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A module called the Flow Center circulates the fl uid 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.
However, some 4 to 6 ton applications may require only
one pump depending on the loop’s pressure drop as E
Series units have been designed with heat exchang-
ers to operate with single pump fl ow 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 fl ow 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 fl ow center cabinet.
•
Leaking around the fi ttings.
•
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
