Table 9 Ð Power Exhaust Default Set Points

STAGE

OFFSET

DIFFERENTIAL

OFF VOLTAGE

ON VOLTAGE

OFF STATIC PRESSURE

(in. wg)

 

 

 

 

 

1

50%

3%

6.0

6.3

0.00

2

55%

3%

6.5

6.8

0.06

3

60%

3%

7.0

7.3

0.12

4

64%

3%

7.4

7.7

0.18

 

 

 

 

 

 

Table 10 Ð DIP Switch Con®guration

SETTING

1

2

3

4

5

6

7

8

 

 

 

 

 

VAV Ð

 

 

 

 

 

VAV Ð Space Sensor

 

 

Occupied

Time Guard Override

 

 

 

 

Installed

 

 

Heat

ON

 

 

OPEN

VAV

 

Expansion

Field Test

Enabled

 

Gas Heat

Heat Pump

 

Board

ON

CV Ð

IN CONJUNCTION

Operation

 

 

 

 

 

 

CV Ð CCN or Sensors

 

 

Modulated

WITH FIELD TEST

 

 

 

 

Used

 

 

Power

Ð Set Minimum

 

 

 

 

 

 

 

Exhaust

Damper Position

 

 

 

 

 

 

 

VAV Ð

 

 

 

 

 

VAV Ð No Space Sensor

 

 

Occupied

 

 

 

 

 

 

 

Heat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Base Control

Field Test

Disabled

Time Guard Override

 

Air Conditioner

CLOSED

CV

 

CV Ð

Electric Heat

 

Board Only

OFF

OFF

Operation

 

 

 

Constant

 

 

 

 

 

 

 

 

 

 

 

CV Ð Thermostat

 

 

Volume

 

 

 

 

 

 

 

 

Power

 

 

 

 

 

 

 

 

Exhaust

 

 

 

LEGEND

CCN Ð Carrier Comfort Network

CV Ð Constant Volume

VAV Ð Variable Air Volume

NOTES:

1.The OPEN side of the DIP switch is marked ``OPEN.'' When the rocker switch is on the ``OPEN'' side of the switch, the switch is OPEN.

2.The con®guration of DIP switches 2 and 5 are dependent on DIP switch 1. If DIP switch 1 is set to OPEN (VAV operation), then DIP switches 2 and 5 will con®gure VAV functions.

3.When the unit is ®eld-tested (DIP switch 4 to OPEN), the function of DIP switch 6 changes and it is used to set the minimum damper position.

Table 11 Ð DIP Switch Factory Settings

UNIT

1

2

3

4

5

6

7

8

48EJ,EW

Closed

Closed

Closed

Closed

Closed

Closed

Open

Closed

48EK,EY

Open

Closed

Closed

Closed

Closed

Closed

Open

Closed

34

Page 34
Image 34
Carrier EK, 48EJ, EW, EY024-048 Power Exhaust Default Set Points, DIP Switch Conguration, DIP Switch Factory Settings

EW, EY024-048, EK, 48EJ specifications

The Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY024-068 are cutting-edge rooftop air conditioning units designed for commercial applications. These models are renowned for their reliability, energy efficiency, and innovative technologies aimed at providing optimal indoor comfort.

One of the standout features of these units is their advanced cooling and heating capabilities. They employ a multi-stage compressor system that allows for precise temperature control, accommodating various load requirements. This flexibility is particularly beneficial in commercial settings where the cooling load can fluctuate throughout the day.

Energy efficiency is paramount in today’s environmental landscape, and Carrier has ensured that these models meet stringent efficiency standards. They incorporate high-efficiency scroll compressors, which significantly reduce energy consumption while delivering powerful performance. The units are also equipped with variable speed fans that adjust airflow based on demand, further optimizing energy use.

In terms of construction, these rooftop units feature a robust design that enhances durability and longevity. The cabinet is constructed to withstand harsh weather conditions, ensuring reliable performance year-round. Additionally, the units are equipped with corrosion-resistant coatings, particularly useful in coastal environments where salt exposure can be a concern.

The Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY models utilize advanced controls and connectivity features, allowing for easy integration into building management systems. This connectivity enables remote monitoring and control, facilitating quick response to changing conditions and simplifying maintenance tasks.

Noise reduction is another key characteristic of these models. They are designed with sound-absorbing insulation and low-noise fan blades to ensure quiet operation, making them suitable for noise-sensitive environments such as schools and hospitals.

These units are also available with various options for air filtration and dehumidification. The use of high-efficiency air filters enhances indoor air quality by trapping dust, pollen, and other airborne particles. Enhanced dehumidification capabilities ensure that spaces remain comfortable even in humid conditions.

In conclusion, the Carrier 48EJ, 48AW, 48EK, 48AJ, and 48EY024-068 rooftop units are engineered to offer exceptional performance, energy efficiency, and durability. With their advanced technologies and user-friendly features, they stand out as reliable solutions for meeting diverse commercial cooling and heating needs, making them a popular choice for many businesses.