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Summary of Contents for Liebert Prop Fan Condensing Unit
Liebert Prop Fan Condensing Unit ® ™ User Manual–50 & 60Hz...
Nominal Capacity — = Standard Coil L = 95°F (35°C) Ambient Unit with Hot-Gas 1000 BTU/Hr C = Coated Coil Liebert Lee-Temp Bypass H = 105°F (41°C) Ambient Liebert Lee-Temp 0 = Standard Noise Level A = Air Cooled P = 208/230-1ph-60Hz...
Standard features include crankcase heater, high-pressure switch, condenser coil, sight glass, filter drier, hot gas bypass system with liquid quenching valve, direct drive propeller fan and motor, and Liebert Lee-Temp flood-back head pressure control.
Installation NSTALLATION Read this entire installation section before starting installation. This section details dimensional, electrical and piping information and specifications that affect the placement of the PFH unit in relation the connected evaporator unit, other outside units, barriers and walls. Be particularly mindful of service and airflow clearances and maximum equivalent piping distances and in elevation differences between PFH and connected evaporator unit.
Installation Dimensional Data Figure 1 Dimensions, horizontal air discharge Removable (right) panel Fan Rotation for access to refrigeration component (left side) Right Air Discharge Left Air Intake Shaded area indicates a minimum clearance of 18" (457mm) for proper air flow. Shaded area indicates a recommended clearance of 24"...
Installation Figure 2 Dimensions, top air discharge Top Air Guard Height Discharge Fan Rotation Right Air Intake Shaded area Left Air indicates a minimum Intake clearance of 18" (457mm) for proper air flow. 2" (51mm) Shaded area indicates a minimum Removable panel for access Shaded area clearance of 18"...
WALL MOUNTING RIGID MOUNTING Notes: 1. 1D18214P1 = Acme catalog no. T-1-37921 for all small systems except 3-ton Liebert DataMate with integral condenser. 2. 1D18214P2 = Acme catalog no. T-1-37922 for 3-ton Liebert DataMate with integral condenser. 3. Epoxy coated. Suitable for indoor/outdoor service. Horizontal- or vertical-mount.
Installation Figure 5 Piping and electrical connections, top air discharge * System 2 (5 Ton) Electrical Entrance for High-Voltage Connection Liquid Line Quick Connect Electrical Entrance for (Male Coupling) Low-Voltage Connection * System 1 (3 Ton) Suction Line Quick Connect DPN000133 (Male Coupling) Rev.
(5 Ton High Ambient or 5 Ton Quiet-Line) Electric service connection Factory-wired to contactor or terminal block to components on electric panel Single- or three-phase electric service not provided by Liebert High-voltage electric power supply entrance Heat rejection connection. Low-voltage electric Field-supplied 24V NEC power supply Class 2 wiring.
Electric service Factory-wired connection to contactor to components on or terminal block electric panel Single- or three-phase electric service not provided by Liebert High-voltage Heat rejection connection. electric power Field-supplied 24V NEC supply entrance Class 2 wiring. Low-voltage electric...
The 8-ton Liebert Mini-Mate2 split system units will require four refrigerant lines between the evaporator and condensing units. Each refrigeration circuit will need one insulated copper suction line and one copper liquid line.
Installation Figure 12 Refrigerant piping diagram Pitch down 1/2" (13mm) per 10 ft. (3m) Evaporator NOTE When installing remote condensing units below the NOTE evaporator, the suction gas line should be trapped When installing remote condensing units below the with an inverted trap to the height of the evaporator. evaporator, the suction gas line should be trapped with This prevents refrigerant migration to the compres- an inverted trap to the height of the evaporator .
Use a soft, flexible material to pack around the tubes when sealing openings in walls to prevent tube damage and to reduce vibration transmission. Table 7 Refrigerant charge in Liebert pre-charged R-407C line sets Line Size, Length, Charge R-407C, ft.
2.5.5 R-407C PFH Installed as a Replacement Condensing Unit in an R-22 System When replacing the condensing unit of an existing Liebert split system containing R-22 and mineral oil, the following should be considered. 1. Check for proper operation of the system prior to replacing the outdoor unit. If this is not possible, at minimum perform a leak check to ensure that the components that remain (line set, evaporator) are leak tight.
Installation Remove Existing Condensing Unit 1. Recover refrigerant in system using proper refrigeration practices. 2. Oil removal: The majority of the oil will be in the old condensing unit (compressor, condenser and receiver), which will be replaced with the new unit. 3.
Installation Electrical Connections Each unit is shipped from the factory with all internal wiring completed. All power, control wiring and ground connections must be made in accordance with the National Electrical Code and local codes. Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to Figures 5, 7 and 8 and electrical schematic (reference Figures 9 through 11) when making connections.
Installation 2.6.2 Low-Voltage Control Wire Sizing Low-voltage wiring should be sized to allow a 1 volt maximum drop due to line resistance between the evaporator and condensing unit. Use NEC Class 1 or 2 wiring according to wire routing conditions chosen, local codes and application limits in Tables 14 and 15.
• Dirty condensing coils • Crimped lines ® ™ Liebert Lee-Temp Flood Back Head Pressure Control Outdoor condensing unit components for head pressure control include a receiver, heater and three-way head pressure control valve. The head pressure control valve operates to maintain a minimum condensing pressure.
Operation Hot Gas Bypass 3.4.1 Operation When applying hot gas bypass with split system condensing units, bypassing discharge gas to the compressor suction line offers more flexibility than conventional hot gas bypass to the evaporator unit. The hot gas bypass valve is installed between the compressor discharge piping and suction piping, bypassing the condenser and evaporator coils.
Maintenance AINTENANCE General Access the condensing unit by removing the unit housing panel. Clean the air cooled condenser coil of all debris that will inhibit airflow. This can be done with compressed air or with a commercial coil cleaner. Check for bent or damaged coil fins and repair as necessary. During winter, do not permit snow to accumulate on or around the condensing unit.
Maintenance 4.2.1 Electrical Failure—Burnout In the event that there is an electrical failure and a complete burnout of the refrigeration compressor motor, the proper procedures must be performed in order to clean the system to remove any acids that would cause a future failure. NOTE Failure to properly clean the system after a compressor motor burnout will void the compressor warranty.
Maintenance Field Charge Verification An integral sight glass is provided with the receiver to assist in field charge verification. During charge verification set the control temperature down to keep the system running. If the system is equipped with hot gas bypass, de-energize it by removing power from the hot gas solenoid valve coil. To remove power, disconnect the solenoid leads from the unit contactor in the electric box (refer to specific unit schematic;...
Troubleshooting ROUBLESHOOTING Table 23 Troubleshooting Problem Cause Remedy No power to unit Check voltage at input terminal block. Check for 24VAC ±2VAC at control connections 1 & 2. If no voltage, check control setting requires cooling. If there Compressor contactor not pulling in is voltage, lockout relay may be energized.
+39 049 9719 111 Fax: +39 049 5841 257 While every precaution has been taken to ensure the accuracy and completeness of this literature, Liebert Corporation assumes no Asia responsibility and disclaims all liability for damages resulting from use of 29/F, The Orient Square Building this information or for any errors or omissions.