6.Slide the sampling tube collar over the sampling tube until the tabs lock into the tube.

7.Slide sampling tube into smoke detector with eight slots.

Make sure sampling tube holes are aligned facing UP.

8.Insert plug into far end of the sampling tube.

9.Place rubber gaskets over each sampling tube on smoke detector. (See Fig. 2.)

10.Remove one knockout from top of smoke detector.

11.Insert one end of RJ-45 wire harness through knockout and wire to smoke detector as shown in Fig. 10.

12.Slide smoke detector into holes in fan side plate with

the terminal block at the top and secure using two, 8-18 3/4-in. pan head screws (P/N AL56AU168). Replace cover.

!CAUTION

EQUIPMENT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

Do not overtighten the screws.

13.Attach cable to fan side plate using snap-in wire ties. See Fig. 9 for clarification. Secure to center post.

14.Secure cable to back side of cable tray using three snap-in wire ties.

15.In the Electrical/Compressor section, install snap bushing

in the center knockout underneath the terminal strips lo- cated in the bottom right-hand corner of control box.

16.Connect wires to terminal strips 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.

17.Remove cover from control module and remove knockout from side of module nearest the RJ-45 connector.

18. Using three 8-18 3/4-in. pan head screws (P/N AL56AU168) screws, secure control module to com- pressor partition above compressor B1/A2 location.

19.Connect PL-19 from control module to PL-19 from wir- ing harness installed in Step 16.

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 snapped in.

20.Route cable from supply smoke sensor, along the outside of the control box, through the control module knockout and connect to the J1 RJ-45 connector.

21.Using wire ties, secure the wiring so it does not interfere with unit operation.

22.Replace control module cover.

23.Restore power to the unit.

24.Configure ComfortLink controller as specified in Config- uring the ComfortLink Controller below.

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

26.Turn off power to the unit.

27.Reconnect the indoor fan plug and the limit switch wires if applicable.

28.Close the indoor fan section door.

29.Restore power to the unit and check for alarms. Correct any problems encountered.

30.Close Electrical/Compressor section door.

Sensor Installation (CRSMKSEN001A00)

When adding return smoke sensor to previously installed supply smoke detector:

1.Open electrical/compressor section access door/panel.

2.Disconnect PL-19 from control module to terminal strip by separating plug connectors.

3.Remove control module cover. Disconnect supply sensor RJ-45 wire from control module.

4.Remove three screws attaching control module to com- pressor partition and save screws for later use.

5.Remove control module from unit.

6.Slide feet of control module into receptacle on the return sensor housing and secure from the backside using one screw removed in Step 4. The J1 RJ-45 connector on sen- sor should be nearest the control module. Knockout holes should align. (See Fig. 11.)

7.Route short RJ-45 wire from J1 connector of sensor, through knockout holes, and connect to J1 connector of control module.

8.Follow steps 2-20 of instructions for installing return smoke detector.

IMPORTANT: Step 15 requires connecting the supply smoke sensor RJ-45 wire to connector J2 in the control module.

When adding supply smoke sensor to previously installed return smoke detector:

Follow steps 1-14 and 19-29 from supply smoke detector installation instructions.

CRSMK

7

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Carrier 48/50HG014-028 Sensor Installation CRSMKSEN001A00, Make sure sampling tube holes are aligned facing UP
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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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