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INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
38RM 15 - 20 - 25
38RM 08 - 10 - 12
38RM 30 - 35 - 40 - 45 - 50
50HZ
Smart
the environmentally sound refrigerant
Link Control
Top Discharge Condensing Units Air Cooled with Axial Fans
38RM-N Series
08 - 10 - 12 - 15 - 20 - 25 - 30 - 35 - 40 - 45 - 50
* For the operation of the thermostat please refer to the
Nominal cooling capacity 28 - 175.8 kW
Smart Link wired Control manual 03506777
Miraco
Miraco
03507705
Miraco Carrier Rev. (0)-2024
MISR REFRIGERATION & AIR CONDITIONING MFG. CO.
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Table of Contents
Related Manuals for Carrier 38RM-N Series
Summary of Contents for Carrier 38RM-N Series
- Page 1 08 - 10 - 12 - 15 - 20 - 25 - 30 - 35 - 40 - 45 - 50 * For the operation of the thermostat please refer to the Nominal cooling capacity 28 - 175.8 kW Smart Link wired Control manual 03506777 Miraco Miraco 03507705 Miraco Carrier Rev. (0)-2024 MISR REFRIGERATION & AIR CONDITIONING MFG. CO.
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Page 4: Table Of Contents
Top Discharge Condensing Units Air Cooled with Axial Fans 38RM-N Series 08 - 10 - 12 - 15 - 20 - 25 - 30 - 35 - 40 - 45 - 50 Contents 1. INTRODUCTION 2. OPERATING CHECKS 3. SAFETY ADVICE 4. -
Page 5: Introduction
38RM-12N 46309548 Carrier 38RM-N series were born of a very simple concept: 38RM-15N 46309549 “ An excellent product isn’t enough; it must offer more than 38RM-20N 46309550 its competitors “. -
Page 6: Operating Checks
INTRODUCTION (Cont.) 2. OPERATING CHECKS IMPORTANT INFORMATION REGARDING THE REFRIG- 1.3 - Maintenance safety considerations ERANT USED : Technicians working on the electric or refrigeration compo- This product contains fluorinated greenhouse gas covered by the nents must be authorized, trained and fully qualified to do so. Kyoto protocol. - Page 7 OPERATING CHECKS (Cont.) 1 - Repair safety considerations ATTENTION: No part of the unit must be used as a walkway, Never use air or a gas containing oxygen during leak tests to rack or support. Periodically check and repair or if necessary purge lines or to pressurise a machine.
- Page 8 OPERATING CHECKS (Cont.) 2 - Moving and Sitting the unit 2.2 - Checks before system start-up Siting the unit Before the start-up of the refrigeration system, the complete installation, including the refrigeration system must be The machine must be installed in a place that is not accessible verified against the installation drawings, dimensional to the public or protected against access by non-authorised drawings, system piping and instrumentation diagrams and...
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Page 9: Safety Advice
3 - SAFETY ADVICE - Although it is not flammable, keep them away from open To avoid any risk of accident during installation, commission- flames (e.g. cigarettes) as temperatures of over 300°C cause ing or maintenance, it is obligatory to take into consideration their vapors to break down and form phosgene, hydrogen the following specifications for the units: refrigerated circuits fluoride, hydrogen chloride and other toxic compounds. -
Page 10: Transport And Handling
5 - TRANSPORT AND HANDLING These machines must be unloaded and positioned by a spe- cialist handling company using the appropriate, standardized tools. Important: outdoor module are supplied for building work in- stallation as split version, and the transport for the modules must be independent, never pre-assembled. -
Page 11: System Technical Data
6 - System Technical Data Model 38RM-08N 38RM-10N 38RM-12N 380 - 400 / 3 / 50 V/Ph/Hz Power Supply Minimum Volts – Maximum Volts 342 - 418 Btu/hr 100,000 128,000 143,000 10.7 11.9 Cooling 29.4 37.6 41.9 Capacity * 10.2 12.90 14.48 Total Power Input per Unit... - Page 12 System Technical Data (Cont.) Model 38RM-15N 38RM-20N 38RM-25N 380 - 400 / 3 / 50 V/Ph/Hz Power Supply 342 - 418 Minimum Volts – Maximum Volts 200,000 256,000 286,000 Btu/hr 16.7 21.4 23.6 Cooling 58.7 75.2 83.7 Capacity * Total Power Input per Unit 20.39 25.79 28.95...
- Page 13 System Technical Data (Cont.) 38RM-30 38RM-35 38RM-40 38RM-45 38RM-50 Model MODULE MODULE MODULE MODULE MODULE (A) (B) (A) (B) (A) (B) (A) (B) (A) (B) Power V/Ph/Hz 380 - 400 / 3 / 50 Supply Minimum Volts – Maximum Volts 342 - 418 Btu/hr 400,000...
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Page 14: Outline Dimension ( Mm )
7 - Outline Dimension ( mm ) 38RM 8N - 10N - 12N 1283 1283 1022... - Page 15 Outline Dimension ( mm ) (Cont.) 38RM 15N - 20N - 25N 2035 2035 1283...
- Page 16 Outline Dimension ( mm ) (Cont.) 38RM 30N - 35N - 40N - 45N - 50N 2035 2035 2550...
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Page 17: Electrical Data
8 - Electrical Data Cool Only - Top Discharge Condensing Units 38RM-N Series Air Cooled with Axial Fans Nominal power supply V/Ph/Hz 380 / 3 / 50 380 / 3 / 50 380 / 3 / 50 380 / 3 / 50... -
Page 18: Location And Assembling
9 - LOCATION AND ASSEMBLING 9.1 - Choice of location When choosing the location, the following precautions have to be taken into consideration: - It is mandatory to comply with norm EN 378-3 on Safety and Environmental Requirements. installation and protection to people. - The area where the unit will be located must be perfectly accessible for cleaning and maintenance operations (check minimum free space for maintenance). - Page 19 LOCATION AND ASSEMBLING (Cont.) Consider the service space There must be sufficient space for maintenance and repair work around the condensing units. Location of condensing unit relative to evaporator unit The installation location of condensing unit should be near to the evaporator unit to reduce length of refrigerant piping and electrical cables and to facilitate installation word.
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Page 20: Standard Components
10 - STANDARD COMPONENTS LEGEND 1. Compressor 2. Condenser Coils 3. Fan / Motors 4. High Pressure Controls 5. Low Pressure Controls 6. Liquid Line Filter Driers 7. Electrical panel including ( Contactors + Magnetic overloads + Phase Sequence ) 8. -
Page 21: Commissioning
Condensing Units Air Cooled with Axial Installation in the environment Fans 38RM-N Series • This probe must be fixed to the interior wall of the room to LCD Smart link wired controller is basically comprised of be conditioned, at ca. - Page 22 COMMISSIONING (Cont.) 11.3 - Outdoor module and indoor module in split version 38RM-N series Recommendations for the Split Connection Outdoor unit bottom Outdoor unit top - Maximum equivalent length of the refrigerant line: 30 metres - Maximum equivalent length of the refrigerant line: 50 metres.
- Page 23 COMMISSIONING (Cont.) Control of the refrigerant charge 11.4 - Checks prior to commissioning - To make sure that the unit is filled with the correct charge - It is advisable to make a complete sketch of the installation of refrigerant, check the values of superheat and subcooling, including the location of the unit and all the components circuit by circuit, with the system running at full capacity.
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Page 24: Safety Elements
(red LED on) and all the outlets will be deactivated WARNING: Operation of the unit on improper line voltage when unit power is supplied. constitutes abuse and is not covered by the Carrier warranty. NOTE 2 : IMPORTANT: To ensure the correct power supply, it is necessary The thermostat cables should be separate from any 220 V or to first determine the cable section. -
Page 25: Electrical Connection
The following should only be used as a guideline, and es as possible (bends etc.) to minimise pressure losses. does not make Carrier in any way liable. If there may be a risk of poor operation, adequate measures (design, position, protection) must be taken to prevent this. -
Page 26: Start-Up
REFRIGERANT PIPE SIZING 15 - START-UP WITH REFRIGERANT (Cont.) 15.1 - Preliminary checks 14.3 - Suction pipe sizing Never be tempted to start the unit without reading fully, and understanding, the operating instructions and without having This sizing is the most critical. A distillation process takes carried out the following pre-start checks: place in the evaporator, during which the refrigerant evapo- rates until it reaches a balance point. -
Page 27: Major System Components
16 - MAJOR SYSTEM COMPONENTS 16.6 - Refrigerant 16.1 - Compressors 38RM-N units operate with refrigerant R-410A. 38RM-N units use hermetic scroll compressors. Each com- pressor is equipped with a crankcase oil heater, as standard. 16.7 - High-pressure safety switch Each compressor sub-function is equipped with: •... -
Page 28: Start -Up Checklist For 38Rm-N Units (Use For Job File)
17 - Start -up checklist for 38RM-N Units (use for job file) Preliminary information Job name:........................................ Location:......................................... Installing contractor:..................................... Distributor:......................................Start-up preformed by:............... Date: ....................Equipment Model 38RM-N:................S/N....................Compressors Circuit A Circuit B 1. Model No................... 1. Model No................Serial No. -
Page 29: Safety Considerations
18 - SAFETY CONSIDERATIONS - Check for proper fan rotation. Before connecting the refrigerant lines carefully follow the steps below: Refrigerant guidelines for R-410A: - Remove the freon holding charge from the refrigerant Refrigerant R-410A consists of a non-azeotropic blend of 50% circuits. - Page 30 SAFETY CONSIDERATIONS (Cont.) Description of unit protection devices START-UP The unit includes the following unit protection devices: Actual start-up should only be done under the supervision of - Internal compressor protector to avoid overheating. a qualified refrigeration mechanic. The operation of the - Short-cycle protection (included in the main electronic control is explained in the instructions accompanying each board).
- Page 31 SAFETY CONSIDERATIONS (Cont.) Installation of Field Cable Instructions for connecting electrical supply cables on site for central air conditioning units: • A suitable copper main feed cable must be selected for the electrical loads of the unit. It conforms to IEC60227 standard. •...
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Page 32: Start-Up Check List
19 - START-UP CHECK LIST Start up date: ..............Equipment sold by: ....................... Contract No: ............Installed by: ........................Contract No: ............Site address: ........................................... Equipment type and serial No: 38RM-N ............................... ELECTRICAL DATA: Supply voltage Ph 1: ......Volts Ph 2: .... -
Page 33: Installation & Commissioning Check List
20 - INSTALLATION & COMMISSIONING CHECK LIST Installa�on & Commissioning Check list for Commercial product lines Installa�on Date: Start Up date: Unit Model: Unit Code: Serial no.: Ac�on IS the unit solidly mounted and levelled? IS the installa�on loca�on adequate? Space for duc�ng Space for Maintenance work Noise and vibra�on... -
Page 34: General Maintenance
21 - GENERAL MAINTENANCE ATTENTION: Before starting any servicing or maintenance 21.1.2 - Preliminary advice operation on the unit, make sure that the power supply has been disconnected. A current discharge could cause personal injury. Keep the unit clean. - Keep the space surrounding the unit clean and cleared in In order to obtain maximum performance from the unit order to avoid accidents and ensure the proper ventilation special attention should be paid to the following points:... -
Page 35: Standard Maintenance
• Check the status of the contactors, disconnect switches HVAC unit nul and void, and the manufacturer, Carrier • Check the presence and the condition of the electrical SCS, will no longer be held responsible. - Page 36 STANDARD MAINTENANCE (Cont.) Compressor repleacement 22.4 - Condenser coil In the case of compressor replacement: - Disconnect the unit from power supply. We recommend, that finned coils are inspected regularly to - Completely empty the load of refrigerant using a specific check the degree of fouling.
- Page 37 - Where a leakage detection system has been installed the criteria will render the guarantee conditions for the HVAC frequency of checks is halved. unit nul and void, and the manufacturer, Carrier SCS, will no Note: These machines use R410A. It is essential that techni- longer be held responsible.
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Page 38: Troubleshooting Chart
23 - TROUBLESHOOTING CHART A list of possible faults, as well as the probable cause and suggested solutions is shown in below table. In the event of a unit malfunc- tion it is recommended to disconnect the power supply and ascertain the cause. Table -Troubleshooting chart Symptom Cause... - Page 39 TROUBLESHOOTING CHART (Cont.) Symptom Cause Solution Evaporation pressure too low a) Low flow in evaporator. Air recircula- a) Verify the air circuits (flow, filter clean- (low pressostat cut-off ) tion liness...) b) Frozen evaporator b) Verify freezing protection c) Liquid line as different temperatures at c) Replace filter filter inlet and outlet d) Gas lack...
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Page 40: Final Shutdown
24 - FINAL SHUTDOWN Shutting down Separate the units from their energy sources, allow them to cool then drain them completely. Recommendations for disassembly Use the original lifting equipment. Sort the components according to their material for recycling or disposal, in accordance with regulations in force. Check whether any part of the unit can be recycled for anoth- er purpose. - Page 41 Notes : ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
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- Page 45 Safety Management System www.miraco.com.eg Carrier is committed for continuous improvement of Carrier products according to national and international standards to ensure the highest quality and reliability standards, and to meet market regulations and requirements. All specifications subject to change without prior notice according to Carrier policy of continuous development.