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MIL-PRF-23798 Air Conditioner, Fan-Coil AssemblyThis specification covers prefabricated fan-coil assemblies for use in conjunction with a chilled water system for air conditioning spaces onboard Naval surface ships.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13


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MIL-PRF-23798D(SH)
TABLE VI. Size 25 performance (3.6 gal/min/ton).
SCFM
Entering
Entering
Chilled
3080 3/
air DB
air WB
water
2300
3800
(°F)
(°F)
(°F)
MBH 1/
WB
MBH
WB
MBH
WB
58.0 2/
60.0 2/
75.8 2/
86.1 2/
48.5
48.5
49.5
2/
70
62.0
81.5
49.5
103.0
50.0
119.4
51.0
64.0
96.5
49.5
121.6
50.5
142.3
51.0
66.0 2/
111.4 2/
141.5 2/
165.0 2/
49.5
50.5
51.5
62.0 2/
87.6 2/
112.1 2/
126.5 2/
48.5
49.0
50.0
2/ 3/
67.0 3/
151.3 3/
80
119.6
49.5
50.5
178.4
51.5
45
70.0
144.3
49.5
183.2
51.0
216.3
52.0
72.5 2/
166.5 2/
210.9 2/
248.9 2/
50.0
51.5
52.5
68.5 2/
138.9 2/
170.7 2/
206.5 2/
48.5
50.0
50.5
2/
76.0
199.4
50.0
252.6
51.5
300.2
53.0
100
81.5
255.7
50.5
327.4
52.5
388.8
54.0
83.5 2/
277.8 2/
354.8 2/
420.3 2/
51.0
53.0
54.5
Notes:
1/
Thousands, Btu/h
2/
Test points
3/
3080 Nominal rating point
3.13 Environmental conditions.
3.13.1 Shock. Unless otherwise specified (see 6.2), fan-coil assemblies shall pass the high impact shock tests
specified in 4.6.1. Internal shock and vibration mounts shall be provided in conjunction with the mounting
arrangement for the fan and motor assembly. The mounts shall be the captive type.
3.13.2 Vibration. Unless otherwise specified (see 6.2), fan-coil assemblies shall withstand without damage or
malfunction environmental vibrations as specified in 4.6.2 in accordance with MIL-STD-167-1 for type I
"environmental vibration" for frequencies up to and including 33 Hz.
3.13.3 Airborne noise. The total sound power level for a type II or a type III fan-coil assembly shall not exceed
the levels specified in Table VII when tested in accordance with procedures defined in 4.6.4.
3.13.4 Replenishment air. Replenishment air introduced into unit is sea air at 40 °F to 95 °F.
3.13.5 Ambient air. Perform in accordance with the requirements herein under ambient temperatures between
40 °F and 95 °F.
TABLE VII. Total sound power level dB referenced to 10-12 watts.
Octave band center frequency (Hz)
Size
63
125
250
500
1000
2000
4000
8000
21
77
74
71
68
65
62
59
56
22
80
77
74
71
68
65
62
59
23
83
80
78
74
71
68
65
62
24
86
83
80
77
74
71
68
65
25
89
86
83
80
77
74
71
68
12



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