44
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 two-stage chiller is
available with a free-standing, field-installed starter or VFD
(Fig. 26).
Assemble and install compressor terminal box in desired
orientation, and cut necessary conduit openings in conduit sup-
port plates. See Fig. 26 and 27. Attach power leads to
compressor terminals in accordance with job wiring drawings,
observing caution label in terminal box. Use only copper con-
ductors. The motor must be grounded in accordance with NEC,
applicable local codes, and job wiring diagrams. Installer is re-
sponsible for any damage caused by improper wiring between
starter and compressor motor. See Fig. 28-34 for VFD (vari-
able frequency drive), control, IOB (input/output board), and
ISM (integrated starter module) starter wiring diagrams.
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.
IMPORTANT: Do not insulate terminals until wiring
arrangement has been checked and approved by Carrier
start-up personnel. Also, make sure correct phasing is fol-
lowed for proper motor rotation.
Fig. 26 — 19XR Chiller with Free-Standing Starter
a19-2069
LEGEND
1—Disconnect
2—Free-standing Compressor Motor Starter
3—Compressor Motor Terminal Box
4—Power Panel
5—Control Panel
6—Vents
7—Pressure Gages
8—Chilled Water Pump
9—Condenser Water Pump
10 — Chilled Water Pump Starter
11 — Condensing Water Pump Starter
12 — Cooling Tower Fan Starter
(Low Fan, High Fan)
13 — Disconnect
14 — Oil Pump Disconnect (See Note 4)
15 — Strainer
Piping
Control Wiring
Power Wiring
NOTES:
1. 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 diagrams are available on request.
2. All wiring must comply with applicable codes.
3. Wiring not shown for optional devices such as:
• Remote Start/Stop
• Remote Alarms
• Optional Safety Device
• 4 to 20 mA Resets
• Optional Remote Sensors
4. Oil pump disconnect may be located within the enclosure of Item 2 —
Free-standing Compressor Motor Starter.
5. IMPORTANT: Carrier suggests that a structural engineer be consulted if trans-
mission of vibrations from mechanical equipment is of concern.
6. Isolation valves are recommended on the cooler and condenser piping to each
chiller for service.
7. Operating environment — Chiller should be installed in an indoor environment
where the ambient temperature is 40 to 104 F (4 to 40 C) with a relative humid-
ity (non-condensing) of 95% or less. To ensure that electrical components
operate properly, do not locate the chiller in an area exposed to dust, dirt, cor-
rosive fumes, or excessive heat and humidity.
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