Carrier NP034-074 specifications Model no Serial no Date Technician, Supply Voltage L1-L2

Page 72

 

 

START-UP CHECKLIST

MODEL NO.:

 

SERIAL NO.:

 

 

DATE:

 

 

TECHNICIAN:

 

PRE-START-UP:

VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

LOOSEN ALL SHIPPING HOLDDOWN BOLTS AND REMOVE SHIPPING BRACKETS PER INSTRUCTIONS VERIFY INSTALLATION OF ECONOMIZER HOOD

VERIFY INSTALLATION OF EXHAUST HOOD

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

CHECK GAS PIPING FOR LEAKS (48 SERIES UNITS ONLY)

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 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(48 SERIES UNITS ONLY)

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRIC HEAT SUPPLY AIR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(IF UNIT IS SO EQUIPPED)

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PRESSURES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS INLET PRESSURE (48 SERIES UNITS ONLY)

 

 

 

 

 

 

 

 

 

 

 

 

IN. WG

 

 

 

 

 

 

GAS MANIFOLD PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(48 SERIES UNIT ONLY)

VALVE NO. 1

 

 

 

 

 

 

 

 

 

 

 

IN. WG

 

 

 

VALVE 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 USING CHARGING CHARTS ON PAGES 47-49

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. 564-818

Printed in U.S.A.

Form 48/50D,N-9SI

CL-1

3-96

Replaces: 48DJ,DK-3SI;

Tab

1a

1b

 

 

 

 

 

 

48/50NB,NP-1SI; 50DJ,DK-9SI

 

 

 

 

 

 

 

 

 

 

 

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

Page 71 Page 72
Image 72
Page 71 Page 72
Contents Installation, Start-Up Service Instructions Contents GeneralRigging Label Ð Physical Data 034, 044 Units Ð Physical Data 054-074 Units Operating Weights of Options and Accessories Weight Distribution and Center of GravityÐ Roof Curb 034, 044 Units Ft-inÐ Roof Curb 054-074 Units DegÐ Condenser Section Roof Curb 054-074 Units Only 054,064 270 105¤8 074 255 101¤16Install Outdoor Hoods Outdoor-Air Inlet AdjustmentsEconomizer Settings Unit Sizes 034Unit Size Weight Ð Base Unit Dimensional Drawing 50DJ,DK,NP034,044 Units 8700 3946 5969 19-7 6717 Ð Base Unit Dimensional Drawing 50DJ,DK,NP054-074 Units Weight Ft-inDrain Location Selection Approx Deg AT 50% RHField Wire Routing Field Electrical ConnectionsField Power Wiring Connections Electrical Data, 034 Units 90.8 110 10.0 15.2 96.4 125 15.0 22.0 103.2 11.0 81.2 10093.8 110 10.0 15.2 99.4 125 15.0 22.0 106.2 10.0 14.0 84.2 11073.6 10.0 12.2 78.0 100 15.0 18.0 83.8 65.875.6 10.0 12.2 80.0 100 15.0 18.0 85.8 67.8Electrical Data, 044 Units 106.5 125 10.0 15.2 112.1 15.0 22.0 118.9 150 11.0 96.9 125109.5 125 10.0 15.2 115.1 15.0 22.0 121.9 150 10.0 14.0 99.9 12584.1 110 10.0 12.2 88.5 15.0 18.0 94.3 76.3 10086.1 110 10.0 12.2 90.5 15.0 18.0 96.3 10.0 11.0 78.3 100Electrical Data, 054 Units 10.0 15.2 144.8 175 15.0 22.0 151.6 200 20.0 28.0 157.6 15.0 21.0 129.6 17510.0 15.2 150.8 200 15.0 22.0 157.6 20.0 28.0 163.6 20.0 27.0 135.6 17510.0 12.2 116.5 150 15.0 18.0 122.3 20.0 22.0 126.3 15.0 17.0 104.3 12510.0 12.2 121.5 150 15.0 18.0 127.3 20.0 22.0 131.3 20.0 22.0 109.3 125Electrical Data, 064 Units 10.0 15.2 160.8 200 15.0 22.0 167.6 20.0 28.0 173.6 15.0 21.0 145.6 17510.0 15.2 166.8 200 15.0 22.0 173.6 20.0 28.0 179.6 225 20.0 27.0 151.6 20010.0 12.2 126.8 150 15.0 18.0 132.6 20.0 22.0 136.6 175 15.0 17.0 114.6 15010.0 12.2 131.8 150 15.0 18.0 137.6 175 20.0 22.0 141.6 20.0 22.0 119.6 150Electrical Data, 074 Units 10.0 15.2 182.0 225 15.0 22.0 188.8 250 20.0 28.0 194.8 15.0 21.0 166.8 22510.0 15.2 188.0 250 15.0 22.0 194.8 20.0 28.0 200.8 20.0 27.0 172.8 22510.0 12.2 146.0 175 15.0 18.0 151.8 200 20.0 22.0 155.8 15.0 17.0 133.8 17510.0 12.2 151.0 200 15.0 18.0 156.8 20.0 22.0 160.8 20.0 22.0 138.8 175Field Control Thermostat Wiring Field Wiring for Building Pressurization and Smoke Purge Installing Flue/Inlet Hoods 48 Series Units Only Gas Piping DetailsFlue Hood PRE-START-UP Gas Manifold Pressure 48 Series Units Only Ð Field-Supplied Evaporator-Fan Pulley Data, 034,044 UnitsÐ Field-Supplied Evaporator-Fan Pulley Data, 054-074 Units Air Quantity Limits cfmInitial Check GeneralHEATING, Units Without Economizer Service CompressorsLiquid Service VALVES, Filter DRIERS, and Sight Glasses Power Exhaust MOTORS, PULLEYS, and BeltsEVAPORATOR-FAN MOTORS, PULLEYS, and Belts Burner Section Detail 48 Series Units Only Modulating Power Exhaust Damper Motor LubricationAdjustments Belt Installation and TensioningCondenser FAN Adjustment Pulley Alignment Charging Chart, 044 Units System One Condenser Fan Running Charging Chart, 064 Units System All Condenser Fans Running Auxiliary Switch Stroke Adjustment Main Burner Removal 48 Series Units OnlyProtective Devices Compressor ProtectionElectric Heat 50 Series Units Only Gas Heat 48 Series Units OnlyEconomizer Motor Checkout Economizer Control Board Checkout TestDetailed Check Control Board Component Arrangement Page Compressor Lockout Connections ACC Gas Heat Sections 48DJ,NP034,044 Units Gas Heat Sections 48DJ,NP054-074 Units Gas Heat DK034,044 Units Gas Heat DK054-074 Units Typical Wiring Schematic 48/50DJ,50DW Units 054-074 Shown Typical Wiring Schematic 48/50DJ,50DW Units 054-074 Shown Typical Wiring Schematic 48/50DK,50DY Units 054-074 Shown Typical Wiring Schematic 48/50DK,50DY Units 054-074 Shown Page Page Page Page Packaged Service Training Page OUTDOOR-AIR Temperature RETURN-AIR TemperatureModel no Serial no Date Technician Supply Voltage L1-L2

NP034-074 specifications

The Carrier NP034-074 is an advanced rooftop unit designed for commercial heating, ventilation, and air conditioning (HVAC) applications. This unit is part of Carrier’s extensive range of rooftop units that are known for their energy efficiency, reliability, and innovative features. The NP034-074 series is particularly recognized for its robust performance in diverse environmental conditions, making it ideal for a variety of commercial building types.

One of the standout features of the NP034-074 is its high-efficiency compressor. Equipped with a scroll compressor, the unit offers enhanced performance and quieter operation compared to traditional reciprocating compressors. This design not only improves energy efficiency but also reduces operating costs over time. The unit is designed to meet or exceed the latest efficiency standards, ensuring that businesses can enjoy optimal indoor comfort while keeping energy consumption low.

The NP034-074 also integrates advanced control technologies that provide users with greater flexibility and ease of operation. The intuitive control system allows for precise temperature management and can be easily integrated with building automation systems. This enables users to monitor and adjust settings remotely, ensuring consistent and efficient climate control throughout the facility.

Another key characteristic of the NP034-074 is its robust construction. Built to withstand various weather conditions, the unit features a galvanized steel cabinet with a powder-coated finish for corrosion resistance. Its design also facilitates easy access for maintenance and service, which minimizes downtime and operational interruptions.

In terms of air distribution, the NP034-074 incorporates a powerful blower system that ensures even and effective airflow throughout the space. This design improves indoor air quality by enhancing ventilation while maintaining comfort levels. Additionally, the unit can be customized with options such as economizers and variable speed fans to optimize performance based on specific building needs.

The NP034-074 is a versatile and reliable choice for businesses looking to enhance their HVAC systems. With its combination of energy efficiency, advanced technology, and robust construction, this rooftop unit stands out as a top choice for commercial climate control solutions.
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