Carrier 48EN Installation, Operation And Maintenance Instructions

Contents

Carrier 48EN Installation, Operation And Maintenance Instructions Manual pdf 3 page image

Packaged rooftop unitswith integrated gas burner31. INTRODUCTION2. OPERATION LIMITSThe 48EN/EH cooling units and heat pumps are autonomous air-airunits with a compact monoblock, horizontal rooftop design with a builtin natural or propane gas burner (in accordance with the gas Directive90/396 EEC).They are equipped with centrifugal and axial fans, air coils, hermeticscroll compressors and electronic control with microprocessor,components optimised for the R-410A refrigerant.These units have been designed for the air conditioning of large surfaceareas used for business or industry in areas with particularly low outdoortemperatures in winter.A vast number of options meet numerous operating demands thusenabling quick installation and reliable operation. Space 48EN SeriesAutonomous air-air cooling units with a compact horizontal rooftopdesign with a built in gas burner. Space 48EH SeriesAutonomous reversible air-air heat pump units with a compacthorizontal rooftop design with a built in gas burner.After manufacturing, all units are charged with refrigerant andare tested at the factory, verifying the correct operation of alltheir components.In this brochure are described the actions and safety norms for acorrect unit handling. With a condensation pressure control operating down to -10ºC. With high powered axial fan operating up to 52ºC. With outdoor temperatures below -15ºC it is compulsory to select the anti-freezeprotection option for the electric panel.Inlet air conditions Cooling HeatingIndoor coilheat pumpMinimum 14ºC WB 10ºCMaximum 22ºC WB 27ºCOutdoor coilheat pumpMinimum 12ºC  -10ºC WBMaximum 48ºC  15ºC WBGas Burner Minimum -- -30ºC 