Table of Contents
Advertisement
Performance Tests
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit and
discharge capacitor through a 10,000 ohm resistor before attempting to service, unless test procedures require
power to be connected. Ensure all ground wires are connected before certifying unit as repaired and/or
operational.
Performance Tests
!
CAUTION
To avoid damage to air conditioner, do not run
performance tests when cover is off unit or unit is
not installed in mounting sleeve. Operation with
cover/mounting sleeve removed changes design
specifications for air movement in the unit, resulting
in overheating of fan motor and causing refrigeration
system to become unbalanced.
Performance tests provide reasonable assurance a unit
is operating correctly and within specifications.
Performance tests must be successfully completed to
provide this assurance. Perform tests after service, to
verify a unit is operating within specifications. Tests can
also be run as a diagnostic aid before service (retest unit
after servicing).
NOTE: Performance tests should not be run on installed
units when outside temperature is more than
20°F below room temperature at testing location.
Test Set up
Results obtained from cooling performance test are
dependent upon the thermometers used, how they are
handled, and where they are placed. To obtain accurate,
reliable test results:
· Use two accurately calibrated refrigeration type
thermometers, or a thermocouple potentiometer. A
sling psychrometer is also required for this test.
· See Thermometer Testing Location diagram. Secure
thermometers to unit under test at locations 1 and 2
using masking tape, wire, or other suitable retainers.
· Ensure temperature scale on thermometers are
readable without having to touch or move
thermometers to do so.
RS4100004 Rev. 0
!
WARNING
2.
1.
Taking Sling Psychrometer Readings
The sling psychrometer obtains wet bulb temperatures
used to determine percent relative humidity.
To obtain wet and dry bulb temperature readings with
sling psychrometer:
1. Apply power to unit under test. Place FAN CONTROL
in high cooling position, TEMPERATURE CONTROL
to coolest setting, and VENT CONTROL to closed
position. Run unit under test at least 20 minutes
before any readings are taken.
2. Saturate wick on sling psychrometer with clean water,
slightly below room temperature (saturate wick only
once during procedure).
NOTE: Ensure cold air blowing from unit under test is
not blowing on sling psychrometer during either
reading.
3. Take psychrometer reading approximately 5 feet in
front of unit, approximately 4 feet above floor. Record
results.
4. Remove wick from sling psychrometer. Take
psychrometer reading at same location as reading
taken in step 3. Record results (this is the sling
psychrometer dry bulb temperature).
30
Placement:
Down from top: 1 inch
In from side: 2½ inchs
Placement: Center of return air vent
Thermometer Testing Locations
Advertisement
Table of Contents
