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Page 10
If the heater-to-tank circulating loop contains
more than 6 elbows or 30 feet of pipe, use
pipe or fittings in the loop no smaller than the
following:
Model
500 through 850
1010 through 1825
Pump performance requirements are provided in
Table 4 for reference purposes.
To assure free circulation, do not use globe
valves, side outlet tee connections or other
restrictive fittings in heater-to-tank loop.
2.
Copper Brute heaters are not suitable for heating
swimming pools or any other application where
temperature of the water flowing through the
heater remains below the dew point (110°F).
In applications requiring the rapid use of
measured volumes of water, the recovery of the
heater between the time intervals of use must
equal the volume used.
2.9 Water Pressure
It is very important that water pressure in the
system be maintained above 30 psi. If the system
pressure should drop below this, the vapor pressure
of water in the suction side of the pump can cause
hammer and cavitation in the pump and damage the
heater through lack of water circulation.
2.10 Tank Installation
1.
Be sure the floor is waterproof and structurally
capable of supporting the tank when it is filled
with water.
2.
The tank should be placed so that manholes,
inspection covers, nameplates and drain valves
are accessible.
3.
Be sure the tank is suitable for the water in the
system. Some water is corrosive and requires a
protected tank with a special lining.
4.
If the tank is glass-lined, it should be equipped
with a suitable magnesium anode. It is good
practice to replace the anode when it is
approximately 50% used. The factory warranty
on a glass-lined tank will be void if a satisfactory
anode is not in place at the time of a failure or if
it is consumed by cathodic action.
5.
Make sure the tank connections in the heater-
tank circulating loop are the proper size as listed
in Section 2.8. If tappings are smaller than the
recommended pipe size, a larger pump may be
required. Consult the factory if in doubt.
Pipe Size
2-1/2"
3"
* Pressure drop includes loss through 30 feet of pipe and normal fittings when
heater is installed with storage tank. Pipe and fittings are assumed to be 2" on
Models (500-850) and 2 1/2" on Models (1010-1825)
** To prevent erosion, these models must be ordered with cupro-nickel heat
exchanger tubes.
6.
7.
8.
Flow
Water
Rate
Model
Category
(GPM)
Soft
45
500
Normal
68
Hard
90
Soft
45
600
Normal
68
Hard
90
Soft
45
715
Normal
68
Hard
90
Soft
45
850
Normal
68
Hard
90
Soft
45
1010
Normal
68
Hard
90
Soft**
68
1200
Normal
68
Hard
90
Soft**
68
1430
Normal
68
Hard
90
Soft**
68
1670
Normal
68
Hard
90
Soft**
90
1825
Normal**
90
Hard
90
Water Category
Grain Hardness per Gal.
Soft
Normal
Hard
Table 4. Pump Performance Requirements.
Install a pipe in the tank drain fitting that goes to
a floor sink, and install a drain valve. If a floor
sink is not available, install a hose bib.
Hot water tanks in an existing installation are
likely to have a deposit of silt on the bottom.
Therefore, it is important to extend the pump
suction pipe in the tank to a position near the top.
Pipe the return from the heater to the bottom of
the tank.
Incorrect installation can cause rapid failure
of water tanks due to electrolysis. Tanks must
be installed with dielectric connections to
electrically isolate the tank from stray current.
Note that the use of brass or bronze connectors
does not replace the need for dielectric
connections.
BRADFORD WHITE
Head*
Temp. Rise
Loss
Across
(ft.)
Heater, (°F)
5.0
17
9.9
11
15.7
8
5.1
20
10.0
14
15.9
10
5.3
24
11.0
16
17.8
12
5.4
30
11.1
20
18.1
15
3.9
35
7.5
23
11.7
18
7.8
27
7.8
27
12.2
21
8.1
32
8.1
32
12.6
24
8.3
37
8.3
37
13.0
28
13.5
30
13.5
30
13.5
30
1 through 7.5
7.6 through 17
Over 17
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