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Related Manuals for Carrier 48EN
Summary of Contents for Carrier 48EN
- Page 1 M A I N T E N A N C E I N S T R U C T I O N S Packaged rooftop cooling only / heat pumps with integrated gas burner 48EN/EH Nominal cooling capacity 58,9 - 135,5 kW Nominal heating capacity 62,2 - 143,4 kW...
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Page 2: Table Of Contents
Operating principle ......................................9 Control of the gas burner ....................................10 8. Safety elements ......................................11 Safety devices in the gas burner ..................................11 Safety devices in the 48EN/EH unit ................................12 9. Checking before commissioning ..................................13 Electrical Connections .....................................13 Gas Burner ........................................13 Air ducts connections ......................................15 Checks in the axial fans ....................................15... -
Page 3: Introduction
1. I NTRODUCTION The 48EN/EH cooling units and heat pumps are autonomous air-air After manufacturing, all units are charged with refrigerant and units with a compact monoblock, horizontal rooftop design with a built are tested at the factory, verifying the correct operation of all in natural or propane gas burner (in accordance with the gas Directive their components. -
Page 4: Technical Characteristics
Packaged rooftop units with integrated gas burner 3. T ECHNICAL CHARACTERISTICS 48EN/EH 58,9 72,1 82,7 60,3 73,6 84,8 101,7 110,3 123,3 135,5 Cooling capacity (kW) Cooling 21,4 28,1 32,7 21,1 27,5 32,0 33,0 37,0 42,8 49,8 Power input... -
Page 5: General Recommendations
- Communications brochure for the CARRIERrtc electronic control (in Caution: Before intervening in the unit, verify that the main case the 48EN/EH unit is connected to a pLAN network or to a BMS power to the unit is cut off. An electric shock can cause monitoring system). -
Page 6: Refrigerant Safety
Packaged rooftop units with integrated gas burner Refrigerant safety 5. T RANSPORT A periodical check must be performed for refrigerant gas leaks as per The unit must be handled with care to avoid transport damage. Thus Regulation (CE) Nº842/2006 over certain greenhouse effect fl uoride we recommend: gases. -
Page 7: Gravity Centre
Total dB(A) 1085 2353 2500 Note: The sound power spectrums can be consulted in the technical brochure MA / MC0 1186 2469 2766 for the 48EN/EH series. 1024 2300 2459 Sound pressure level 1085 2353 2557 Measurement conditions: in free fi eld, measured at a distance of 5... -
Page 8: Anchorage For Antivibrators
Packaged rooftop units with integrated gas burner Anchorage for antivibrators Reactions in the supports (kg) Weight 48EN/ Assembly (mm) (mm) (kg) When selecting antivibration mounts both the unit weight and reactions 1545 2095 100 1497 in the supports must be taken in account and are featured in the... -
Page 9: Gas Burner
Packaged rooftop units with integrated gas burner 7. G URNER Operating principle Connection / disconnection of the burner Flue When heating is required (A), the burner remote control starts the working cycle of the modulation board which activates the fl ame control device. This device starts up the burner combustion air fan (A), thus starting an air current in the combustion chamber for a preset period of time. -
Page 10: Control Of The Gas Burner
To establish the electric power supply of the unit (wire intake, conductor section and their calculations, protections, etc.), Burner remote control refer to the information provided in the technical catalogue for the 48EN/EH units, the wiring diagram included with On/Off N.O. N.C. -
Page 11: Safety Elements
The F2 blocking can be triggered when the safety thermostat bulb detects an excessive temperature in the inlet air to the burner. The following fi gure shows the position of the aforementioned bulb: Supply of air from the 48EN/EH unit Flame control device... -
Page 12: Safety Devices In The 48En/Eh Unit
Packaged rooftop units with integrated gas burner Safety devices in the 48EN/EH unit Low pressure pressostat Condensation and evaporation pressure control When connected to the compressor suction, it This safety element, integrated in the control, enables managing the will stop its operation when the pressure at that... -
Page 13: Checking Before Commissioning
Packaged rooftop units with integrated gas burner 9. C HECKING BEFORE COMMISSIONING Note: Under no circumstance should the unit be started without having read the brochure completely. Electrical Connections In order to establish the unit's electric power supply (cable inlet, Connection of the outlet temperature probe: calculation of the lead section, protection devices etc.), refer to: In order to guarantee the correct measurement of the outlet air... - Page 14 Packaged rooftop units with integrated gas burner - With regard to the gas supply: - With regard to the collection of condensates: These units are equipped with a junction for draining the burner The burner module includes the following elements: solenoid valves, condensates drain pan.
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Page 15: Air Ducts Connections
Packaged rooftop units with integrated gas burner The following fi gure shows the gas burner connections: - No matter the type of ducts type to use, they must not be composed of materials that propagate fi re nor expel toxic gases in the event of a fi... -
Page 16: Condensate Drain Connection
Packaged rooftop units with integrated gas burner Condensate drain connection - Before commissioning, check the blade rotation direction and that the axis turns without strokes nor vibrations. All the models are equipped with CONNECT SIPHON - Once running, check the operation conditions: pressures, fl ows and a junction for the draining of the METTRE SIPHON consumptions. -
Page 17: Starting The Unit
- Air recirculation in the unit, originated by some obstacle in the air - Check the unit operation and verify the safety elements. aspiration or outlet. - All the 48EN/EH models are - Noise problems because of excessive air fl ow in the grille. SCROLL COMPRESSOR. -
Page 18: Options
48EN/EH series. Filters All model types can substitute the fi ltering mesh that the units include regularly with G4 rating, mounted on the same frames. Also, creased opacimetric F6 to F9 rating fi... -
Page 19: Maintenance
Packaged rooftop units with integrated gas burner 12. M AINTENANCE The minimal maintenance operations and their periodicity will be made Air fi lters according to the national regulations. - Clean usually. Depending on the installation conditions, the fi lter aspect must be examined to defi ne the cleaning periodicity. Any intervention on the electric cooling components must be made by a qualifi... - Page 20 CARRIER could not - In the case of the presence of acid, water or metallic particles, replace accept liability.
- Page 21 Packaged rooftop units with integrated gas burner 2. The smoke discharge ducts and the air inlet 6. The inlet pressure of the gas valve Check the condition of the ducts by looking inside or using suitable Check that the valve inlet pressure corresponds to that required for tools.
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Page 22: Control And Analysis Of Breakdowns
Packaged rooftop units with integrated gas burner 13. C ONTROL AND ANALYSIS OF BREAKDOWNS Symptom Cause Solution Evaporation pressure very high in relation with a) Load excess a) Collect refrigerant the air inlet b) High air temperature b) Verify overheating c) Compressor suction not air tight c) Verify compressor state and replace d) Cycle reversing valve in middle position... - Page 24 Order No.: 10051, 03.2015. Supersedes order No.: New Manufactured for CARRIER in Spain. The manufacturer reserves the right to change the specifi cation without prior notice. Printed in the European Union.