YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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SECTION 8 - MICROPANEL Setpoints Key Operation Cooling setpoints and ranges may be programmed by pressing the SETPOINTS key. The first setpoint entry screen will be displayed as shown below. The first line of the display will show the chiller default (DEF), minimum acceptable value (LO) and maximum acceptable value (HI). The second line shows the actual programmed value. Table 10 also shows the allowable ranges for the cooling setpoints and Control Ranges. Note that the Imperial units are exact values while the Metric units are only approximate. SETPOINTS ◄DEF XXXXX LO XXXXX HI XXXXX LOCAL COOLING SETPOINT = XXX.X °F Pressing the SETPOINTS key a second time or the ▼ (ARROW) key will display the leaving chilled liquid Control Range, default, and low/high limits. SETPOINTS ◄DEF XXXXX LO XXXXX HI XXXXX LOCAL CONTROL RANGE = +/- X.X °F Pressing the SETPOINTS key or the ▼ (ARROW) key a third time will display the remote setpoint and cooling range. This display automatically updates about 112 SETPOINTS KEY SETPOINTS KEY LD10605 FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 every 2 seconds. This remote setpoint message is show below: SETPOINTS REMOTE SETPOINT = XXX.X °F REMOTE CONTROL RANGE = +/- X.X °F If there is no remote setpoint being utilized, the remote setpoint value will be displayed as XXXXXX and the remote Control Range will display XXX. Pressing the SETPOINTS key or the Arrow key a fourth time will bring up a screen that allows the Maximum Remote Temperature Reset to be programmed. This message is show below: SETPOINTS ◄DEF XXXXX LO XXXXX HI XXXXX MAXIMUM REMOTE TEMP RESET = XXX.X °F The values displayed under each of the key presses may be changed by keying in new values and pressing the � (ENTER) key to store the new value into memory. Where more than one value may be keyed in on a display, a portion of the data that does not need updating may be skipped by pressing the � (ENTER) key. The � (ENTER) key must also be pressed after the last value in the display to store the data into memory. JOHNSON CONTROLS
FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 The ▲ (ARROW) key allows scrolling back through the setpoints displays. The minimum, maximum, and default values allowed under the SETPOINTS key are provided in the following table. TABLE 10 - SETPOINT LIMITS SECTION 8 - MICROPANEL PROGRAM VALUE MODE LOW LIMIT HIGH LIMIT DEFAULT Leaving Chilled <strong>Liquid</strong> Setpoint Water Cooling Glycol Cooling Leaving Chilled <strong>Liquid</strong> Control Range - Max. Remote Temperature Reset - 40.0°F 60.0°F 44.0°F 4.4°C 15.6°C 6.7°C 15.0°F 70.0°F 44.0°F -9.4°C 15.6°C 6.7°C 1.5°F 2.5°F 2.0°F 0.8°C 1.4°C 1.1°C 2°F 40°F 20°F 1°C 22°C 11°C JOHNSON CONTROLS 113 8
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AIR-COOLED SCREW LIQUID CHILLERS IN
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YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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