Owners Manual Ecosaire
®
EN Series Precision Air Conditioner
Ecosaire
®
July 2009
63
Data subject to change without notice.
Add Refrigerant and Adjust TXV Startup
The evaporator superheat must be adjusted at startup. It should be 12°F ± 2°F
(6°C ±1°C) for room temperatures between 68°F (20°C) and 73°F (23°C).
The temperature sensors and pressure gauges were connected under
Startup - Prepare to Adjust TXV.
1. Adjust the set points to cause a compressor to operate for at least 15 minutes.
2. Be sure the refrigerant sight glass shows all liquid. If bubbles are present, additional refrigerant may be needed.
3. Read the temperature of the suction tube by the temperature sensor.
4. Read the suction pressure.
NOTE: The expansion valves cannot be adjusted if the suction saturation
temperature is above 50°F.
Decrease the room temperature and start over.
5. Use the chart below to determine the suction saturation temperature.
6. Subtract the suction saturation temperature from the temperature sensor temperature.
7. Adjust the expansion valve to cause the difference in step 5 to be 12°F ± 2°F (6°C ±1°C).
8. Repeat steps 1 through 7 for a other refrigerant circuit, if any.
9. When the room temperature reaches 68°F (20°C) to 73°F (23°C), run the unit for an additional 15 minutes, then
confirm the superheat.
10. For glycol-cooled units, leave the refrigerant gauges in place for the next page.
ST
ARTUP
Содержание EN Series
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