Advanced Microprocessor Controls Setup
Setup Operation
The Setup Operation permits the review and/or adjustment of the unit configuration. The menu may include:
Cold Start: This feature, also referred to as Positive Start or Winter Start Kit, allows for the low- pressure switch to be ignored for the programmed time during a cold start of the compressors, enabling the unit to run at low suction pressures. Entering a “0” for this time will bypass this feature. A “1”, will bypass the
Restart: This feature allows for the unit to restart automatically after a loss of power. The pro- grammed value is in 0.1 minute (6 seconds) intervals. A programmed value of zero (0) would require the user to manually press the ON/OFF key to start the unit, i.e. no auto restart. The purpose of this feature is to prevent several units from starting at the same time after a loss of power. The message “Restart delay
IR Fill Rate (infrared humidifiers only): An autoflush system automatically controls a water makeup valve to maintain proper level in the infrared humidifier water pan during humidifier operation. If humidification is needed and 15 hours have elapsed since the last time the humidifier was on, the humidifier is held off until the valve completes an initial fill of the humidifier pan. This
During humidifier operation, with the flush rate set at the default of 150%, the valve is opened peri- odically to add water to the pan (about 45 seconds every 7 minutes of humidifier operation for a small pan, or 80 seconds every 10 minutes of operation for a large pan). This adds enough water to the pan to cause about a third of the total water used to be flushed out the overflow standpipe located in the humidifier pan. This action helps to remove solids from the pan. The flush rate is adjustable from 110% to 500%. If the water quality is poor, it may be desirable to increase the water flushing action above the normal 150% rate. Also, if the supply water pressure is low, the flush rate adjustment can be increased so that sufficient water level is maintained during humidification.
Chilled Water/Hot
(3)minutes after the programmed number of hours of
F/C Degrees: The control can be selected to show readings and setpoints in either degrees Fahren- heit (°F) or Celsius (°C).
The following table lists the Setup functions, their factory default values, and the allowable ranges that can be programmed:
Table 2 | Setup functions and factory default values | ||
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Function | Default | Range | |
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Cold Start Time Delay* | 3 | 0 to 3 min (0 = no delay) | |
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Restart Time Delay | 0.1 | 0 to 9.9 min (0 =manual restart) | |
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Infrared Fill Rate | 150 | 110 to 500% | |
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Chilled/Hot Water | 24 | 0 to 99 hrs (also | |
Coil Flush |
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F/C Degrees | F | C or F | |
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*Factory set to 0 for | |||
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