Emerson Copeland EazyCool OLQ-24V-Nxx-TWD Series Application Manuallines Download Page 26

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Safety

Instructions

Product

Description

Installat

Electrical

Connection

Starting up &

Operation

Maintenance

& Repair

Dismantling &

Disposal

Condensing Unit For Refrigeration Networks

3.7.4 3 Unit Network : Installation, dimensions and piping details

Medium Temperature Network

Low Temperature Network

00 m

40 m

+/- 600 mm

+/- 4900 mm

Oil distribution circuit

r F

Communication cable

Suction pipe from evaporator(s)

Liquid pipe to evaporator(s)

00 m

+/- 600 mm

+/- 4900 mm

Oil distribution circuit

r F

Communication cable

Suction pipe from evaporator(s)

Liquid pipe to evaporator(s)

Low temperature networks need additional piping between each unit heat exchanger and
the receiver, in order to get liquid for vapour injection.

IMPORTANT

For low temperature network systems, Copeland recommends to insulate the complete
liquid outlet line to the expansion valve in order to optimise the sub-cooling effect.

C6.1.4/0305/E

Part no: 3136433

Summary of Contents for Copeland EazyCool OLQ-24V-Nxx-TWD Series

Page 1: ...Copeland EazyCoolTM outdoor condensing units for refrigeration networks Application Guidelines ...

Page 2: ...MAIN COMPONENT DESCRIPTION 6 3 INSTALLATION 13 3 1 CONDENSING UNIT HANDLING 13 3 2 CONNECTION ACCESS 15 3 3 ELECTRICAL BOX ACCESS 15 3 4 ELECTRICAL CONNECTION 16 3 5 REFRIGERATION CONNECTIONS 18 3 6 2 UNIT NETWORK INSTALLATION 20 3 7 3 4 UNIT NETWORK 23 3 8 ELECTRONIC CONTROLLER EC2 551 29 4 STARTING UP OPERATION 31 4 1 CHARGING PROCEDURE 31 4 2 SOUND 31 4 3 ROTATION DIRECTION OF SCROLL COMPRESSOR...

Page 3: ...fety instructions 1 1 Icon explanation WARNING This Icon indicates instructions to avoid heavy personnel injuries and heavy material damage High Voltage This icon indicates operations with a danger of an electric shock Danger of burning or frostbite This icon indicates operations with a danger of burning or frostbite Explosion Hazard This Icon indicates operations with a danger of explosion CAUTIO...

Page 4: ...intervene on COPELAND condensing units The contractor responsible for the installation of the unit should ensure sufficient liquid sub cooling in the line to the expansion valve s to avoid flash gas in the liquid line It is of vital importance that the discharge stop valve has been fully opened before the compressor is started If the discharge stop valve is closed or partly closed an unacceptable ...

Page 5: ...suction pressure Oil distribution oil reservoir in master unit Communication for remote monitoring The Slave unit takes care of Fan speed control And emergency control in case of communication line disruption between the unit master slave Each Network should have only one master unit 2 2 Network configurations Basically there are three different configurations possible two unit network three unit ...

Page 6: ...ion EVI 6 N Unit suitable for creation of a refrigeration network 7 L Liquid receiver included only for 2 unit network 8 O Oil reservoir included always Master 9 Motor version TFD or TWD 380 420V 3Ph 50H 2 5 Application range 2 5 1 Qualified refrigerants and oils OMQ 56 Nxx OMQ 110 Nxx OMTQ 60 D Nxx OMTQ 76 Nxx OMTQ 90 D Nxx OLQ 24V Nxx OLQ 48V Nxx OLTQ 26V Nxx OLTQ 36V Nxx Qualified refrigerant R...

Page 7: ...zyCool condensing units for refrigeration networks 2 6 2 Sound Blanket The OM T Q and OL T Q units include one or two compressors equipped with a sound jacket The sound jacket developed by Copeland has no impact on the performance of the compressor The design consists of a top cap cover and compressor shell cover with adjustable Velcro system It has good characteristics in case of fire and is resi...

Page 8: ...ing to standard EN378 2 is the responsibility of the installer Rotalock service valve Receiver volume l OMQ 56 Nxx to OMQ 110 Nxx OLQ 24V Nxx to OLQ 48V Nxx OMTQ 60 Nxx to OMTQ 90 Nxx OLTQ 26V Nxx to OLTQ 36V Nxx Model Type 24 Table 4 Receiver volume It is recommended to charge the system with refrigerant via the Rotalock service valves Liquid receiver for 3 and 4 unit network system With larger s...

Page 9: ...ximum allowable working pressure MAWP 33 Bar Fitting a pressure relief device according to standard EN378 2 is the responsibility of the installer 2 6 5 Electrical box components All electrical components are pre wired into the panel This panel contains Compressor contactor s Fuse Terminal blocks DIN rail mounted terminals Electronic controller Fan Speed controller Alarm relays 2 6 6 Pressure swit...

Page 10: ...bar Differential adjustment range LP 0 5 to 5 bar HP 4 bar Factory setting LP 3 5 4 5 bar HP 20 bar 2 4 1 p 2 PS1 W3A Alco Controls single low pressure switch with automatic reset The control is equipped with display scale and pointers to indicate the approximate settings The display scales are printed in relative pressure units bar and psi For precise setting of the control external gauges must b...

Page 11: ... speed controller Two fans are controlled at the same time The control operates with single phase motors The electrical connection is made in the terminal box of the condensing unit Using a fan speed controller offers the following benefits for your application The head pressure can be kept high enough to ensure proper operation of the expansion valve and hence sufficient mass flow through the exp...

Page 12: ...efrigerant liquid that will be injected into the evaporator The small amount of evaporated refrigerant in the liquid sub cooler is injected into the compressor and provides additional cooling at higher compression ratios similar to liquid injection The diagram below explains the refrigerant flows Since the liquid temperature can be as low as 15 C liquid line insulation should be applied to avoid f...

Page 13: ...owing characteristics Hermetic construction Comply with UL standard and HP German pressurised vessel regulations CE standard effective Nov 1999 PED category I 2 6 13Electronic oil control system Alco OM3 Each compressor is fitted with an Alco Controls OM3 oil level controller which supplies oil only when required An oil reservoir is provided on the Master unit in a network and hence variations in ...

Page 14: ...erature thus reduce the cooling capacity and lead to a high pressure switch tripping Clean the condenser fins on a regular basis 3 1 Condensing unit handling 1 1 2 Storage Transport 3 1 1 Transport and storage It is recommended to keep the unit packaged until final installation We recommend handling large outdoor units when boxed with a forklift on the position indicated on the box Compressor s an...

Page 15: ...LO NL NO N 245 289 OMTQ 60 NLO NL NO N 216 260 OLTQ 26V NLO NL NO N 218 262 OMTQ 60 D NLO NO 216 260 OMTQ 76 NLO NL NO N 218 262 OMTQ 90 NLO NL NO N 222 266 OLTQ 36V NLO NL NO N 224 268 OMTQ 90 D NLO NO 222 266 Condensing unit with single compressor Condensing unit with two compressors Weight kg Weight kg Low temperature units Medium temperature units Table 7 Weights twin fan units Net weight bare...

Page 16: ... 2 Connection access Access door to electrical and refrigeration components Access door opening use supplied key to open and close the access door 3 3 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 15 Part no 3136433 ...

Page 17: ...lectrical components pre wired Compressor s contactor Condenser Fan motors Fan Speed controller High and Low pressure switches Electronic controller Crankcase heater s Care should be taken for electrical connection to avoid reverse rotation see paragraph 6 6 3 4 3 Discharge temperature protection Discharge line thermostat Under extreme operating conditions internal discharge temperatures can reach...

Page 18: ... 25 1 167 2 x 301 1 56 28 22 OMQ 110 NLO NL NO N 29 2 198 2 x 301 1 56 32 32 Low Temperature TWD TWD 230V 1 50Hz TWD OLQ 24V NLO NL NO N 16 1 2 x 145 0 67 17 44 OLQ 33V NLO NL NO N 22 3 2 x 145 0 67 23 64 OLQ 40V NLO NL NO N 25 1 2 x 301 1 56 28 22 OLQ 48V NLO NL NO N 30 6 2 x 301 1 56 33 72 Two compressor condensing unit Max operating Current compressor 1 Locked Rotor Current compressor 1 Fan Mod...

Page 19: ...er unit oil reservoir Only on condensing units in network of 2 units Liquid line should be insulated on OLQ 24V N to OLQ 48V N OLTQ 26V N OLTQ 36V N Temperature could be as low as 15 C 3 5 1 Brazing recommendation Remove the plugs in the following sequence 1 Remove the discharge connection plug 2 Then remove the suction connection plug Removing the plugs in this sequence prevents oil mist from coa...

Page 20: ...pproaches brazing temperature 2 Heat area 2 until braze temperature is attained It is necessary to heat the tube evenly Move the torch up and down and rotating around the tube 3 Add braze material to the joint while moving the torch around the joint to flow braze material around the circumference 4 Then heat area 3 This will draw the brazing material down into the joint NOTE The time spent heating...

Page 21: ...efore a network could be composed of either only single compressor units or two compressor units Network configuration could be composed also by a single compressor unit as master which will start first always and a two compressor unit as slave NOTE Configuration with a two compressor unit as master and a single compressor unit as slave is not recommended as modulation steps would not be all the t...

Page 22: ... Refrigeration Networks 3 6 3 Installation dimensions and piping details Put the units in their final position as indicated 1000 mm 2240 mm Unit length 2100 mm 2 Suction pipe from evaporator s 1 Air Flow Air Flow 1 2 Liquid pipe to evaporator s 500 mm 4700 mm 600 mm Suction pipe from evaporator s Liquid pipe to evaporator s C6 1 4 0305 E 21 Part no 3136433 ...

Page 23: ...alization lines Liquid equalization line to be connected between 2 receivers is on the middle bottom of the unit Copper connection Diameter 1 1 8 Gas pressure equalization Copper connection Diameter 5 8 Oil inlet and outlet The oil distribution lines with Schraeder valves need to be connected with flexible hoses Option proposed by Copeland 2 unit Network back to back configuration Copeland recomme...

Page 24: ...to insulate the complete liquid outlet line to the expansion valve in order to optimise the sub cooling effect 3 7 1 3 4 Unit Network Master Slave selection recommendations As compressor starting priority is based on balancing running hours Copeland recommends the compressor used in the Master unit to be bigger and or equal in capacity as in Slave units in order to achieve identical capacity modul...

Page 25: ... Connection Starting up Operation Maintenance Repair Dismantling Disposal 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 24 Part no 3136433 ...

Page 26: ...ication cable Suction pipe from evaporator s Liquid pipe to evaporator s 1000 mm 2240 mm 600 mm 4900 mm Oil distribution circuit Air Flow Air Flow Air Flow Communication cable Suction pipe from evaporator s Liquid pipe to evaporator s Low temperature networks need additional piping between each unit heat exchanger and the receiver in order to get liquid for vapour injection IMPORTANT For low tempe...

Page 27: ...ch heat exchanger Liquid line from Heat Exchanger for low temperature networks The liquid outlet line from the heat exchanger to the system to evaporators needs to be insulated Liquid outlet diameter is 5 8 Oil inlet and outlet The oil distribution lines with Schraeder valves need to be connected with flexible hoses option proposed by Copeland Care should be taken when connecting the hoses oil in ...

Page 28: ...e to evaporator s Air Flow Air Flow Air Flow Air Flow 600 mm 1000 mm 2240 mm 500 mm 620 mm 6000 mm Oil distribution circuit Suction pipe from evaporator s Liquid pipe to evaporator s Air Flow Air Flow Air Flow Air Flow 600 mm 1000 mm 2240 mm 500 mm 620 mm 6000 mm Oil distribution circuit Communication cable Communication cable IMPORTANT For low temperature network systems Copeland recommends to in...

Page 29: ...rature networks Liquid outlet line from the heat exchanger to the system to evaporators needs to be insulated Liquid outlet diameter is 5 8 Oil inlet and outlet The oil distribution lines with Schraeder valves need to be connected with flexible hoses option proposed by Copeland Care should be taken when connecting the hoses oil in of the master unit should connected the to oil out of the slave uni...

Page 30: ...or the one with a compressor to cover the base load 2 Enter the password default 12 3 Press Sel key The Display shows a blinking b1 master unit 4 Press the Service Pin button for 1 sec min on every slave unit that will take part of the paralleling group 5 The display on the master increments the digit following the b The number of slave units is restricted to 3 b2 to b4 6 To execute the binding pr...

Page 31: ...l to 0 The first modifiable parameter code is displayed 1 To modify parameters see Parameters modification below In case of password value not equal to 0 A flashing 0 is displayed Press or until the password value is displayed Press Sel to confirm password The first modifiable parameter code is displayed 1 To modify parameters see Parameters modification below 3 8 5 2 Parameters modification Press...

Page 32: ...oper direction Three phase compressors will rotate in either direction depending upon phasing of the power Since there is a 50 50 chance of connecting power in such a way as to cause rotation in the reverse direction it is important to include notices and instructions in appropriate locations on the equipment to ensure proper rotation direction when the system is installed and operated 4 3 1 Units...

Page 33: ... and unscrew the flare Rotalock connector from the compressor Release the compressor mounting parts and then lift it to replace with a new compressor 6 Certification and Approval The piping is in compliance with the Pressure Equipment Directive 97 23 EEC Art 3 3 Sound Engineering Practice Components of the condensing units carry a CE mark as far as required and thereby establish conformity with th...

Page 34: ...a D 63477 Maintal P 02 673 Warszawa Tel 49 0 6109 6059 0 Tel 48 225 458 9205 Fax 49 0 6109 6059 40 Fax 48 225 458 9255 France Greece Maghreb Russia CIS 8 Allee Du Moulin Berger Malaya Trubetskaya 8 11th Floor F 69130 Ecully RUS 119881 Moscow Tel 33 0 4 78668570 Tel 7 095 232 94 72 Fax 33 0 4 78668571 Fax 7 095 232 03 56 Italia Middle East Africa Via Ramazzotti 26 PO Box 26382 R A 8 FD 2 I 21047 Sa...

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