Table of Contents
Table of Contents
Related Manuals for Emerson Copeland EazyCool OMQ-56-Nxx-TWD Series
Summary of Contents for Emerson Copeland EazyCool OMQ-56-Nxx-TWD Series
- Page 1 Copeland EazyCool outdoor condensing units for refrigeration networks...
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Page 2: Table Of Contents
Condensing Unit For Refrigeration Networks SAFETY INSTRUCTIONS ................... 2 ....................2 CON EXPLANATION ....................2 AFETY STATEMENTS ..................3 ENERAL INSTRUCTIONS : ................... 3 BOUT THIS GUIDELINE PRODUCT DESCRIPTION..................4 ™ ..4 OPELAND CONDENSING UNITS FOR REFRIGERATION NETWORKS ..................4 ETWORK CONFIGURATIONS ..................... -
Page 3: Safety Instructions
Condensing Unit For Refrigeration Networks Safety instructions The Copeland EazyCool™ condensing units are manufactured according to the latest and valid industrial standards. Particular emphasis has been placed on the user safety. These condensing units are intended for installation in machines and systems according to the EC Machines directive. -
Page 4: General Instructions
Condensing Unit For Refrigeration Networks General instructions WARNING System breakdown! Personnel injuries! Never install a system in the field and leave it unattended when it has no charge, a holding charge, or with the service valves closed without electrically locking out the system. System breakdown! Personnel injuries! Only approved refrigerant and refrigerating oils must be used. -
Page 5: Product Description
Condensing Unit For Refrigeration Networks Product Description About Copeland EazyCool™ condensing units for refrigeration networks Copeland has developed a special version of Copeland EazyCool condensing units that can be used to create medium and larger size refrigeration network systems. The range consists of Copeland EazyCool condensing units for medium and low temperature applications and covers units from 7.5 to 15 hp. -
Page 6: Nomenclature
Condensing Unit For Refrigeration Networks Nomenclature The model designation contains the following technical information about the condensing unit: N L O OM T Q 90 D 6 7 8 1 2 3 4 5 Specific for Network models 1 - Condensing unit family: OM = Medium temperature Copeland EazyCool™... -
Page 7: Main Component Description
Condensing Unit For Refrigeration Networks Main component description 2.6.1 Compressor Medium Temperature Low Temperature Unit Model Compressor Model Unit Model Compressor Model Single compressor unit OMQ-56-Nxx-TWD ZB56KCE-TWD-551 OLQ-24V-Nxx-TWD ZF24KVE-TWD-551 OMQ-75-Nxx-TWD ZB75KCE-TWD-551 OLQ-33V-Nxx-TWD ZF33KVE-TWD-551 OMQ-92-Nxx-TWD ZB92KCE-TWD-551 OLQ-40V-Nxx-TWD ZF40KVE-TWD-551 OMQ-110-Nxx-TWD ZB11MCE-TWD-551 OLQ-48V-Nxx-TWD ZF48KVE-TWD-551 Two compressor unit OMTQ-60-Nxx-TFD... - Page 8 Condensing Unit For Refrigeration Networks 2.6.4 Liquid receiver Liquid receiver for 2 unit network system Master and Slave units for 2-unit network configuration are equipped with a liquid receiver. The liquid receivers are equipped with: Rotalock service valves for connection of a liquid level equalisation line as well as a gas pressure equalisation line between the receivers to ensure equal liquid levels in both receivers.
- Page 9 Condensing Unit For Refrigeration Networks The LRU collects liquid refrigerant from each condenser in a network. It has a single liquid inlet and outlet line. Receiver Depth / Width Height Dimensions Liquid Liquid Weight Capacity (holes) Inlet diameter Outlet diameter Net/Gross b x t,(ø...
- Page 10 Condensing Unit For Refrigeration Networks 1) PS2-W7A: Alco Controls® dual pressure switch with automatic reset (for single compressor unit) The switch is equipped with display scale and pointers to indicate the approximate settings. The display scales are printed in relative pressure units “bar”...
- Page 11 Condensing Unit For Refrigeration Networks 4) PT3 Pressure Transmitter (Alco Controls) Two compressor-condensing units are equipped with HP and LP pressure transmitters that are connected to the EC2 electronic controller. The EC2 controller description and programming instructions are available in the corresponding guideline (C6.1.5/E, Part no: 3136444) which is shipped with the units.
- Page 12 Condensing Unit For Refrigeration Networks 2.6.10 Liquid sub-cooler Condensing units for low temperature applications are equipped with a liquid sub-cooler. This heat exchanger is used to provide additional sub-cooling to the refrigerant before it enters the evaporator. This sub-cooling provides a considerable cooling capacity increase.
- Page 13 Condensing Unit For Refrigeration Networks 2.6.11 Solenoid Valve for Digital Scroll™ compressor Digital Scroll™ compressors in Copeland EazyCool™ condensing units are equipped with a 24 Volt AC solenoid valve. The Electronic Condensing Unit Controller operates the solenoid valve used for digital compressor modulation based on the suction pressure.
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Page 14: Installation
Condensing Unit For Refrigeration Networks Installation The Copeland EazyCool™ condensing units are delivered with a holding charge of neutral gas. WARNING High pressure! Injury to skin and eyes possible! Be careful when opening connections on a pressurized system. The condensing unit should be located in such a place to prevent any dirt, plastic bag, leaves or papers from covering the condenser and its fins. - Page 15 Condensing Unit For Refrigeration Networks Weight (kg) Weight (kg) Medium temperature units Low temperature units Gross Gross Condensing unit with single compressor OMQ-56 NLO/NL/NO/N OLQ-24V NLO/NL/NO/N OMQ-75 NLO/NL/NO/N OLQ-33V NLO/NL/NO/N OMQ-92 NLO/NL/NO/N OLQ-40V NLO/NL/NO/N OMQ-110 NLO/NL/NO/N OLQ-48V NLO/NL/NO/N Condensing unit with two compressors OMTQ-60 NLO/NL/NO/N OLTQ-26V...
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Page 16: Connection Access
Condensing Unit For Refrigeration Networks Connection access Access door to electrical and refrigeration components. Access door opening: use supplied key to open and close the access door. Electrical box access OMQ-56-Nxx to OMQ-110-Nxx, OMTQ-60(D)-Nxx to OMTQ90(D)-Nxx OLQ-24V-Nxx to OLQ-48V-Nxx, OLTQ-26V-Nxx & OLTQ-36V-Nxx Open the latch on the top of the electrical panel to open it forward C6.1.4/0305/E Part no: 3136433... -
Page 17: Electrical Connection
Condensing Unit For Refrigeration Networks Electrical connection 3.4.1 Power supply connections Electrical connection of the outdoor condensing unit network to the power supply must be made by qualified technicians, who should refer to the electrical diagrams located inside the electric connection panel. Main electrical cable entry Contactor Access to the... - Page 18 Condensing Unit For Refrigeration Networks 3.4.4 Electric protection standard Scroll compressors up to ZB45 / ZF18 are IP 21 according to IEC 34. All larger compressors are IP54. Fan IP54 according to IEC 34. HP-LP and HP safety pressure switches (Alco PS2 and PS1) are IP44 according to IEC 529/EN 60529.
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Page 19: Refrigeration Connections
Condensing Unit For Refrigeration Networks Refrigeration connections Master unit oil in / out connections 1 = Suction line 2 = Liquid outlet line 3 = Liquid level equalisation line (receiver) 4 = Liquid receiver pressure equalisation line (receiver) 5 = Outlet oil distributing circuit “Oil Out”... - Page 20 Condensing Unit For Refrigeration Networks Use a double-tipped torch Sectional view End of tube During brazing During brazing pull protect housing back line insulation. with a damp cloth Brazing of the tubes: For brazing of the tubes see illustration below and the following procedures: Fit the copper tube into the compressor tube.
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Page 21: Unit Network : Installation
Condensing Unit For Refrigeration Networks 2 Unit Network : installation Connection ø (inch) 1 Suction line 1 3/8 2 Liquid line 3 Liquid line equalizarion line (between receivers) 1 1/8 4 Liquid line pressure equalization line (between receivers) 5 Oil distribution lines with Schraeder valves Table 9: Connection Sizes In a 2-unit network, the tubing arrangement for low temperature as well as medium temperature is similar. - Page 22 Condensing Unit For Refrigeration Networks 3.6.3 Installation, dimensions and piping details Put the units in their final position as indicated: Liquid pipe to evaporator(s) Suction pipe from evaporator(s) Unit length: 2100 mm Suction pipe from evaporator(s) Liquid pipe to evaporator(s) >...
- Page 23 Condensing Unit For Refrigeration Networks Suction line connections An adequately sized suction header providing equal distribution of returning refrigerant to each condensing unit must be used. Suction type diameter at the rear of the unit is 1 3/8. Copper connection From Condensing Condensing...
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Page 24: 3 & 4 Unit Network
Condensing Unit For Refrigeration Networks 3 & 4 Unit Network Connection ø (inch) 1 Suction line 1 3/8 2 Liquid line to liquid receiver unit (LRU) 1 1/8 3 Oil distribution lines with Schraeder valves Only for low temperature units: 4 Liquid line from receiver to heat exchanger (sub-cooler) 1 1/8 5 Liquid outlet to liquid header... - Page 25 Condensing Unit For Refrigeration Networks 3.7.2 3 Unit network: Possible Master/Slave configurations 3.7.3 4 Unit network: Possible Master/Slave configurations C6.1.4/0305/E Part no: 3136433...
- Page 26 Condensing Unit For Refrigeration Networks 3.7.4 3 Unit Network : Installation, dimensions and piping details Medium Temperature Network +/- 4900 mm +/- 600 mm Oil distribution circuit Communication cable Liquid pipe to evaporator(s) Suction pipe from evaporator(s) Low Temperature Network +/- 4900 mm +/- 600 mm Oil distribution circuit...
- Page 27 Condensing Unit For Refrigeration Networks Suction Header An adequately sized suction header providing equal distribution of returning refrigerant to each condensing unit must be used. Suction type diameter at the rear of the unit is 1 3/8. Copper connection From Condensing evaporator(s) Unit...
- Page 28 Condensing Unit For Refrigeration Networks 3.7.5 4 Unit Network: Installation, dimensions and piping details Medium Temperature Network +/-6000 mm +/- 600 mm 620 mm +/- 500 mm Communication cable Oil distribution circuit Liquid pipe to evaporator(s) Suction pipe from evaporator(s) Low temperature Network +/-6000 mm +/- 600 mm...
- Page 29 Condensing Unit For Refrigeration Networks Suction Header An adequately sized suction header providing equal distribution of returning refrigerant to each condensing unit must be used. Suction type diameter at the rear of the unit is 1 3/8. Copper connection From evaporator(s) Condensing Unit From...
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Page 30: Electronic Controller Ec2-551
Condensing Unit For Refrigeration Networks Electronic Controller EC2-551 3.8.1 Binding Process EC2-551 controllers are pre-programmed as “Master” controllers by default. However, in a condensing unit network only one “Master” is allowed, all other controllers need to become “Slaves”. By altering parameters, controllers IR service LED can be turned into Slaves and the Master can identify which... - Page 31 Condensing Unit For Refrigeration Networks 3.8.4 Back-up in case of communication cable or controller failure In case of communication breakdown or controller failure, all units will start to operate in “stand alone mode”. To enable this (and to prevent a shortage of capacity due to compressors not starting), setpoints for suction pressure should be set as in the Master controller (parameter P0), but with a slightly higher values (0.1 bar higher versus the value of P0 in the Master unit).
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Page 32: Starting Up & Operation
Condensing Unit For Refrigeration Networks Starting up & Operation Charging Procedure It is recommended to charge the unit with refrigerant into the receiver, via the Rotalock service valve. Sound Sound data is given in the Copeland Selection software, available on www.eCopeland.com. -
Page 33: Maximum Compressor Cycle
Condensing Unit For Refrigeration Networks Maximum compressor cycle Maximum start per hour: 10 times Checks before starting & during operation Please check that all Rotalock valves are fully opened. Check that the electrical panel is closed. After starting and operation conditions are stabilised, we recommend to check the oil level in compressor(s) and if needed add oil to insure a sufficient oil level (middle of oil sight glass). - Page 34 Tel. +32 (0) 87 305411 - Fax +32 (0) 87 305506 - internet: www.ecopeland.com - email: [email protected] The Emerson logo is a trademark and service mark of Emerson Electric Co. Copeland Corporation is a division of Emerson Electric Co. Copeland is a registered trademark and Copeland EazyCool is a trademark of Copeland Corporation.