Carrier 38HDR018-060, 38HDF018-036 specifications Cap, Ccht, Gnd, Hps, Lps, Ofm

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LEGEND

 

C

— Contactor, Compressor

Terminal (Marked)

CAP

— Capacitor

 

CCHT

— Crankcase Heater Thermostat

Terminal (Unmarked)

CH

— Crankcase Heater

 

COMP — Compressor Motor

Terminal Block

EQUIP — Equipment

 

GND

— Ground

Splice

HPS

— High-Pressure Switch

Factory Wiring

LPS

— Low-Pressure Switch

Field Control Wiring

OFM

— Outdoor-Fan Motor

OL

— Overload

Field Power Wiring

TB

— Terminal Board

Optional or Accessory Wire

TRAN — Transformer

 

Splice (Field)

38HDF OPERATION SEQUENCE

CALL FOR COOLING:

1.Control voltage from transformer to thermostat (24 v).

2.At thermostat 24 v is switched to “G” and “Y.”

3.24 v from thermostat “G” energizes fan relay at indoor fan coil unit and indoor-fan motor runs.

4.24 v from thermostat “Y” energizes the contactor coil and the compressor and outdoor-fan motor will both

run.

6.If the internal protection of the compressor or LPS or HPS open, the 24 v to contactor coil will be inter- rupted. The compressor and outdoor-fan motor will stop.

NOTES:

1.Compressor and fan motors are thermally protected.

2.Wire in accordance with National Electrical Code (NEC) and local codes. Replace any original wires with 90° C wire or its equivalent.

3.Use minimum 60° C wire for field power wiring.

4.Transformer has internal 4.5A thermal fuse on the primary side.

5.Transformer factory wired for 230 v. For 208 v move black wire to 208 volt tap on transformer.

6.Crankcase heater and thermostat used on selected models only.

Fig. 6 — 38HDF018-036 Typical Wiring Schematic

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Contents Installation, Start-Up Service Instructions 38HDF,HDR Unit Dimensions Lifting Unit with Sling Rig and Mount Unit38HDF018-036 Physical Data Unit 38HDR 38HDR018-060 Physical DataTypical Control Circuit Connections Make Electrical Connections38HDF Electrical Data 38HDR 38HDR Electrical DataCcht CAPGND HPSCLO CompEquip Condenser-Fan Mounting Positions Preliminary ChecksRefrigerant Charging Pressure Temperature Psig Pressure vs. Temperature Chart Puron Refrigerant R-410ARequired Liquid Line Liquid Pressure Temperature F LubricationSubcooling Charging Table Troubleshooting the Cooling Cycle Copyright 2006 Carrier Corporation

38HDR018-060, 38HDF018-036 specifications

Carrier is a renowned name in HVAC technology, and their 38HDR018-060 and 38HDF018-036 models showcase the fine craftsmanship and innovation typical of the brand. These rooftop units are designed to deliver reliable heating and cooling solutions, making them an ideal choice for commercial spaces and industrial applications.

One of the main features of the Carrier 38HDR and 38HDF series is their ability to provide efficient climate control. The units are equipped with high-efficiency scroll compressors, which ensure reduced energy consumption while maintaining optimal performance. This efficiency translates into significant cost savings on energy bills, making these units an environmentally conscious choice as well.

In terms of design, the 38HDR and 38HDF models boast a rugged construction that can withstand various weather conditions. They are built with a galvanized steel cabinet that resists corrosion, ensuring durability and longevity. The compact design of these rooftop units allows for easy installation and integration into existing structures, offering flexibility for building owners and operators.

Advanced technology is at the heart of these Carrier units. The inclusion of a microprocessor-based control system enables precise temperature management and system monitoring. This technology not only optimizes performance but also provides valuable data for maintenance planning, ultimately reducing the risk of unexpected failures.

The units also come with variable air volume capabilities, which enhances comfort by allowing for customizable airflow to meet specific environmental needs. The 38HDR and 38HDF series is designed to be compatible with multiple zoning systems, allowing facilities to better adapt to changing occupancy and usage patterns.

With sound levels minimized through advanced acoustic engineering, these rooftop units operate quietly, ensuring minimal disruption to occupants. This is especially important in commercial settings, where a peaceful environment is crucial to productivity.

Moreover, both series support enhanced indoor air quality features. With the option for advanced filtration systems, they can effectively remove airborne contaminants, contributing to a healthier indoor environment.

In summary, Carrier's 38HDR018-060 and 38HDF018-036 rooftop units are a powerful combination of efficiency, durability, and advanced technology. Their ability to provide customized heating and cooling solutions makes them an excellent investment for any commercial or industrial application, ensuring comfort and performance for years to come.
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