Carrier 38HD Duct Free and Ducted Condensing Units Manual

Page 1

38HDF018-036 Duct Free Condensing Units 38HDR018-060 Ducted Condensing Units

Installation, Start-Up and

Service Instructions

CONTENTS

Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Step 1 — Complete Pre-Installation Checks . . . . . . 1

UNPACK UNIT

INSPECT SHIPMENT

CONSIDER SYSTEM REQUIREMENTS

MATCHING THE CONDENSING UNIT TO AN INDOOR UNIT

Step 2 — Rig and Mount Unit. . . . . . . . . . . . . . . . . . . . . 3

MOUNTING ON GROUND

MOUNTING ON ROOF

RIGGING

Step 3 — Complete Refrigerant Piping

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

CHECK ACCURATER CONTROL

FILTER DRIER

MAKE PIPING SWEAT CONNECTORS

PROVIDE SAFETY RELIEF

Step 4 — Make Electrical Connections . . . . . . . . . . . 6

CONTROL CIRCUIT WIRING

POWER WIRING

CONNECTIONS TO DUCT-FREE FAN COIL UNITS

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . .14,15

SAFETY CONSIDERATIONS

Installing and servicing air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install or service air conditioning equipment.

Untrained personnel can perform basic maintenance, such as cleaning and replacing filters. All other operations should be performed by trained service personnel. When working on air conditioning equipment, observe safety precautions in litera- ture, tags, and labels attached to unit.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly. Consult local building codes and the National Electrical Code (NEC) for special installation requirements.

Before installing or servicing system, always turn off main power to system. There may be more than one disconnect switch. Turn off accessory heater power if applicable. Elec- trical shock can cause serious personal injury.

Puron® (R-410A) refrigerant systems operate at higher pressures than standard R-22 systems. Do not use R-22 ser- vice equipment or components on Puron refrigerant equip- ment. If service equipment is not rated for Puron refrigerant, equipment damage or personal injury may result.

INSTALLATION

Step 1 — Complete Pre-Installation Checks

UNPACK UNIT (See Fig. 1) — Move the unit to final loca- tion. Remove unit from carton, being careful not to damage service valves and grilles.

Fig. 1 — 38HDF,HDR Unit

INSPECT SHIPMENT — File a claim with the shipping company if shipment is damaged or incomplete. Check unit nameplate to ensure unit matches job requirements.

CONSIDER SYSTEM REQUIREMENTS — Consult local building codes and NEC for special installation requirements.

Allow sufficient space for airflow clearance, wiring, refrig- erant piping, and servicing unit. See Fig. 2.

Locate unit so that condenser airflow is unrestricted on both sides. Refer to Fig. 2.

Unit may be mounted on a level pad directly on base legs or mounted on raised pads at support points. See Fig. 2 for center of gravity.

MATCHING THE CONDENSING UNIT TO AN INDOOR UNIT — The 38HDF,HDR units can be matched to a corresponding indoor unit. The 38HDF018-036 units can be matched with an in-ceiling cassette or high wall indoor unit. The 38HDR unit can be matched with under-ceiling and resi- dential fan coils. Refer to separate indoor unit literature for more information.

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

Book

1

4

Catalog No. 02-38HD0001-SI

Printed in U.S.A.

Form 38HD-4SI

Pg 1

1-06

Replaces: 38HDC-3SI

Tab

3e

2f

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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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 HPSComp CLOEquip Condenser-Fan Mounting Positions Preliminary ChecksRefrigerant Charging Pressure Temperature Psig Pressure vs. Temperature Chart Puron Refrigerant R-410ALubrication Required Liquid Line Liquid Pressure Temperature FSubcooling 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.