48/50PD

Table 19 — MBB Connections

DISPLAY

POINT DESCRIPTION

 

SENSOR LOCATION

TYPE OF I/O

CONNECTION

NAME

 

PIN NUMBER

 

 

 

 

 

 

 

INPUTS

 

 

 

 

Input power from TRAN1

 

control box

24 VAC

J1, 1

---3

 

IGC Fan Request

 

gas section

switch input

J6,

4

FDWN

Fire shutdown switch

 

supply/return/space

switch input

J6,

6

HUM

Space Humidity switch

 

space

switch input

J7,

4

 

Digital Scroll Unloader

 

 

switch input

J7,

6

C.ALM

Scroll Compressor Alarm

 

 

switch input

J7,

8

CMP.A

Compressor A Feedback

 

 

switch input

J7, 10

FIL.S

Filter status switch

 

indoor fan section

switch input

J9, 2

---3

CS.A1

Compressor A1 Current Sensor

 

control box

0---5vdc digital input

J9, 10

---12

SPT

Space temperature (T55/56)

 

space

10k thermistor

J8, 1

---2

SPTO

Space temperature offset (T56)

 

space

10k thermistor

J8, 2

---3

OAT

Outdoor air temperature

 

outdoor coil support

10k thermistor

J8, 5

---6

SAT

Supply air temperature

 

indoor fan housing, or

10k thermistor

J8, 7

---8

 

supply duct

 

 

 

 

 

 

SCT.A

Saturated condenser temperature, circuit A

 

outdoor coil, circuit A

5k thermistor

J8, 9---10

RAT

Return air temperature

 

Return air Section

10k thermistor

J8, 13

---14

FAN.S

Fan status switch

 

indoor fan section

switch input

J8, 15

---16

SSP.A

Suction pressure, circuit A

 

compressor A suction

0---5 VDC pressure

J8, 18

---20

 

transducer

 

 

 

 

 

 

 

 

 

OUTPUTS

 

 

 

CTLR

Digital Scroll Ctrl Pwr

 

 

relay

J10,

11

CCH

Crankcase heat relay

 

 

relay

J10,

13

OFC.1

Outdoor fan 1 relay

 

 

relay

J10,

19

IDF

Indoor fan VFD pwr relay

 

 

relay

J10,

21

ALRM

Alarm relay

 

 

relay

J10,

23

HT.1

Heat Stage 2 relay

 

 

relay

J10,

25

HT.2

Heat Stage 1 relay

 

 

relay

J10,

27

 

 

 

COMMUNICATION

 

 

 

 

Local Equipment Network (LEN)

 

 

communication

J5, 1

---3

 

Carrier Comfort Network (CCN)

 

 

communication

J5, 5

---7

 

Network device power

 

 

24 VAC

J5, 9---10

 

Scrolling Marquee Display (LEN)

 

 

communication

J4, 1

---3

 

Scrolling Marquee Display power

 

 

24 VAC

J4, 5

---6

 

Modulation Board (AUX1) LEN

 

 

communication

J3, 1

---3

 

Optional ECB power

 

 

24 VAC

J2, 1

---2

48

Page 48
Image 48
Carrier 48/50PD05 manual MBB Connections, Fil.S

48/50PD05 specifications

The Carrier 48/50PD05 is a remarkable addition to Carrier's lineup of rooftop units, offering advanced cooling and heating solutions for commercial applications. Designed for medium-sized buildings, this unit is well-suited for both new installations and as a replacement for older systems, thanks to its versatile features and efficient performance.

One of the standout features of the 48/50PD05 is its energy efficiency. It incorporates state-of-the-art technology to achieve high Seasonal Energy Efficiency Ratios (SEER) and EER ratings, reducing operational costs while delivering superior comfort. The unit is also compliant with the latest energy regulations, making it an environmentally friendly choice for building owners concerned about sustainability.

The 48/50PD05 is equipped with a highly efficient scroll compressor, which not only enhances performance but also contributes to quiet operation. This is a significant advantage in commercial spaces where noise levels need to be kept in check for comfort and productivity. Additionally, the unit includes advanced airflow design, ensuring even distribution of conditioned air throughout the space.

Technologically, the Carrier 48/50PD05 features Carrier's Infinity Control system, which allows for precise control of indoor climate. This intelligent control mechanism can be integrated with smart building management systems, enabling users to monitor and manage energy use effectively. Wi-Fi connectivity is also available, providing remote access for real-time adjustments and diagnostics.

Durability is another characteristic of the 48/50PD05. Constructed with high-quality materials, the unit withstands various environmental conditions, ensuring longevity and reliability. Moreover, the modular design facilitates easy maintenance, making service procedures efficient and cost-effective.

In addition to cooling, the Carrier 48/50PD05 offers heating capabilities, often utilizing gas or electric heating options that can be tailored to the specific needs of a building. The unit can also be equipped with integrated economizers, allowing for free cooling during suitable outdoor conditions, further enhancing energy savings.

Overall, the Carrier 48/50PD05 stands out as a high-performance HVAC solution that combines efficiency, technology, and durability. It provides building owners with a versatile tool to ensure comfort while minimizing their environmental footprint. With a strong emphasis on energy savings and advanced control features, this rooftop unit is a smart investment for any commercial property.