Liebert 8 Tons - Manuals

iv FIGURES Figure 1 System configurations—air cooled systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2 System Configurations—water/glycol systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 3 Syste...

v M ODEL N UMBER N OMENCLATURE Evaporators and Chilled-Water Units MMD96E-AHEL0 (example) Indoor Condensing Units MCD96ALA00 (example) MM Mini-Mate2 MC Mini-Mate2 Indoor Condensing Unit D 0 = No Disconnect D 0 = No Disconnect D = Disconnect D= Disconnect 96E- 96E- = 8-ton Evaporator, 60 Hz 96A 96A =...

Product Features 1 1.0 P RODUCT F EATURES 1.1 Standard Product Features The Mini-Mate2 is a temperature/humidity control system designed to be installed above a ceiling grid system. The unit is available as a split system evaporator to be matched with an Indoor Centrif- ugal Fan Condensing Unit, Out...

Product Features 2 1.2 Optional Equipment 1.2.1 Canister Humidifier The optional, factory-installed steam generating humidifier adds pure water vapor to the room air to control humidity. Room humidity setpoints are established by the user. The humidifier components include: a steam canister (replace...

Product Features 3 1.3 Ancillary (Ship Loose Accessories) 1.3.1 Single Point Power Kit A Single Point Power Kit allows the connection of a system (Evaporator and indoor condensing unit) to a single power source when the units are close coupled. The kit includes a junction box with power distribution...

Site Preparation and Installation 4 2.0 S ITE P REPARATION AND I NSTALLATION 2.1 Installation Considerations The evaporator unit is usually mounted above the suspended ceiling using field supplied threaded rods. Refer to Figure 1 for possible configurations. The condensing unit may be: • Indoor Air-...

Site Preparation and Installation 5 2.1.2 Location Considerations Locate the evaporator unit over an unobstructed floor space if possible. This will allow easy access for routine maintenance or service. Do not attach additional devices to the exterior of the cabinet, as they could interfere with mai...

Site Preparation and Installation 7 Figure 3 System Configurations—chilled water systems 2.2 System Weights 2.3 Equipment Inspection upon receipt When the unit arrives, do not uncrate equipment until it is close to its final location. All required assemblies are banded and shipped in corrugated cont...

Site Preparation and Installation 8 2.4 Installing the Evaporator or Chilled-Water Units The evaporator unit and indoor condensing unit are usually mounted above the ceiling and must be securely mounted to the roof structure. The ceiling and ceiling supports of existing buildings may require reinfor...

Site Preparation and Installation 9 2.4.1 Close Coupled Installations If the evaporator and condensing units are to be mounted side-to-side (close coupled), hang each unit before connecting them together (See Figure 5 ). If Single Point Power Kit is used, install the box into the evaporator prior to...

Site Preparation and Installation 10 2.4.2 Evaporator Air Distribution Filter Box The optional filter box mounts directly to the return air opening of the evaporator. The filter box is supplied with two (2) 20% (Liebert part no. A-0320) or 30% (Liebert part no. A-0400) 25" x 20" x 4" fil...

Site Preparation and Installation 11 2.4.3 Piping Connections and Coolant Requirements Drain Line A 3/4 in. (19.1 mm) female pipe thread (FPT) connection is provided for the evaporator coil condensate drain. This line also drains the humidifier, if applicable. The drain line must be located so it wi...

Site Preparation and Installation 12 Condensate Pump The optional condensate pump kit is required when the evaporator is installed below the level of the gravity-fed drain line. Refer to the installation instructions provided with the condensate pump kit. Figure 7 Condensate pump installation Humidi...

Site Preparation and Installation 13 Chilled-Water Piping—Chilled-water Systems Only Refer to Figure 8 for recommended field installed hardware such as shut-off valves and hose bibs. Chilled-water supply and return lines must be insulated to prevent condensation.The minimum recommended water tempera...

Site Preparation and Installation 14 Refrigerant (R-22) Piping All split systems require two sets of refrigerant lines (two insulated copper suction lines and two cop- per liquid lines) between the evaporator and the condensing unit.Two possible methods exist for installing the copper suction and li...

Site Preparation and Installation 15 Refrigerant Charge Requirements: Total refrigerant charge (R-22) will be required only if units are evacuated during installation or maintenance. For safe and effective operation, refer to 2.4.3 - Piping Connections and Coolant Requirements . Total refrigerant = ...

Site Preparation and Installation 16 Figure 10 Evaporator or chilled-water unit dimensional data 49 " 21 1/2 " 1 " 19 1/2 " 1 " 17 1/2 " 8 " 1 " 47 " 1 " (1244.6mm) (25.4mm) (25.4mm) (25.4mm) (495.3mm) (444.5mm) (1193.8mm) (25.4mm) (203mm) (546.1mm) Duct Flang...

Site Preparation and Installation 17 2.4.4 Electrical Connections, Evaporator or Chilled-Water Unit Each unit is shipped from the factory with internal wiring completed. Refer to electrical sche- matic, Figure 11, Figure 25, and Figure 26 when making connections. Electrical connections to be made at...

Site Preparation and Installation 18 Figure 11 Evaporator unit electrical connections Field supplied, field wired thermostat wire to remote wall box. Entrance for customer low voltage connections Field supplied 24V (NEC Class2 wiring) to condensing unit. (if applicable) Entrance for customer lowvolt...

Site Preparation and Installation 19 2.5 Indoor Air-Cooled Centrifugal Fan Condensing Unit Installation 2.5.1 Location Considerations The centrifugal fan air-cooled condensing unit may be located above the dropped ceiling or any remote indoor area. If noise is of concern, the condensing unit should ...

Site Preparation and Installation 20 2.5.3 Piping Connections Details for refrigerant (R-22) loop piping are in 2.4.3 - Piping Connections and Coolant Require- ments . Figure 12 Piping connections - indoor air-cooled centrifugal fan condensing unit 2.5.4 Electrical Connections - Condensing Unit Refe...

Site Preparation and Installation 22 Figure 14 Indoor air-cooled centrifugal condenser electrical connections RemovableAccess Panels Connection Terminal forField Supplied EarthGrounding Wire. Line Voltage Electric Power Supply Conduit. Openings for Field Supplied24V NEC Class 2 WiringBetween Condens...

Site Preparation and Installation 23 2.6 Outdoor Air-Cooled Condensing Unit Installation 2.6.1 Location Considerations To insure a satisfactory air supply, locate air-cooled propeller fan condensing units in an environment providing clean air, away from loose dirt and foreign matter that may clog th...

Site Preparation and Installation 24 Figure 15 Electrical field connections - outdoor condensing unit Field supplied unitdisconnect switch. Single or three phaseelectric service not providedby Liebert. Field supplied 24V NEC class 2wiring to evaporator module. Factory wired to components on electric...

Site Preparation and Installation 25 Figure 16 Footprint dimensions - outdoor condensing unit Model Dimensional Data in. (mm) Net Weight lbs (kg) 60 Hz 50 Hz Width (A) Height (B) Depth (C) PFC096A-_L PFH096A-_H PFC095A-_L PFH095A-_L 53 (1343) 53 (1343) 36-1/4 (918) 36-1/4 (918) 38-1/2 (978) 38-1/2 (...

Site Preparation and Installation 26 Figure 17 Piping and electrical connections - outdoor condensing unit Model Numbers Electrical Connections In. (mm) Piping Connections In. (mm) 60 Hz 50 Hz A B C D E F G PFC096A-L PFC095A-L 2 (51) 6 (152) 8-1/2 (216) 4-3/4 (121) 7-3/4 (197) 8-1/2 (216) 11-1/2 (29...

Site Preparation and Installation 27 2.7 Indoor Water- and Glycol-Cooled Condensing Unit Installation 2.7.1 Location Considerations The condensing unit may be located above the dropped ceiling or any remote indoor area. If noise is of concern, the condensing unit should be located away from personne...

Site Preparation and Installation 28 Figure 18 Indoor water/glycol condensing unit dimensional data 1. 24V GND System 1 2. 24V Supply System 1 3. High-Pressure Alarm System 1 4. Hot Gas Bypass Connection System 1 (only on units with hot gas bypass. If no hot gas bypass, connection is provided in the...

Site Preparation and Installation 30 Figure 20 System piping with indoor water/glycol-cooled condensing unit Two circuits provided. Single circuit shown. SL-11088Pg7

Site Preparation and Installation 31 2.8 Optional Equipment Piping 2.8.1 Free-Cooling Coil (GLYCOOL) The free-cooling coil is a secondary coil located upstream of the DX coil. To take maximum advantage of available free-cooling, the secondary coil may operate at the same time as the DX coil. A tempe...

Site Preparation and Installation 33 2.9 Checklist for Completed Installation ___ 1. Proper clearance for service access has been maintained around the equipment.___ 2. Equipment is level and lock-nuts are installed with the leveling nuts on the spring isolators.___ 3. Piping completed to refrigeran...

Microprocessor Control 34 3.0 M ICROPROCESSOR C ONTROL The Microprocessor Control for the Liebert Mini-Mate2 unit features an easy to use menu-driven LCD display. The menus, control features, and circuit board details are described in this section. Detailed information concerning controls ( 4.0 - Sy...

Microprocessor Control 35 3.2 Main Menu <Menu> Press the MENU key to display the Main Menu. The Menu selections (in the following order) include: • SETPOINTS• STATUS• ACTIVE ALARMS• ALARM HISTORY• TIME• DATE• SETBACK• SETUP OPERATION• SETPT PASSWORD• SETUP PASSWORD• CALIBRATE SENSOR• ALARM ENA...

Microprocessor Control 36 3.3 Setpoints Setpoints and system setup parameters are kept in nonvolatile memory. Selecting SETPOINTS from the Main Menu will display the following selections: • TEMPERATURE SETPOINT• TEMPERATURE SENSITIVITY• HUMIDITY SETPOINT• HUMIDITY SENSITIVITY• HIGH TEMPERATURE ALARM...

Microprocessor Control 37 3.7 Time The controller time clock must be set to allow for the setback control. The clock uses the 24-hour sys- tem (i.e., 12 midnight is entered 24:00). To change the time press ENTER to select the function, then use the UP/DOWN arrow to change the first character, press ...

Microprocessor Control 38 3.10.2 C/F Degrees The control may be selected to show readings and setpoints in either degrees Fahrenheit (°F) or in degrees Celsius (°C). To change the value use ENTER to select this function, then use the UP/DOWN arrow to change the value. Press ENTER to store the value....

Microprocessor Control 39 3.10.7 CW Flush (For Systems With a Modulating Chilled-Water Valve) This function shows the interval time at which the system will perform a modulating chilled-water valve system flush cycle. The factory default is 24 (hours) and is programmable from 0 (hours) which signifi...

Microprocessor Control 40 3.14 Alarm Time Delay Each individual alarm can be programmed with a time delay ( Table 13 ), causing the unit to delay a specified amount of time (0-255 seconds) before recognizing the alarm. The alarm condition must be present for the full amount of the time delay before ...

Microprocessor Control 41 3.17 Custom Text To modify the two custom alarm messages select “CUSTOM TEXT”. Then select “Custom Text #1,” “Custom Text #2” or “Custom Text #3.” Text can be up to 16 characters in length and can be either a blank space or any of the following alphanumeric characters and s...

Microprocessor Control 42 3.18 Run Diagnostics By selecting Run Diagnostics, maintenance personnel can check system inputs, outputs, and conduct a test of the microcontroller circuit board from the wall box control. A review of the system inputs and the microcontroller test can be done without inter...

Microprocessor Control 43 Test Micro By selecting this function, the microcontroller will perform a self test lasting approximately 10 sec- onds. When the test is complete, the display will show the ROM checksum, ROM part number, and firmware revision number. Figure 24 Control menu Menu Setpoints St...

Microprocessor Control 44 Figure 25 Control board (inside evaporator) Figure 26 Wall box board P18 P1 P2 P3 P39 P38 P40 TB P22 P36 P34 P8 P32 P35 P4 P43 P7 P25 T- P5 P16 P10 G2 G3 G4 G5 P33 P26 T+ GND +5V TB3-4 Connection to Terminal #4 Wallbox TB3-3 Connection to Terminal #3 Wallbox TB3-2 Connectio...

System Performance Microprocessor Controls 45 4.0 S YSTEM P ERFORMANCE M ICROPROCESSOR C ONTROLS 4.1 Control Type Response Proportional Control The percent requirement is determined by the difference between the return air temperature and the temperature setpoint. As the return air temperature rises...

System Performance Microprocessor Controls 46 4.4 Dehumidification / Humidification Percent Required The humidity control for the MM2 is based on a calculated percent requirement for dehumidification or humidification. The percent requirement is calculated from the difference between the sensor read...

Alarms 47 5.0 A LARMS The microprocessor control system will audibly and visually signal all ENABLED Alarms (including two (2) custom alarms). These special alarms can be chosen from the optional alarm list and/or can have their own fully custom text. The custom alarm inputs are contact closures wir...

Alarms 48 5.1.3 Humidity The humidity alarm may be activated under the following conditions: • High: The room return air humidity exceeds the pre-set high humidity alarm setpoint. Is the unit set up for dehumidification? Check DIP switch. • Low: The room return air humidity decreases to the low humi...

Alarms 49 5.2 Optional/Custom Alarms 5.2.1 Change Filter Periodically, the return air filters in the evaporator must be changed. The Change Filter alarm noti- fies the user that filter replacement is necessary. A differential air pressure switch closes when the pressure drop across the filters becom...

System Operation, Testing, and Maintenance 50 6.0 S YSTEM O PERATION , T ESTING , AND M AINTENANCE This section describes system testing, maintenance and replacement procedures. Use copies of the Maintenance Inspection Checklist to record preventive maintenance inspections. 6.1 System Testing 6.1.1 ...

System Operation, Testing, and Maintenance 51 6.2 Maintenance and Component Operation 6.2.1 Electric Panel The electric panel should be inspected on a semi-annual basis for any loose electrical connections. 6.2.2 Filters Filters are usually the most neglected item in an environmental control system....

System Operation, Testing, and Maintenance 52 6.2.4 Electric Reheat Reheat element sheets and fins are manufactured with stainless steel. Regular inspections are neces- sary to assure proper cleanliness of the reheating element. Should inspection reveal corrosion parti- cles on the reheating element...

System Operation, Testing, and Maintenance 53 Regulating Valves (Water/Glycol Condensing Units) The water regulating valve automatically regulate the amount of fluid necessary to remove the heat from the refrigeration system, permitting more fluid to flow when load conditions are high and less fluid...

System Operation, Testing, and Maintenance 54 Replacement Procedures Compressor Replacement: Infrequently a fault in the motor insulation may result in a motor burn- out (if system is properly installed, motor burnout rarely occurs). Primarily this type of failure is due to mechanical or lubrication...

System Operation, Testing, and Maintenance 55 6.2.6 Steam Generating Humidifier - Operation Procedures Steam generating humidifiers operate efficiently over a wide range of water quality conditions and automatically adjust to changes in the conductivity of water. The system will automatically drain ...

System Operation, Testing, and Maintenance 56 Replacing the Humidifier Canister The proper procedure to replace the humidifier canister is:1. Turn off the humidifier by lowering the humidity setpoint below the ambient humidity level. Record the original setpoint. 2. Turn unit off at wallbox.3. Place...

Maintenance Inspection Checklist 57 7.0 M AINTENANCE I NSPECTION C HECKLIST JOB NAME: ______________________________ ROOM TEMP/HUM: ______________________________ SERIAL: ______________________________ DATE: ______________________________ UNIT MODEL: ______________________________ COND. MODEL: _____...

Troubleshooting 58 8.0 T ROUBLESHOOTING Table 18 Troubleshooting Symptom Possible Cause Check or Remedy Unit will not start No power to unit Check voltage at input terminal block. Control voltage fuses (at transformer) open Locate and repair short. Replace fuses. Float switch relay has closed due to...

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