Completing The Installation; Checking The Installation; Oil Pump And Oil Heater; Carrier Comfort Network - Carrier 23XRV Installation Instructions Manual

COMPLETING THE INSTALLATION

This section provides instructions on how to perform a final
check of the installation. Do not energize the VFD circuit
breaker. This should only be done by qualified Carrier person-
nel in accordance with the 23XRV Start-Up and Service
Manual.
Checking the Installation —
cedure to verify the condition of the installation:
WARNING
DC bus capacitors in the VFD retain hazardous voltages
after input power has been disconnected. After disconnect-
ing input power, wait 5 minutes for the DC bus capacitors
to discharge then check both the VFD DPI communica-
tions interface board status LEDs and the VFD with a volt-
meter to ensure the DC bus capacitors are discharged
before touching any internal components. Failure to
observe this precaution could result in severe bodily injury
or loss of life.
1. Turn off, lock out, and tag the input power to the drive.
Wait five minutes.
2. Verify that there is no voltage at the input terminals (L1,
L2, and L3) of the power module.
3. a. For LF-2 VFD, verify that the status LEDs on the
DPI communications interface board are not lit.
See Fig. 68. The location of the communications
interface board is shown in Fig. 10.
b. For Std Tier VFD, verify that the keypad and drive
status indicators (Fig. 69) are not lit. The location of
the drive status indicator is shown in Fig. 11.
4. Remove any debris, such as metal shavings, from the
enclosure.
5. Check that there is adequate clearance around the
machine in accordance with the certified print.
6. Verify that the wiring to the terminal strip and the AC
input power terminals is correct.
7. Check that the wire size is within terminal specifications
and that the wires are tightened properly.
8. Check that specified branch circuit protection is installed
and correctly rated.
9. Check that the incoming power is rated correctly.
10. Verify that a properly sized ground wire is installed and a
suitable earth ground is used. Check for and eliminate any
grounds between the power leads. Verify that all ground
leads are unbroken.
Oil Pump and Oil Heater —
heater are wired at the factory. It is not necessary to connect
additional wiring to these components. See Fig. 72-74.
WARNING
Voltage to terminals T1 and T3 on the 1C and 6C contac-
tors comes from a control transformer in the starter built to
Carrier specifications. Do not connect an outside source of
control power to the chiller (terminals T1 and T3). An
outside power source will produce dangerous voltage at the
line side of the starter, because supplying voltage at the
transformer secondary terminals produces input level
voltage at the transformer primary terminals (see Fig. 63,
67, and 72-74).
Use the following pro-
The oil pump and oil
LEGEND
Factory Wiring
Power Panel Component Terminal
Contactor
Fig. 72 — Oil Pump Wiring
LEGEND
Factory Wiring
Power Panel Component Terminal
Fig. 73 — Oil Heater and Control Power Wiring
Fig. 74 — Oil Heater and Control Power Wiring,
Dual-Stage Oil Heater
Connect Control Wiring —
use shielded cable. Refer to the job wiring diagrams for cable
type and cable number. Make sure the control circuit is ground-
ed in accordance with applicable electrical codes and instruc-
tions on machine control wiring label.

Carrier Comfort Network

rier Comfort Network (CCN) communication bus wiring is
supplied and installed by the electrical contractor. It consists of
shielded, 3-conductor cable with drain wire.
The system elements are connected to the communication
bus in a daisy chain arrangement. The positive pin of each
system element communication connector must be wired to the
positive pins of the system element on either side of it. The
negative pins must be wired to the negative pins. The signal
ground pins must be wired to the signal ground pins. See
Fig. 70 for location of the CCN network connections on the
terminal strip labelled CCN.
NOTE: Conductors and drain wire must be 20 AWG (Ameri-
can Wire Gage) minimum stranded, tinned copper. Individual
conductors must be insulated with PVC, PVC/nylon, vinyl,
Teflon*, or polyethylene. An aluminum/polyester 100% foil
shield and an outer jacket of PVC, PVC/nylon, chrome vinyl,
or Teflon with a minimum operating temperature range of –4 F
to 140 F (–20 C to 60 C) is required. See Table 22 for cables
that meet the requirements.
*Registered trademark of DuPont.
68
a23-1595
a23-1596
All control wiring must
The Car-
®
Interface —