50Hqp With Supply Fan Vfd - Carrier Aquazone VQP 072 Installation, Start-Up And Service Instructions Manual

50HQP WITH SUPPLY FAN VFD

Units with the SAV or single speed VFD option include a VFD
TM
that ships loose for field installation. See Fig. 21 for field power
wiring for VFD. Use the following guidance for VFD installation:
NOTE: Installation must adhere to local codes and requirements.
1. Remove the VFD from the unit shipping storage location.
See Fig. 1.
2. Remove the VFD Box cover and locate the ABB VFD
installation manual.
3. Inspect the VFD and VFD Fuse Block. Ensure the fuses
are secured inside the VFD box. See Fig. 18 and 19.
4. Mount the VFD box using the mounting brackets to a suit-
able remote mounting location. See Fig. 20.
5. Disconnect unit power and remove the compressor and
electrical control box accesses panel on the unit.
See Fig. 21.
6. Make field wiring connections between terminal block 3
(TB3) (located in the unit electrical control box) and VFD
fuse block (FB1) (located in the VFD enclosure).
7. Make field wiring connections between terminals (U1, V1,
W1). Both located within VFD enclosure.
8. Make field wiring connections between VFD output termi-
nals (U2, V2, W2) (located in VFD enclosure) and
terminal block 4 (TB4) (located in the unit electrical con-
trol box).
NOTE: All remote VFD field wiring must be installed per local
codes and requirements. See Fig. 22-34 for typical wiring
diagrams.
WARNING
To avoid possible injury or death due to electrical shock, open
the power supply disconnect switch and secure it in an open
position during installation.
CAUTION
All power connections must be properly torqued to avoid the
risk of overheating.
CAUTION
The power supply ground wire should never be used as a
neutral wire.
Fig. 18 — Remote VFD Enclosure Components,
Fig. 19 — Remote VFD Enclosure Mounting,
19
50HQP Units
50HQP Units