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10
Installation and User’s Guide
Multiple Heat Pump Connections
All plumbing on multiple heat pump installations must be done in parallel see
Figures 9
and
10
. An equal flow
of water to each heat pump is important for optimum operation.
NOTE:
It may be necessary to adjust the water pressure switch if a unit is installed below the water
level. See
page 16
for details on when and how to adjust the pressure switch.
Each heat pump allows a maximum flow rate of 100 gpm (380 lpm) and requires a minimum of
30 gpm (110 lpm).
24 inches (610 mm) min. clearance around evap.
Extend 12" (305 mm)
past end heater
inlet for hydraulic
balancing
Extend 12" (305 mm)
past end heater
inlet for hydraulic
balancing
Pool Pump
Flow Meter
Minimum
2" PVC Pipe
2" PVC Pipe
Flow Meter
To Pool
OPTIONAL
2" Check Valve Bypass
Check Valves are
optional on heater inlets
but will help system
balancing
24"
(610 mm)
Figure 9.
Two Heat Pump Plumbing Layout
24 inches (610 mm) min. clearance around evap.
Extend 12"
(305 mm) past
end heater
inlet for hydraulic
balancing
Extend 12" (305 mm)
past end heater
inlet for hydraulic
balancing
Pool Pump
Flow Meter
Minimum
3" PVC Pipe
2" PVC Pipe
Flow Meter
To Pool
3" Ball Valve Bypass
Check Valves are
optional on heater inlets
but will help for system
balancing
24"
(610 mm)
2" PVC Pipe
2" PVC Pipe
2" PVC Pipe
3" PVC Pipe
3" PVC Pipe
Figure 10. Four Heat Pump Plumbing Layout
60 GPM (220 lpm)
Minimum
120 GPM (440 lpm)
Minimum
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