Carrier HERMETIC CENTRIFUGAL LIQUID CHILLERS 19XR - Manual (Page 30)

CONNECT CONTROL OUTPUTS — Connect auxiliary
equipment, chilled and condenser water pumps, and spare
alarms as required and indicated on job wiring drawings.
CONNECT STARTER — The 19XR is available with either
a unit-mounted, factory-installed starter or a free-standing,
field-installed starter (Fig. 28 and 29).
Unit Mounted, Factory-Installed Starter— Attach power leads
by connecting them from inside the starter cabinet to the line
side circuit breaker terminals. See Fig. 26 and 28. Machines
with electro-mechanical starters (wye-delta) will have a top
hat shipped with the machine if the RLA (rated load amps)
is greater than 935 amps. If the machine is equipped with a
solid-state starter, a top hat is provided if the RLA exceeds
740 amps. The top hat is shipped in the knocked-down po-
sition and must be assembled and installed on top of the starter
cabinet, over the line side circuit breaker. During assembly,
remove the access plate and use it as the cover piece of the
top hat. The top hat provides additional wire bending space
to attach line side power leads to the circuit breaker within
the starter.
IMPORTANT: Be sure to ground the power circuit in
accordance with the National Electrical Code (NEC),
applicable local codes, and job wiring diagrams. Also,
make sure correct phasing is observed for proper
rotation.
3
7
8
LEGEND
1 — Disconnect
2 — Unit Mounted Starter
3 — Control Cabinet
4 — Power Panel
5 — Vents
6 — Pressure Gages
7 — Chilled Water Pump
8 — Condenser Water Pump
9 — Chilled Water Pump Starter
10 — Condensing Water Pump Starter
11 — Cooling Tower Fan Starter
IMPORTANT: Wiring and piping shown are for general point-
of-connection only and are not intended to show details for a
specific installation. Certified field wiring and dimensional dia-
grams are available on request.
NOTES:
1. All wiring must comply with applicable codes.
2. Refer to Carrier System Design Manual for details regarding pip-
ing techniques.
3. Wiring not shown for optional devices such as:
• remote start-stop
• remote alarm
• optional safety device
• 4 to 20 mA resets
• optional remote sensors
Piping
Control Wiring
Power Wiring
Fig. 26 — 19XR with Optional Unit-Mounted Starter
30