Carrier Water Dispenser 23XRV User Manual
EVERGREEN®  
Product  
Data  
23XRV  
High-Efficiency Variable Speed Screw Chiller  
with FOXFIRE™ Compression Technology  
50/60 Hz  
HFC-134a  
300 to 550 Nominal Tons (1055 to 1934 Nominal kW)  
®
Carrier’s Evergreen® 23XRV chiller is  
the world’s first integrated variable  
speed, water-cooled, screw chiller.  
It incorporates significant break-  
throughs in water-cooled chiller tech-  
nology to provide excellent reliability  
and achieve superior efficiencies at  
true operating conditions without com-  
promising the environment.  
The 23XRV chiller provides:  
• Variable speed, positive  
displacement screw compressor.  
• Air Conditioning, Heating, and  
Refrigerant Institute (AHRI) certified  
efficiencies to 0.33 kW/ton (AHRI  
IPLV).  
• Chlorine-free HFC-134a refrigerant.  
• IEEE-519 compliance for harmonic  
distortion.  
• An ideal solution for constant and  
variable flow pumping systems.  
Features/Benefits  
Quality design and con-  
struction make the Evergreen  
23XRV chillers the best  
choice for modern, efficient  
chilled water plants.  
Product reliability  
The 23XRV chiller uses proven tech-  
nology from Carrier’s existing line of  
23XRV  
Evergreen chillers along with innova-  
tions that increase reliability. The  
23XRV compressors are designed for  
extremely high reliability. The ad-  
vanced tri-rotor compressor features a  
balanced rotor geometry and shorter  
SEISMICOMPLIANT*  
* Meets IBC 2006, ASCE-7-05, CBC 2007, and OSHPD seismic requirements.  
screw lengths, resulting in vastly re-  
duced compressor bearing loads and a  
minimum L10 compressor bearing life  
in excess of 500,000 hours when op-  
erated at AHRI conditions.  
2008 AHR EXPO®  
INNOVAATION  
AWARD  
WINNER – Green Building  
Copyright 2010 Carrier Corporation  
Form 23XRV-3PD  
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• Machine room cooling requirements input power leads to the VFD provides refrigerant more evenly over the  
associated with air-cooled motors, all unit power.  
which dissipate heat to the mechan-  
length of the vessel for improved  
efficiency.  
Closely spaced intermediate sup-  
port sheets — Support sheets pre-  
Marine container shipment — The  
ical room.  
compact design allows for open-top  
container shipment to export destina-  
tions, ensuring quality while reducing  
shipping cost.  
• High noise levels common with air-  
cooled motors, which radiate noise  
to the machine room and adjacent  
areas.  
Heat exchanger combinations —  
The Evergreen 23XRV chillers are  
available with a complete line of heat  
exchangers, ensuring the best combi-  
nation of chiller components to meet  
project specific tonnage and efficiency  
requirements. One, 2 and 3-pass  
arrangements are available to meet a  
wide variety of flow conditions. Nozzle-  
in-head and marine waterboxes are  
available to meet 150 psig and  
• Shaft alignment problems that occur  
with open-drive designs during start-  
up and operation, when equipment  
temperature variations cause ther-  
mal expansion.  
Positive pressure design — Posi-  
tive pressure designs eliminate the  
need for costly low pressure contain-  
ment devices, reducing the initial cost  
of the system. The Evergreen® 23XRV  
chiller’s positive pressure design en-  
sures that air, moisture and other per-  
formance degrading contaminants are  
not sucked inside the chiller. Purge  
units and their associated mainte-  
nance are no longer necessary.  
Optional refrigerant isolation  
valves — The optional refrigerant  
isolation valves allow the refrigerant  
to be stored inside the chiller during  
shipment from the factory, minimizing  
start-up time. During servicing, the  
“in-chiller” storage reduces refrigerant  
loss and eliminates time-consuming  
transfer procedures. As a self-contained  
unit, the Evergreen 23XRV chiller does  
not require additional remote storage  
systems.  
Optional pumpdown unit — Com-  
bined with the refrigerant isolation  
valves listed above, the optional pump-  
down unit eliminates complex connec-  
tions to portable transfer systems,  
thereby reducing service costs. The op-  
tional pumpdown compressor meets  
Environmental Protection Agency’s  
(EPA) vacuum level requirements that  
mandate minimizing refrigerant emis-  
sions during service.  
300 psig piping requirements.  
Heat exchanger features  
ASME certified construction — An  
independent agency certifies the  
design, manufacture, and testing of  
all heat exchangers to American  
Society of Mechanical Engineers  
(ASME) standards, ensuring heat ex-  
changer safety, reliability and long life.  
The ASME U-stamp is applied to the  
refrigerant side of the evaporator and  
condenser and is applied to the water  
side of heat exchangers when 300 psig  
marine water boxes are provided.  
High performance tubing — Carrier’s  
Evergreen chillers utilize advances in heat  
transfer technology, providing compact,  
high-efficiency heat exchangers. Tubing  
with advanced internally and externally  
enhanced geometry improves chiller per-  
formance by reducing overall resistance  
to heat transfer while reducing fouling.  
Cooler tube expansion — Cooler  
tube expansion at center support  
sheets prevents unwanted tube move-  
ment and vibration, thereby reducing  
the possibility of premature tube fail-  
ure. Tube wall thickness is greater at  
the expansion location, support sheets,  
and end tube sheets in order to provide  
maximum strength and long tube life.  
Double-grooved end tube sheet  
holes — This design provides a more  
robust seal than single rolled joints, re-  
ducing the possibility of leaks between  
the water and refrigerant sides of the  
chiller.  
Modular construction — The cool-  
er, condenser, and compressor assem-  
blies are bolted together, making Ever-  
green 23XRV chillers ideally suited for  
replacement jobs where ease of disas-  
sembly and reassembly at the jobsite  
are essential.  
Single point power — The 23XRV  
chiller features internal control power  
transformers to provide low voltage  
power (115 v and 24 vdc) for machine  
controls. Simply connecting the three  
Condenser baffle — The baffle de-  
flects hot discharge gas before it con-  
tacts condenser tubes, reducing tube  
vibration and wear while distributing  
3
Features/Benefits (cont)  
feature also allows the machine to  
operate at reduced capacity, rather  
Ramp loading — Ramp loading en-  
sures smooth pulldown of liquid loop  
can be prevented through password  
protection. Built-in diagnostic capabili-  
ties assist in troubleshooting and rec-  
ommend proper corrective action for  
preset alarms, resulting in greater  
working time.  
than shut down, when key safety limits temperature and prevents a rapid  
are approached.  
increase in compressor power con-  
sumption during the pulldown period.  
Chilled liquid reset — Reset can be  
accomplished manually or automatical- Automated controls test — The  
ly from the building management sys-  
tem. For a given capacity, reset allows  
operation at slower compressor  
speeds, saving energy when warmer  
chilled liquid can be used.  
Demand limiting — This feature lim- a yearly schedule for each week, week- last 25 alert messages in memory. This  
its the power draw of the chiller during ends, and holidays.  
peak loading conditions. When incor-  
porated into the Carrier Comfort  
Network® building automation system,  
a red line command holds chillers at  
their present capacity and prevents any  
other chillers from starting. If a load  
shed signal is received, the compres-  
sors are unloaded to avoid demand  
charges whenever possible.  
test can be executed prior to start-up  
to verify that the entire control system  
is functioning properly.  
365-day real time clock — This  
feature allows the operator to program Alert file — This file maintains the  
Alarm file — This file maintains the  
last 25 time-and date-stamped alarm  
messages in memory. This function re-  
duces troubleshooting time and cost.  
function provides prognostic informa-  
tion and corrective actions that can  
avoid unit shutdown.  
Configuration data backup —  
Non-volatile memory provides  
protection during power failures and  
eliminates time consuming control  
reconfiguration.  
Occupancy schedules — Schedules  
can be programmed into the controller  
to ensure that the chiller operates  
when cooling is required and remains  
off when not needed by the tenants or  
process.  
Extensive service menu — Unau-  
thorized access to the service menu  
Model number nomenclature  
S–Special  
Not Used  
23XRV – High Efficiency  
Variable Speed Screw Chiller  
Voltage Code  
3 –380-3-60  
4 –416-3-60  
5 –460-3-60  
9 –380/415-3-50  
Cooler Size*  
30-32  
35-37  
40-42  
45-47  
50-52  
55-57  
Drive  
Code  
AA  
Amps  
In†  
440  
520  
520  
608  
Amps  
Out†  
442  
Condenser Size*  
30-32  
35-37  
BA  
442  
BB  
CC  
520  
608  
40-42  
45-47  
50-52  
55-57  
Motor Code  
P
Q
R
S
T
U
V
a23-1648  
Economizer Option  
E – With Economizer  
N – No Economizer  
*First number denotes frame size.  
†Maximum limits only. Additional application  
limits apply that may reduce these ampacities.  
R – Compressor  
Quality Assurance  
Certified to ISO 9001:2000  
AHRI (Air Conditioning, Heating  
and Refrigeration Institute)  
Performance Certified  
ASME  
‘U’ Stamp  
SEISMICOMPLIANT*  
* Meets IBC 2006, ASCE-7-05, CBC 2007, and OSHPD seismic requirements.  
4
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Physical data  
23XRV COMPRESSOR AND MOTOR WEIGHTS  
ENGLISH  
Motor  
SI  
Total  
Motor  
Terminal  
Cover  
(kg)  
MOTOR  
Stator  
Weight  
(lb)  
Rotor  
Weight  
(lb)  
Compressor  
Weight  
Stator  
Weight  
(kg)  
Rotor  
Weight  
(kg)  
Compressor  
SIZE  
Terminal  
Cover  
(lb)  
Weight  
(lb)  
(kg)  
P,Q,R,S,  
T,U,V  
4866  
441  
229  
46  
2207  
200  
104  
21  
COMPONENT WEIGHTS  
FRAME 3 HEAT  
EXCHANGER  
FRAME 4 HEAT  
EXCHANGER  
FRAME 5 HEAT  
EXCHANGER  
COMPONENT  
lb  
70  
179  
747  
1650  
700  
542  
kg  
32  
81  
339  
749  
318  
246  
lb kg  
lb  
115  
232  
747  
1650  
700  
kg  
52  
Isolation Valves  
Suction Elbow  
Discharge Elbow/Muffler  
Control Center/VFD  
Vaporizer and Oil Sump  
Economizer  
70  
237  
32  
108  
339  
749  
318  
246  
105  
339  
749  
318  
246  
747  
1650  
700  
542  
542  
LEGEND  
VFD  
—
Variable Frequency Drive  
23XRV HEAT EXCHANGER WEIGHTS  
ENGLISH  
METRIC (SI)  
Machine Charge  
Dry Rigging  
Dry Rigging  
NUMBER  
OF TUBES  
Weight  
Machine Charge  
Weight  
(lb)*  
(kg)*  
CODE  
Refrigerant  
Weight (lb)  
With Without  
Economizer Economizer  
Liquid Weight  
(lb)  
Refrigerant  
Weight (kg)  
With Without  
Economizer Economizer  
Liquid Weight  
(kg)  
Cooler Cond.  
Cooler Cond.  
Only  
Only  
Only  
Only  
Cooler Cond.  
Cooler Cond.  
Cooler Cond.  
30  
31  
32  
35  
36  
37  
40  
41  
42  
45  
46  
47  
50  
51  
52  
55  
56  
57  
200  
240  
282  
200  
240  
282  
324  
364  
400  
324  
364  
400  
431  
485  
519  
431  
485  
519  
218  
266  
315  
218  
266  
315  
366  
415  
464  
366  
415  
464  
507  
556  
602  
507  
556  
602  
4148  
4330  
4522  
4419  
4627  
4845  
5008  
5178  
5326  
5463  
5659  
5830  
5827  
6053  
6196  
6370  
6631  
6795  
3617  
3818  
4023  
4529  
4758  
4992  
4962  
5155  
5347  
5525  
5747  
5967  
6013  
6206  
6387  
6708  
6930  
7138  
800  
800  
800  
910  
910  
910  
900  
900  
900  
1015  
1015  
1015  
1250  
1250  
1250  
1430  
1430  
1430  
650  
650  
650  
760  
760  
760  
825  
825  
825  
960  
960  
960  
1100  
1100  
1100  
1280  
1280  
1280  
464  
531  
601  
511  
587  
667  
863  
930  
990  
464  
542  
621  
513  
602  
692  
915  
995  
1074  
998  
1088  
1179  
1225  
1304  
1379  
1339  
1429  
1514  
1877  
1959  
2046  
2000  
2094  
2193  
2675  
2758  
2832  
2882  
2976  
3061  
3182  
3294  
3364  
3429  
3556  
3636  
1676  
1769  
1860  
2089  
2195  
2299  
2746  
2839  
2932  
3001  
3108  
3214  
3304  
3397  
3485  
3620  
3726  
3826  
363  
363  
363  
413  
413  
413  
408  
408  
408  
460  
460  
460  
567  
567  
567  
649  
649  
649  
295  
295  
295  
345  
345  
345  
375  
375  
375  
436  
436  
436  
499  
499  
499  
581  
581  
581  
210  
241  
273  
232  
266  
303  
391  
422  
449  
425  
460  
491  
499  
541  
566  
545  
591  
621  
210  
246  
282  
233  
274  
314  
415  
451  
487  
453  
494  
535  
556  
591  
626  
607  
648  
687  
938  
1014  
1083  
1101  
1192  
1248  
1201  
1304  
1369  
COND — Condenser  
*Rigging weights are for standard tubes of standard wall thickness (EDE and  
Spikefin 3, 0.025-in. [0.635 mm] wall).  
NOTES:  
1. Cooler includes the suction elbow and 1/2 the distribution piping weight.  
2. Condenser includes float valve and sump, discharge elbow, and 1/2 the  
distribution piping weight.  
3. For special tubes, refer to the 23XRV Computer Selection Program.  
4. All weights for standard 2-pass NIH (nozzle-in-head) design with vic-  
taulic grooves.  
5
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ADDITIONAL WEIGHTS FOR 23XRV MARINE WATERBOXES*  
150 psig (1034 kPa) MARINE WATERBOXES  
ENGLISH (lb)  
SI (kg)  
NUMBER  
OF  
PASSES  
FRAME  
Cooler  
Condenser  
Cooler  
Condenser  
Rigging Wgt Liquid Wgt Rigging Wgt Liquid Wgt Rigging Wgt Liquid Wgt Rigging Wgt Liquid Wgt  
1 and 3  
730  
365  
1888  
944  
2445  
1223  
700  
350  
908  
452  
1019  
510  
N/A  
365  
N/A  
989  
N/A  
1195  
N/A  
350  
N/A  
452  
N/A  
499  
331  
166  
856  
428  
1109  
555  
318  
159  
412  
205  
462  
231  
N/A  
166  
N/A  
449  
N/A  
542  
N/A  
159  
N/A  
205  
N/A  
226  
3
4
5
2
1 and 3  
2
1 and 3  
2
300 psig (2068 kPa) MARINE WATERBOXES  
ENGLISH (lb)  
SI (kg)  
NUMBER  
OF  
PASSES  
FRAME  
Cooler  
Condenser  
Cooler  
Condenser  
Rigging Wgt Liquid Wgt Rigging Wgt Liquid Wgt Rigging Wgt Liquid Wgt Rigging Wgt Liquid Wgt  
1 and 3  
860  
430  
2162  
1552  
2655  
1965  
700  
350  
908  
393  
1019  
439  
N/A  
430  
N/A  
1641  
N/A  
1909  
N/A  
350  
N/A  
393  
N/A  
418  
390  
195  
981  
704  
1204  
891  
318  
159  
412  
178  
462  
199  
N/A  
195  
N/A  
744  
N/A  
866  
N/A  
159  
N/A  
178  
N/A  
190  
3
4
5
2
1 and 3  
2
1 and 3  
2
*Add to cooler and condenser weights for total weights. Cooler and condenser weights may be found in the 23XRV Heat Exchanger  
Weights table on page 5. The first digit of the heat exchanger code (first column) is the heat exchanger frame size.  
23XRV WATERBOX COVER WEIGHTS — ENGLISH (lb)  
FRAMES 3, 4, AND 5  
COOLER  
Frame 4  
CONDENSER  
Frame 4  
WATERBOX  
DESCRIPTION  
Frame 3  
Frame 5  
Frame 3  
Frame 5  
Victaulic  
Victaulic  
Victaulic  
Victaulic  
Victaulic  
Victaulic  
Flanged  
Flanged  
Flanged  
Flanged  
Flanged  
Flanged  
Nozzles  
Nozzles  
Nozzles  
Nozzles  
Nozzles  
Nozzles  
NIH,1 pass Cover 150 psig  
NIH,2 pass Cover 150 psig  
NIH,3 pass Cover 150 psig  
NIH Plain End, 150 psig  
282  
287  
294  
243  
318  
340  
310  
243  
148  
202  
472  
138  
185  
256  
488  
138  
168  
222  
617  
154  
229  
275  
634  
154  
282  
287  
294  
225  
318  
340  
310  
225  
148  
191  
503  
138  
185  
245  
519  
138  
168  
224  
628  
154  
229  
298  
655  
154  
MWB End Cover, 150 psig* 243/315 243/315 138/314 138/314 154/390 154/390 225/234 225/234 138/314 138/314 154/390 154/390  
NIH,1 pass Cover 300 psig  
NIH,2 pass Cover 300 psig  
NIH,3 pass Cover 300 psig  
NIH Plain End, 300 psig  
411  
411  
433  
294  
486  
518  
468  
294  
633  
626  
660  
522  
709  
733  
694  
522  
764  
760  
795  
658  
840  
867  
830  
658  
411  
411  
433  
270  
486  
518  
468  
270  
633  
622  
655  
522  
709  
729  
689  
522  
764  
727  
785  
658  
840  
878  
838  
658  
MWB End Cover, 300 psig* 445/619 445/619 522/522 522/522 658/658 658/658 359/474 359/474 658/658 658/658 658/658 658/658  
LEGEND  
*Nozzle end weight/return end weight.  
NIH  
—
Nozzle-in-Head  
NOTE: Weight for NIH 2-pass cover, 150 psig (1034 kPa), is included in  
the heat exchanger weights shown on page 5.  
MWB — Marine Waterbox  
23XRV WATERBOX COVER WEIGHTS — SI (kg)  
FRAMES 3, 4, AND 5  
COOLER  
Frame 4  
CONDENSER  
Frame 4  
WATERBOX  
DESCRIPTION  
Frame 3  
Frame 5  
Frame 3  
Frame 5  
Victaulic  
Victaulic  
Nozzles  
Victaulic  
Nozzles  
Victaulic  
Nozzles  
Victaulic  
Nozzles  
Victaulic  
Flanged  
Flanged  
Flanged  
Flanged  
Flanged  
Flanged  
Nozzles  
Nozzles  
NIH,1 pass Cover 1034 kPa  
NIH,2 pass Cover 1034 kPa  
NIH,3 pass Cover 1034 kPa  
NIH Plain End, 1034 kPa  
128  
130  
133  
110  
144  
154  
141  
110  
67  
92  
214  
63  
84  
116  
221  
63  
76  
101  
280  
70  
104  
125  
288  
70  
128  
130  
133  
102  
144  
154  
141  
102  
67  
87  
228  
63  
84  
111  
235  
63  
76  
102  
285  
70  
104  
135  
297  
70  
MWB End Cover, 2068 kPa*  
LEGEND  
*Nozzle end weight/return end weight.  
NOTE: Weight for NIH 2-pass cover, 150 psig (1034 kPa), is included in  
the heat exchanger weights shown on page 5.  
6
Options and accessories  
ITEM  
.028 or .035 in. (0.711 or 0.889 mm) Internally/Externally Enhanced Copper Tubing — Cooler/Condenser  
.028 or .035 in. (0.711 or 0.889 mm) Internally/Externally Enhanced Cupronickel Tubing — Condenser  
.028 or .035 in. (0.711 or 0.889 mm) Smooth Bore/Externally Enhanced Copper Tubing — Cooler/Condenser  
.028 or .035 in. (0.711 or 0.889 mm) Smooth Bore/Externally Enhanced Cupronickel Tubing — Condenser  
Flanged Cooler and/or Condenser Waterbox Nozzles**  
Hinged Waterboxes  
Marine Waterboxes, 150 psig (1034 kPa)††  
Marine Waterboxes, 300 psig (2068 kPa)††  
Nozzle-in Head Waterbox, 300 psig (2068 kPa)  
One, 2, or 3 Pass Cooler or Condenser Waterside Construction  
Seismic Kit  
OPTION* ACCESSORY†  
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Zinc Anodes  
100K AIC (Amp Interrupt Capacity) High Interrupt Circuit Breaker with Shunt Trip  
Analog Voltmeter and Ammeter with 3 Phase Selector Switch  
BACnet*** Communications  
LonWorks††† Carrier Translator  
Sensor Package  
Refrigerant Isolation Valves  
Separate Storage Tank and Pumpout Unit  
Shipped Factory Charged with Refrigerant  
Stand-Alone Pumpout Unit  
Unit-Mounted Pumpout Unit  
Hot Gas Bypass  
Soleplate Package  
Spring Isolator Kit  
Acoustical Sound Insulation Kit  
Full Cold Surface Thermal Insulation (Except Waterbox Covers)  
Customer Factory Performance Testing  
Export Crating  
Extended Warranty (North American Operations [NAO] only)  
Service Contract  
*Factory-installed.  
††Optional marine waterboxes available for 23XRV heat exchanger  
frames 3-5 only. Standard waterboxes for 23XRV are nozzle-in-head  
type, 150 psig (1034 kPa).  
†Field-installed.  
**Standard waterbox nozzles are victaulic type. Flanged nozzles are  
available as an option with either nozzle-in-head type waterboxes or  
marine waterboxes.  
***Sponsored by ASHRAE (American Society of Heating, Refrigerating,  
and Air Conditioning Engineers).  
†††Registered trademark of Echelon Corporation.  
910  
7
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Dimensions  
23XRV DIMENSIONS  
TUBE REMOVAL  
SPACE FOR  
MOTOR SERVICE  
CLEARANCE  
EITHER END  
SIZES 30-32, 40-42  
50-52  
1’-10” (559 mm)  
FRAME R COMPRESSOR 3’-0” (915mm)  
14’-3” (4343 mm)  
SIZES 35-37, 45-47  
55-57  
RECOMMENDED OVERHEAD SERVICE CLEARANCE  
14’-0” (4267 mm)  
a23-1646  
C
2’ MIN  
(610 mm)  
B
(WIDEST POINT)  
A
4’ MIN  
(1219 mm)  
SERVICE AREA  
4’-10” MIN  
(1475 mm)  
23XRV DIMENSIONS (NOZZLE-IN-HEAD WATERBOX)  
A (Length, with Nozzle-in-Head Waterbox)  
B (Width)  
C (Height)  
HEAT EXCHANGER  
SIZE  
1 Pass  
ft-in.  
14- 31/4  
15-113/4  
14- 9  
2-Pass*  
3 Pass  
mm  
4350  
4870  
4496  
5017  
4521  
5042  
ft-in.  
mm  
4172  
4693  
4347  
4867  
4382  
4902  
ft-in.  
mm  
4350  
4870  
4420  
4940  
4432  
4953  
ft-in.  
6- 4  
mm  
1930  
ft-in.  
mm  
30 to 32  
35 to 37  
40 to 42  
45 to 47  
50 to 52  
55 to 57  
13- 81/4  
15- 43/4  
14- 31/8  
15-115/8  
14- 41/2  
16- 1  
14- 31/4  
15-113/4  
14- 6  
16- 21/2  
14- 61/2  
16- 3  
7- 25/8  
7- 25/8  
7- 61/2  
7- 61/2  
7- 63/4  
7- 63/4  
2200  
2200  
2299  
2299  
2305  
2305  
6- 4  
1930  
2045  
2045  
2127  
2127  
6- 81/2  
6- 81/2  
6-113/4  
6-113/4  
16- 51/2  
14-10  
16- 61/2  
23XRV DIMENSIONS (MARINE WATERBOX)  
A (Length, Marine Waterbox)  
B (Width)  
HEAT EXCHANGER  
SIZE  
2-Pass*  
1 or 3 Pass†  
ft-in.  
C (Height)  
ft-in.  
14- 9  
mm  
4496  
5017  
4642  
5163  
4661  
5182  
mm  
4997  
5518  
5086  
5607  
5093  
5613  
ft-in.  
mm  
30 to 32  
35 to 37  
40 to 42  
45 to 47  
50 to 52  
55 to 57  
16- 43/4  
18- 11/4  
16- 31/4  
18- 43/4  
16- 81/2  
18- 5  
6- 93/8  
6- 93/8  
6- 93/4  
6- 93/4  
7- 1  
2067  
2067  
2076  
2076  
2159  
2159  
16- 51/2  
15- 23/4  
16-113/4  
15- 31/2  
17- 0  
See unit  
certified  
drawings  
7- 1  
*Assumes both cooler and condenser nozzles on same end of chiller.  
†1 or 3 pass length applies if cooler is a 1 or 3 pass design.  
NOTES:  
1. Service access should be provided per American Society of Heat-  
ing, Refrigerating, and Air Conditioning Engineers (ASHRAE) 15,  
latest edition, National Fire Protection Association (NFPA) 70, and  
local safety code.  
2. Allow at least 3 ft (915 mm) overhead clearance for service rigging  
for the compressor.  
3. Certified drawings available upon request.  
4. Marine waterboxes may add 6 in. (152 mm), to the width of the  
machine. See certified drawings for details.  
5. ‘A’ length and ‘B’ width dimensions shown are for standard  
150 psig (1034 kPa) design and victaulic connections. The  
300 psig (2068 kPa) design and/or flanges will add length. See cer-  
tified drawings.  
6. Dished head waterbox covers not available for the 3-pass design.  
8
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NOZZLE SIZE  
NOZZLE SIZE (in.)  
(Nominal Pipe Size)  
FRAME  
SIZE  
23XRV HEAT EXCHANGER MIN/MAX FLOW RATES*  
ENGLISH (GPM)  
*Flow rates based on standard tubes in the cooler and condenser. Minimum flow based on tube velocity of 3 ft/sec (0.91 m/sec);  
maximum flow based on tube velocity of 12 ft/sec (3.66 m/sec). Consult the factory if variable primary flow.  
SI (L/s)  
*Flow rates based on standard tubes in the cooler and condenser. Minimum flow based on tube velocity of 3 ft/sec (0.91 m/sec);  
maximum flow based on tube velocity of 12 ft/sec (3.66 m/sec). Consult the factory if variable primary flow.  
9
Electrical data  
VFD FRAME SIZES  
FRAME SIZE  
MAX INPUT CURRENT*  
MAX OUTPUT CURRENT*  
AA  
BA  
BB  
CC  
440  
520  
520  
608  
442  
442  
520  
608  
*Maximum limits only. Additional application limits apply that will reduce these ampacities.  
AUXILIARY RATINGS*  
MAXIMUM  
PROTECTIVE DEVICE  
SIZE (AMPS)  
ITEM  
VOLTAGE  
WATTS  
Controls, Oil Pump And Heater Circuit†  
Oil Pump  
115  
115  
115  
15  
1.48  
4.35  
—
130  
500  
Oil Sump Heater  
Oil Vaporizer Heater Circuit†  
Oil Vaporizer Heater  
115  
115  
15  
13  
—
1500  
*Factory wired to VFD.  
†Minimum circuit ampacity of 15 amps.  
10  
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Controls  
• High VFD inverter temperature*†  
• DC bus voltage (Low/High)  
Capacity control  
• Leaving chilled liquid control  
• Entering chilled liquid control  
• Soft loading control by temperature or load ramping  
• Hot gas bypass valve (optional)  
• Power (demand) limiter  
• Automatic chilled liquid reset (3 methods)  
• Manual speed control  
Microprocessor controls  
Microprocessor controls provide the safety, interlock, ca-  
pacity control, indications and accessibility necessary to  
operate the chiller in a safe and efficient manner.  
Control system  
The microprocessor control on each Carrier chiller is  
factory-mounted, factory-wired, and factory-tested to  
ensure machine protection and efficient capacity control.  
In addition, the program logic ensures proper starting,  
stopping, and recycling of the chiller and provides a com-  
munication link to the Carrier Comfort Network® (CCN)  
system.  
Interlocks  
• Manual/automatic remote start  
• Starting/stopping sequence  
Pre-lube/post-lube  
Pre-flow/post-flow  
• Compressor run interlock  
• Pre-start check of safeties and alerts  
• Low chilled liquid (load) recycle  
• Monitor/number compressor starts and run hours  
• Manual reset of safeties  
Indications  
• Chiller operating status message  
• Power-on  
Features  
Control system  
• Component test and diagnostic check  
• Programmable recycle allows chiller to recycle at opti-  
mum loads for decreased operating costs  
• Menu-driven keypad interface for status display, set  
point control, and system configuration  
• CCN system compatible  
• Primary and secondary status messages  
• Individual start/stop schedules for local and CCN opera-  
tion modes  
• Recall of up to 25 alarm messages and 25 alert mes-  
sages with diagnostic help  
• Two chiller lead/lag with third chiller standby is stan-  
dard in the PIC III software  
• Optional soft stop unloading decreases compressor  
speed to unload the motor to the configured amperage  
level prior to stopping  
• Languages pre-programmed at factory for English, Chi-  
nese, Japanese, Korean  
• ILT (International Language Translator) available for  
conversion of extended ASCII characters  
Safety cutouts  
• Pre-start diagnostic check  
• Compressor motor amps  
• Alert (pre-alarm)††  
• Alarm  
• Contact for remote alarm  
• Safety shutdown messages  
• Elapsed time (hours of operation)  
• Chiller input kW  
• Demand kW  
Drive control parameters  
• Compressor 100% speed (Hz)  
• Rated line voltage  
• Rated line amps  
• Rated line kW  
• Motor rated Load kW  
• Motor rated Load amps  
• Motor nameplate amps  
• Motor nameplate RPM  
• Motor nameplate kW  
• Inverter PWM frequency  
• Motor high temperature*†  
• Refrigerant (condenser) high pressure*†  
• Refrigerant (cooler) low temperature*†  
• Lube oil low pressure*  
• Compressor (refrigerant) high discharge temperature*  
• Under voltage**  
• Over voltage**  
• Cooler and condenser liquid flow  
• Motor overload†  
• Motor acceleration time  
• Intermittent power loss**  
• Motor stall protection  
*Can be configured by the user to provide alert indication  
at user-defined limit.  
†Override protection: Causes compressor to first unload  
and then, if necessary, shut down.  
**Will not require manual reset or cause an alarm if auto-  
restart after power failure is enabled.  
††By display code only.  
• Low level ground fault  
• Cooler and condenser freeze prevention*  
• Low oil temperature  
• Line voltage imbalance**  
• Line current imbalance**  
• Line frequency  
• Motor current imbalance  
• Motor rotation reversal  
• Excessive motor amps  
• Motor starts limit  
• VFD speed out of range  
• High VFD rectifier temperature*†  
11  
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Controls (cont)  
CONTROL PANEL DISPLAY (Front View)  
ICVC ENGLISH DISPLAY IN SI UNITS  
CONTROL PANEL DISPLAY (Front View)  
ICVC CHINESE DISPLAY IN METRIC UNITS  
12  
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a23-1649  
13  
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Controls (cont)  
Control sequence  
CONTROL SEQUENCE  
To start — Local start-up (manual start-up) is initiated by  
pressing the LOCAL or CCN menu softkey, which is indi-  
cated on the default international chiller visual control  
(ICVC) screen. Time schedule 01 or 03, respectively, must  
be in the Occupied mode and the internal 15-minute start-  
to-start and the 1-minute stop-to-start inhibit timers must  
have expired. All pre-start safeties are checked to verify  
that all prestart alerts and safeties are within limits (if one is  
not, an indication of the fault displays and the start will be  
delayed or is aborted). The signal is sent to start the cooler  
liquid pump. Five seconds later, the condenser liquid pump  
is energized. If satisfied, it checks the chilled liquid temper-  
ature against the control point. If the temperature is less  
than or equal to the chilled liquid control point, the con-  
denser liquid pump is deenergized and the chiller goes into  
a recycle mode.  
0
0
MACHINE SAFETIES,  
EVAPORATOR PUMP  
CONDENSER WATER  
PUMP  
WATER FLOWS  
CHILLED WATER  
TEMP,TOWER FAN  
CONTROL  
OILPUMP  
OILPRESSURE  
VERIFIED  
If the chilled liquid temperature is high enough, the start-  
up sequence continues. The oil pump is started and waits a  
minimum of 45 sec to verify oil flow. Once oil flow is veri-  
fied, the VFD is energized. The control will monitor for a  
phase reversal condition. At this time, the following occurs:  
VDF FAULT TEST  
COMPRESSOR, PHASE  
REVERSAL,  
COMPRESSOR AND  
SERVICE ONTIME  
COMPRESSOR  
RUNNING  
RAMP VDF TO  
TARGET SPEED  
• The “start-to-stop” timer is activated.  
• The “compressor on-time” and “service on-time” timers  
are activated.  
15-MINUTE  
START-TO-START  
TIMER  
• The “starts in 12-hour counter” advances by one.  
1-MINUTE  
• The “total compressor starts counter” advances by one.  
STOP-TO-START  
TIMER (SOFTWARE  
VERSION 13)  
Once started — If the VFD average current >5% within  
15 seconds after VFD start, the machine enters run mode  
and speed will be ramped up to meet VFD target speed.  
Once the target speed is met the controls, enter the capac-  
ity control mode.  
Shutdown sequence — The chiller shutdown is initiated  
if any of the following occur:  
D
E
G
A
C
TIME  
F
H
O/A  
B
I
J
L
K
0
— Phase reversal monitored  
A
—
START INITIATED: Pre-start checks are made; evaporator pump  
started  
B
— Condenser liquid pump started (5 seconds after A); tower fan control  
enabled  
• The Stop button is pressed for at least one second (the  
alarm light blinks once to confirm the stop command).  
• A recycle shutdown is initiated.  
C
D
— Liquid flows verified (30 sec to 5 minutes maximum after B)  
— Chilled liquid temperature checked against control point; oil pump  
on.  
— Oil pressure verified (oil pressure verified 45-300 sec after D).  
— VFD starts; phase reversal conditions monitored; compressor  
ontime and service ontime start; 15-minute inhibit timer starts (VFD  
fault tests for 15 sec after F)  
— Verify average current >5% within 15 sec after VFD start, ramp to  
VFD target speed.  
— Compressor reaches target speed, chiller set to running status  
E
F
• The time schedule has gone into unoccupied mode.  
• The chiller protective limit has been reached and the  
chiller is in alarm.  
G
• The start/stop status is overridden to stop from the  
ICVC, CCN system, or building management system.  
H
I
J
—
Shutdown initiated: Target VFD speed to 0% (or J occurs)  
— Ramp down until percent line current < soft stop amps threshold  
(0-60 sec after I)  
Once the controls shutdown sequence is initiated, the  
compressor is stopped and the VFD target speed is set to 0.  
If optional soft stop unloading is activated when the Stop  
button is pressed or the remote contacts open, motor  
speed decreases to a configured amperage level, and the  
compressor is stopped. The display indicates “Shutdown in  
Progress” while the motor speed decreases. Compressor  
ontime and service ontime timers stop once the current in  
all phases is <5%, indicating a VFD Stop Complete. The oil  
pump and cooler liquid pump are then deenergized. The  
condenser liquid pump shuts down when the refrigerant  
temperature or entering condenser liquid temperature is be-  
low pre-established limits. The 3-minute start-to-stop timer  
starts.  
K
L
— Oil pump relay off (1-20 sec after J)  
— Evaporator pump deenergized (60 sec after K); condenser pump  
and tower fan control may continue to operate if condenser pressure  
is high; evaporator pump may continue if in RECYCLE mode  
O/A — Restart permitted (both inhibit timers expired) (minimum of 15 min-  
utes after F; minimum of 3 minutes after L)  
Restart — Restart is permitted after both inhibit timers  
have expired. If shutdown was due to a safety shutdown,  
the reset button must be depressed before restarting the  
chiller.  
14  
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Typical piping and wiring  
23XRV CHILLER  
MAIN COMPRESSOR  
MOTOR POWER  
1
1
1
1
8
7
6
TO CHILLED LIQUID PUMP  
TO CONDENSER LIQUID PUMP  
2
TO COOLING TOWER FAN  
9
TO  
COOLING  
TOWER  
9
3
3
FROM  
COOLING  
TOWER  
TO  
LOAD  
FROM  
LOAD  
DRAIN  
5
4
NOTES:  
LEGEND  
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. Refer to Carrier System Design Manual for details regarding piping techniques.  
4. Wiring not shown for optional devices such as:  
• remote start/stop  
1
2
3
4
5
6
7
8
9
—
—
—
—
—
—
—
—
—
Disconnect  
Unit-Mounted VFD/Control Center  
Pressure Gages  
Chilled Liquid Pump  
Condenser Liquid Pump  
Chilled Liquid Pump Starter  
Condenser Liquid Pump Starter  
Cooling Tower Fan Starter  
Vents  
• remote alarms  
• optional safety device  
• 4 to 20 mA resets  
Piping  
Control Wiring  
Power Wiring  
• optional remote sensors  
• kW output  
• head pressure reference  
5. Flow switches are NOT required.  
15  
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Control wiring schematic  
23XRV COMPONENT ARRANGEMENT  
LEGEND  
CCM — Chiller Control Module  
CCN — Carrier Comfort Network®  
ICVC — International Chiller Visual Controller  
GND — Ground  
16  
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Application data  
23XRV MACHINE FOOTPRINT  
A
D
C
C
L
VESSELS  
COND.  
C
L
ACCESSORY  
SOLEPLATE  
B
TYP.  
0’-3”  
F
[76.2mm]  
COOLER  
C
L
a23-1650  
E
X
X*  
G
0’-01/2”  
[13mm]  
TYP.  
Y*  
Y
*See detail on page 18.  
23XRV  
DIMENSIONS (ft-in.)  
DIMENSIONS (mm)  
HEAT EXCHANGER  
A
B
C
D
E
F
G
A
B
C
D
E
F
G
SIZE  
30-32  
35-37  
40-42  
45-47  
50-52  
55-57  
12-103/4  
14- 71/4  
12-103/4  
14- 71/4  
12-103/4  
14- 71/4  
5-41/4  
5-41/4  
6-0  
6-0  
6-51/2  
6-51/2  
0
0
0-35/8  
0-35/8  
0-35/8  
0-35/8  
0-35/8  
0-35/8  
1-13/4  
1-13/4  
1-13/4  
1-13/4  
1-13/4  
1-13/4  
0-9  
0-9  
0-9  
0-9  
0-9  
0-9  
0-1/2  
0-1/2  
0-1/2  
0-1/2  
0-1/2  
0-1/2  
3931  
4451  
3931  
4451  
3931  
4451  
1632  
1632  
0
0
92 349  
92 349  
229 13  
229 13  
229 13  
229 13  
229 13  
229 13  
0-11/2  
0-11/2  
0-  
0-  
1829 38 92 349  
1829 38 92 349  
1969 13 92 349  
1969 13 92 349  
1
/
/
2
1
2
910  
17  
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Application data (cont)  
23XRV ISOLATION WITH ACCESSORY SOLEPLATE PACKAGE  
TYPICAL ISOLATION  
STANDARD ISOLATION  
ELASTOMERIC PAD  
VIEW Y-Y  
ISOLATION WITH ISOLATION PACKAGE ONLY  
(STANDARD)  
NOTE: Isolation package includes 4 elastomeric pads.  
a23-1647  
ACCESSORY SOLEPLATE DETAIL  
VIEW X-X  
NOTES:  
1. Dimensions in ( ) are in millimeters.  
2. Accessory soleplate package includes 4 soleplates, 16 jacking screws and leveling  
pads. Requires isolation package.  
3. Jacking screws to be removed after grout has set.  
4. Thickness of grout will vary, depending on the amount necessary to level chiller. Use  
only pre-mixed non-shrinking grout, Ceilcote 748 or Chemrex Embeco 636 Plus  
Grout, 0-11/2(38.1) to 0-21/4(57) thick.  
5. Service clearance under the chiller is enhanced if leveling pads are not extended  
along the entire length of the heat exchangers.  
18  
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23XRV NOZZLE ARRANGEMENTS  
NOZZLE-IN-HEAD WATERBOXES  
DISCHARGE END  
SUCTION END  
FRAME 3  
12  
3
6
5
9
11  
10  
2
1
8
4
7
DISCHARGE END  
SUCTION END  
FRAMES 4 AND 5  
NOZZLE ARRANGEMENT CODES FOR ALL 23XRV NOZZLE-IN-HEAD WATERBOXES  
COOLER WATERBOXES CONDENSER WATERBOXES  
PASS  
PASS  
Arrangement  
Arrangement  
In  
Out  
In  
Out  
Code*  
Code*  
8
5
7
4
7
4
5
8
9
6
6
9
A
B
C
D
E
F
11  
2
10  
1
10  
1
2
11  
12  
3
3
12  
P
Q
R
S
T
1
2
3
1
2
3
U
*Refer to certified drawings.  
19  
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Application data (cont)  
23XRV NOZZLE ARRANGEMENTS (cont)  
MARINE WATERBOXES  
DISCHARGE END  
SUCTION END  
FRAME 3  
NOZZLE ARRANGEMENT CODES  
COOLER WATERBOXES  
CONDENSER WATERBOXES  
PASS  
PASS  
Arrangement  
Arrangement  
In  
Out  
In  
Out  
Code  
Code  
8
5
7
4
7
4
5
8
9
6
6
9
A
B
C
D
E
F
—
—
10  
1
—
—
12  
3
—
—
R
1
2
3
1
2
3
S
—
—
—
—
—
—
DISCHARGE END  
SUCTION END  
FRAMES 4, AND 5  
NOZZLE ARRANGEMENT CODES  
COOLER WATERBOXES  
CONDENSER WATERBOXES  
PASS  
PASS  
Arrangement  
Arrangement  
In  
Out  
In  
Out  
Code  
Code  
—
9
6
7
4
7
4
6
9
9
6
6
9
A
B
C
D
E
F
—
—
10  
1
—
—
12  
3
1
2
3
1
2
3
—
R
S
—
—
—
—
—
—
20  
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23XRV WATERBOX NOZZLE SIZES (Nozzle-In-Head and Marine Waterboxes  
NOMINAL PIPE SIZE (in.)  
ACTUAL PIPE ID (in.)  
Cooler Condenser  
FRAME  
SIZE  
PRESSURE  
psig (kPa)  
PASS  
Cooler  
Condenser  
1
2
3
1
2
3
1
2
3
10  
8
6
10  
8
6
10  
8
6
10  
8
6
10  
8
6
10  
10  
8
10.020  
7.981  
6.065  
10.020  
7.981  
6.065  
10.020  
7.981  
6.065  
10.020  
7.981  
6.065  
10.020  
7.981  
6.065  
10.020  
10.020  
7.981  
150/300  
3
4
5
(1034/2068)  
150/300  
(1034/2068)  
150/300  
(1034/2068)  
RELIEF VALVE LOCATIONS  
FRAME  
RELIEF VALVE  
LOCATION  
QUANTITY  
SIZE  
3-5  
OUTLET SIZE  
11/4-in. NPT FEMALE CONNECTOR  
11/4-in. NPT FEMALE CONNECTOR  
11/4-in. NPT FEMALE CONNECTOR  
MUFFLER  
COOLER  
CONDENSER  
1
1 or 2*  
2
3-5  
3-5  
OPTIONAL  
STORAGE TANK  
N/A  
1-in. NPT FEMALE CONNECTOR  
2
* Coolers without optional isolation require 2 relief valves.  
NOTE: All valves relieve at 185 psig (1275 kPa).  
RELIEF VALVE ARRANGEMENTS  
WITH OPTIONAL ISOLATION OF DISCHARGE AND COOLER  
WITH OPTIONAL ISOLATION  
WITHOUT OPTIONAL ISOLATION  
21  
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Application data (cont)  
Each heat exchanger and economizer (if equipped) is  
ASME ‘U’ stamped on the refrigerant side of each vessel.  
Vent and drain connections  
Nozzle-in-head waterboxes have vent and drain connec-  
tions on covers. Marine waterboxes have vent and drain  
connections on waterbox shells.  
Relief valve discharge pipe sizing  
See page 21 for number of relief valves.  
Relief valve discharge piping size should be calculated  
per the current version of the ASHRAE 15, latest edition,  
code using the tabulated C factors for each vessel shown in  
the table below.  
Provide high points of the chiller piping system with vents  
and the low points with drains. If shutoff valves are provid-  
ed in the main liquid pipes near the unit, a minimal amount  
of system liquid is lost when the heat exchangers are  
drained. This reduces the time required for drainage and  
saves on the cost of re-treating the system liquid.  
It is recommended that pressure gages be provided at  
points of entering and leaving liquid to measure pressure  
drop through the heat exchanger. Gages may be installed  
as shown in Pressure Gage Location table. Pressure gages  
installed at the vent and drain connections do not include  
nozzle pressure losses.  
23XRV RELIEF VALVE DISCHARGE PIPE SIZING  
RELIEF  
VESSEL  
VALVE  
RATED  
FIELD  
CONNECTION  
SIZE (FPT)  
HEAT  
EXCHANGER  
FRAME REQUIRED  
SIZE  
C FACTOR  
(lb air/Min)  
C FACTOR  
(lb air/Min)  
30 to 32  
35 to 37  
40 to 42  
45 to 47  
50 to 52  
55 to 57  
30 to 32  
35 to 37  
40 to 42  
45 to 47  
50 to 52  
55 to 57  
43.4  
49.5  
50.4  
57.4  
53.7  
61.1  
41.4  
47.1  
47.1  
53.7  
51.2  
58.3  
70.8  
70.8  
70.8  
70.8  
70.8  
70.8  
70.8  
70.8  
70.8  
70.8  
70.8  
70.8  
11/4  
11/4  
11/4  
11/4  
11/4  
11/4  
11/4  
11/4  
11/4  
11/4  
11/4  
11/4  
Use a reliable differential pressure gage to measure pres-  
sure differential when determining liquid flow. Regular gag-  
es of the required pressure range do not have the accuracy  
to provide accurate measurement of flow conditions.  
COOLER  
PRESSURE GAGE LOCATION  
NUMBER  
GAGE LOCATION  
OF  
(Cooler or Condenser)  
CONDENSER  
PASSES  
1 or 3  
2
One gage in each waterbox  
Two gages in waterbox with nozzles  
ASME stamping  
Carrier further recommends that an oxygen sensor be  
installed to protect personnel. Sensor should be able to  
sense the depletion or displacement of oxygen in the ma-  
chine room below 19.5% volume oxygen per ASHRAE  
15, latest edition.  
All 23XRV heat exchangers are constructed in accordance  
with ASHRAE (American Society of Heating, Refrigerat-  
ing, and Air Conditioning Engineers) 15 Safety Code for  
Mechanical Refrigeration (latest edition). This code, in  
turn, requires conformance with ASME (American Society  
of Mechanical Engineers) Code for Unfired Pressure Ves-  
sels wherever applicable.  
Design pressures  
Design and test pressures for heat exchangers are listed  
below.  
DESIGN AND TEST PRESSURES (23XRV)  
SHELL SIDE  
(Refrigerant)  
STANDARD TUBE SIDE  
(Liquid)  
OPTIONAL TUBE SIDE  
(Liquid)  
PRESSURES  
psig  
kPa  
psig  
kPa  
psig  
kPa  
Leak Test at Design Pressure*  
Hydrostatic  
Proof Test*  
185  
—
204  
1276  
—
1407  
150  
195  
—
1034  
1344  
—
300  
390  
—
2068  
2689  
—
*Nitrogen/Helium.  
HEAT EXCHANGER MATERIAL SPECIFICATIONS  
ITEM  
MATERIAL  
SPECIFICATION  
Shell  
HR Steel  
HR Steel  
HR Steel  
ASME SA516 GR 70  
ASME SA516 GR 70  
ASME SA516 GR 70, SA-36, or SA-285 GRC  
ASME SA675 GR 60, SA-516 GR70, or SA-181 CL70,  
SA-36, SA-675 GR70, SAE AME 7496  
Tube Sheet  
Condenser/Cooler Waterbox Cover  
Condenser/Cooler Waterbox Shell  
HR Steel  
Tubes  
Finned Copper  
ASME SB359  
Discharge/Suction  
Pipe  
Flanges  
Steel  
Steel  
ASME SA106 GRB  
ASME SA105  
LEGEND  
ASME — American Society of Mechanical Engineers  
HR  
—
Hot Rolled  
22  
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conforms with Underwriters Laboratories (UL) Standard  
94, Classification 94 HF-1. Both the 1/2-in. foam and the  
3/16-in. vinyl layer will pass flammability test method  
MVSS 302.  
Insulation  
23XRV MINIMUM FIELD-INSTALLED INSULATION  
REQUIREMENTS  
Field insulation — As indicated in the Condensation vs  
Relative Humidity table, the factory insulation provides  
excellent protection against condensation under most op-  
erating conditions. If temperatures in the equipment area  
exceed the maximum design conditions, extra insulation is  
recommended.  
If the machine is to be field insulated, obtain the approx-  
imate areas from the 23XRV Minimum Field-Installed Insu-  
lation Requirements table.  
Insulation of waterbox is made only in the field and this  
area is not included in 23XRV Minimum Field-Installed In-  
sulation Requirements table. When insulating the covers,  
allow for service access and removal of covers. To estimate  
water-box cover areas, refer to certified drawings.  
High humidity jobsite locations may require field sup-  
plied and installed insulation on the float chamber, suction  
housing, and the lower half of the condenser.  
INSULATION  
COMPONENT  
SIZE  
ft2  
m2  
30-32  
35-37  
40-42  
45-47  
50-52  
55-57  
96  
108  
109  
122  
115  
130  
8.9  
10.0  
10.1  
11.3  
10.7  
12.1  
Cooler  
Misc. Liquid Lines  
Economizer  
Compressor Motor  
All Sizes  
All Sizes  
All Sizes  
21  
20  
17  
2.0  
1.9  
1.6  
Factory insulation — Thermal insulation is factory-  
provided to the following areas:  
• Cooler (not including waterbox)  
• Suction line  
• Compressor and motor  
• Oil cooling line and oil return system line (oil and refrig-  
erant lines at or near evaporator pressure are insulated)  
• VFD cooling line (oil and refrigerant lines at or near  
evaporator pressure are insulated)  
• Motor cooling line  
CONDENSATION VS RELATIVE HUMIDITY*  
ROOM DRY-BULB TEMPERATURE  
AMOUNT OF  
80 F (27 C)  
90 F (32 C)  
100 F (38 C)  
CONDENSATION  
• Vaporizer  
• Liquid line and discharge line  
• Float chamber  
% Relative Humidity  
None  
80  
87  
94  
76  
84  
91  
70  
77  
84  
Slight  
Extensive  
• Optional economizer (including vent line and econo-  
mizer muffler)  
Factory insulation is not available for the waterboxes.  
*These approximate figures are based on 35 F (1.7 C) saturated suction  
temperature. A 2° F (1.1° C) change in saturated suction temperature  
changes the relative humidity values by 1% in the same direction.  
Insulation applied at the factory is 1/2-in. (13 mm) thick  
closed cell and 1/2-in. (13 mm) open cell PVC-Nitrile foam.  
Some parts of the chiller are also treated with an outer  
layer of /16-in. (5 mm) thick vinyl. The /2-in. (13 mm)  
closed cell foam has a thermal conductivity K value of  
0.28 (BTU in.)/(hr sqft °F) [0.0404 W/(m °C)] and  
Minimum fluid loop volume  
Minimum fluid volume must be in excess of 1.5 gal per ton  
(20 L per kW) for comfort cooling applications and apply 3  
to 5 gal per ton (40 to 66 L per kW) fluid loop volume for  
process applications.  
3
1
23  
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Guide specifications  
1.02 QUALITY ASSURANCE  
Variable Speed Screw Chiller  
A. Chiller performance shall be rated in accordance  
with AHRI Standard 550/590, latest edition.  
B. Equipment and installation shall be in compliance  
with ANSI/ASHRAE 15 (latest edition).  
C. Cooler and condenser refrigerant side shall include  
ASME “U” stamp and nameplate certifying compli-  
ance with ASME Section VIII, Division 1 code for  
unfired pressure vessels.  
D. A manufacturer’s data report is required to verify  
pressure vessel construction adherence to ASME  
vessel construction requirements. Form U-1 as  
required per ASME code rules is to be furnished  
to the owner. The U-1 Form must be signed by a  
qualified inspector, holding a National Board  
Commission, certifying that construction conforms  
to the latest ASME Code Section VIII, Div. 1 for  
pressure vessels. The ASME symbol “U” must also  
be stamped on the heat exchanger. Vessels specifi-  
cally exempted from the scope of the code must  
come with material, test, and construction methods  
certification and detailed documents similar to  
ASME U-1; further, these must be signed by an offi-  
cer of the company.  
HVAC Guide Specifications  
Size Range: 300 to 550 Tons (1055 to 1934 kW)  
Nominal  
Carrier Model Number: 23XRV  
Part 1 — General  
1.01 SYSTEM DESCRIPTION  
A. Microprocessor-controlled liquid chiller shall use a  
semi-hermetic screw compressor using refrigerant  
HFC-134a only. Chiller refrigerant shall not have a  
planned phase out date.  
B. If a manufacturer proposes a liquid chiller using  
HCFC-123 refrigerant, which has a planned phase  
out date, then the manufacturer shall include in the  
chiller price:  
1. A vapor activated alarm system consisting of all  
alarms, sensors, safeties, and ventilation equip-  
ment as required by ANSI/ASHRAE Standard  
15 Safety Code for Mechanical Refrigeration  
(latest edition) with the quotation. System shall  
be capable of responding to HCFC-123 levels  
of 10 ppm Allowable Exposure Limit (AEL).  
2. A free-standing refrigerant storage tank and  
pumpout unit shall be provided. The storage  
vessels shall be designed per ASME Section VIII  
Division 1 code with 300 psig (2068 kPa)  
design pressure. Double relief valves per ANSI/  
ASHRAE 15, latest edition, shall be provided.  
The tank shall include a liquid level gage and  
pressure gage. The pumpout unit shall use a  
semi-hermetic reciprocating compressor with  
water cooled condenser. Condenser water pip-  
ing, 3-phase motor power, and 115-volt control  
power shall be installed at the jobsite by the  
installing contractor.  
3. Zero emission purge unit capable of operating  
even when the chiller is not operating.  
4. Back-up relief valve to rupture disk.  
5. Factory-installed chiller pressurizing system to  
prevent leakage of noncondensables into the  
chiller during shutdown periods.  
E. Chiller shall be designed and constructed to meet  
UL and UL of Canada requirements and have labels  
appropriately affixed.  
F. Unit shall be manufactured in a facility registered to  
ISO 9001:2000 Manufacturing Quality Standard.  
G. Each compressor assembly shall undergo a mechan-  
ical run-in test to verify vibration levels, oil pressures,  
and temperatures are within acceptable limits. Each  
compressor assembly shall be proof tested at a mini-  
mum 204 psig (1407 kPa) and leak tested at  
185 psig (1276 kPa) with a tracer gas mixture.  
H. Entire chiller assembly shall be proof tested at  
204 psig (1407 kPa) and leak tested at 185 psig  
(1276 kPa) with a tracer gas mixture on the refriger-  
ant side. The leak test shall not allow any leaks  
greater than 0.5 oz per year of refrigerant. The  
water side of each heat exchanger shall be hydro-  
statically tested at 1.3 times rated working pressure.  
I. Prior to shipment, the chiller automated controls  
test shall be executed to check for proper wiring and  
ensure correct controls operation.  
J. Chillers shall have factory-mounted, factory-wired  
and factory-tested unit-mounted variable frequency  
drive (VFD). Proper VFD operation shall be con-  
firmed prior to shipment.  
6. Plant room ventilation.  
7. Removal and disposal of refrigerant at the end  
of the phase out period.  
8. Chillers utilizing a purge unit shall include in the  
machine price the costs to perform the follow-  
ing regular maintenance procedures:  
a. Weekly: Check refrigerant charge.  
1.03 DELIVERY, STORAGE AND HANDLING  
b. Quarterly: Charge purge unit dehydrator at  
least quarterly, more often if necessary.  
Clean foul gas strainer. Perform chemical  
analysis of oil.  
c. Annually: Clean and inspect all valves. Drain  
and flush purge shell. Clean orifices.  
A. Unit shall be stored and handled in accordance with  
manufacturer’s instructions.  
B. Unit shall be shipped with all refrigerant piping and  
control wiring factory-installed.  
C. Unit shall be shipped charged with oil and full  
charge of refrigerant HFC-134a or a nitrogen hold-  
ing charge as specified on the equipment schedule.  
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D. Unit shall be shipped with firmly attached labels that  
indicate name of manufacturer, chiller model num-  
ber, chiller serial number, and refrigerant used.  
b. Oil pressure sensor with differential readout  
at main control center.  
c. Oil pressure regulator.  
E. If the unit is to be exported, the manufacturer shall  
provide sufficient protection against sea water corro-  
sion, making the unit suitable for shipment in a  
standard open top ocean shipping container.  
F. Chiller and starter shall be stored indoors, protected  
from construction dirt and moisture. Chiller shall be  
inspected under shipping tarps, bags, or crates to be  
sure water has not collected during transit. Protec-  
tive shipping covers shall be kept in place until  
machine is ready for installation. The inside of the  
protective cover shall meet the following criteria:  
d. Oil filter with isolation valves to allow filter  
change without removal of refrigerant  
charge.  
e. Oil sump heater [115 v, 50 or 60 Hz] con-  
trolled from unit microprocessor.  
f. Oil reservoir temperature sensor with main  
control center digital readout.  
g. All wiring to oil pump, oil heater, and con-  
trols shall be pre-wired in the factory and  
power shall be applied to check proper  
operation prior to shipment.  
1. Temperature is between 40 F (4.4 C) and  
120 F (48.9 C)  
2. Relative humidity is between 10% and 80%  
non-condensing.  
7. Compressor shall be fully field serviceable.  
Compressors that must be removed and  
returned to the factory for service shall be  
unacceptable.  
1.04 WARRANTY  
8. Acoustical attenuation shall be provided as  
required, to achieve a maximum (full load  
or part load) sound level, measured per AHRI  
Standard 575 (latest edition).  
Warranty shall include parts and labor for one year  
after start-up or 18 months from shipment, which-  
ever occurs first. A refrigerant warranty shall be  
provided for a period of 5 years.  
C. Motor:  
Part 2 — Products  
2.01 EQUIPMENT  
A. General:  
1. Compressor motor shall be of the semi-  
hermetic, liquid refrigerant cooled, squirrel  
cage, induction type suitable for voltage shown  
on the equipment schedule.  
2. If an open (air cooled) motor is provided, a  
compressor shaft seal leakage containment  
system shall be provided:  
Factory-assembled, single piece, liquid chiller shall  
consist of compressor, motor, VFD, lubrication sys-  
tem, cooler, condenser, initial oil and refrigerant  
operating charges, microprocessor control system,  
and documentation required prior to start-up.  
a. An oil reservoir shall collect oil and refriger-  
ant that leaks past the seal.  
b. A float device shall be provided to open  
when the reservoir is full, directing the  
refrigerant/oil mixture back into the com-  
pressor housing.  
B. Compressor:  
1. One variable speed, tri-rotor screw compressor  
of the high performance type.  
2. Compressor and motor shall be hermetically  
sealed into a common assembly and arranged  
for easy field servicing.  
3. The compressor motor shall be accessible for  
servicing without removing the compressor  
base from the chiller. Connections to the com-  
pressor casing shall use O-rings and gaskets to  
reduce the occurrence of refrigerant leakage.  
Connections to the compressor shall be flanged  
or bolted for easy disassembly.  
4. Compressor bearings must have individual  
design life of 500,000 hours or greater.  
5. Compressor shall provide capacity modulation  
from 100% to 15% capacity without the use of  
hot gas bypass or mechanical unloaders.  
6. Compressor shall be provided with a factory-  
installed positive pressure lubrication system to  
deliver oil under pressure to bearings and rotors  
at all operating conditions. Lubrication system  
shall include:  
c. A refrigerant sensor shall be located next to  
the open drive seal to detect leaks.  
3. Motors shall be suitable for operation in a  
refrigerant atmosphere and shall be cooled by  
atomized refrigerant in contact with the motor  
windings.  
4. Motor stator shall be arranged for service or  
removal with only minor compressor disassem-  
bly and without removing main refrigerant  
piping connections.  
5. Full load operation of the motor shall not  
exceed nameplate rating.  
6. One motor winding temperature sensor (and on  
spare) shall be provided.  
7. Should the mechanical contractor choose to  
provide a chiller with an air-cooled motor  
instead of the specified semi-hermetic motor,  
the contractor shall install additional cooling  
a. Oil pump with factory-installed motor con-  
tactor with overload protection.  
25  
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Guide specifications (cont)  
equipment to dissipate the motor heat as per  
the following formula:  
Btuh = (FLkW motor) (0.05) (3413)  
Btuh = (FLkW motor) (171)  
and, alternately  
f. Integrated controls shall coordinate motor  
speed to optimize chiller performance over a  
wide variety of operating conditions.  
2. Enclosure:  
a. Pre-painted unit mounted, NEMA 1 cabinet  
shall include hinged, lockable doors and  
removable lifting lugs.  
Tons = Btuh/12,000  
The additional piping, valves, air-handling  
equipment, insulation, wiring, switchgear  
changes, ductwork, and coordination with other  
trades shall be the responsibility of the mechan-  
ical contractor. Shop drawings reflecting any  
changes to the design shall be included in the  
submittal, and incorporated into the final as-  
built drawings for the project.  
b. The VFD shall have a short circuit interrupt  
and withstand rating of at least 65,000 amps.  
c. Provisions to padlock main disconnect han-  
dle in the “Off” positions shall be provided.  
Mechanical interlock to prevent opening  
cabinet door with disconnect in the “On”  
position or moving disconnect to the “On”  
position while the door is open shall be  
provided.  
8. Also, if an open motor is provided, a mechani-  
cal room thermostat shall be provided and set  
at 104 F (40 C). If this temperature is  
exceeded, the chillers shall shut down and an  
alarm signal shall be generated to the central  
Energy Management System (EMS) display  
module, prompting the service personnel to  
diagnose and repair the cause of the overtem-  
perature condition. The mechanical contractor  
shall be responsible for all changes to the  
design, including coordination with temperature  
control, electrical and other trades. In addition,  
the electrical power consumption of any auxil-  
iary ventilation and/or mechanical cooling  
required to maintain the mechanical room con-  
ditions stated above shall be considered in the  
determination of conformance to the scheduled  
chiller energy efficiency requirement.  
d. Provisions shall be made for top entry of  
incoming line power cables.  
3. Heat Sink:  
a. The heat sink shall be refrigerant cooled.  
Heat sink and mating flanges shall be suit-  
able for ASME design working pressure of  
185 psig (1276 kPa).  
b. Refrigerant cooling shall be metered to  
maintain heat sink temperature within  
acceptable limits for ambient temperature.  
4. VFD Rating:  
a. Drive shall be suitable for operation at name-  
plate voltage 10%.  
b. Drive shall be suitable for continuous opera-  
tion at 100% of nameplate amps and 150%  
of nameplate amps for 5 seconds.  
D. Unit-Mounted Variable Frequency Drive (VFD) with  
Built-In Harmonic LiquiFlo™ II Filter:  
c. Drive shall comply with applicable ANSI,  
NEMA, UL and NEC standards.  
The compressor shall be factory-mounted, factory-  
wired and factory-tested prior to shipment by the  
chiller manufacturer. All interconnecting wiring and  
piping between the VFD and the chiller shall be  
factory-installed. Customer electrical connection for  
compressor motor power shall be limited to main  
power leads to the VFD, and wiring liquid pumps  
and tower fans to the chiller control circuit. The  
VFD shall incorporate the following features:  
d. Drive shall be suitable for operation in ambient  
temperatures between 40 and 122 F (4 and  
50 C), 95% humidity (non-condensing) for  
altitudes up to 6000 ft (1829 m) above sea  
level. Specific drive performance at jobsite  
ambient temperature and elevation shall be  
provided by the manufacturer in the bid.  
5. User Interface:  
1. Design:  
A single display shall provide interface for pro-  
gramming and display of VFD and chiller  
parameters. Viewable parameters include:  
a. Operating, configuration and fault messages  
b. Frequency in hertz  
c. Load and line side voltage and current (at the  
VFD)  
d. kW  
a. The VFD shall be refrigerant cooled,  
microprocessor based, pulse width modu-  
lated design. Water cooled designs are not  
acceptable.  
b. Input and output power devices shall be  
Insulated Gate Bipolar Transistors (IGBTs).  
c. Rectifier shall convert incoming fixed volt-  
age/frequency to fixed DC voltage.  
e. IGBT temperature  
6. VFD Performance:  
d. Transistorized inverter and control regulator  
shall convert fixed DC voltage to a sinusoidal  
PWM waveform.  
e. Low voltage control sections and main  
power sections shall be physically isolated.  
a. The VFD Voltage Total Harmonic Distortion  
(THD) and Harmonic Current Total Demand  
Distortion (TDD) shall not exceed IEEE-519  
requirements using the VFD circuit breaker  
26  
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input terminals as the point of common cou-  
pling (PCC).  
i. Motor overload protection (NEMA Class 10)  
j. Motor over temperature protection  
b. The VFD full load efficiency shall meet or  
exceed 97% at 100% VFD rated ampacity.  
c. Active rectifier shall regulate unity displace-  
ment power factor to 0.99 or higher.  
11. VFD Testing:  
The VFD shall be factory-mounted, factory-  
wired and factory-tested on the chiller prior to  
shipment.  
d. Voltage boost capability to provide full motor  
voltage at reduced line voltage conditions.  
e. The VFD shall feature soft start, linear accel-  
eration, and coast to stop capabilities.  
f. Base motor frequency shall permit motor to  
be utilized at nameplate voltage. Adjustable  
frequency range shall permit capacity con-  
trol down to 15%.  
g. The VFD shall have 150% instantaneous  
torque generation.  
E. Evaporator and Condenser:  
1. Evaporator and condenser shall be of shell and  
tube type construction, each in separate shells.  
Units shall be fabricated with high-performance  
tubing, steel shell and tube sheets with fabri-  
cated steel waterboxes. Waterboxes shall be  
nozzle-in-head type with stub out nozzles having  
Victaulic grooves to allow for use of Victaulic  
couplings.  
2. Tubing shall be copper, high-efficiency type,  
with integral internal and external enhance-  
ment unless otherwise noted. Tubes shall be  
nominal 3/4-in. OD with nominal wall thickness  
of 0.025 in. measured at the root of the fin  
unless otherwise noted. Tubes shall be rolled  
into tube sheets and shall be individually  
replaceable. Tube sheet holes shall be double  
grooved for joint structural integrity. Intermedi-  
ate support sheet spacing shall not exceed  
36 in. (914 mm).  
7. VFD Electrical Service (single point power):  
a. The VFD shall have input circuit breaker  
with minimum 65,000 amp interrupt  
capacity.  
b. The VFD shall have standard branch oil  
pump circuit breaker to provide power for  
chiller oil pump.  
c. The VFD shall have standard 3 KVA control  
power transformer with circuit breaker to  
provide power for oil heater, VFD controls  
and chiller controls.  
d. The branch oil pump circuit breaker and  
control power transformer shall be factory-  
wired.  
3. Waterboxes and nozzle connections shall be  
designed for 150 psig (1034 kPa) minimum  
working pressure unless otherwise noted.  
Nozzles should have grooves to allow use of  
Victaulic couplings.  
4. The tube sheets of the cooler and condenser  
shall be bolted together to allow for field disas-  
sembly and reassembly.  
e. Input power shall be 380/460 vac, 10%,  
3 Phase, 50/60 Hz, 2% Hz.  
8. Discrete Outputs:  
5. The vessel shall display an ASME nameplate  
that shows the pressure and temperature data  
and the “U” stamp for ASME Section VIII,  
Division 1. A re-seating pressure relief valve(s)  
shall be installed on each heat exchanger. If a  
non-reseating type is used, a backup reseating  
type shall be installed in series.  
6. Waterboxes shall have vents, drains, and covers  
to permit tube cleaning within the space shown  
on the drawings. A thermistor type temperature  
sensor with quick connects shall be factory-  
installed in each water nozzle.  
7. Cooler shall be designed to prevent liquid refrig-  
erant from entering the compressor. Devices  
that introduce pressure losses (such as mist  
eliminators) shall not be acceptable because  
they are subject to structural failures that can  
result in extensive compressor damage.  
8. Tubes shall be individually replaceable from  
either end of the heat exchanger without affect-  
ing the strength and durability of the tube sheet  
and without causing leakage in adjacent tubes.  
115-v discrete contact outputs shall be provided  
for:  
a. Circuit breaker shunt trip  
b. Chilled water pump  
c. Condenser water pump  
d. Alarm status  
9. Analog Output:  
An analog (4 to 20 mA) output for head pres-  
sure reference shall be provided. This signal  
shall be suitable to control a 2-way or 3-way  
water regulating valve in the condenser piping.  
10. Protection (the following shall be supplied):  
a. Under-voltage  
b. Over voltage  
c. Phase loss  
d. Phase reversal  
e. Ground fault  
f. Phase unbalance protection  
g. Single cycle voltage loss protection  
h. Programmable auto re-start after loss of  
power  
9. The condenser shell shall include a FLASC  
(Flash Subcooler) which cools the condensed  
27  
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Guide specifications (cont)  
liquid refrigerant to a reduced temperature,  
thereby increasing the refrigeration cycle  
efficiency.  
10) Variable frequency drive status  
11) Optional spare input channels  
12) Line current and voltage for each phase  
13) Frequency, kW, kWhr, demand kW  
g. Schedule Function:  
F. Refrigerant Flow Control:  
To improve part load efficiency, liquid refrigerant  
shall be metered from the condenser to the cooler  
using a float-type metering valve to maintain the  
proper liquid level of refrigerant in the heat  
exchangers under both full and part load operating  
conditions. By maintaining a liquid seal at the float  
valve, bypassed hot gas from the condenser to the  
cooler is eliminated.  
The chiller controls shall be configurable for  
manual or automatic start-up and shutdown.  
In automatic operation mode, the controls  
shall be capable of automatically starting and  
stopping the chiller according to a stored  
user programmable occupancy schedule.  
The controls shall include built-in provisions  
for accepting:  
1) A minimum of two 365-day occupancy  
schedules.  
2) Minimum of 8 separate occupied/unoc-  
cupied periods per day  
3) Daylight savings start/end  
4) 18 user-defined holidays  
5) Means of configuring an occupancy  
timed override  
6) Chiller start-up and shutdown via remote  
contact closure  
G. Controls, Safeties, and Diagnostics:  
1. Controls:  
a. The chiller shall be provided with a factory-  
installed and factory-wired microprocessor  
control center. The control center shall include  
a 16-line by 40-character liquid crystal display,  
4 function keys, stop button, and alarm light.  
Other languages are available using the inter-  
national language translator software.  
b. All chiller and motor control monitoring shall  
be displayed at the chiller control panel.  
c. The controls shall make use of non-volatile  
memory.  
d. The chiller control system shall have the ability  
to interface and communicate directly to the  
building control system.  
e. The default standard display screen shall simul-  
taneously indicate the following minimum  
information:  
h. Service Function:  
The controls shall provide a password  
protected service function which allows  
authorized individuals to view an alarm  
history file which shall contain the last  
25 alarm/alert messages with time and date  
stamp. These messages shall be displayed in  
text form, not codes.  
i. Network Window Function:  
1) Date and time of day  
2) 24-character primary system status  
message  
3) 24-character secondary status message  
4) Chiller operating hours  
5) Entering chilled water temperature  
6) Leaving chilled water temperature  
7) Evaporator refrigerant temperature  
8) Entering condenser water temperature  
9) Leaving condenser water temperature  
10) Condenser refrigerant temperature  
11) Oil supply pressure  
Each chiller control panel shall be capable of  
viewing multiple point values and statuses  
from other like controls connected on a  
common network, including controller main-  
tenance data. The operator shall be able to  
alter the remote controller’s set points or  
time schedule and to force point values or  
statuses for those points that are operator  
forcible. The control panel shall also have  
access to the alarm history file of all like con-  
trollers connected on the network.  
j. Pump Control:  
12) Oil sump temperature  
13) Percent motor rated load amps (RLA)  
Upon request to start the compressor, the  
control system shall start the chilled and  
condenser water pumps and shall verify that  
flows have been established.  
f. In addition to the default screen, status  
screens shall be accessible to view the status  
of every point monitored by the control  
center including:  
k. Ramp Loading:  
A user-configurable ramp loading rate, effec-  
tive during the chilled water temperature  
pulldown period, shall prevent a rapid  
increase in compressor power consumption.  
The controls shall allow configuration of the  
ramp loading rate in either degrees per min-  
ute of chilled water temperature pulldown or  
percent motor amps per minute. During the  
ramp loading period, a message shall be  
1) Evaporator pressure  
2) Condenser pressure  
3) Compressor speed  
4) Bearing oil supply temperature  
5) Compressor discharge temperature  
6) Motor winding temperature  
7) Number of compressor starts  
8) Control point settings  
9) Discrete output status of various devices  
28  
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displayed informing the operator that the  
chiller is operating in ramp loading mode.  
parameters are outside their normal operat-  
ing range:  
l. Chilled Water Reset:  
1) High condenser pressure  
2) High motor temperature  
The control center shall allow reset of the  
chilled water temperature set point based on  
any one of the following criteria:  
1) Chilled water reset based on an external  
4 to 20 mA signal.  
3) Low evaporator refrigerant temperature  
4) High motor amps  
5) High VFD rectifier temperature  
6) High VFD inverter temperature  
c. During the capacity override period, a pre-  
alarm (alert) message shall be displayed  
informing the operator which condition is  
causing the capacity override. Once the con-  
dition is again within acceptable limits, the  
override condition shall be terminated and  
the chiller shall revert to normal chilled  
water control. If during either condition the  
protective limit is reached, the chiller shall  
shut down and a message shall be displayed  
informing the operator which condition  
caused the shutdown and alarm.  
2) Chilled water reset based on a remote  
temperature sensor (such as outdoor  
air).  
3) Chilled water reset based on water tem-  
perature rise across the evaporator.  
m. Demand Limit:  
The control center shall limit amp draw of  
the compressor to the rated load amps or to  
a lower value based on one of the following  
criteria:  
1) Demand limit based on a user input  
ranging from 40% to 100% of compres-  
sor rated load amps  
d. Internal built in safeties shall protect the  
chiller from loss of water flow. Differential  
pressure switches shall not be allowed to be  
the only form of freeze protection.  
2) Demand limit based on external 4 to  
20 mA signal.  
n. Controlled Compressor Shutdown:  
3. Diagnostics and Service:  
The controls shall be capable of being  
configured to soft stop the compressor. The  
display shall indicate “shutdown in progress.”  
a. A self diagnostic controls test shall be an  
integral part of the control system to allow  
quick identification of malfunctioning  
components.  
2. Safeties:  
b. Once the controls test has been initiated, all  
pressure and temperature sensors shall be  
checked to ensure they are within normal  
operating range. A pump test shall automat-  
ically energize the chilled water pump, con-  
denser water pump, and oil pump. The  
control system shall confirm that water flow  
and oil pressure have been established and  
require operator confirmation before pro-  
ceeding to the next test.  
a. Unit shall automatically shut down when any  
of the following conditions occur (each of  
these protective limits shall require manual  
reset and cause an alarm message to be dis-  
played on the control panel screen, inform-  
ing the operator of the shutdown cause):  
1) Motor overcurrent  
2) Over voltage*  
3) Under voltage*  
4) Single cycle dropout*  
c. In addition to the automated controls test,  
the controls shall provide a manual test  
which permits selection and testing of indi-  
vidual control components and inputs. A  
thermistor test and transducer test shall dis-  
play on the ICVC screen the actual reading  
of each transducer and each thermistor  
installed on the chiller. All out-of-range sen-  
sors shall be identified. Pressure transducers  
shall be serviceable without the need for  
refrigerant charge removal or isolation.  
5) Low oil sump temperature  
6) Low evaporator refrigerant temperature  
7) High condenser pressure  
8) High motor temperature  
9) High compressor discharge temperature  
10) Low oil pressure  
11) Prolonged stall  
12) Loss of cooler water flow  
13) Loss of condenser water flow  
14) Variable frequency drive fault  
15) High variable frequency drive temperature  
4. Multiple Chiller Control:  
* Shall not require manual reset or cause an  
alarm if auto-restart after power failure is  
enabled.  
The chiller controls shall be supplied as stan-  
dard with a two-chiller lead/lag and a third  
chiller standby system. The control system shall  
automatically start and stop a lag or second  
chiller on a two-chiller system. If one of the two  
chillers on line goes into a fault mode, the third  
standby chiller shall be automatically started.  
The two-chiller lead/lag system shall allow  
b. The control system shall detect conditions  
that approach protective limits and take self-  
corrective action prior to an alarm occur-  
ring. The system shall automatically reduce  
chiller capacity when any of the following  
29  
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Guide specifications (cont)  
manual rotation of the lead chiller and a stag-  
gered restart of the chillers after a power fail-  
ure. The lead/lag system shall include load  
balancing if configured to do so.  
2. Spring Isolators:  
Spring isolators shall be field furnished and  
selected for the desired degree of isolation.  
3. Spare Sensors with Leads:  
Unit manufacturer shall furnish additional tem-  
perature sensors and leads.  
4. Sound Insulation Kit:  
H. Electrical Requirements:  
1. Electrical contractor shall supply and install  
main electrical power line, disconnect switches,  
circuit breakers, and electrical protection  
devices per local code requirements and as indi-  
cated necessary by the chiller manufacturer.  
2. Electrical contractor shall wire the chilled water  
pump and flow, condenser water pump and  
flow, and tower fan control circuit to the chiller  
control circuit.  
Unit manufacturer shall furnish a sound insula-  
tion kit that covers the compressor housing,  
motor housing, compressor discharge pipe,  
suction line, evaporator, and economizer (if  
equipped).  
5. Stand-Alone Pumpout Unit:  
A free-standing pumpout unit shall be provided.  
The pumpout unit shall use a semi-hermetic  
reciprocating compressor with liquid-cooled  
condenser. Condenser liquid piping and  
3-phase motor power shall be installed at the  
jobsite by the installing contractor.  
3. Electrical contractor shall supply and install  
electrical wiring and devices required to inter-  
face the chiller controls with the building control  
system if applicable.  
4. Electrical power shall be supplied to the unit at  
the voltage, phase, and frequency listed in the  
equipment schedule.  
6. Separate Storage Tank and Pumpout Unit:  
A free-standing refrigerant storage tank and  
pumpout unit shall be provided. The storage  
vessels shall be designed per ASME Section VIII  
Division 1 code with 150 psig (1034 kPa)  
design pressure. Double relief valves per ANSI/  
ASHRAE 15, latest edition, shall be provided.  
The tank shall include a liquid level gage and  
pressure gage. The pumpout shall use a  
hermetic reciprocating compressor with water-  
cooled condenser. Condenser water piping and  
3-phase motor power shall be installed at the  
jobsite by the installing contractor.  
I. Piping Requirements — Instrumentation and Safeties:  
1. Mechanical contractor shall supply and install  
pressure gages in readily accessible locations in  
piping adjacent to the chiller such that they can  
be easily read from a standing position on the  
floor. Scale range shall be such that design val-  
ues shall be indicated at approximately mid-  
scale.  
2. Gages shall be installed in the entering and leav-  
ing water lines of the cooler and condenser.  
J. Vibration Isolation:  
Chiller manufacturer shall furnish neoprene isolator  
pads for mounting equipment on a level concrete  
surface.  
7. Building Control System Interface (LON):  
The chiller control system shall have the ability  
to interface and communicate directly to the  
building control using a LON based system. The  
LonWorks Carrier Translator shall output data  
in standard LON profiles.  
K. Start-Up:  
1. The chiller manufacturer shall provide a factory-  
trained representative, employed by the chiller  
manufacturer, to perform the start-up proce-  
dures as outlined in the Start-Up, Operation  
and Maintenance manual provided by the  
chiller manufacturer.  
8. Refrigerant Charge:  
The chiller shall ship from the factory fully  
charged with R-134a refrigerant and oil.  
9. Thermal Insulation:  
2. Manufacturer shall supply the following  
literature:  
Unit manufacturer shall insulate the cooler  
shell, economizer, suction elbow, motor shell  
and motor cooling lines. Insulation shall be 1 in.  
(25.4 mm) thick with a thermal conductivity not  
exceeding  
a. Start-up, operation and maintenance  
instructions.  
b. Installation instructions.  
c. Field wiring diagrams.  
(Btu · in.)  
hr. Ft2 F  
W
m C  
0.28  
0.0404  
d. One complete set of certified drawings.  
L. Special Features:  
(
)
and shall conform to UL standard 94, classifica-  
tion 94 HF-1.  
1. Soleplate Package:  
Unit manufacturer shall furnish a soleplate  
package consisting of soleplates, jacking  
screws, leveling pads, and neoprene pads.  
10. Automatic Hot Gas Bypass:  
Hot gas bypass valve and piping shall be  
factory-furnished to permit chiller operation for  
extended periods of time.  
30  
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11. Cooler and Condenser Tubes:  
18. Optional Compressor Discharge Isolation Valve  
and Liquid Line Ball Valve:  
Contact a local Carrier Representative for other  
tube offerings.  
12. Cooler and Condenser Passes:  
These items shall be factory-installed to allow  
isolation of the refrigerant charge in the con-  
denser for servicing the compressor.  
Unit manufacturer shall provide the cooler and/  
or condenser with 1, 2 or 3 pass configuration  
on the water side.  
19. Pumpout Unit:  
A refrigerant pumpout system shall be installed  
on the chiller. The pumpout system shall  
include a hermetic compressor and drive, inter-  
nal piping, internal wiring, and motor. Field-  
supplied main power wiring and water piping  
shall be required.  
13. Nozzle-In-Head, 300 psig (2068 kPa):  
Unit manufacturer shall furnish nozzle-in-head  
style waterboxes on the cooler and/or con-  
denser rated at 300 psig (2068 kPa).  
14. Marine Waterboxes:  
20. BACnet Communication Option:  
Unit manufacturer shall furnish marine style  
waterboxes on cooler and/or condenser rated  
at 150 psig (1034 kPA).  
Shall provide factory installed communication  
capability with a BACnet MS/TP network.  
Allows integration with i-Vu® Open control sys-  
tem or a BACnet building automation system.  
15. Marine Waterboxes:  
Unit manufacturer shall furnish marine style  
waterboxes on cooler and/or condenser rated  
at 300 psig (2068 kPA).  
denser for servicing the compressor.  
21. Optional Seismic Isolation Package:  
Package shall meet International Building Code  
and ASCE 7 seismic qualification requirements  
in concurrence with ICC ES AC156 Accep-  
tance Criteria for Seismic Qualification by  
Shake-Table Testing of Nonstructural Compo-  
nents and Systems. Manufacturer shall provide  
seismic certificate from OSHPD (California  
only).  
16. Flanged Water Nozzles:  
Unit manufacturer shall furnish standard  
flanged piping connections on the cooler and/  
or condenser.  
17. Hinges:  
Unit manufacturer shall furnish hinges on  
waterboxes to facilitate tube cleaning.  
31  
910  
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Carrier Corporation • Syracuse, New York 13221  
910  
5-10  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Section 9  
Pg 32  
Catalog No. 04-52230002-01  
Printed in U.S.A.  
Form 23XRV-3PD  
Replaces: 23XRV-2PD  
Tab 9a  
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