NWCR Water Cooled Chillers
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NWCR Water Cooled Chillers
The NWCR Series of Water Cooled Chillers utilizes refrigerant 410A and includes models ranging in capacity from 15 to 75 tons to meet a wide range of comfort cooling and process load conditions. Each model is designed for quiet, reliable, high efficiency operation and built to withstand demanding continuous duty cycles.
At the heart of the NWCR product line are the highly efficient scroll compressor, brazed plate evaporator and shell-and tube condenser.
The integral digital controller continually optimizes unit operation, undertakes fault avoidance strategy during abnormal operating conditions, and displays operational and diagnostic information at the unit and at a remote location if needed.
All NWCR products have cleanable and serviceable shell-and-tube condensers with enhanced copper tubes for high efficiency. This makes the NWCR products suitable for open loop systems and cooling tower applications.
The 40 through 70 ton models have dual independent refrigerant circuits to eliminate 100% capacity loss in the event of a compressor failure.
NWCR Scroll Water Cooled Chillers
15 to 75 Tons
NWCR Series - Water Cooler Chillers
- Digital controller with BMS Control Interface
- Dual refrigerant circuits on 40 through 75 ton models
- Serviceable shell & tube condenser
- Optional factory installed water regulating valve, full sound attenuation enclosure and/or sound blankets
Superior by Design
State-of-the-Art
The NWCR Series of Water Cooled Chillers includes models ranging in capacity from 15 to 75 tons to meet a wide range of load conditions. Each model is designed for quiet, reliable, high efficiency operation and built to withstand demanding continuous duty cycles.
At the heart of the NWCR product line are the highly efficient scroll compressor and brazed plate evaporator, and the serviceable shell-and tube condenser.
The integral controller continually optimizes unit operation, undertakes fault avoidance strategy during abnormal operating conditions, and displays operational and diagnostic information at the unit and at a remote location if needed.
Efficiency
NWCR chillers combine high efficiency Scroll Compressors and Brazed Plate evaporators to offer full and part load efficiencies that are unmatched when compared to products utilizing reciprocating compressors. Still higher efficiencies are realized at part load conditions.
Reliability
Since its introduction, Scroll Compressors have proven to be one of the most reliable compressors available. While high reliability is inherent with the scroll technology, digital control technology has proven to increase reliability and minimize downtime through sophisticated operational logic, fault avoidance strategy and the ability to stably control peripherals such as water regulating valves and cooling tower fan and pump VFDs.
The 40 through 70 ton models have dual refrigerant circuits to eliminate 100% capacity loss in the event of a compressor failure.
Construction
All NWCR products are assembled on a rugged steel frame with integral lifting provisions and topcoated with industrial two-part epoxy direct-to-metal paint.
Vessels
All NWCR products have cleanable and serviceable shell-and-tube condensers with enhanced copper tubes for high efficiency. This makes the NWCR products suitable for open loop systems and cooling tower applications.
Control
The powerful controller provides complete chiller control and standard interface to BACnet IP and Modbus BMS controls. LonTalk, BACnet MS/TP or Johnson N2 interface is optional.
Control Panel
All NWCR Control Panels are complete with fused control power transformer, safety and operational control components and digital controller boards. Digital controller display/input screen is located in the front door of control panel.
Warranty
All NWCR products are backed by the Standard One Year Limited Warranty. Optional 5 year compressor warranty is available.
Options
Available factory-installed options for NWCR products include non-fused disconnect, full sound attenuation enclosure and/or sound blankets, phase monitor, integral digitally controlled condenser water regulating valve, LonTalk, BACnet MS/TP, Johnson N2 and ice building control. Ship loose options include flow switch and vibration isolation kit.
Dimensions and Specifications
|
Unit Size |
Dimensions |
Unit Weight |
* Connection Sizes |
Capacity Steps (%) |
MCA @ 60 Hz, 3f |
||||||
|
L |
W |
H |
Evap Water (VIC) |
Cond Water (FPT) |
208/230 Volt |
460 Volt |
|||||
|
In |
Out |
In |
Out |
||||||||
|
15 |
65” |
31¼” |
64½” |
1100 lb. |
2” |
2” |
2” |
2” |
100/50 |
67 |
34 |
|
20 |
65” |
31¼” |
64½” |
1160 lb. |
2½” |
2” |
2” |
2” |
100/50 |
75 |
41 |
|
26 |
65” |
31¼” |
64½” |
1280 lb. |
2½” |
2” |
3” |
3” |
100/50 |
116 |
52 |
|
30 |
65” |
31¼” |
64½” |
1320 lb. |
2½” |
2½” |
3” |
3” |
100/50 |
126 |
61 |
|
40 |
73” |
34½” |
75” |
2020 lb. |
3” |
3” |
2” |
2” |
100/75/50/25 |
142 |
77 |
|
52 |
73” |
34½” |
75” |
2200 lb. |
3” |
3” |
3” |
3” |
100/75/50/25 |
218 |
99 |
|
60 |
73” |
34½” |
75” |
2500 lb. |
3” |
3” |
3” |
3” |
100/75/50/25 |
238 |
115 |
|
70 |
73” |
34½” |
75” |
2840 lb. |
3” |
3” |
3” |
3” |
100/71/43/21 |
279 |
123 |
* All water connections are as noted (VIC = Victaulic, FPT = Female pipe thread). The 40-70 ton models have 2 condensers, therefore doubling the number of condenser connections.
Full Load Performance
|
Unit Size |
Evap LWT |
Entering Condenser Water Temperature |
||||||||||||||
|
75° F |
85° F |
95° F |
||||||||||||||
|
Tons |
kW |
EER |
Evap GPM |
Cond GPM |
Tons |
kW |
EER |
Evap GPM |
Cond GPM |
Tons |
kW |
EER |
Evap GPM |
Cond GPM |
||
|
15 |
42° F |
16.1 |
10.4 |
18.1 |
38.7 |
48.3 |
15.2 |
11.6 |
15.3 |
36.5 |
45.6 |
14.3 |
13.0 |
12.9 |
34.3 |
42.9 |
|
44° F |
16.7 |
10.4 |
18.7 |
40.1 |
50.1 |
15.8 |
11.7 |
15.8 |
37.9 |
47.3 |
14.8 |
13.1 |
13.3 |
35.6 |
44.5 |
|
|
46° F |
17.3 |
10.4 |
19.4 |
41.6 |
52.0 |
16.4 |
11.7 |
16.4 |
39.2 |
49.0 |
15.4 |
13.1 |
13.8 |
36.9 |
46.1 |
|
|
20 |
42° F |
21.8 |
14.0 |
18.4 |
52.2 |
62.2 |
20.7 |
15.4 |
15.9 |
49.5 |
60.6 |
19.4 |
17.2 |
13.4 |
46.5 |
58.8 |
|
44° F |
22.6 |
14.0 |
18.9 |
54.0 |
64.0 |
21.5 |
15.4 |
16.4 |
51.3 |
62.4 |
20.2 |
17.2 |
13.8 |
48.2 |
60.6 |
|
|
46° F |
23.3 |
14.1 |
19.5 |
55.8 |
65.8 |
22.2 |
15.5 |
16.9 |
53.1 |
64.2 |
20.9 |
17.3 |
14.3 |
50.0 |
62.4 |
|
|
26 |
42° F |
27.0 |
18.2 |
17.5 |
64.5 |
77.5 |
25.6 |
20.2 |
15.0 |
61.1 |
75.5 |
24.0 |
22.4 |
12.7 |
57.4 |
73.5 |
|
44° F |
28.0 |
18.3 |
18.0 |
66.9 |
79.9 |
26.5 |
20.3 |
15.4 |
63.3 |
77.7 |
24.9 |
22.5 |
13.1 |
59.5 |
75.6 |
|
|
46° F |
29.0 |
18.4 |
18.6 |
69.3 |
82.5 |
27.4 |
20.4 |
15.9 |
65.6 |
80.2 |
25.8 |
22.6 |
13.5 |
61.7 |
77.9 |
|
|
30 |
42° F |
31.2 |
21.7 |
17.0 |
74.7 |
90.1 |
29.7 |
23.9 |
14.7 |
70.9 |
88.0 |
27.9 |
26.4 |
12.6 |
66.8 |
85.7 |
|
44° F |
32.3 |
21.9 |
17.5 |
77.3 |
92.9 |
30.7 |
24.0 |
15.2 |
73.5 |
90.6 |
28.9 |
26.5 |
12.9 |
69.2 |
88.2 |
|
|
46° F |
33.5 |
22.1 |
17.9 |
80.0 |
95.7 |
31.8 |
24.2 |
15.6 |
76.1 |
93.4 |
30.0 |
26.7 |
13.3 |
71.7 |
90.8 |
|
|
40 |
42° F |
43.8 |
27.9 |
18.6 |
104.6 |
124.6 |
41.6 |
30.7 |
16.1 |
99.4 |
121.4 |
39.0 |
34.3 |
13.5 |
93.3 |
117.9 |
|
44° F |
45.3 |
28.0 |
19.2 |
108.3 |
128.3 |
43.1 |
30.8 |
16.6 |
103.0 |
125.1 |
40.5 |
34.4 |
14.0 |
96.8 |
121.6 |
|
|
46° F |
46.9 |
28.1 |
19.8 |
112.1 |
132.2 |
44.7 |
30.9 |
17.2 |
106.8 |
129.0 |
42.0 |
34.5 |
14.5 |
100.6 |
125.4 |
|
|
52 |
42° F |
53.9 |
36.4 |
17.7 |
128.9 |
154.8 |
51.1 |
40.3 |
15.1 |
122.1 |
150.9 |
48.1 |
44.8 |
12.8 |
115.0 |
147.1 |
|
44° F |
55.9 |
36.6 |
18.2 |
133.8 |
159.9 |
53.0 |
40.5 |
15.6 |
126.6 |
155.6 |
49.8 |
45.0 |
13.2 |
119.1 |
151.4 |
|
|
46° F |
58.1 |
36.9 |
18.8 |
138.9 |
165.1 |
55.0 |
40.8 |
16.1 |
131.6 |
160.7 |
51.7 |
45.2 |
13.6 |
123.6 |
156.0 |
|
|
60 |
42° F |
62.5 |
43.4 |
17.2 |
149.5 |
180.4 |
59.4 |
47.7 |
14.8 |
141.9 |
176.1 |
55.9 |
52.7 |
12.7 |
133.7 |
171.5 |
|
44° F |
64.8 |
43.8 |
17.6 |
154.9 |
186.0 |
61.5 |
48.0 |
15.3 |
147.2 |
181.5 |
58.0 |
53.1 |
13.0 |
138.6 |
176.7 |
|
|
46° F |
67.1 |
44.2 |
18.1 |
160.5 |
191.9 |
63.8 |
48.4 |
15.7 |
152.6 |
187.2 |
60.1 |
53.4 |
13.4 |
143.8 |
182.1 |
|
|
70 |
42° F |
72.6 |
49.5 |
17.5 |
173.7 |
209.0 |
68.5 |
54.4 |
15.0 |
163.8 |
202.7 |
64.1 |
60.0 |
12.8 |
153.2 |
196.2 |
|
44° F |
75.4 |
49.8 |
18.1 |
180.3 |
215.8 |
71.1 |
54.8 |
15.5 |
170.0 |
209.2 |
66.5 |
60.4 |
13.1 |
159.0 |
202.3 |
|
|
46° F |
78.2 |
50.1 |
18.6 |
187.1 |
222.7 |
73.8 |
55.1 |
16.0 |
176.5 |
215.9 |
69.0 |
60.8 |
13.6 |
165.2 |
208.7 |
|
Ratings are based on 60 Hz, R410A refrigerant, 10°F temperature drop through the evaporator and 10°Ftemperature rise through the condenser per ARI standard 550/590-2010
NWCR Chiller Options
Factory Installed Options
-
No communication – Digital Controller configured to operate without Building Management System (BMS) interface. No cost option.
-
Standard communication – Digital Controller configured to operate with BACnet IP and Modbus BMS protocols. No cost option.
-
LonTalk communication – Factory installed LonTalk communications board provides LonTalk BMS protocol to Digital Controller
-
BACnet MS/TP communication – Factory installed BACnet MS/TP communications board provides BACnet MS/TP BMS protocol to Digital Controller.
-
Johnson N2 communication – Factory installed Johnson N2 communications board provides Johnson N2 BMS protocol to digital controller.
-
Ice building mode – The NWCR product will be factory configured so that an external contact closure will initiate the Ice Build Mode. When initiated, the units leaving fluid temperature set point will be reset to build ice. Once the set point is satisfied, the unit will go out of Ice Build mode and back into the normal cooling mode with associated cooling mode leaving fluid set point. No cost option.
-
Digital power monitor – Factory installed digital, programmable power and phase monitor provides an additional level of protection over the base motor protection device.
-
Non-fused disconnect – Factory installed panel mounted disconnect with through the door operator.
-
Integral water regulating valve(s) – The factory installed water regulating valve(s) option provides a fully integrated discharge pressure control feature to the chiller. Control of the integral proportional water regulating valve is provided by the digital controller. One water regulating valve arrangement is provided on single circuit units and two water regulating valve arrangements are provided on dual circuit units. This option is highly recommended for virtually all NWCR products because of the operating stability it provides. This option is required for applications where inlet condenser water can be below 65°F.
-
Sound attenuation cabinet – The factory installed sound attenuation cabinet covers the entire compressor compartment, significantly reducing compressor and discharge line noise.
-
Sound attenuation blankets – The factory installed sound attenuation blanket kit covers each compressor with a custom fitted blanket, economically reducing the compressor noise. Both the cabinet and blankets may be selected if desired.
-
Ship Loose Options
-
Paddle type flow switch – McDonnell Miller FS8W (or equivalent) paddle-type flow switch shipped loose for field installation. When properly installed and maintained this option satisfies the requirement of a field installed flow proving device.
-
Neoprene isolator kit – Set of 4 Mason Super “W” non-seismic 6” x 6” pads (or equivalent) shipped loose for field installation
-
Spring isolator kit – Set of 4 Mason Type “C” non-seismic spring isolators (or equivalent) shipped loose for field installation
-
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Outline Drawings
NWC15, NWC20, NWC26, NWC30NWC40, NWC52, NWC60, NWC70
Electrical Drawings
NWC15, NWC20, NWC26, NWC30NWC40, NWC52, NWC60, NWC70
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