Carrier 48EZ-A installation instructions Small Curb

Page 5

 

 

 

B

HVAC unit

HVAC unit

C

 

base rails

basepan

 

 

 

Sealing

 

 

 

Gasket

 

 

 

Roofcurb

 

H

 

 

 

Anchor screw

Wood nailer*

F A

 

Flashing field

 

 

 

supplied

Roofcurb*

 

 

 

Insulation

 

 

Roofing material

(field supplied)

 

 

 

 

 

field supplied

 

 

E

 

 

 

Cant strip

 

 

D

field supplied

 

 

 

 

 

SMALL CURB

A09418

*Provided with roofcurb

A09090

ROOF CURB DETAIL

B

C

G

H

F A

E

D

 

 

LARGE CURB

 

A09415

 

 

 

 

 

 

 

 

 

 

 

 

A09419

 

 

 

 

 

 

 

 

 

 

UNIT SIZE

CATALOG

A

B

C

D

E

F

G

H

NUMBER

IN. (mm)

IN. (mm)*

IN. (mm)

IN. (mm)

IN. (mm)

IN. (mm)

IN. (mm)

IN. (mm)

 

 

 

 

 

 

 

 

 

 

 

Small

CPRFCURB010A00

11 (279)

10 (254)

 

 

32.4 (822)

 

30.6 (778)

 

 

 

 

 

 

 

CPRFCURB011A00

14 (356)

16 (406)

47.8

2.7 (69)

46.1 (1170)

 

 

 

 

 

 

 

 

(1214)

 

 

Large

CPRFCURB012A00

11 (279)

14 (356)

43.9

42.2 (1072)

 

 

 

 

 

 

 

(1116)

 

 

CPRFCURB013A00

14 (356)

 

 

 

 

 

 

 

 

 

 

 

NOTES:

1. Roof curb must be set up for unit being installed.

2. Seal strip must be applied, as required, to unit being installed.

3. Roof curb is made of 16-gauge steel.

4. Attach ductwork to curb (flanges of duct rest on curb).

5. Insulated panels: 1-in. (25.4 mm) thick fiberglass 1 lb. density.

IMPORTANT: Do not install large base pan HYBRID HEAT

literature dimensional drawing to ensure that “Y” is greater than 14

units onto the small base pan (common curb). The center of gravity

in. (356 mm). Do not install any large base pan unit onto the

on a large base pan HYBRID HEAT unit could overhang the curb

common curb with a “Y” dimension (center of gravity) less than 14

causing an unsafe condition. Before installing any large base pan

in. (356 mm).

unit onto the common curb, check the “Y” distance in the product

Fig. 4 - Roof Curb Dimensions

48EZ -- A

5

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Contents Safety Considerations Table of ContentsIntroduction Receiving and InstallationCheck Equipment Provide Unit Support48EZ-A24-36 Unit Dimensions 48EZ-A42-60 Unit Dimensions Small Curb Provide Clearances Rig and Place UnitPersonal Injury or Property Damage HazardInstall Gas Piping Install Flue HoodConnect Condensate Drain InspectionSediment Trap Fire or Explosion HazardUnit Size 48EZ Physical Data Unit 48EZ-AHeating Inputs Physical Data Unit 48EZ-A Cont’dMaximum Gas Flow Capacity Configuring Units for Downflow Vertical Discharge Install Duct ConnectionsAlternate Method Unit Component Damage HazardSupply Duct Panels Special Procedures for 208-V Operation Install Electrical ConnectionsHigh-Voltage Connections Control Voltage ConnectionsPRE-START-UP Balance Point Setting-Thermidistat or Hybrid ThermostatTransformer Protection FIRE, EXPLOSION, Electrical Shock HazardSTART-UP Start-up Heating and Make Adjust- mentsCheck for Refrigerant Leaks Unit Sequence of OperationCheck Heating Control Adjust Gas InputCheck Gas Input Unit Damage HazardLimit Switches Airflow and Temperature RiseRollout Switch Check Burner FlameChecking and Adjusting Refrigerant Charge Start-up Cooling and Make Adjust- mentsIndoor Airflow and Airflow Adjustments Checking Cooling Control OperationGas Heating Fan Speed Set-up Two Cooling Fan Speeds Set-up Dehumidification feature usedContinuous Fan Operation Color Coding for Indoor Fan Motor Leads48EZ-A Wet Coil Pressure Drop IN. W.C Filter Pressure Drop Table IN. W.C741 638 547 415 Heating Low Blue 1234 1168 1093 1021 961 894 825 759 687 Heating Low Blue 1736 1695 1642 1601 1553 1512 1465 1427 1381 65oF Heating 1927 1893 1858 1824 1791 1759 1720 1689 1640 65oF Heating 48EZ a 208/230-3-60 Wiring Diagram, Unit 48EZ-A Cooling Charging Table-Subcooling Cleaning the Blower Motor and Wheel MaintenanceAir Filter Indoor Blower and MotorInduced Draft combustion air Blower Assembly Limit SwitchBurner Ignition Main BurnersRefrigerant Circuit Electrical Controls and WiringOutdoor Fan Loss of Charge Switch Pressure SwitchesGas Input Indoor AirflowExplosion Hazard High-Pressure SwitchCopeland Scroll Compressor Puron Refrigerant Compressor Oil Unit Operation and Safety HazardRefrigerant System Puronr R-410A Quick Reference Guide TroubleshootingSTART-UP Checklist Symptom Cause Remedy Troubleshooting Guide Cooling or Heat Pump Heating ModeTroubleshooting Guide-LED Error Codes Troubleshooting Guide-HeatingRemove and Store in Job Files TemperaturesPreliminary Information Model no III. START-UP Electrical Supply Voltage Compressor AmpsCatalog No 48EZ---06SI
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48EZ-A specifications

The Carrier 48EZ-A and 48VT-A are two advanced rooftop unit air conditioners that exemplify innovation and efficiency in HVAC technology. Designed for commercial applications, these units provide optimal comfort while ensuring energy conservation and reliability.

One of the standout features of the Carrier 48EZ-A is its high-efficiency cooling system. With SEER ratings reaching up to 16, this model uses advanced compressor technology to ensure that energy consumption stays low while maximizing cooling output. The 48EZ-A incorporates a two-stage scroll compressor that enhances performance during partial load conditions, making it ideal for varying temperature demands throughout the day.

Meanwhile, the Carrier 48VT-A is designed with variable speed technology that allows for precise modulation of airflow and cooling capacity, adapting seamlessly to real-time building conditions. This technology not only improves comfort but also significantly reduces energy usage by optimizing operational efficiency.

Both units are equipped with advanced microprocessor controls that facilitate superior management of the HVAC system. The controls offer programmable options allowing for enhanced control over system operation, scheduling, and diagnostics. This promotes easy maintenance and ensures long-term reliability.

In terms of construction, the Carrier 48EZ-A and 48VT-A units are built with corrosion-resistant materials, ensuring durability and longevity even in challenging environments. The cabinet is designed with insulated panels to minimize sound levels, making them suitable for installation in noise-sensitive locations.

Moreover, both models are equipped for easy installation and serviceability. The logical wiring design and access ports streamline maintenance, reducing downtime and optimizing overall performance. Additionally, they feature an energy-efficient fan design that maximizes airflow while minimizing energy use.

In summary, the Carrier 48EZ-A and 48VT-A rooftop units stand out in the HVAC market for their energy efficiency, advanced technology, and durable construction. These features make them ideal choices for various commercial applications where comfort, efficiency, and reliability are paramount. The combination of high-performance components and user-friendly features positions these models as leaders in modern HVAC solutions.
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