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Dankoff Suncentric 7423 DC Surface Pump

Dankoff Suncentric 7423 DC Surface Pump
Dankoff Suncentric 7423 DC Surface Pump
Item code Model number
DAKSC-7423 SUNCENTRIC 7423

Untitled Document
SunCentric SunCentric Pumps

Dankoff
SunCentric Series Centrifugal Pumps
PV Direct and Battery Based Models

The SunCentric uses solar-electric power to pump as much as 50,000 gallons (200 m³) per day from shallow water sources.

Applications include irrigation, live stock, domestic water, pond management, water tr eatment, solar water heating, hydronic space heating and fire protection. These pumps have been in worldwide use since 1989. They can be used without batteries. Maximum suction lift is 10 vertical feet (3 m).

PV Direct Applications

  • A PV-direct system uses water storage instead of batteries. This is the simplest and most reliable system, and is easy to transport.
  • No electronic controls are required
  • A solar tracker (optional) will help to maintain optimum flow through the entire solar day
  • Storage of 3-7 days' water demand is recommended
  • Optimum for circulation of solar-heated water
  • Sump Pump

Battery Based Applications

  • A battery system is best where there is need for constant pressure or pressure on demand, or where a tank is not feasible, or where a battery system is required for other power applications.
  • Batteries can be charged by any power source

To choose the best pump for your application, select the appropriate chart of "PV Array-Direct Applications" or "Battery Applications".

  • Total Dynamic Head = Vertical distance from surface of the water source to the discharge or top of storage tank + pipe friction losses.
  • Use solid line grid for English units. Use broken line grid for metric units.
  • Locate the coordinates for the required head and flow.
  • Find the pump curve that is nearest to that point.
  • If there is more than one curve to chose from, compare the power requirements.
  • For PV-Direct systems, array sizing (watts) is critical. DO NOT undersize the array. ** For oversizing the array, you should have no more than 145% of the minimum pv watts required.

PV Direct Applications

SunCentric PV Direct Pumps

Battery Based Applications

SunCentric PV Direct Pumps

SunCentric PV-Direct Models
SunCentric Model Number System Voltage Minimum PV Array Power Consumption Max Amperage Rating Production
SC 7212 12V PV Direct 377 Watts 290 Watts @ 19.3 Amps 21.3 Amps 32.5gpm @ 5' TDH /
7.5 gpm @ 35' TDH
SC 7322
(battery capable)
24V PV Direct 377 Watts 290 Watts @ 9.7 Amps 10.6 Amps 32.5gpm @ 5' TDH /
5.0 gpm @ 35' TDH
SC 7323 12V PV Direct 100 Watts 77 Watts @ 5.1 Amps 5.6 Amps 17.5gpm @ 5' TDH /
7.5 gpm @ 10' TDH
SC 7324 12V PV Direct 177 Watts 90 Watts @ 6 Amps 6.6 Amps 21.0gpm @ 5' TDH /
12.5 gpm @ 10' TDH
SC 7325 12V PV Direct 144 Watts 111 Watts @ 7.4 Amps 8.1 Amps 29.0gpm @ 5' TDH /
16.5 gpm @ 10' TDH
SC 7423
(battery capable)
24V PV Direct 558 Watts 429 Watts @ 14.3 Amps 15.7 Amps 46.0gpm @ 10' TDH /
7.5 gpm @ 45' TDH
SC 7424 24V PV Direct 624 Watts 480 Watts @ 16 Amps 17.6 Amps 52.5gpm @ 5' TDH /
19.0 gpm @ 45' TDH
SC 7442
(battery capable)
36V PV Direct 205 Watts 158 Watts @ 3.5 Amps 3.9 Amps 25.0gpm @ 5' TDH /
19.0 gpm @ 20' TDH
SC 7443
(battery capable)
36V PV Direct 229 Watts 176 Watts @ 3.9 Amps 4.3 Amps 32.5gpm @ 5' TDH /
12.5 gpm @ 20' TDH
- 48V PV Direct 558 Watts 429 Watts @ 7.2 Amps 7.9 Amps 46.0gpm @ 10' TDH /
7.5 gpm @ 45' TDH
SC 7444 48V PV Direct 624 Watts 480 Watts @ 8 Amps 8.8 Amps 52.5gpm @ 5' TDH /
19.0 gpm @ 45' TDH
SC 7445
(battery capable)
24V PV Direct 144 Watts 111 Watts @ 3.7 Amps 4.1 Amps 29.0gpm @ 5' TDH /
16.5 gpm @ 10' TDH
SC 7446
(battery capable)
36V PV Direct 404 Watts 311 Watts @ 6.9 Amps 7.6 Amps 50.0gpm @ 5' TDH /
7.5 gpm @ 30' TDH
SC 7521
(battery capable)
36V PV Direct 959 Watts 738 Watts @ 16.4 Amps 18 Amps 39.5gpm @ 5' TDH /
7.5 gpm @ 80' TDH
SC 7526 24V PV Direct 952 Watts 732 Watts @ 24.4 Amps 26.8 Amps 70.0gpm @ 5' TDH /
9 gpm @ 60' TDH
SC 7622
(battery capable)
36V PV Direct 1112 Watts 855 Watts @ 19 Amps 20.9 Amps 50gpm @ 10' TDH /
10 gpm @ 85' TDH
SC 7623 36V PV Direct 1416 Watts 1089 Watts @ 24.2 Amps 26.6 Amps 52gpm @ 10' TDH /
16 gpm @ 90' TDH
SunCentric Battery Based Models
SunCentric Model Number System Voltage Power Consumption Max Amperage Rating Production
SC 7212
(PV Direct Capable)
12V Battery 168 Watts @ 14 Amps 15.4 Amps 22.5gpm @ 5' TDH /
7.5 gpm @ 20' TDH
SC 7213 12V Battery 187 Watts @ 15.6 Amps 17.1 Amps 31.0gpm @ 5' TDH /
13 gpm @ 20' TDH
SC 7214 12V Battery 204 Watts @ 17 Amps 18.7 Amps 34.0gpm @ 5' TDH /
7.5 gpm @ 25' TDH
SC 7321 24V Battery 168 Watts @ 7 Amps 7.7 Amps 22.5gpm @ 5' TDH /
7.5 gpm @ 20' TDH
SC 7322
(PV Direct Capable)
24V Battery 199 Watts @ 8.3 Amps 9.1 Amps 29.0gpm @ 5' TDH /
7.5 gpm @ 25' TDH
SC 7415 12V Battery 283 Watts @ 25.9 Amps 28.6 Amps 39.0gpm @ 5' TDH /
17.5 gpm @ 25' TDH
SC 7423
(PV Direct Capable)
24V Battery 259 Watts @ 10.8 Amps 11.9 Amps 39.0gpm @ 5' TDH /
18 gpm @ 25' TDH
SC 7424
(PV Direct Capable)
24V Battery 286 Watts @ 11.9 Amps 13.1 Amps 41.0gpm @ 5' TDH /
14 gpm @ 30' TDH
SC 7425 24V Battery 346 Watts @ 14.4 Amps 15.9 Amps 54.0gpm @ 5' TDH /
17.5 gpm @ 30' TDH
SC 7426 24V Battery 397 Watts @ 16.3 Amps 17.9 Amps 55.0gpm @ 5' TDH /
19.0 gpm @ 35' TDH
SC 7442
(PV Direct Capable)
48V Battery 182 Watts @ 3.8 Amps 4.2 Amps 29.0gpm @ 5' TDH /
7.5 gpm @ 25' TDH
SC 7443
(PV Direct Capable)
48V Battery 206 Watts @ 4.3 Amps 4.7 Amps 34.0gpm @ 5' TDH /
7.5 gpm @ 25' TDH
SC 7446
(PV Direct Capable)
48V Battery 374 Watts @ 7.8 Amps 8.6 Amps 54.0gpm @ 5' TDH /
17.5 gpm @ 30' TDH
SC 7511 24V Battery 650 Watts @ 27.1 Amps 29.8 Amps 36.0gpm @ 5' TDH /
7.5 gpm @ 80' TDH
SC 7521
(PV Direct capable)
24V Battery 638 Watts @ 13.5 Amps 14.9 Amps 36.0gpm @ 5' TDH /
7.5 gpm @ 80' TDH
SC 7622
(PV Direct capable)
48V Battery 974 Watts @ 20.3 Amps 22.3 Amps 52.0gpm @ 10' TDH /
16 gpm @ 90' TDH

Suction Capacity

  • Suction limit is 10 vertical feet (3 m) at sea level-subtract 1 foot for every 1000 ft. elevation (1 m per km).
  • For best reliability, place the pump low and close to the water source to minimize or eliminate suction.

Pump Placement

  • Place the pump close to the water source to minimize suction lift. This will minimize the possibility of cavitation which causes excessive wear and loss of performance.
  • Horizontal position: Place outlet at the top. It can be rotated to face horizontally or vertically upward.
  • Vertical position: Place motor on top.
  • Pump must be sheltered from rain and direct sunlight.

Wire and Pipe Requirements

  • Intake pipe: Pipe should be as direct and short as possible. Avoid any high point that can trap an air pocket.
  • Refer to a pipe sizing chart (included with the pump instructions). Pipe may need to be larger than the pump ports. Undersized pipe will greatly decrease pump performance.
  • Refer to a low voltage wire sizing chart. Size the wire for less than 3% voltage drop. Undersized wire will greatly decrease pump performance.

Dimensions, Pipe Fitting Sizes, Shipping Weight

PUMP MODEL NUMBER DIMENSIONS PIPE SIZE
LENGTH
in.
HEIGHT
in.
SHIP WT
in.
INLET
in.
OUTLET
in.
72x1 72x2 72x3 72x4
72x5
72x6
15.5
17
17
9.1
10.5
10.5
49
54
54
1 1/4"
1 1/2"
2"
1"
1 1/4"
1 1/2"
73x1 73x2 73x3 73x4
73x5
73x6
17
18
18
9.1
10.5
10.5
50
55
55
1 1/4"
1 1/2"
2"
1"
1 1/4"
1 1/2"
74x1 74x2 74x3 74x4
74x5
74x6
17
18.5
18.5
9.1
10.5
10.5
58
63
63
1 1/4"
1 1/2"
2"
1"
1 1/4"
1 1/2"
75x1 75x2 75x3 75x4
75x5
75x6
18
19.5
19.5
9.1
10.5
10.5
60
65
65
1 1/4"
1 1/2"
2"
1"
1 1/4"
1 1/2"
76x1 76x2 76x3 76x4
76x5
76x6
19
20.5
20.5
9.1
10.5
10.5
65
70
70
1 1/4"
1 1/2"
2"
1"
1 1/4"
1 1/2"

Overcurrent Protection

  • Fuse or circuit breaker is required.
  • Ampere rating = amps at the pump + 15-25%
  • Minimum DC voltage rating = volts at the pump X 2. (Type FRN fuses are rated 125V DC)

Maintenance

  • No regular maintenance is required.
  • Pump can be repaired in the field using ordinary tools and skills, without removing the pipes.
  • Instruction manual shows illustrated repair details.
  • Motor brushes: Typical brush life peak hours = working voltage X 800 / 3rd digit of model number. EXAMPLE: PV-Direct curve #60 is Model 7526 working at 30V. Typical brush life = 30 X 800 / 2 = 12,000 peak hours. This represents about 5-8 years of service.
  • Shaft seal has a very long life under normal conditions. Purchase spare seals if water is loaded with abrasive silt or if pump can possibly run dry.

Materials

  • Pump body: cast iron, ASTM A48-76
  • Impeller: glass filled polycarbonate
  • Seal: carbon/ceramic, industry standard
  • Temperature limit: 140°F (60°C)

High Temperature Option

  • Temperature limit: 212°F (100°C)
  • Impeller: brass
  • Brass impeller reduces flow by approximately 15% (power is same)
  • Make sure to request the HIGH TEMPERATURE version of the pump in the comments section of your order.

Accessories

  • Foot Valve (required if pump is placed higher than water source)
  • Float switches: please inquire

Spare Parts

  • Seal & Gasket Kit: specify pump number, and if high temperature
  • Motor Brush Kits: specify model number

Warranty

  • Two years against defects in materials and workmanship.

Here are some tips from the altE staff

  • How can I tie in a float switch to the circuit of a Suncentric pump if I can't use an LCB?
    • You have a few options: Use our high current float switch, which uses a mercury contactor to provide better arc quenching. Depending upon the array voltage and motor current, you should still expect pitting of the switch contacts and occasional switch replacements. Second option, install a parallel micro system which charges a battery, which is used to drive a relay (such as a mercury contactor). However, the cheapest/fastest and generally best way is to just plumb an overflow pipe back to the source or to a useful need, and just let the pump run.
  • Should I use a linear current booster with the Suncentric pumps?
    • No. LCBs improve the performance of pumps in less than optimal light conditions by reducing the voltage from the solar array to increase the current to the pump. Many DC pumps can run on a range of different voltages, but not the Suncentric - it needs to run at a voltage that is pretty close to its nominal voltage. Therefore, the use of an LCB with a Suncentric pump is discouraged.
  • Can I use a dry run switch with a Suncentric pump?
    • The DRS from the Booster/Slowpumps can't work with the SunCentric because a centrifugal pump doesn't get hot when it runs dry. You must use some sort of level switch, like a float switch if you believe there is any possibility of running dry. However, that adds another level of complexity because float switches need to be replaced occasionally when used to interrupt the power in array direct applications (especially at the current and voltage levels of the SunCentric line), and you can't use a relay in an array direct app unless you have some other power source to power the relay. It's better to design a system that can't run dry, or if it does on rare occasions, expect to replace seals when it does.

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