Connect Control Inputs; Connect Control Outputs - Carrier AquaEdge 19DV Series Installation Instructions Manual

Step 5 — Make Electrical Connections
Field wiring must be installed in accordance with job wiring
diagrams and all applicable electrical codes.
CAUTION
Do not run any hazardous voltage wiring in the control pan-
el sections associated with extra-low voltage wiring. Dam-
age to machine could occur as a result.
Wiring diagrams in this publication are for reference only and
are not intended for use during actual installation; follow job
specific wiring diagrams.
CAUTION
Do not attempt to start compressor or any motor (even for a
rotation check) or apply test voltage of any kind to the VFD
or motor while the chiller is under a dehydration vacuum.
Motor insulation breakdown and serious damage may result.
NOTE: The dry contacts for the field inputs should be located
as close to the unit as possible. The field wiring should be ca-
pable of preventing electrical noise or induced voltage and
should not be routed with any wires with voltage over 50 v.

CONNECT CONTROL INPUTS

Wiring may be specified for a spare safety switch, and a remote
start/stop contact can be wired to the terminal strip. Additional
spare sensors and control modules may be specified as well.
Carrier Comfort Network
®
the machine HMI panel as indicated in Fig. 16. The control
panel optional wiring and HMI component layout are shown in
Fig. 17.

CONNECT CONTROL OUTPUTS

Connect auxiliary equipment, chilled and condenser water
pumps, and spare alarms as required and indicated on job wir-
ing drawings. Terminal blocks 5TB and 6TB are factory wired
for low voltage field connections. With fourth IOB configured,
the hydraulic control function will be available; with this func-
tion, the water pump control and tower fan will be controlled
through the Carrier controller. It also will support three types
of water flow measurement: water flow switch, water flow me-
ter, and water pressure differential sensor. See Fig. 18-24.
(CCN) communication is wired to
CONNECT VFD
The 19DV chiller has a unit-mounted, factory-installed VFD
starter. Attach power leads by connecting them from inside the
VFD cabinet to the line side terminals (Fig. 25). See Table 14
for VFD conductor usage.
IMPORTANT: Be sure to ground the power circuit in accor-
dance with the National Electrical Code (NEC), applicable lo-
cal codes, and job wiring diagrams. Also, make sure correct
phasing is observed for proper rotation. The only acceptable
power supply to this chiller is a transformer with a wye second-
ary with solidly grounded neutral configuration. If there is a
different type of power supply, the chiller may require an isola-
tion transformer to be installed to prevent damage to the VFD.
Use the knockouts provided in the control panels for wiring
connections. Do not punch holes or drill into the top surface
of any control enclosure. Damage to machine could result
and could require component replacement.
NOTE: A suitable 24 VAC relay is Carrier part number
19XV05005503. Carrier recommends using a relay with a con-
tact rating of 10 amp sealed RMS or greater.
Do not punch holes or drill into the top surface of power
panel. Damage to machine could result. Use knockouts
provided in the bottom of the power panels for wiring
connections.
For a control transformer built to Carrier specifications, do
not connect an outside source of control power. 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 trans-
former primary terminals. Severe injury could result.
24
CAUTION
CAUTION
WARNING