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A module called the Flow Center circulates the fluid in the closed loop
system and through the geothermal unit. This device typically contains
one or two small pumps (1/6 hp circulators) that are engaged when the
unit is heating or cooling. Generally, one pump is used for units up
through 3 tons; two pumps are used for units from 3½ to 6 tons. How-
ever, some 4 to 6 ton applications may require only one pump depend-
ing on the loop’s pressure drop as E Series units have been designed
with heat exchangers to operate with single pump flow centers. Systems
larger than 6 tons may require a third pump, or the use of a single larger
pump, or possibly separate loops and pumps for each unit.
Units using well water do not use a flow center. Rather, they use the well
pump.
Maintenance
Flow centers and pumps require no regular maintenance. However, if you experience any of the following, contact
your dealer:
• Excessive frost buildup around pump or flow center cabinet.
• Leaking around the fittings.
• Air noise in the water piping.
• A pump that is too hot to touch.
• The unit will not operate without a fault light coming on and stopping operation.
DO NOT ATTEMPT TO SERVICE THE FLOW CENTER. IMPROPER SERVICE COULD RE-
SULT IN ELECTRICAL SHOCK, FLOODING, AIR ENTRAPMENT IN THE LOOP OR EQUIP-
MENT/SYSTEM FAILURE. CONTACT YOUR DEALER FOR PROPER SERVICE AND REPAIR.
Flow Center
PRODUCT INFORMATION FOR UNITS, OPTIONS & ACCESSORIES