Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual page 71

LEGEND AND NOTES FOR FIG. 43,
19XR WITH FREE-STANDING STARTER (MEDIUM VOLTAGE)
REF. NO.
3 Phase Under/Over Voltage
Phase Loss/Imbalance/Reversal
Motor Overload Protection
Frequency Shift
kW Transducer/kW Hours/Demand kW
Single Cycle Dropout
Motor/Starter Overcurrent
Control Power Transformer (3KVA) (Integral)
Controls and Oil Heater Circuit Breaker (integral)
1
Oil Pump Circuit Breaker
Oil Pump Circuit Breaker with Transformer
3 Phase Analog Volts/Amps Meter Package
Power Factor Correction Package
Lightning/Surge Arrestor Package
Auxiliary Run Status Contacts N.O./N.C.
Run Indicating Light
Emergency Stop Switch
Phase to Ground Fault Detection
2 Compressor Motor Starter Branch Disconnect
A Evaporator Liquid Pump Starter Disconnect
B Evaporator Liquid Pump Motor Starter
C Condenser Liquid Pump Starter Disconnect
D Condenser Liquid Pump Motor Starter
E Cooling Tower Fan Motor Starter Disconnect (Low Fan/#1)
F Cooling Tower Fan Motor Starter (Low Fan/#1)
G Cooling Tower Fan Motor Starter Disconnect (High/#2)
H Cooling Tower Fan Motor Starter (High Fan/#2)
L Remote Alarm See Note 3.3
M Remote Annunciator See Note 3.3
N Lug Adapters See Note 2.1
I. GENERAL
1.0 Starters shall be designed and manufactured in accordance
with Carrier Engineering Requirement Z-415.
1.1 All field-supplied conductors, devices, and the field installation
wiring, termination of conductors and devices, must be in com-
pliance with all applicable codes and job specifications.
CAUTION
To prevent damage to machine, do NOT punch holes or drill into the
top surface of the starter enclosure for field wiring. Knockouts are pro-
vided on the side of the starter enclosure for field wiring connections.
1.2 The routing of field-installed conduit and conductors and the loca-
tion 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 chiller shutdown.
1.5 WARNING — Do not use aluminum conductors.
1.6 Installer is responsible for any damage caused by improper wir-
ing between starter and machine.
1.7 All field-installed wiring is field-supplied.
II. POWER WIRING TO STARTER
2.0 Provide a means of disconnecting power to starter.
2.1 Lug adapters may be required if installation conditions dictate that
conductors be sized beyond the minimum ampacity required.
Contact starter supplier for lug information.
2.2 Compressor motor and controls must be grounded by using
equipment grounding lug provided inside starter enclosure.
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, nom-
inal current is 10 mA. Switches with gold-plated bifurcated con-
tacts are recommended.
EXPLANATION
3.2 Each integrated contact output can control loads (VA) for evap-
orator 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.
Control wiring for Carrier to start pumps and tower fan motors and
establish flows must be provided to assure machine protection. If
primary pump, tower fan, and flow control is by other means, also
provide parallel means for control by Carrier. Failure to do so could
result in machine freeze-up or overpressure.
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.
3.3 Do not route control wiring carrying 30 v or less within a con-
duit which has wires carrying 50 v or higher or along side wires
carrying 50 v or higher.
3.4 Control wiring between starter and control panel must be separate
shielded cables with minimum rating 600 v, 80 C. Ground shield at
starter.
3.5 If optional circuit breaker is not supplied within the starter enclo-
sure, it must be located within sight of machine with wiring routed
to suit.
3.6 When providing conductors for oil pump motor and oil heater
power, refer to sizing data on label located on the chiller control
panel, equipment submittal documentation, or equipment product
data catalog.
3.7 Spare 4-20 mA output signal is designed for controllers with a
non-grounded 4-20 mA input signal and a maximum input imped-
ance of 500 ohms.
IV. POWER WIRING BETWEEN FREE-STANDING STARTER AND
COMPRESSOR MOTOR
4.0 Low voltage (below 600 volts) compressor motors have (6) termi-
nals and medium/high voltage (above 600 volts) have (3) termi-
nals. Medium voltage (over 600 volts) compressor motors have (3)
terminals. Motor terminal connections between 1kV and 5 kV are
3 / -in. threaded and above 5 kV they are
4
medium/high voltage terminations the supplied 3 adapters should
be used for connecting a NEMA lug for two 1/2 in stud connec-
tions per phase.Use suitable connectors and insulation for high
voltage alternating current cable terminations (these items are not
supplied by Carrier). Compressor motor starter must have name-
plate stamped as to conforming with Carrier Engineering require-
ment "Z-415."
4.1 Power conductor rating must meet minimum unit nameplate volt-
age and compressor motor RLA. Refer to the label located on the
side of the chiller control panel, equipment submittal documenta-
tion, or equipment product data catalog for conductor sizing data.
(Conductor as defined below may be a single lead or multiple
smaller ampacity leads in parallel for the purpose of carrying the
equivalent or higher current of a single larger lead.)
When (3) conductors are used:
Minimum ampacity per conductor = 1.25 x compressor RLA
4.2 When more than one conduit is used to run conductors from
starter to compressor motor terminal box, an equal number of
leads from each phase (conductor) must be in each conduit to
prevent excessive heating. (For example, conductors to motor ter-
minals 1, 2, and 3 in one conduit, and those to 4, 5, and 6 in
another.)
4.3 Compressor motor power conductors may enter terminal box
through top, left side, or bottom left using holes cut by contractor to
suit conduit. Flexible conduit should be used for the last few feet to
the terminal box for unit vibration isolation. Use of stress cones
may require an oversize (special) motor terminal box (not supplied
by Carrier).
4.4 Compressor motor frame to be grounded in accordance with the
National Electrical Code (NFPA-70) and applicable codes. Means
for grounding compressor motor is a #4 AWG to 500 MCM pres-
sure connector, supplied and located in the lower left corner of the
compressor motor terminal box.
4.5 Do not allow motor terminals to support weight of wire cables.
Use cable supports and strain reliefs as required.
4.6 Use 2 wrenches to tighten:
- Terminal insulator to motor - 15-35 ft-lb
- Brass nut to terminal insulator (medium/high voltage) - 3 ft-lb
max
- Adapter to terminal stud:
a) 9/16" stud - 30-35 ft-lb
b) 3/4" stud - 35-40 ft-lb
- For low voltage terminal box busbar connection clamp bus-
bar between 1-1/2" nuts - 130-150 ft-lb (see separately field
supplied low voltage terminal box installation instructions).
71
CAUTION
9 / -in. threaded stud. For
16