Carrier HFC-134A installation instructions Model Number Identification

	S – Special
23XRV – High Efficiency	Not Used
Variable Speed Screw Chiller
Cooler Size*	Voltage Code
	3 – 380-3-60
30-32
	4 – 416-3-60
35-37
	5 – 460-3-60
40-42
	9 – 400-3-50
45-47
50-52	Drive	Rectifier Max	Inverter Max
55-57
	Frame	Input Amps†	Output Amps†
Condenser Size*	AA	440	442
	BA	520	442
30-32	BB	520	520
35-37	CC	608	608
40-42
45-47	Motor Code	Max Motor Amps
50-52
55-57	P	265
	Q	283
Economizer Option	R	306
	S	334
E – With Economizer	T	368
N – No Economizer	U	421	a23-1533
	V	440

R – Compressor

*First number denotes frame size.

†Maximum limits only. Additional application limits apply that may reduce these ampacities.

Fig. 2 — Model Number Identification

Identifying the Drive by Part Number — Each LiquiFlo™

2.0AC drive can be identified by its part number. See Fig. 5. This number appears on the shipping label and on the VFD nameplate.

Drive Input Component Location — Figure 6 identifies the control center components.

Identifying the Power Module by I.D. Number — Each Liqui- Flo 2.0 AC power module can be identified by its I.D. number. See Fig. 5. This number appears on the shipping label and on the power module’s nameplate. Power ratings are provided in Table 1.

INSTALLATION REQUIREMENTS — Certain requirements should be checked before continuing with the chiller’s electri- cal installation. Input power wire sizes, branch circuit protec- tion, and control wiring are all areas that need to be evaluated.

Determining Wire Size Requirements — Wire size should be determined based on the size of the conduit openings, and applicable local, national, and international codes (e.g., NEC [National Electric Code]/CEC [California Energy Commis- sion] regulations). General recommendations are included in the Carrier field wiring drawing.

Conduit Entry Size — It is important to determine the size of the conduit openings in the enclosure power entry plate so that the wire planned for a specific entry point will fit through the opening. Do NOT punch holes or drill into the top surface of the control center enclosure for field wiring. Do not punch holes or drill into the top surface of the control center enclosure for field wiring. Knockouts are provided in the back of the control center for field control wiring connections.

Recommended Control and Signal Wire Sizes — The rec- ommended minimum size wire to connect I/O signals to the control terminal blocks is 18 AWG (American Wire Gage). Recommended terminal tightening torque is 7 to 9 in.-lb (0.79 to 1.02 N-m).

Recommended Air Flow Clearances — Be sure there is ade- quate clearance for air circulation around the enclosure. A 6-in. (152.4 mm) minimum clearance is required wherever vents are located in the VFD enclosure.

Match Power Module Input and Supply Power Ratings — It is important to verify that building power will meet the input power requirements of the Machine Electrical Data nameplate

input power rating. Be sure the input power to the chiller corresponds to the chiller’s nameplate voltage, current, and fre- quency. Refer to machine nameplate in Fig. 7. The machine electrical data nameplate is located on the right side of the control center.

PROVIDE MACHINE PROTECTION — Protect machine and VFD enclosure from construction dirt and moisture. Keep protective shipping covers in place until machine is ready for installation.

If machine is exposed to freezing temperatures after water circuits have been installed, open waterbox drains and remove all water from cooler and condenser. Leave drains open until system is filled.

It is important to properly plan before installing a 23XRV unit to ensure that the environment and operating conditions are satisfactory. The installation must comply with all require- ments in the certified prints.

Rigging the Machine — The 23XRV machine can be rigged as an entire assembly. Large interconnecting piping has flanged connections that allow the compressor, cooler, and condenser sections to be separated and rigged individually. In addition, the VFD can be removed and rigged separately.

RIG MACHINE ASSEMBLY — See rigging instructions on label attached to machine. Also refer to rigging guide (Fig. 8), physical data in Fig. 9, and Tables 2-9B. Lift machine only from the points indicated in rigging guide. Each lifting cable or chain must be capable of supporting the entire weight of the machine.

Lifting machine from points other than those specified may result in serious damage to the unit and personal injury. Rigging equipment and procedures must be adequate for machine weight. See Fig. 8 for machine weights.

NOTE: These weights are broken down into component sections for use when installing the unit in sections. For the complete machine weight, add all component sections and refrigerant charge together. See Tables 5-9B for machine component weights.

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