7442 SunCentric™ Solar Centrifugal High Volume Surface Pump

182watts, Max 20feet head

The SunCentric? uses solar-electric power to pump as much as 50,000 gallons (200 cu.m.) per day from shallow water sources. Applications include irrigation, livestock, domestic water, pond management, water treatment, swimming pools, solar water heating, hydronic space heating, fire protection, and more. These pumps have been in worldwide use since 1989. They can be used with or without batteries. No electronic pump controller is required. Maximum suction lift is 10 vertical feet (3 m). (Typical model shown here. Proportions and electrical connections vary.)

Recommendations by SunCentric? owners

"We are satisfied with the performance of the Conergy [SunCentric] Solar Centrifugal pump.. It runs cool and is noiseless. It has easy access for repair. The spring seals provided along with the pumps are also good. The pump starts at 40-50%of rated input to the motor. The pumps shipped so far are receiving good review and acceptance. "
Sairam Solar Systems, New Delhi, India

"We have 1000 trees on drip irrigation. [Our pump] has been running for 5 years. It's an amazing pump. I love that it runs directly on solar with no controller or batteries. "
A. P. , SunCentric owner, Longmont, Colorado, USA

"The SunCentric circulating pump is perfect. It starts first thing in the morning and there is absolutely no vibration or sound. "
Bob Ramlow, Midwest Renewable Energy Association, Wisconsin, USA
Application: Solar hydronic floor heating for a 4000 sq. foot (404 sq. m.) building.

PV Array-Direct Applications

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

Battery Applications

A battery system is best where:

• there is need for constant pressure or pressure on demand,
• a tank is not feasible, or
• a battery system is present for other power needs. Batteries can be charged by any power source.

Pump Installation

• Pump must be sheltered from rain and direct sunlight.
• Horizontal position: Place outlet at the top. It can be rotated to face horizontally or vertically upward.
• Vertical position: Place motor on top.

Pipe and Wire 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.
• Size the wire for less than 3% voltage drop. Undersized wire will greatly decrease pump performance. Refer to a low voltage wire sizing chart (available from Conergy).

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 routine maintenance is required.
• Pump can be repaired in the field using ordinary tools and skills, without removing the pipes.
• 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: 250°F (122°C)
• Impeller: brass
• Brass impeller reduces flow by about 15% (same watts)
• Order standard pump plus "High Temp Option" Item no.38275

Accessories

• Foot Valve (for pump placed higher than water source) 1 1/4inch (Item no.37205) or 1 1/2inch (no.37206) or 2inch (no.37207)
• Float switches: please inquire
• Basket Strainer: Swimming pool type, fits on pump inlet, easy cleanout. 1 1/4inch in/out, Item no.37685

Spare Parts

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

panels, rack separate.

See SunCentric chart for sizing.

Two years manufacturer warranty against defects in materials and workmanship.