MIL-PRF-24775A(SH)
cooling capacity in accordance with ASHRAE 33 and ARI 410.
4.5.2.2 Condensation. Fan-coil units subjected to capacity tests of 4.5.2.1 shall be fitted with uninsulated plexi-
glass access panels for a special test at 95 °F EDB and 82 °F EWB to determine through observation if condensation
forms on components downstream of the cooling coil and outside of drain pan drip area.
4.5.2.3 Performance. Government approved performance tests shall be conducted as specified in 4.5.2.4
through 4.5.2.10 on 1 size H5 and 1 size H8 fan-coil unit, with the highest rated kW heater, to determine basic heat
transfer parameters for conformance to nominal capacity ranges at conditions as specified in Table I, and for
development of selection information. The entering conditions shall be at enough points (including those specified
in Table I for nominal capacity ranges) to enable cooling capacity tables and airflow performance curves to be
produced as selection information. Cooling capacity tests and airflow measurements shall be conducted in
accordance with ASHRAE 33, ARI 410, and ASHRAE 51 respectively, and with the unit inclined 15 degrees in any
direction from the normal horizontal position.
4.5.2.4 Fan performance. To determine the fan performance of fan-coil units under various external static
pressures at ambient temperatures, airflow test shall be conducted at both high and low fan speeds under the
following conditions:
External static pressure
Unit size
Fan speed
(in. w.g.)
High
0
1
Low
0
High
0
2
Low
0
High
0.10, .20, .25
3
Low
.05, .10, .15
High
.10, .20, .25
4
Low
.05, .10, .15
High
.10, .20, .25
5
Low
.05, .10, .15
High
.25, .50, .75, 1.0
6
Low
.10, .25, .50
High
.25, .50, .75, 1.0
7
Low
.10, .25, .50
High
.25, .50, .75, 1.0
8
Low
.10, .25, .50
The tests shall be conducted in accordance with ASHRAE 51. The unit shall be placed in the Code Tester Air Loop,
as shown in ASHRAE 51, and equilibrium conditions established before each reading. Test information shall be
taken after setting each external static pressure.
4.5.2.5 Motor tests. Motor tests shall be conducted in accordance with IEEE STD 45.
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