Carrier 48MA/50ME016-040 Pre-Start-Up, Model no Serial no Date Technician, Supply Voltage L1-L2

Page 48

 

 

START-UP CHECKLIST

MODEL NO.:

 

SERIAL NO.:

 

 

DATE:

 

 

TECHNICIAN:

 

PRE-START-UP:

VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTRUCTIONS

VERIFY INSTALLATION OF ECONOMIZER HOOD

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

CHECK GAS PIPING FOR LEAKS (48MA)

CHECK THAT INDOOR-AIR FILTER IS CLEAN AND IN PLACE

VERIFY THAT UNIT IS LEVEL

CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SET SCREW IS TIGHT

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

START-UP

ELECTRICAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUPPLY VOLTAGE L1-L2

 

 

 

 

 

L2-L3

 

 

 

 

 

 

 

 

L3-L1

 

 

 

 

 

 

 

 

 

COMPRESSOR AMPS Ð COMPRESSOR NO. 1

L1

 

 

 

 

 

 

 

 

L2

 

 

L3

 

Ð COMPRESSOR NO. 2

L1

 

 

 

 

 

 

 

 

L2

 

 

L3

 

SUPPLY FAN AMPS

 

 

 

 

 

EXHAUST FAN AMPS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRIC HEAT AMPS (50ME, IF APPLICABLE)

 

 

L1

 

 

 

 

 

 

 

 

 

L2

 

 

L3

TEMPERATURES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTDOOR-AIR TEMPERATURE

 

 

 

 

F

 

 

DB (Dry-Bulb)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RETURN-AIR TEMPERATURE

 

 

 

 

 

 

 

 

F

 

 

DB

 

 

 

 

 

 

 

 

 

F WB (Wet-Bulb)

 

 

 

 

 

 

 

 

COOLING SUPPLY AIR

 

 

 

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS HEAT SUPPLY AIR (48MA)

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRIC HEAT SUPPLY AIR (50ME, IF APPLICABLE)

 

 

 

 

 

 

 

 

 

F

 

 

 

 

 

 

 

 

PRESSURES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS INLET PRESSURE (48MA)

 

 

 

 

 

IN. WG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS MANIFOLD PRESSURE (48MA)

STAGE NO. 1

 

 

 

 

IN. WG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

STAGE NO. 2

 

 

 

 

 

 

IN. WG

 

 

 

 

 

 

 

 

REFRIGERANT SUCTION

CIRCUIT NO. 1

 

 

 

 

 

 

 

 

 

 

 

 

PSIG

 

 

 

CIRCUIT NO. 2

 

 

 

 

 

 

PSIG

REFRIGERANT DISCHARGE

CIRCUIT NO. 1

 

 

 

 

 

 

 

 

 

 

 

 

PSIG

 

 

 

CIRCUIT NO. 2

 

 

 

 

 

 

PSIG

VERIFY REFRIGERANT CHARGE

GENERAL

ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS

Copyright 1996 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book

1

1

 

PC 111

Catalog No. 564-840

Printed in U.S.A.

Form 48MA/50ME-3SI

Pg CL-1

4-96

Replaces: 48MA/50ME-1SI

Tab

1c

1d

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE

Image 48
Contents Installation, Start-Up Service Instructions ContentsSafety Considerations InstallationBase Unit Physical Data and Dimensions 48MA Units Base Unit Physical Data and Dimensions 50ME Units Removing Shipping Shields Fig Roof Curb DetailPhysical Data Roof Curb Physical Data and Dimensions 48MA Units Roof Curb Physical Data and Dimensions 50ME Units Shipping Shield Locations Units Shown Suggested Gas Piping 48MA Unit 48MA Electrical Data Unit 50ME Electrical Data Unit 50ME Electrical Application Data Field Control Wiring ECTZone Control Board Component Location Cooling Cooling Stage 1 Ð First stage of modules 1, 2, Cooling Stage 1 Ð First stage of modules 1, 2, 3, Cooling Stage 1 Ð Modules 1 and 3 Stage 2 Ð Modules 2 Cooling Modules Setting Stage 1 Ð First stage of modules 1 Cooling Stage 1 Ð First stage of modules 1, 2, Cooling 50ME Two-Stage Heat, One-Stage Cool Ð 4 Module Joint Control Cooling Stage 1 Ð Modules 1 and 3 Stage 2 Ð Modules 2 Cooling Modules Setting HA1 HA2 START-UP APSGas Heat Lighting Procedure 48MA AdjustmentPressure Adjustment Natural GAS MGVSpoiler Screw Location Units with 2-ELEMENT Heaters Units with 3-ELEMENT HeatersService Air¯ow SwitchesCabinet Panels and Grilles Condenser and OUTDOOR-AIR Cooling CoilsCompressor Capacity Control Unloaders Head Pressure ControlTo ADD or Remove OIL LOW ChargeCondenser Fans Evaporator Fans and MotorFAN Shaft Bearing Removal Forced-Draft Blower 48MA Optional Economizer Ð See FigPulley Removal OperationEconomizer and Exhaust Damper Assemblies, Exploded View Page Page Packaged Service Training Page OUTDOOR-AIR Temperature RETURN-AIR TemperaturePRE-START-UP Model no Serial no Date Technician

48MA/50ME016-040 specifications

The Carrier 48MA/50ME016-040 series represents a significant advancement in the field of commercial HVAC systems, designed to provide reliable, efficient, and effective climate control solutions for various applications. These units are widely recognized for their durability and performance, making them a top choice for building owners and managers seeking optimal comfort and energy efficiency.

One of the main features of the Carrier 48MA/50ME series is its advanced scroll compressor technology. The scroll compressors are known for their reliability and efficiency, which leads to reduced energy consumption and lower operating costs. This high-efficiency design not only contributes to significant energy savings but also minimizes noise levels, enhancing the overall comfort of the environment.

The units are equipped with a unique microprocessor-based control system that offers precise temperature control and flexibility. This technology allows for easy integration with building management systems, enabling users to monitor and control their HVAC systems remotely, thereby optimizing performance and energy use. The programmable thermostats help to tailor the operation of the units to meet the specific needs of the users, ensuring maximum comfort at all times.

In addition to its robust performance features, the Carrier 48MA/50ME series also boasts a comprehensive line of options for customization. These options include various cooling capacities ranging from 16 to 40 tons, allowing the equipment to cater to different building sizes and requirements. The series is also designed with a compact footprint, making it suitable for rooftop installations where space is at a premium.

Another important characteristic of the series is its environmentally friendly refrigerant options. Carrier prioritizes the use of refrigerants with low global warming potential, contributing to a more sustainable approach to HVAC solutions. This commitment to environmental responsibility not only complies with regulations but also meets the increasing demand for greener technologies.

Furthermore, the robust construction of the Carrier 48MA/50ME series ensures long-lasting performance in even the harshest conditions. The units are designed to withstand various environmental factors, making them ideal for both commercial and industrial applications. Overall, the Carrier 48MA/50ME016-040 series stands out as a reliable choice for efficient and effective heating and cooling solutions, equipped with innovative technologies that prioritize performance, sustainability, and user comfort.