Application Book: Heating Solutions for All Industries | Page 27
PROCESS CONTROL
CREATING MORE-EFFICIENT HVAC AND HEAT PUMP SYSTEMS
An effective way to reduce capital costs and add longevity to A/C systems
Application
An A/C compressor is one of the most important components of a
cooling system. It condenses refrigerant to a gas in order to move
it to other parts of the system. Without this component, the A/C
system can’t work.
When an A/C system, and specifically its compressor, is started-
up, there is a momentary surge in current. This occurs with all
electric motors due to the start-up resistance. The initial surge
can be several times higher than the “running” amperage. When a
main-power-grid is the power source, this is not an issue; however,
when the system is started by a back-up generator, the generator’s
power capacity must be able to handle the highest surge. If it does
not have the higher capacity, the inrush will “choke” the generator
and not allow it to start the system. The result is a requirement to
purchase a generator that is several times larger than the size/
capacity of the normal “running” current. The owner may need
to spend thousands of additional dollars simply to withstand
the momentary inrush current that is not required to operate the
system.
Solution
BriskHeat’s Surestart compressor soft starters reduce the inrush
current by 60% and automatically adjust the starting current to
match the compressor size and available supply voltage. This
eliminates the requirement to purchase expensive, oversize
generators, and allows the owner to purchase units that are rated
much closer to the lower, required operating amperage. For
example, an average-size 4 hp motor can create an inrush current
as high as 100 A, but with the addition of a soft starter, that
number is reduced to 40 A. So rather than purchasing a 24,000-
watt generator, the owner can purchase a 9,600-watt unit.
Types of Users
HVAC Contractors and Repair Technicians
Industry:
HVAC
Construction
Toll Free: 800-848-7673 | Phone: 614-294-3376 | BriskHeat.com | Email: [email protected] | Fax: 614-294-3807
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