Penn VFD68BBB, Installation Instructions Manual

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VFD68 Variable Frequency Drives (230 or 460 VAC)
22
0.5–4.5 VDC Ratiometric P499 Transducer
The default parameter values (Table 19 on page 27) on the VFD68 drive are configured to operate a
condenser fan motor on an R410 condensing unit, using a P499RCP-107 or P499RAP-107 ratiometric
transducer (or transducers). Wire one transducer for single circuit condensing systems. Wire two transducers
for dual circuit condensing systems (Figure 14).
The VFD68 has the ability to control motor speed using the higher input signal value of two voltage inputs
when you configure AI1 and AI2 as the same model transducer. For the high-input signal select application
with two transducers (Figure 14 on page 22 or Figure 15 on page 23), use the parameter values in Table 16
and see Adjusting the Default Parameters on page 33.
For high-pressure refrigerants other than R410a, you must calculate and change the C x parameters. For
medium and low pressure refrigerants, you must determine the proper P499R transducer and then calculate
and change the
C x parameters.
For more information, see Setup and Adjustment on page 25 and Parameter Settings Calculations for Motor
Speed vs. Pressure on page 31.
Table 16: Settings for Single or Dual 0.5–4.5 VDC Ratiometric Transducers
Setting Single Transducer Dual Transducer, High-Signal Select
P. 73
1
1. For information on parameters, see Table 19 on page 27.
1 (0–5 V) 1 (0–5 V)
P.266
1
1 (voltage input) 1 (voltage input)
P.267
1 1 (0–5 V) 1 (0–5 V)
Analog Input Terminal AI1 or AI2 AI1 and AI2
AI2 Mode Switch
2
2. See Figure 11 on page 19.
V V
IMPORTANT: If using two voltage input devices, both devices must be identical. Do not use input
devices with different ranges and operating characteristics.
Figure 14: Wiring 0.5–4.5 VDC Ratiometric Input Signal Transducers