Spec Sheet
NATURAL GAS AND LIQUID PROPANE GAS
Single Coil 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-DW4-U5036FRN
S-DW2-U65T6FRN
U.S.
Gal.
45
60
Imp.
Gal.
38
50
Nat.
BTU/Hr.
Input
40,000
55,000
Nat.
U.S.
GPH
43
57
Nat.
Imp.
GPH
36
47
59
1
/
4
63
233
272
22
24
Model
Number
Approx.
Shipping
Weight
kg.
A
Floor to
Flue
Conn.
mm.
B
Jacket
Dia.
mm.
Capacity Recovery at
50°C Rise*
S-DW4-U5036FRN
S-DW2-U65T6FRN
Liters
170
227
Nat.
kW
Input
19.1
19.1
Nat.
Liters/
Hour
163
216
1505
1600
F
Floor
to Top
of Heater
in.
56
1
/
4
59
1
/
2
F
Floor
to Top
of Heater
mm.
1429
1511
E
Floor
to Gas
Conn.
in.
11
5
/
8
11
5
/
8
E
Floor
to Gas
Conn.
mm.
295
295
D
Floor
to T&P
Conn.
in.
50
53
1
/
2
D
Floor
to T&P
Conn.
mm.
1270
1359
G
Floor
to Water
Conn.
in.
60
63
1
/
4
G
Floor
to Water
Conn.
mm.
H
Floor to
Solar
Collector
Supply
in.
H
Floor to
Solar
Collector
Supply
mm.
1524
1607
32
1
/
4
32
1
/
4
819
819
J
Floor to
Solar
Collector
Return
in.
J
Floor to
Solar
Collector
Return
mm.
10
1
/
8
10
1
/
8
257
257
K
Depth
in.
26
28
K
Depth
mm.
660
711
C
Vent
Size
in.
3
4
C
Vent
Size
mm.
76
102
106
123
559
610
EcoStor2
™
Indirect 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 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.
All models comply with the latest ultra-low NOx requirement of 10 ng/J or less.
*Based on manufacturers rated recovery efficiency.
Printed in U.S.A.
509-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
Heat Exchanger Pressure Drop Curve
Flow Rate (GPM)
Pressure Drop (PSID)
Head Loss (ft. w.c.)
16.00
14.00
12.00
10.00
8.00
6.00
4.00
2.00
0.00
7.00
6.00
5.00
4.00
3.00
2.00
1.00
0.00
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
A
C
B
G
F
H
E
J
D
Solar
Thermistor
Wires,
Gas Control
Sensor
Solar
Thermistor
Wires
ANODES
K
Solar Sensor
Wiring
Junction Box