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Precision Cooling
For Business-Critical Continuity™
™
Liebert Deluxe System/3
Operation and Maintenance Manual
50 and 60 Hz, 6-30 Ton DX Systems (DH/DE/VH/VE); 12-60 Ton CW Systems (FH/UH)
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TABLE OF CONTENTS 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1 System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1.1 Compressorized Two-Step Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1.2 Compressorized Four-Step Systems . . . . . . . . . . . . . . . . .
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4.4 Main Menu (AG)—View/Set Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.4.1 Active Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.4.2 Alarm History Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.4.3 Setup Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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5.0 RESPONSE BY CONTROL TYPE—ADVANCED MICROPROCESSOR CONTROLS . . . . . . . . . . .33 5.1 Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.1.1 Cooling/Heating Required, in Percent (%) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.1.2 Response to Control Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.1.
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7.0 COMPONENT OPERATION AND MAINTENANCE, CHECKS AND ADJUSTMENTS. . . . . . . . . . . .48 7.1 System Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 7.1.1 Environmental Control Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 7.1.2 Electric Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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FIGURES Figure 1 Advanced microprocessor control panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 2 Advanced microprocessor (AM) control menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3 Advanced microprocessor with graphics control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 4 Advanced microprocessor with graphics (AG) control menu . . . . . . . .
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vi
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Introduction 1.0 INTRODUCTION 1.1 System Description Liebert Deluxe environmental control systems are available in several configurations. Each configu- ration can operate with either Advanced Microprocessor Controls (AM), or Advanced Microprocessor Controls with Graphics (AG). A brief description of each, including operational differences, are listed below. Check model numbers to see what is supplied with your unit. 1.1.1 Compressorized Two-Step Systems These systems may be air, water, or gly
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Introduction 1.1.3 Chilled Water Systems These systems utilize a central chiller and control cooling by modulating a control valve in the chilled water line. Cooling Modulating output water valve Heating Three stages of electric reheat standard; steam/hot water optional Humidification Infrared standard, steam grid and steam generating optional Dehumidification Chilled water valve opens proportionally in response to room needs ™ 1.1.4 GLYCOOL (Chilled Glycol Cooling) Systems ™ GLYCOOL systems h
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Initial Start-Up Procedure 2.0 INITIAL START-UP PROCEDURE Before beginning start-up, make certain that unit was installed according to the instructions in the Installation Manual. All exterior panels must be in place. Locate the Start-Up form supplied with your unit documents. Complete the form during your start-up and mail it to Liebert when start-up is completed. Contact your Liebert supplier if you have any ques- tions or problems during your unit installation, start-up, or operation. WARNI
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Advanced Microprocessor Controls Setup 3.0 ADVANCED MICROPROCESSOR CONTROLS SETUP The Advanced Microprocessor (AM) Control for your Liebert Deluxe unit features an easy to use menu driven LCD display. The menus, control features, and circuit board details are described in this section. For more control details refer to 5.0 - Response by Control Type—Advanced Micropro- cessor Controls, and for more alarm information refer to 6.0 - Alarm Descriptions and Solu- tions. 3.1 Basics Control keys incl
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Advanced Microprocessor Controls Setup Figure 2 Advanced microprocessor (AM) control menu Main Menu Normal 72° 50% Reheat Status/Alarm Data Display Cooling Setpoints/Setup Dehumidifying Date and Time No Alarms Present Status Display Status Alarm Data Setpoints/Setup Date and Time Status Display Active Alarms View Setpoints 15-APR-2001 09:30:00 75°F 59% RH Operating Status Setup System Cooling Alarm History Log Run Diagnostics ENTER to change Dehumidifying Run Hours Log Change Passwords ESCap
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Advanced Microprocessor Controls Setup 3.3 Main Menu (AM)—Status/Alarm Data Selecting STATUS/ALARM DATA from the Main Menu will display the following selections: ACTIVE ALARMS OPERATING STATUS ALARM HISTORY LOG RUN HOURS LOG ANALOG SENSORS 3.3.1 Active Alarms This screen, a submenu of Status/Alarm Data, displays any active alarm. The alarms are numbered, #1 being the most recent. If there are no active alarms, then “NO ALARMS PRESENT” will be dis- played. 3.3.2 Operating Status The Operating St
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Advanced Microprocessor Controls Setup 3.3.5 Analog Sensors The four (4) analog sensor inputs can be monitored from this submenu of Status/Alarm Data. The inputs are filtered and displayed along with the text label assigned during setup. See Analog Setup on page 12. 3.4 Main Menu (AM)—Setpoints/Setup Selecting Setpoints/Setup from the Main Menu will display the following selections: VIEW SETPOINTS SETUP SYSTEM RUN DIAGNOSTICS CHANGE PASSWORDS NOTE Setpoints and system setup parameters are kept
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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 low-pressur
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Advanced Microprocessor Controls Setup Select Options The following table lists choices on the Select Options menu. These should match the options installed with your unit and should not need to change during normal operation. Table 3 Select options Option Selection Heating Yes or No Humidifier Yes or No Dehumidifier Yes or No Humidifier Pan Small or Large Hot Gas Reheat Yes or No Heat Stages* 2 or 3 Dehumidification Stages 1 or 2 *If heat stage is set to 2 on a chilled water unit, the reheat
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Advanced Microprocessor Controls Setup Dehumidification with Normal or Delayed Reheat: Dehumidification with normal reheat allows for operating BOTH compressors and reheats simultaneously. It is very important that electrical ser- vice to the unit be sized and wired for this option if selected. CAUTION ! If the electrical service to the unit is not properly sized for this option, it could trip the building circuit breakers (or fuses) or, in extreme cases, damage the building wiring. With delay
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Advanced Microprocessor Controls Setup Table 5 Alarm default time delay Alarm Default Delay (seconds) Humidifier Problem 2 High Head Pressure 1 2 High Head Pressure 2 2 Change Filter 2 Loss of Air Flow 3 Custom Alarm #1 0 Custom Alarm #2 0 Custom Alarm #3 0 Custom Alarm #4 6 High Temperature 30 Low Temperature 30 High Humidity 30 Low Humidity 30 Low Suction Pressure 1, 2 0 Short Cycle 1, 2 0 Compressor #1 Overload 2 Compressor #2 Overload 2 Main Fan Overload 5 Loss of Power 0 Enable Alarms: Each
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Advanced Microprocessor Controls Setup Standard Alarm Messages • Water under floor • Smoke detected • Standby GC pump on • Loss of water flow • Standby unit on For more information concerning alarms, see 6.0 - Alarm Descriptions and Solutions. Humidity Control Method The user may select between relative (direct) and absolute (predictive) humidity control. If relative is selected, the RH control is taken directly from the RH sensor. If absolute is selected, the RH control is automatically adjus
