PLUMBING e Continued from p 32
upper lip seal. The lip seal keeps debris or stringy
material away from the upper mechanical seal, and it is not hindered by the foreign material. The upper seal is a high quality unitized silicon carbide seal which provides hard seal faces that will not wear out. Silicon carbide seals are better and more reliable than ceramic-carbon seals used by other competitors. Starting circuit: In order to
provide the most power at startup,
grinder pumps typically have a separate starting circuit, which is assisted by its own capacitor. When the pump comes up to speed, the start circuit shuts off by means of a switch. The best pump-starting switch is one that won’t wear out. Some grinders have relays with coils and contacts that can wear out. The Omnivore has a solid state starting circuit without a relay. There are no contacts or coils to burn up after many cycles.
LSG-Series Omnivore Grinder Pump The Omnivore by Liberty is one of the industry’s newest 2 HP
grinder pumps with new Patented V-Slice® Cutter Technology. This new innovation provides more cuts per revolution for
superior shredding performance in demanding sewage applications. The hardened stainless steel cutting system provides in excess of 367,000 cuts per minute and aggressively shreds jeans, shop rags, diapers, sanitary napkins, and other difficult solids into fine slurry. A unique open volute design eliminates the cutwater-improving solids flow and reducing potential jamming of material in the volute. Other features include a one-piece cast iron body, quick-disconnect power cord,
34
stainless steel impeller, and dual shaft seals. Capacitors are integral to the pump, eliminating the need for an expensive control panel. Complete pre-assembled grinder systems are available and backed by Liberty’s 2-year limited warranty, or optional 5-year extended warranty.
Some pumps have a specific
pumping zone, and they can only operate within a specific pressure range. This is referred to as a pump with
a minimum head requirement. If it operates without enough backpressure, (referred to as head, or feet of lift) then it can end up "over- pumping" and can burn out the motor. The pump manufacturer always provides a performance curve. Look for a pump that can operate anywhere within its performance curve.
When Liberty set out to design a
new grinder pump, many considerations were taken into account. •What are the current problems
within the industry? •What product features are
desirable in a new grinder? •How could a product be
designed that would cover the most criteria in a single unit and still meet market needs? The Liberty Pumps marketing
e Continued on p 40
INTRODUCING THE ACCELERA© 300 HEAT PUMP WATER HEATER: ACCELERATE YOUR SAVINGS!
Energy from nature. New!
The new Accelera® 300 can extract up to 80% of its energy requirements from the air around it. Heat pumps have been around for decades, but a heat pump water heater is a brand new concept. The Accelera® 300 works like an air conditioner - but instead of dumping the heat outdoors, it puts it into the water.
The consume only 1 kWh of electricity
Accelera’s compressor and fan to
generate the heat equivalent of 3 – 5 kWh. The efficiency of the unit goes up with increasing ambient air
temperatures.
This ground breaking efficiency redefines what a water heater is capable of, and what savings can really mean !
FEDERAL TAX CREDIT: SAVE 30% UP TO $1,500
OF THE TOTAL SYSTEM COST!
SAVE ENERGYWATERMONEY
REDUCES HOT WATER COSTS BY UP TO 80 % COOLS AND DEHUMIDIFIES THE AIR AROUND IT LOW STAND-BY LOSSES THROUGH GOOD INSULATION
TOLL FREE 800.582.8423
www.stiebel-eltron-usa.com e Circle 21 on reader reply card Simply the Best
phc february 2011
www.phcnews.com
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