Roberts Gorden 10081601NA Rev H 12/11 - Manual (Page 29)

SECTION 3: I NSTALLATION
23 of 62
3.5 Pump Requirements
The pump is powered directly from the Variable
Frequency Drive (VFD). The VFD will be energized
via an output from the relay board switched through a
designated relay.
3.6 Variable Frequency Drive Requirements
The VFD must be powered separately from the
control enclosure. The 230 V drive power supply
must be 230 V, 50-60 Hz, 1 Ø. The 120V drive power
supply must be 120 V, 50-60 Hz, 1 Ø. The 480 drive
power supply must be 480 V, 50-60 Hz, 3 Ø. See
Page 19, Section 2.7 for additional details. The VFD
on/off switching is done by an output on the relay
board. The 0-10 V signal from the ULTRAVAC™
controller enclosure wired into VFD input relays 5 and
2 (
see Page 26, Figure 13 through Page 28, Figure
14) will dictate the speed of the pump. The VFD
output supply to the pump is 230 V 3 Ø 0-60 Hz for
115 V and 230 V models and is 480 V, 3 Ø, 0-60 Hz
for 480 V models. The frequency of the output supply
signal to the pump will be varied based on the 0-10 V
signal from the control enclosure. See
Page 21, Sec-
tion 3.2 for additional installation requirements.
FIGURE 10: Variable Frequency Drive Mounting
(Standard enclosures only, NEMA 4 enclosure
mounting varies by model)
10" (25.4 cm)
14 .75"
(37.5 cm)