PTEC-M-1A
28
WARNING!
To avoid possible death or personal
injury due to electrical shock, always
disconnect electrical power to the
unit before beginning any servicing
or disassembly. Since this unit is
electrically polarized, replace all
wires removed on the terminals
from which removed. All ground
wires must be reinstalled.
Refrigeration
System
Efficient operation is dependent on a
balanced system. One of the most
common reasons for inefficiency is
the users failure to adequately clean
the evaporator and condenser
thereby creating reduced air
movement.
Cooling Performance Test
Thermometers
The following precautions are
necessary in observing the
thermometer readings in the cooling
performance test.
1. Use two accurately calibrated
refrigeration type thermometers
or a thermocouple potentiometer.
2. Thermometers are affected by
body heat or changes in air flow.
Therefore, the thermometers
must be secured in proper
locations with masking tape, wire
or other applicable retainers.
3. Readings should be observed
without touching or moving the
thermometers.
Sling Psychrometer
The sling psychrometer is used to
obtain the wet bulb temperature in
determining the percent relative
humidity.
To obtain the wet bulb operate the
sling psychrometer as follows:
• Saturate the wick (only once during
procedure of obtaining wet bulb
readings) with clean water slightly
below room temperature.
•`Psychrometer reading should be
acquired five to six feet in front of
the unit and approximately four
feet off the floor.
Note:
Direct discharge airflow away
from the sling psychrometer.
The cooling performance test should
not be employed when outside
temperatures are 20° below that of
the room. Best results are obtained
when the test is conducted under
peak load conditions.
The air conditioner must operate at
least 20 minutes on the High Cool
position before testing.
Содержание PTEC-070
Страница 22: ...PTEC M 1A 22 Refrigeration System PTEC Refrigeration System...
Страница 54: ...PTEC M 1A 54 Schematic Diagrams PTEC and PTHC Condensate Pump One Stage Heat...
Страница 55: ...55 PTEC M 1A Schematic Diagrams PTEC and PTHC Condensate Pump Two Stage Heat...
Страница 56: ...PTEC M 1A 56 Schematic Diagrams PTEC and PTHC Power Vent One Stage Heat...
Страница 57: ...57 PTEC M 1A Schematic Diagrams PTEC and PTHC Power Vent Two Stage Heat...
Страница 58: ...PTEC M 1A 58 PTEC and PTHC Power Door One Stage Heat Schematic Diagrams...
Страница 59: ...59 PTEC M 1A Schematic Diagrams PTEC and PTHC Power Door Two Stage Heat...
Страница 60: ...PTEC M 1A 60 Schematic Diagrams PTEC and PTHC Condensate Pump with Power Vent One Stage Heat...
Страница 61: ...61 PTEC M 1A Schematic Diagrams PTEC and PTHC Condensate Pump with Power Vent Two Stage Heat...
Страница 62: ...PTEC M 1A 62 Schematic Diagrams Hydronic...
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