SWU Water Cooled Condensing Units
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SWU Water Cooled Condensing Units
NAPPS SWU Series Water Cooled CondensingUnits include 10 models ranging in capacity from 10 to 60 tons. Each model is designed for quiet, high efficiency operation and built to withstand demanding continuous duty cycles. At the heart of the NAPPS SWU product line is the Trane 3-D® Scroll Compressor which is recognized worldwide as state-of-the-art in compressor technology and a high efficiency cleanableand serviceableshell-and-tube condenser.
NAPPS SWU products are shipped with a dry nitrogen holding charge. Compressors are shipped with POE oil for 407C refrigerant applications.
NAPPS Scroll Water Cooled Condensing Units 
10 Models - 10 to 60 Tons
SWU Series – Water Cooled Condensing Units
- Advanced scroll compressor technology for higher efficiency and reliability
- Capacity controlled by cycling compressors and optional factory installed hot gas bypass
- ASME serviceable shell & tube condensers
- Factory installed and ship-loose options
- Optional 5 year extended compressor warranty
- Product safety tested, ETL listed & certified for US & Canada
Superior by Design
NAPPS SWU Dry Water Cooled Condensing Units are shipped with POE oil for 407C refrigerant applications.
State-of-the-Art
NAPPS SWU Series of Water Cooled Condensing Units include 10 models ranging in capacity from 10 to 60 tons. Each model is designed for quiet, high efficiency operation and built to withstand demanding continuous duty cycles. At the heart of the NAPPS SWU product line is the Trane 3-D® Scroll Compressor which is recognized worldwide as state-of-the-art in compressor technology.
Efficiency
The NAPPS SWU product offers full and part load efficiencies that are unmatched when compared to products utilizing reciprocating compressors. Still higher part-load efficiencies are realized as compressors are cycled for capacity control in 20 through 60 ton models.
Reliability
Since its introduction, Trane’s 3-D® scroll compressor has proven to be one of most reliable compressors available. While high reliability is inherent with the 3-D® scroll technology, the life of the compressor is also extended by maintaining close machine tolerances, rugged construction, aggressive safety control strategy and special design features such as the particle separator and the high volume oil sump.
Construction
All SWU products are assembled on a rugged 12 gauge galvanized steel base and painted with a topcoat of durable urethane enamel.
Condenser
All SWU products utilize cleanable and serviceable shell-and-tube condensers with enhanced copper tubes for high efficiency. Condensers are ASME code stamped and fitted with safety relief valve and ball type liquid line shut off valve.
Control
Terminal points are provided on all SWU products for connection of customer supplied temperature control. Multiple compressor units are configured to control capacity by cycling individual compressors, while single compressor units are configured for on/off operation. The factory installed hot gas bypass option can be utilized on single compressor units (SWU-10 & 15) where reduced capacity is desired.
Control Panel
Control panels on all SWU products are complete with single point power connection terminal block, contactor and overload relay for each compressor, fused control power transformer, anti-recycle timer, reset relay, low and high pressure control, motor winding temperature protection, pump-out circuitry, summary fault terminal points and terminal points for other control options.
Warranty
All SWU products are backed by the NAPPS Standard One Year Limited Warranty with extended 5 year compressor warranty available as an option. Replacement compressors are available nationwide.
Options
Factory installed options for SWU products include hot gas bypass, gauge panel with individual gauge isolation valves, power supply monitor, non-fused through-the-door panel mounted disconnect and cycle counter/hour meter. Ship loose options include suction line ball valve, water regulating valve and unit vibration isolator kit.
Dimensions and Specifications
|
NAPPS Model # |
Dimensions |
Operating Weight |
* Connection Sizes |
Capacity Steps (%) |
MCA @ 60 Hz, 3f |
|||||
|
L |
W |
H |
Liquid |
Suction |
Water |
208/230 Volt |
460 Volt |
|||
|
SWU-10 |
52” |
28 ½” |
49 ½” |
620 lb. |
⅞” |
1⅜” |
1 ¼” |
100 |
53 |
23 |
|
SWU-15 |
52” |
28 ½” |
49 ½” |
697 lb. |
⅞” |
1 ⅝” |
1 ¼” |
100 |
78 |
35 |
|
SWU-20 |
64” |
28 ½” |
49 ½” |
875 lb. |
1⅛” |
1 ⅝” |
2” |
100/50 |
95 |
42 |
|
SWU-25 |
64” |
28 ½” |
49 ½” |
952 lb. |
1⅛” |
2⅛” |
2” |
100/40 |
120 |
53 |
|
SWU-30 |
66” |
28 ½” |
49 ½” |
1124 lb. |
1⅛” |
2⅛” |
2 ½” |
100/50 |
140 |
63 |
|
SWU-35 |
66” |
33 ½” |
61” |
1327 lb. |
1⅜” |
2⅛” |
2 ½” |
100/57/43 |
163 |
72 |
|
SWU-40 |
78” |
33 ½” |
61” |
1434 lb. |
1⅜” |
2⅝” |
2 ½” |
100/63/37 |
183 |
81 |
|
SWU-45 |
69” |
33 ½” |
61” |
1621 lb. |
1⅜” |
2⅝” |
3” |
100/67/33 |
203 |
90 |
|
SWU-50 |
84” |
33 ½” |
61” |
1849 lb. |
1⅜” |
2⅝” |
3” |
100/70/40/30 |
225 |
99 |
|
SWU-60 |
84” |
33 ½” |
61” |
1983 lb. |
1⅜” |
3⅛” |
3” |
100/75/50/25 |
265 |
118 |
* All refrigerant connections are sweat, all water connections are FPT
Full Load Performance
|
Model # (number of compressors) |
SST |
Entering Condenser Water Temperature |
|||||||||||
|
75° F |
85° F |
95° F |
|||||||||||
|
Tons |
EER |
GPM |
DP |
Tons |
EER |
GPM |
DP |
Tons |
EER |
GPM |
DP |
||
|
SWU-10 (1 compressor) |
30° F |
9.5 |
15.9 |
27.7 |
10.8 |
9.0 |
13.8 |
27.0 |
9.8 |
8.6 |
11.9 |
26.7 |
9.6 |
|
40° F |
11.5 |
19.1 |
32.5 |
13.9 |
11.0 |
16.4 |
31.8 |
13.3 |
10.5 |
14.1 |
31.3 |
12.8 |
|
|
50° F |
13.7 |
22.3 |
38.0 |
18.6 |
13.0 |
19.2 |
36.9 |
17.1 |
12.6 |
16.3 |
36.4 |
16.7 |
|
|
SWU-15 (1 compressor) |
30° F |
14.0 |
15.6 |
41.0 |
15.6 |
13.4 |
13.4 |
40.5 |
14.8 |
12.6 |
11.3 |
39.2 |
13.9 |
|
40° F |
17.0 |
18.6 |
48.2 |
20.8 |
16.4 |
16.2 |
47.6 |
19.8 |
15.4 |
13.5 |
46.3 |
18.8 |
|
|
50° F |
20.4 |
21.9 |
56.6 |
28.0 |
19.4 |
18.7 |
55.1 |
25.9 |
18.4 |
15.9 |
53.8 |
24.6 |
|
|
SWU-20 (2 compressors) |
30° F |
18.3 |
14.9 |
54.1 |
6.0 |
17.5 |
12.7 |
53.2 |
5.6 |
16.5 |
10.7 |
52.1 |
5.4 |
|
40° F |
22.3 |
17.7 |
63.8 |
8.0 |
21.3 |
15.1 |
62.6 |
7.7 |
20.1 |
12.8 |
61.1 |
7.3 |
|
|
50° F |
26.5 |
20.5 |
74.2 |
10.6 |
25.3 |
17.5 |
72.6 |
10.1 |
24.0 |
14.8 |
71.0 |
9.6 |
|
|
SWU-25 (2 compressors) |
30° F |
22.8 |
14.5 |
67.5 |
7.2 |
21.8 |
12.6 |
66.4 |
6.9 |
20.4 |
10.6 |
64.6 |
6.5 |
|
40° F |
27.5 |
17.3 |
78.9 |
9.5 |
26.2 |
14.8 |
77.4 |
8.9 |
24.8 |
12.4 |
75.9 |
8.6 |
|
|
50° F |
32.9 |
20.0 |
92.3 |
12.6 |
31.2 |
17.0 |
89.9 |
11.8 |
29.7 |
14.7 |
87.9 |
11.3 |
|
|
SWU-30 (2 compressors) |
30° F |
27.5 |
14.9 |
81.1 |
5.0 |
26.0 |
12.7 |
79.1 |
4.8 |
24.5 |
10.7 |
77.5 |
4.6 |
|
40° F |
33.2 |
17.7 |
94.9 |
6.6 |
31.6 |
15.1 |
92.9 |
6.3 |
29.9 |
12.8 |
90.9 |
6.1 |
|
|
50° F |
39.6 |
20.6 |
110.9 |
9.1 |
38.1 |
17.8 |
108.8 |
8.4 |
36.0 |
15.1 |
105.9 |
7.9 |
|
|
SWU-35 (3 compressors) |
30° F |
31.6 |
14.6 |
93.5 |
6.4 |
29.9 |
12.4 |
91.5 |
6.2 |
28.2 |
10.5 |
89.9 |
5.9 |
|
40° F |
38.1 |
17.0 |
109.7 |
8.7 |
36.4 |
14.6 |
107.8 |
8.2 |
34.3 |
12.5 |
104.8 |
7.8 |
|
|
50° F |
45.4 |
20.0 |
127.6 |
11.6 |
43.4 |
17.1 |
124.8 |
10.8 |
41.3 |
14.5 |
122.5 |
10.4 |
|
|
SWU-40 (3 compressors) |
30° F |
36.0 |
14.8 |
106.4 |
9.4 |
34.3 |
12.5 |
104.8 |
8.9 |
32.4 |
10.6 |
102.6 |
8.6 |
|
40° F |
43.7 |
17.2 |
125.8 |
12.7 |
41.7 |
14.9 |
122.9 |
11.8 |
39.6 |
12.6 |
120.8 |
11.4 |
|
|
50° F |
52.3 |
20.3 |
146.6 |
16.5 |
49.4 |
17.3 |
142.1 |
15.2 |
47.0 |
14.7 |
139.0 |
14.6 |
|
|
SWU-45 (3 compressors) |
30° F |
40.5 |
14.7 |
119.8 |
5.1 |
38.4 |
12.5 |
117.4 |
4.7 |
36.4 |
10.6 |
115.6 |
4.6 |
|
40° F |
49.0 |
17.2 |
141.1 |
6.8 |
46.6 |
14.9 |
137.5 |
6.3 |
44.1 |
12.6 |
134.6 |
6.0 |
|
|
50° F |
58.5 |
20.2 |
164.0 |
8.9 |
55.6 |
17.3 |
159.8 |
8.2 |
53.2 |
14.9 |
156.9 |
7.9 |
|
|
SWU-50 (4 compressors) |
30° F |
45.4 |
14.9 |
133.9 |
6.9 |
43.4 |
12.8 |
131.8 |
6.7 |
40.9 |
10.8 |
129.1 |
6.4 |
|
40° F |
55.2 |
17.8 |
157.9 |
9.2 |
52.3 |
15.2 |
153.6 |
8.5 |
49.8 |
12.9 |
151.2 |
8.3 |
|
|
50° F |
65.4 |
20.6 |
183.0 |
12.1 |
63.0 |
17.9 |
179.9 |
11.3 |
59.6 |
15.2 |
175.2 |
10.7 |
|
|
SWU-60 (4 compressors) |
30° F |
53.9 |
14.7 |
159.6 |
9.4 |
51.1 |
12.5 |
156.1 |
8.8 |
48.3 |
10.6 |
153.2 |
8.5 |
|
40° F |
65.0 |
17.2 |
187.0 |
12.4 |
62.1 |
14.9 |
183.2 |
11.9 |
58.8 |
12.6 |
179.4 |
11.4 |
|
|
50° F |
78.1 |
20.2 |
219.1 |
16.7 |
74.3 |
17.3 |
213.7 |
15.6 |
70.3 |
14.6 |
208.3 |
14.8 |
|
All R-407C data above is estimated from ratings based on 60 Hz, R-22 refrigerant, 15°F superheat, 15°F subcooling and 10°F water temperature rise per ARI standard 365-87
DP = Water-side pressure drop in feet of water
NAPPS SWU Water Cooled Condensing Unit
Options
Factory Installed Options
- Power monitor – Factory installed power monitor prevents unit operation if phase loss, low voltage or phase reversal is detected.
- Non-fused disconnect – Factory installed panel mounted disconnect with through the door operator.
- Cycle counter and hour meter – This factory installed option individually monitors and records the number of cycles and run time in hours for each individual compressor.
- Gauge panel w/ isolating valves – The factory installed gauge panel is mounted on the side of the control panel and includes suction and discharge combination gauges with individual isolation valves to facilitate replacement if needed.
- Hot gas bypass – The factory installed hot gas bypass regulating valve is piped in series with a solenoid valve and is active any time a compressor is running. The line leaving the hot gas bypass valve terminates at the unit perimeter. The hot gas bypass valve is to be field set to meter hot gas directly into the line downstream of the expansion valve as the saturated suction pressure falls approaching 32 °F.
- Sound attenuation cabinet – The factory installed sound attenuation cabinetcovers 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
- Suction line ball valve – Suction line ball valves are available as a ship loose option for each SWU model.
- Water regulating valve – Direct and/or pilot operated water regulating valves are available for all SWU model. These valves have to be selected based on individual operating conditions and field adjusted once installed of proper discharge pressure control. Water regulating valves are required for applications where condenser water inlet temperature is less than 75 °F.
- Non-seismic neoprene isolator kit – Set of 4 Mason type ND neoprene isolators for non-seismic applications
- Non-seismic spring isolator kit – Set of 4 Mason Type C 1.0” spring isolators for non-seismic applications
- Seismic neoprene isolator kit – Set of 4 Mason type BR neoprene isolators for seismic applications
- Seismic spring isolator kit – Set of 4 Mason Type SSLFH 1.0” spring isolators for seismic applications
Run a Standard SWU Selection
These selections are taken from the Standard Performance Rating Table in real time
Performance from "Standard Performance Rating Table" based on
15 °F Liquid Subcooling
15 °F Superheat
10 °F Condenser water temperature rise
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
SWU10, SWU15SWU20, SWU25, SWU30
SWU35, SWU40, SWU45
SWU50, SWU60
Electrical Drawings
SWU10, SWU15SWU20, SWU25, SWU30
SWU35, SWU40, SWU45
SWU50, SWU60
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