MIL-PRF-24775A(SH)
or more defects preventing or lessening maximum efficiency shall constitute cause for rejection.
4.5 Test sequence. The sequence for testing the fan-coil unit shall be in the order shown in Table III.
4.5.1 Group A tests.
4.5.1.1 Dimensional verification. Fan-coil units shall be measured to verify compliance with 3.11.2
dimensional requirements.
4.5.1.2 Maintainability verification. Information from selected unique test reports shall be reviewed to
determine that the components conform to the requirements specified in 3.8. Service and access requirements shall
be verified by demonstrating that the maintenance functions can be accomplished as specified herein (see 4.6).
4.5.1.3 Safety verification. Examination of the equipment shall be performed to determine that the equipment
and personnel safety requirements of 3.11.13.1 and 3.14.1 have been satisfied.
4.5.1.4 Group A test schedule. The schedule for Group A tests shall be performed in the following order:
a.
Dimensional verification (see 4.5.1.1).
b.
Maintainability verification (see 4.5.1.2).
c.
Safety verification (see 4.5.1.3).
4.5.2 Group B tests.
4.5.2.1 Capacities. Capacity tests shall be conducted on one fan-coil unit of each type and size, with the
highest rated kW heater, to confirm rated capacities at conditions specified in Table I. Capacity tests shall be
conducted under the following conditions with the fan running at high speed:
Entering
External static
water temp.
Unit size
Entering air temp
Gal/Min
pressure
(°F)
(in. w.g.)
80 °F DB/67 °F WB
1
45
1.9
0
80 °F DB/67 °F WB
2
45
3.0
0
80 °F DB/67 °F WB
3
45
4.8
0.25
80 °F DB/67 °F WB
4
45
7.3
0.25
80 °F DB/67 °F WB
5
45
9.5
0.25
80 °F DB/67 °F WB
6
45
13.2
1.0
80 °F DB/67 °F WB
7
45
15.1
1.0
80 °F DB/67 °F WB
8
45
24.5
1.0
The following cooling capacity tests shall be performed when specified (see 6.2) with the unit inclined 15 degrees
toward the motor end:
Entering
External static
water temp.
Unit size
Entering air temp
Gal/Min
pressure
(°F)
(in. w.g.)
80 °F DB/67 °F WB
H-8 and V-8
45
24.5
1.0
Cooling capacity tests shall be conducted in accordance with ASHRAE 33 and ARI 410. The cooling capacities
shall be not less than the rated capacities as specified in Table I. Airflow through the fan-coil unit shall be measured
in accordance with ASHRAE 37 and the airflow at the cabinet outlet shall be within plus or minus 5 percent of the
rated airflow as specified in Table I. The airflow rating shall be determined at the ambient temperature and
corrected for standard air. The water flow through the cooling coil shall be based on 45 °F entering water
temperature and the flow rate shall be 3.6 gal/min/ton of cooling with a water flow equivalent pressure drop across
the coil of not greater than 12 lb/in2. The test unit shall be placed into the Code Tester Air Loop and Chilled Water
Circuit and operated until thermal equilibrium is attained. The test results shall be used to calculate the unit rated
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