York YAFT026, Руководство по установке

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17
Variable Speed Flow Center
Single Pump Variable Speed Flow Center
If a variable speed single pump flow center is used, the flow center will come with two red and one green wires for the high
voltage wiring. 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). 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 17. The
low voltage wiring (PMW) will turn the pump(s) ON and OFF. 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 wires aren’t
connected or the signal isn’t present the pump will run at 100%. Route the low voltage harness connected to the pump to the
AXB screw terminals on P2 and P3 connectors per diagram 18.
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.
Figure 18: Single VS Pump Low Voltage Wiring
Electrical Information cont.
Figure 17: Single VS Pump High Voltage Wiring g g g g g
Aurora AXB ™
Aurora AXB
Note: Aurora AXB must be used to control
the UPMXL 25-124 pump.
AFFINITY & AFFINITY ADVANCED SINGLE & DUAL CAPACITY SERIES INSTALLATION MANUAL