBN
S-2-TW75T6BN
U.S.
Gal.
65
75
Imp.
Gal.
54
62
Nat.
BTU/Hr.
Input
70,000
76,000
LP
BTU/Hr.
Input
63,000
75,500
Nat.
U.S.
GPH
75
82
Nat.
Imp.
GPH
62
68
LP
U.S.
GPH
68
81
LP
Imp.
GPH
57
67
63
62
3
/
8
225
260
24
26
Model
Number
Approx.
Shipping
Weight
kg.
A
Floor to
Flue
Conn.
mm.
B
Jacket
Dia.
mm.
Capacity Recovery at
50°C Rise*
S-2-TW65T6FBN
S-2-TW75T6BN
Liters
246
283
Nat.
kW
Input
20.5
22.3
LP
kW
Input
18.5
22.1
LP
Liters/
Hour
257
307
Nat.
Liters/
Hour
284
310
1600
1584
F
Floor
to Top
of Heater
in.
59
1
/
2
59
F
Floor
to Top
of Heater
mm.
1511
1499
E
Floor
to Gas
Conn.
in.
11
3
/
8
14
1
/
8
E
Floor
to Gas
Conn.
mm.
289
359
D
Floor
to T&P
Conn.
in.
53
1
/
2
52
D
Floor
to T&P
Conn.
mm.
1359
1321
G
Floor
to Water
Conn.
in.
60
1
/
4
59
3
/
4
G
Floor
to Water
Conn.
mm.
H
Floor to
Solar
Collector
Supply
in.
H
Floor to
Solar
Collector
Supply
mm.
1530
1518
32
1
/
4
34
5
/
8
819
879
J
Floor to
Solar
Collector
Return
in.
J
Floor to
Solar
Collector
Return
mm.
10
1
/
8
12
1
/
2
257
318
K
Depth
in.
28
30
3
/
8
K
Depth
mm.
711
772
C
Vent
Size
in.
3
3
C
Vent
Size
mm.
76
76
102
118
610
660
EcoStor
™
Open Loop Water Heater System
General
All gas water heaters are certified at 300 PSI test pressure (2068 kPa) and 150 PSI working pressure (1034 kPa). All potable water and electrical
connections are 3⁄4" NPT (19mm) on 11" (279mm) centers. All models design certified by CSA International (formerly AGA/CGA), ANSI Z-21.10.1 and 10.3
and peak performance rated.
Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.
Suitable for Water (Potable) Heating and Space Heating.
Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into the potable side of this system. The potable side may NEVER be
connected to any existing heating system or component(s) previously used with a non-potable water heating appliance.
Propane models feature a Titanium Stainless Steel propane burner. For Propane (LP) models change suffix "BN" to "SX".
*Based on manufacturers rated recovery efficiency.
120 V.A.C. required for power venting.
120 V.A.C. 60HZ 3.1 Amperes.
Printed in U.S.A.
511-B-0914-A
©2014, Bradford White Corporation. All rights reserved.
Ambler, PA
For U.S. and Canada field service, contact your professional installer or local Bradford White sales representative.
Sales 800-523-2931
●
Fax 215-641-1670 / Technical Support 800-334-3393
●
Fax 269-795-1089
●
Warranty 800-531-2111
●
Fax 269-795-1089
International: Telephone 215-641-9400
●
Telefax 215-641-9750 / www.bradfordwhite.com
Sales / Technical Support 866-690-0961 / 905-238-0100
●
Fax 905-238-0105 / www.bradfordwhite.com
3"
Vent Pipe
4"
Vent Pipe
S-2-TW65T6FBN
S-2-TW75T6BN
†
60 ft.
7 ft.
55 ft.
50 ft.
45 ft.
** †
180 ft.
15 ft.
175 ft.
170 ft.
165 ft.
Max. Equivalent Length
Min. Equivalent Length
Number 1
of 2
90° Elbows 3
Subtract 5ft. for each additional 90° elbow
†For high altitude installations, consult the
installation instructions.
** S-2-TW-75 Max. 3" vent length is
50 ft. (15.24 m)
B
A
G
F
H
E
J
D
B
Solar
Thermistor
Wires
and Gas
Control Sensor
Under Cover
From Solar
Collector
Solar
Thermistor
Wires
Under Cover
To Solar
Collector
K
Anode
Hot Water
Outlet
Cold Water
Inlet
From Solar
Collector
Solar
Sensor
Wiring
Junction
Box