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Electrical Information cont.
Variable Speed Flow Center cont.
Two Pump Variable Speed Flow Center
If a variable speed two pump flow center is used, the flow center will come with four red and two green wires for the high voltage wiring.
The second set of (2) red and (1) green wires is provided for installation flexibility. The variable speed pump MUST be powered at all
times and therefore
MUST
be wired to the “L” side of electrical system or damage to the pump will occur (pump cannot be powered from
“T” side of compressor contactor). The UPMXL 25-124 pump has screw terminals for the high voltage connection. Connect the red HIGH
VOLTAGE wires to L1 and L2 on the AXB, connect the green GROUND wire to the ground lug, as shown in figure 4d. Follow all electrical
and local codes for wiring.
The variable speed UPMXL 25-124 pump also requires a low voltage signal to operate properly, if the low voltage signal isn’t present
the pump will run at 100%. Route the low voltage harness connected to the right hand pump to the AXB screw terminals on P2 and P3
connectors. Route the low voltage harness connected to the left hand pump to the AXB screw terminals on P2 and P3 connector per
figure 4c. The black wire on the left hand pump will have a label on it that reads
“DO NO CONNECT THIS WIRE. ONLY ONE VS PUMP
FEEDBACK SIGNAL CAN BE CONNECTED TO AXB BOARD”.
Both the low and high voltage harnesses are labeled. The pump will be automatically cycled as required either by the unit or by a signal
from another unit sharing the same flow center. Pumps are protected by circuit breakers as shown on the unit schematic.
NOTE
: Both pumps will speed up and slow down together.
AFFINITY SINGLE STAGE HYDRONIC WITH OPTIHEAT INSTALLATION MANUAL
Summary of Contents for AFFINITY OptiHeat YAW040
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