
168
NOTES FOR FIG. 70
19XR with Unit-Mounted VFD with ISM
I.
GENERAL
1.0 Variable Frequency Drive (VFD) Starters shall be designed
and manufactured in accordance with Carrier Engineering
Requirement Z-416.
1.1 All field-supplied conductors, devices, and the field
installation wiring, and termination of conductors and
devices, must be in compliance with all applicable codes
and job specifications.
1.2 The routing of field-installed conduit and conductors and
the location of field-installed devices must not interfere with
equipment access or the reading, adjusting, or servicing of
any component.
1.3 Equipment installation and all starting and control devices,
must comply with details in equipment submittal drawings
and literature.
1.4 Contacts and switches are shown in the position they would
assume with the circuit de-energized and the chiller shut
down.
1.5 WARNING — Do not use aluminum conductors.
1.6 Installer is responsible for any damage caused by improper
wiring between VFD and machine.
1.7 All field-installed wiring is field-supplied.
II.
POWER WIRING TO VFD
2.0 Provide a local means of disconnecting power to VFD.
Provide short circuit protection for the chiller and
interconnecting wire at the branch feeder. The short circuit
protection shall be fused type or equivalent circuit breaker.
2.1 Metal conduit must be used for the power wires from VFD to
branch feeder.
2.2 Line side power conductor rating must meet the VFD
nameplate voltage and chiller full load amps (minimum cir-
cuit ampacity).
2.3 Lug adapters may be required if installation conditions
dictate that conductors be sized beyond the minimum
ampacity required. Disconnect lugs will accommodate the
quantity (#) and size (MCM) cables (per phase) as indicated
in table below. If larger lugs are required, the lugs can be
purchased from Cutler-Hammer.
2.4 Compressor motor and controls must be grounded by using
equipment grounding lugs provided inside unit-mounted
VFD enclosure.
2.5 Metering current transformers (CTs), if present, have an
inner diameter of 2
3
/
4
in. Caution should be taken when
selecting power wiring so that all power cables can pass
through the CTs.
III. CONTROL WIRING
3.0 Field supplied control conductors to be at least 18 AWG or
larger.
3.1 Ice build start/terminate device contacts, remote start/stop
device contacts and spare safety device contacts (devices
not supplied by Carrier), must have 24 VAC rating. MAX
current is 60 mA, nominal current is 10 mA. Switches with
gold plated bifurcated contacts are recommended.
3.2 Each integrated contact output can control loads (VA) for
evaporator pump, condenser pump, tower fan low, tower fan
high, and alarm annunciator devices rated 5 amps at 115
VAC and up to 3 amps at 277 VAC.
Do not use control transformers in the control center as the
power source for external or field-supplied contactor coils,
actuator motors or any other loads.
3.4 Do not route control wiring carrying 30 v or less within a
conduit which has wires carrying 50 v or higher or along
side wires carrying 50 v or higher.
3.5 Spare 4-20 mA output signal is designed for controllers with a
non-grounded 4-20 mA input signal and a maximum input
impedance of 500 ohms.
3.8 Flow devices to confirm evaporator or condenser pump flow
are not required. However; if flow devices are used, wire as
shown in diagram below. Remove jumper installed at these
terminals and wire in a 4.3 K resistor in its place. The flow
device and resistor must be installed in parallel at these termi-
nals such that the resistor provides a signal when the flow
device is open.
CAUTION
To prevent damage to machine, do NOT punch holes or drill into
the top surface of the VFD enclosure for field wiring. Knockouts
are provided on the side of the VFD enclosure for field wiring
connections.
VFD
MAX INPUT
AMPS
STANDARD 65KAIC
LUG CAPACITY (PER PHASE)
NO. OF
CONDUCTORS
CONDUCTOR RANGE
390
3
2/0-400 MCM
CAUTION
Control wiring for Carrier to start pumps and tower fan motors
and establish flows must be provided to assure machine protec-
tion. If primary pump, tower fan, and flow control is by other
means, also provide parallel means for control by Carrier. Fail-
ure to do so could result in machine freeze-up or overpressure.
CCM
J
3
(LOWER)
Содержание AquaEdge 19XR series
Страница 69: ...69 Fig 33 19XR Leak Test Procedures a19 1625 ...
Страница 150: ...150 Fig 62 PIC II Control Panel Wiring Schematic Frame 2 3 4 and E Compressors without Split Ring Diffuser a19 1870 ...
Страница 152: ...152 a19 1871 Fig 63 PIC II Control Panel Wiring Schematic Frame 4 and 5 Compressors with Split Ring Diffuser ...
Страница 154: ...154 Fig 64 Benshaw Inc Wye Delta Unit Mounted Starter Wiring Schematic Low Voltage a19 1873 ...
Страница 161: ...161 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v ...
Страница 162: ...162 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v cont ...
Страница 163: ...163 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v cont a19 1880 ...
Страница 176: ...176 CONTINUED ON NEXT PAGE Fig 71 Typical Medium Voltage Variable Frequency Drive VFD Wiring Schematic cont a19 2064 ...
Страница 186: ...186 APPENDIX B LEAD LAG WIRING 19XR Lead Lag Schematic Series Cooler Flow a19 1655 ...
Страница 187: ...187 APPENDIX B LEAD LAG WIRING cont 19XR Lead Lag Schematic Parallel Cooler Flow a19 1717 ...