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Related Manuals for Galletti LEP
Summary of Contents for Galletti LEP
- Page 1 Installation use and maintenance Multifunction heat pumps 40 – 420 kW...
- Page 2 Page 2 of 28 RG66007652– Rev.00...
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Page 3: Table Of Contents
4.2 Electric connections of the circulation pump 4.3 Remote controls 4.4 Remote Summer-Winter changeover [Heat pump versions] 5. STARTING UP 5.1 Preliminary checks 5.2 Commissioning instructions for LEP series chillers 5.3 Starting operation 5.4 Checks during operation 5.5 Checking refrigerant load 5.6 Stopping the unit Page 3 of 28 RG66007652–... - Page 4 CONTENTS Page 6. OPERATING LIMITS 6.1 Use of glycol solutions 6.2 Working limits 6.3 Water flow to evaporator 7. SETTING CONTROL DEVICES 7.1 General Information 7.2 Maximum pressure switch 7.3 Minimum pressure switch 7.4 Service thermostat function 7.5 Antifreeze thermostat function 7.6 Anti-recycle timer function 8.
- Page 5 LEP Declaration of conformity The declaration of conformity is attached to each unit Page 5 of 28 RG66007652– Rev.01...
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Page 6: General Description
Heat pump mode with chiller side cycle inversion Possibility of even heat pump versions using condensation control The use of LEP C-H units is recommended within the functioning limits carried in this manual, or else the warranty attached to the sales contract would cease. -
Page 7: Cooling Circuit
LEP Compressors: only prime international brand Scroll compressors are used on the LEP units. The Scroll compressor is the best solution today in terms of reliability and efficiency in the range of power outputs up to 182 kW for each circuit and the best solution in terms of emitted sound output. - Page 8 LEP STANDARD COOLING CIRCUITS Cooling only versions (NB: standard layout; refer to the layout attached to the unit) Page 8 of 28 RG66007652– Rev.01...
- Page 9 LEP Page 9 of 28 RG66007652– Rev.01...
- Page 10 LEP Heat pump versions (NB: standard layout; refer to the layout attached to the unit) Page 10 of 28 RG66007652– Rev.01...
- Page 11 LEP Page 11 of 28 RG66007652– Rev.01...
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Page 12: Preliminary Procedures
LEP 2. PRELIMINARY PROCEDURES 2.1 Inspection upon reception Upon receiving the unit, check that it is perfectly intact: the chiller left the factory in perfect conditions; immediately report any signs of damage to the carrier and note them on the Delivery Slip before signing HiRef or its Agent must be promptly notified of the entity of the damage. -
Page 13: Unpacking
- solidity of the supporting surface; All the models of the LEP series have been designed and built for indoor installations. Due to the special care given to soundproofing and the fact that components and hot parts in general are closed inside, they do not require special rooms. -
Page 14: General Recommendations For Hydraulic Connections
3.3 Hydraulic connection to evaporator The LEP series units have no internal water unit fitted, as it is fitted externally to the unit. It is extremely important that the water inlet corresponds with the connection marked with the writing “Water Inlet”. - Page 15 Tank Q; TW in Q; TW out A standard feature of the LEP units is a device for controlling the flow rate (flow switch for differential pressure switch) in the water circuit in the immediate vicinity of the evaporator. Any tampering with said device will immediately invalidate the warranty.
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Page 16: Filling Tank And/Or Pumps (If Foreseen By The System)
LEP 3.4 Filling tank and/or pumps (if foreseen by the system) The tank has not generally been designed to withstand a depression greater than -0.15 Bar. For this reason, make sure the intake pressure of the pump, where the expansion tank is positioned, is always be greater than 0.5 Bar while the pump is operating: this... -
Page 17: Electric Connections Of The Circulation Pump
4.2 Electric connections of the circulation pump (if foreseen by the system) All the units of the LEP series are provided with a voltage-free contact in the electrical control board with which a low-voltage consent for the pump to start is powered. -
Page 18: Commissioning Instructions For Lep Series Chillers
- Make sure that the water circuit is duly bled to completely eliminate the presence of air: fill the circuit gradually and open the air vent valves on the top part, which the installer should have set in place. 5.2 Commissioning instructions for LEP series chillers Hydraulic connections: ... -
Page 19: Starting Operation
LEP Starting up: Check that all external cocks of the water circuit are open and water flows properly (the flow alarm should not be triggered). Put the main switch at the ON position. The (external) pump will start immediately. -
Page 20: Stopping The Unit
The degree of sub-cooling is given by the difference between the temperatures thus determined. Attention: all the units of the LEP series are loaded with R410A refrigerant except for the versions with remote condenser which are loaded with nitrogen. Eventual top-ups must be done with the same type of refrigerant and are part of the routine maintenance operations performed by qualified personnel. -
Page 21: Use Of Glycol Solutions
LEP Evaporator inlet Without using anti-freeze Condenser inlet Below 15°C condensation pressure must be controlled Heat pump units Water temperature Minimum Maximum N.B. Evaporator inlet (cooling Without using anti-freeze phase) Condenser inlet (cooling Below 15°C phase) condensation pressure must be controlled... -
Page 22: Water Flow To Evaporator
LEP 6.3 Water flow to evaporator The nominal flow rate is based on a temperature differential of 5° C between inlet and outlet water, in relation to the cooling capacity provided at the nominal water (12/7 °C) temperatures. The maximum allowed flow rate is associated with a temperature differential of 3 °C: higher flow rates cause high drops in pressure. -
Page 23: Maximum Pressure Switch
LEP 7.2 Maximum pressure switch The high pressure switch shuts down the compressor when delivery pressure exceeds the calibrated value. Attention: it is not allowed to modify calibration of the maximum pressure switch: Should the latter fail to work, rising pressure causes the high pressure safety valve to open. -
Page 24: Maintenance
LEP 8. MAINTENANCE Operating these units reduces itself to turning them on and off and to seasonal changeover between cooling and heating. All other operations are part of maintenance and must be carried out by qualified personnel capable of working in compliance with laws and standards in force. -
Page 25: Repairing The Cooling Circuit
LEP 8.3 Repairing the cooling circuit Attention: while performing repairs on the cooling circuit or maintenance work on the compressors, make sure the circuit is left open for as little time as possible. Even if briefly exposed to air, ester oils tend to absorb large amounts of humidity, which results in the formation of weak acids. -
Page 26: Restoring R410A Refrigerant Load
LEP 8.6 Restoring R410A refrigerant load - Connect the tank of refrigerant gas to the male 1/4 SAE inlet situated on the liquid line after discharging a little gas to eliminate air in the connection pipe. - Carry out the charging operation with the refrigerant in liquid form until you reach 75% of the total charge. -
Page 27: Troubleshooting
LEP 9. TROUBLESHOOTING The following pages list the most common causes that can block the chiller unit or cause it to malfunction. The division is made according to the easily detectable symptoms. You should be extremely careful when attempting to implement any of the possible remedies suggested: overconfidence can result in injuries, even serious ones, to inexpert individuals. - Page 28 LEP FAULT Analysis of possible causes Corrective action Faulty high pressure Unit too loaded detectable by sub- Discharge circuit. cooling greater than 8 °C. Thermostat valve and /or filter Check the temperatures upstream clogged. These aspects are also and downstream from the valve present with low pressure faults.
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