Carrier 48/50PG20-28, 48/50HG014-028 installation instructions Supply and Return Sensor Tube

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CRSMK

10.Mount the sampling tube support bracket to the cross member with two 1/4AB-14 5/8-in. screws (P/N AL48AM307) as shown in Fig. 5. Insert large snap bushing (P/N HY93NH085) into hole in bracket.

11.Slide sampling tube into bracket. (See Fig. 4.) Pull the sampling tube so that the locking collar snaps into the smoke detector.

12.Attach smoke detector to partition using two, 8-18 3/4-in. pan head screws (P/N AL56AU168).

!CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

Do not overtighten the screws.

13.Replace the unit side panel.

14.Install the snap bushing (P/N HY93NH069) in the center knockout underneath the control terminal strips located in the bottom right-hand corner of the control box.

15.Feed wires through snap bushing and connect to appropri- ate terminals as shown in Fig. 6 for ComfortLinkt units or Fig. 7 for Electro-Mechanical units.

NOTE: This step is not needed with 48/50PG Humidi-MiZertunits because they have plug 19 harness already installed in the control box. The harness assembly part number 50TG403507 that came with the accessory is not used. Factory installed PL-19 can be located outside the contol box by its appropriate label. For Humidi-MiZer smoke detector wiring refer to Fig. 8.

16.Connect PL-19 from the smoke detector control module to the PL-19 on the control box harness installed in Step 15.

NOTE: On 48PG Humidi-MiZer units the control box harness has a jumper plug attached. This needs to be disconnected so PL-19 from the smoke detector can be snaped in.

17.

Restore power to the unit.

 

18.

Configure ComfortLink controller as specified in

Con-

 

figuring the ComfortLink Controller.

 

19.Perform Sensor and Controller tests. At a minimum, the Magnet test should be performed to verify smoke detector wiring.

20.Replace smoke detector cover.

21.Check for alarms. Correct any problems.

INSTALL SUPPLY SENSOR TUBE

WITH HOLES POINTING

UP

INSTALL RETURN SENSOR TUBE

WITH HOLES POINTING

DOWN

INSTALL RETURN EXHAUST

TUBE HERE

BRACKET BUSHING

C07175

Fig. 4 ---Supply and Return Sensor Tube

4

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Contents Safety Considerations Table of ContentsGeneral Check Package Contents InstallationReturn Air Smoke Detector Installation CRSMKDET001D00 Smoke Detector Supply and Return Sensor Tube Supply Air Smoke Detector Installation CRSMKSUP001D00 Sampling Tube Support BracketSmoke Detector Wiring on Electro-Mechanical Control Units Sensor Installation CRSMKSEN001A00 Make sure sampling tube holes are aligned facing UPConfiguring the ComfortLinkt Controller OperationMaintenance Recommended Service ScheduleCleaning Procedure Sensor TestsTroubleshooting Power LEDDirty LED Trouble LED

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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