Bradford White S-DW2-U65T6FRN - Manual (Page 6)

Heat Exchanger Specifications
Heat Exchanger Pressure Drop Curve
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Flowrate (GPM)
To
ta
l P
re
s
s
u
re
D
rop
(P
S
ID
)
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
T
o
ta
l
H
ead
L
o
ss
(F
eet
)
DOUBLE-WALL HEAT EXCHANGER – The solar water heater has a double-wall heat exchanger with a
slight gap between the two tubes that makes up the heat exchanger coil. The ¾” female fitting provides an
atmospheric vent for any fluid that enters the gap between the tubes. The heat exchanger has 14.2 ft
2 of heat
transfer surface area.
SENSOR WIRES FOR SOLAR THERMISTOR CONNECTIONS – Twisted wires are provided under the
lower and upper covers. These wires have been provided as a means for connecting thermistors to a solar
controller. NOTICE: Neither the solar controller nor the thermistors are provided with the solar water
heater and must be purchased separately. The lower thermistor wires connect a thermistor for use in
comparison to the solar collector temperature to determine if an appropriate temperature difference for heat
transfer is available. A bracket to fix the thermistor against the tank wall is supplied. The upper thermistor
wires are an optional second thermistor connection to monitor the upper tank temperature. Some solar
controllers provide this option.
BROWN WIRE
THERMISTOR
(NOT INCLUDED)
BRACKET
WIRE NUTS
COVER
OPENING
SENSOR PLATE
ORANGE WIRE
THERMISTOR
(NOT INCLUDED)
BRACKET
WIRE NUTS
COVER
OPENIN
SENSOR PLATE
3/4" 3/4" SPUD