APPENDIX D - ADDITIONAL START-UP DATA

Table 60 — Air Quantity Limits (50PD Units)

UNIT

COOLING (cfm)

HEATING (cfm)

50PD

OPTIONAL ELECTRIC HEAT

 

 

05

1200

2000

1200

2000

06

1500

2500

1500

2500

Table 61 — Air Quantity Limits (48PD Units)

UNIT

COOLING (cfm)

HEATING (cfm)

48PD

Min

Max

Min

Max

05 (Low Heat)

1200

2000

600

1680

05 (Med Heat)

1200

2000

940

2810

05 (High Heat)

1200

2000

1130

2820

06 (Low Heat)

1500

2500

940

2810

06 (Med Heat)

1500

2500

1130

2820

06 (High Heat)

1500

2500

1510

2520

Table 62 — Evaporator Fan Motor Specifications - 48/50PD

48/50PD

DRIVE

VOLTAGE/PHASE

EFFICIENCY

MAX BHP

MAX AMPS

05 & 06

Low & High

208/230---3ph

0.80

2.0

6.4

460---3ph

0.80

2.0

3.2

 

 

48/50PD

NOTES:

1.Extensive motor and electrical testing ensures that the motors can be utilized with confidence up to the maximum applied bhp, watts, and amps. Using the fan motor up to the maximum ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

2.Convert bhp to watts using the following formula:

watts =

bhp (746)

motor efficiency

 

3.The EPACT (Energy Policy Act of 1992) regulates energy requirements for specific types of indoor-fan motors. Motors regulated by EPACT include any

general purpose, T-frame (three-digit, 143 and larger), single-speed, foot mounted, polyphase, squirrel cage induction motors of NEMA (National Electrical Manufacturers Association) design A and B, manufactured for use in the United States. Ranging from 1 to 200 Hp, these continuous-duty motors operate on 230 and 460 volt, 60 Hz power. If a motor does not fit into these specifications, the motor does not have to be replaced by an EPACT-compliant energy-efficient motor. Variable-speed motors are exempt from EPACT compliance requirements. Therefore, the indoor-fan motors for Carrier 48/50PG03-14 units are exempt from these requirements.

Table 63 — Fan Rpm at Motor Pulley Settings* - 48/50PD

UNIT

DRIVE

 

 

 

 

MOTOR PULLEY TURNS OPEN

 

 

 

 

48/50PD

0

1/2

1

11/2

 

2

21/2

3

 

31/2

4

41/2

5

 

 

 

05

Low

910

878

847

815

 

784

753

721

 

690

659

627

596

High

1173

1139

1104

1070

 

1035

1001

966

 

932

897

863

828

 

 

 

06

Low

978

949

920

891

 

863

834

805

 

776

748

719

690

High

1261

1227

1194

1161

 

1128

1095

1062

 

1028

995

962

929

 

 

 

*Approximate fan rpm shown, based on 1725 rpm motor. NOTE: Factory speed setting is at 5 turns open.

Table 64 — Accessory/FIOP Pressure Drop (in. wg) - 48/50PD

AIRFLOW

ELECTRIC

ECONOMIZER

ECONOMIZER

(CFM)

HEAT

(Vertical)

(Horizontal)

600

0.01

0.01

0.03

800

0.01

0.01

0.05

1000

0.02

0.02

0.07

1200

0.02

0.03

0.10

1400

0.03

0.04

0.14

1600

0.04

0.06

0.17

1800

0.05

0.07

0.22

2000

0.07

0.09

0.26

2200

0.08

0.11

0.31

2400

0.10

0.13

0.37

2600

0.11

0.15

0.43

2800

0.13

0.18

0.49

3000

0.15

0.21

0.56

100

Page 100
Image 100
Carrier 48/50PD05 manual Appendix D Additional START-UP Data

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.