48/50HG014---028, 48/50PG20---28 Single---Package Rooftop Units

with COMFORTLinkt and Electro---Mechanical Controls Return and Supply Smoke Detectors Accessory

Installation Instructions

PART NO. CRSMKDET001D00, CRSMKSUP001B00, CRSMKSEN001A00

TABLE OF CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . 1 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Check Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Return Air Smoke Detector Installation . . . . . . . . . . . . . . . 2 Supply Air Smoke Detector Installation . . . . . . . . . . . . . . . 5 Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Configuring the ComfortLinkt Controller . . . . . . . . . . . . 8 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Recommended Service Schedule . . . . . . . . . . . . . . . . . . . . 9 Sensor Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Controller Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Dirty LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Power LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Trouble LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

IMPORTANT: There are two different design revision 48/50HG units that have been produced. Because of these differences, there are two different versions of this accessory. This accessory literature covers accessories manufactured for units with design revision 1. This revision designator is found in the 13th digit of the unit model number located on the units’ rating plate. Design revision 0 units are not covered in this accessory book.

To determine the design revision, refer to the full unit model number. See Fig. 1 for an example of an HG model number. The design revision number in the model number nomenclature is located in position 13.

DESIGN REVISION NUMBER

Position No.

1

2

3

4

5

 

6

7

8

 

9

 

10

11

12

13

14

15

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Example:

4

8

H

G

D

0

1

6

 

A

A

C

6

 

1

 

1

 

A

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C07172

Fig. 1 ---Model Number Chart

GENERAL

An HVAC (heating, ventilation and air-conditioning) system supplies conditioned air to virtually every area of a building. Smoke introduced into this air duct system will be distributed throughout the entire building. Smoke detectors designed for use inside the unit are used to sense the presence of smoke passing through the unit.

The smoke detector utilizes photoelectric technology for the detection of smoke. This detection method, when combined with an efficient ducting design, samples air passing through the unit. If sufficient smoke is sensed, an alarm signal is initiated and the ComfortLink controls will shut down the unit. With the unit shut down, the unit will not blow toxic smoke and fire gases throughout the areas served by the duct system.

The return air smoke detector is part number CRSMKDET001D00, which includes a Smoke Sensor and a Smoke Control Module combined with sampling tube, harnesses and hardware. The supply air smoke detector is part number CRSMKSUP001B00, which includes a Smoke Sensor and a Smoke Control Module combined with sampling tube, harnesses and hardware. Part number CRSMKSEN001A00 is a Smoke Sensor only for use as a second (Supply with existing Return, or Return with existing Supply) Air Smoke Detector with sampling tube, harnesses and hardware.

The Control Module can be attached to a Smoke Sensor and installed as an assembled unit, or it can be installed separate from a sensor. One Controller can be used to control up to two detectors (Smoke Sensors).

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use care when handling and installing the accessory.

Recognize safety information. This is the safety-alert symbol

. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.

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Carrier 48/50HG014-028, 48/50PG20-28 installation instructions Table of Contents, General, Safety Considerations
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48/50PG20-28, 48/50HG014-028 specifications

The Carrier 48/50HG014-028 and 48/50PG20-28 are part of Carrier's extensive lineup of commercial and industrial HVAC systems, designed for optimal performance, energy efficiency, and reliability. These units are particularly known for their robust construction and advanced technology, making them suitable for a variety of applications, including large commercial buildings, manufacturing centers, and other facilities that require consistent climate control.

One of the key features of the Carrier 48/50HG units is their high-efficiency scroll compressors, which not only enhance performance but also significantly reduce energy consumption. These compressors are designed to maintain efficiency across a wide range of operating conditions, providing reliable cooling and heating year-round. Additionally, the units are equipped with advanced microprocessor controls that allow for precise temperature regulation and system diagnostics, optimizing energy use and simplifying maintenance.

The 48/50HG and 48/50PG models also boast a compact design, making installation easier, especially in spaces with limited access. Their lightweight construction and modular components enable quick and efficient service, an essential feature for businesses that cannot afford prolonged downtimes. The units come with a comprehensive range of factory-installed options, including variable-speed fans and advanced economizer systems that increase indoor air quality while reducing operational costs.

Noise reduction technology is another significant characteristic of these units. They are designed with sound-dampening features that minimize operational noise, which is particularly beneficial for urban environments or noise-sensitive applications. In addition, the units meet or exceed standard regulatory requirements for efficiency and emissions, further enhancing their appeal in an increasingly eco-conscious market.

Moreover, the Carrier 48/50HG and 48/50PG series incorporate environmentally friendly refrigerants with low Global Warming Potential (GWP), aligning with Carrier's commitment to sustainability. This approach not only complies with current environmental regulations but also prepares users for future mandates regarding refrigerant use.

In conclusion, the Carrier 48/50HG014-028 and 48/50PG20-28 series are engineered to deliver exceptional performance, energy efficiency, and reliability. Their combination of advanced technologies, ease of maintenance, and commitment to sustainability makes them a top choice for businesses seeking effective climate control solutions. With a focus on innovation and customer satisfaction, Carrier continues to set the standard in the HVAC industry.
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