NAPPS NWC Water Cooled Chillers
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NAPPS NWC Water Cooled Chillers
The NAPPS NWC Series of Water Cooled Chillers utilizes refrigerant 410A and includes 8 models ranging in capacity from 15 to 70 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 NAPPS NWC product line are the highly efficient scroll compressor, brazed plate evaporator and shell-and tube condenser, and state-of-the-art electronic expansion valve for precise refrigerant distribution.
The integral NAPPS MCS 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 NWC products have cleanable and serviceable shell-and-tube condensers with enhanced copper tubes for high efficiency. This makes the NWC 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 component failure such as a compressor.
NAPPS Scroll Water Cooled Chillers
8 Models - 15 to 70 Tons
NWC Series - Water Cooler Chillers
- NAPPS MCS Digital Controller with BMS Control Interface
- Dual independent refrigerant circuits on 40 through 70 ton models
- Serviceable shell & tube condenser
- Optional factory installed water regulating valve & full sound attenuation enclosure
Superior by Design
State-of-the-Art
The NAPPS NWC Series of Water Cooled Chillers includes 8 models ranging in capacity from 15 to 70 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 NAPPS NWC product line are the highly efficient scroll compressor and brazed plate evaporator, the serviceable shell-and tube condenser and state-of-the-art electronic expansion valve for precise refrigerant distribution.
The integral NAPPS MCS 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.
Efficiency
NAPPS NWC products 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 independent refrigerant circuits to eliminate 100% capacity loss in the event of a component failure such as a compressor.
Construction
All NWC products are assembled on a rugged steel frame with integral lifting provisions and painted with a topcoat of durable urethane enamel.
Vessels
All NWC products have cleanable and serviceable shell-and-tube condensers with enhanced copper tubes for high efficiency. This makes the NWC products suitable for open loop systems and cooling tower applications.
Control
The powerful NAPPS MCS Digital Controllerprovides complete chiller control and standard interface to BACnet, Modbus and Johnson N2 BMS controls.LonTalk interface is optional.
Control Panel
All NWC 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 NWC products are backed by the NAPPS Standard One Year Limited Warranty. Optional 5 year compressor warranty is available. Replacement compressors are available nation-wide.
Options
Factory installed options for NWC products include hot gas bypass, non-fused disconnect, full sound attenuation enclosure, phase monitor, integral digitally controlled condenser water regulating valve, LonTalk and modem communication 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
NAPPS NWC Compressor Chiller
Options
Factory Installed Options
-
No communication – NAPPS MCS Digital Controller configured to operate without Building Management System (BMS) interface. No cost option.
-
Standard communication – NAPPS MCS Digital Controller configured to operate with BACnet IP, Modbus, Johnson N2 and other generic BMS protocols. No cost option.
-
LonTalk communication – Factory installed LonTalk communications board provides LonTalk BMS protocol to NAPPS MCS Digital Controller
-
BACnet MS/TP communication – Factory installed BACnet MS/TP communications board provides BACnet MS/TP BMS protocol to NAPPS MCS Digital Controller.
-
Ice building mode – The NAPPS NWC 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 Napps motor protection device.
-
Non-fused disconnect – Factory installed panel mounted disconnect with through the door operator.
-
Single circuit hot gas bypass – This option provides the factory installed hot gas bypass feature on the single circuit NWC products (NWC15 through NWC30 models) or on only one refrigerant circuit of dual circuit NWC products (NWC40 through NWC70 models). The hot gas bypass feature provides an initial part-load step of capacity for operation at low load conditions, minimizing compressor cycling. Control of the integral hot gas bypass feature is provided by the NAPPS MCS Digital Controller.
-
Dual circuit hot gas bypass – This option provides the factory installed hot gas bypass feature on both refrigerant circuits of a dual circuit NWC products (NWC40 through NWC70 models). Control of the integral hot gas bypass feature is provided by the NAPPS MCS Digital Controller. Select this option for special conditions in which limited suction pressure control is needed.
-
Integral water regulating valve(s) – The factory installed water regulating valve(s) option provides a fully integrated discharge pressure control feature to the NAPPS unit. Control of the integral proportional water regulating valve is provided by the NAPPS MCS 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 NAPPS NWC products because of the operating stability it provides. This option is required for applications where inlet condenser water can be below 75°F.
-
Sound attenuation cabinet – The factory installed sound attenuation cabinet covers the entire compressor compartment, significantly reducing compressor and discharge line noise.
-
Extended compressor warranty – Compressor only, extended warranty for the 2nd through 5th year available only through Napps.
Ship Loose Options
-
Paddle type flow switch – McDonnell Miller FS354 (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.
-
Modem – Factory installed modem provides another remote communication option. NAPPS NWC products have, as standard, Ethernet communication capability. Modem Kit can also be shipped loose as an option after the unit is commissioned if needed.
-
Neoprene isolator kit – Set of 4 Mason Super “W” non-seismic 6” x 6” pads shipped loose for field installation
-
Spring isolator kit – Set of 4 Mason Type “C” non-seismic spring isolators shipped loose for field installation
-
Seismic isolator kit – Set of 4 Mason Type “SLRS” seismic spring isolators engineered for the chiller, complete with mounting bolts, instructions, and if requested a certified and PE stamped engineering selection
Run a Standard NWC Selection
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The required Run Sequence # is included in the acknowledgement of the Special Selection request and in the notification that the run results have been posted.
Contact Napps if you need assistance in viewing the results of your Special Selection request.
Submittal and Quotation Request
Once you are satisfied with the selection you may request a submittal package or a quotation by going to the Submittal Request tab or the Quotation Request tab. To request a Submittal Package, you will need the Run Sequence number. Submittal packages and quotations will be provided to you by the Trane Sales Engineer that you selected in your profile
Outline Drawings
NWC15, NWC20, NWC26, NWC30NWC40, NWC52, NWC60, NWC70
Electrical Drawings
NWC15, NWC20, NWC26, NWC30NWC40, NWC52, NWC60, NWC70
Request a DWG File
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