46
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 chiller is available with
a unit-mounted, factory-installed starter or VFD (variable fre-
quency drive) (Fig. 29-31) or a free-standing, field-installed
starter or VFD (Fig. 32-36).
Unit-Mounted, Factory-Installed Starter or VFD
— Attach
power leads by connecting them from inside the starter cabinet
to the line side circuit breaker terminals. See Fig. 28-31.
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 740 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
position 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 accor-
dance with the National Electrical Code (NEC), applicable
local codes, and job wiring diagrams. Also, make sure cor-
rect phasing is observed for proper rotation.
NOTES:
1. All wiring must comply with applicable codes.
2. Wiring not shown for optional devices such as:
• Remote Start/Stop
• Remote Alarms
• Optional Safety Device
• 4 to 20 mA Resets
• Optional Remote Sensors
3. IMPORTANT: Carrier suggests that a structural engineer be
consulted if transmission of vibrations from mechanical equip-
ment is of concern.
4. Isolation valves are recommended on the cooler and condenser
piping to each chiller for service.
IMPORTANT: Wiring and piping shown are for general point- of-
connection only and are not intended to show details for a spe-
cific installation. Certified field wiring and dimensional diagrams
are available on request.
Fig. 29 — 19XR with Unit-Mounted Starter or VFD with ISM (Integrated Start Module)
a19-1597ef
LEGEND
1—Disconnect
2—Unit-Mounted Starter or VFD
3—Control Panel
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
(Low Fan, High Fan)
12 — Strainers
Piping
Control Wiring
Power Wiring
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