48/50P2,P3,P4,P5030-100 Low Ambient Operation MOTORMASTER® V Control Accessory 50/60 Hz

Installation Instructions

Part Numbers: CRLOWAMB033A00 THROUGH CRLOWAMB038A00

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Step 1 — Install Field-Fabricated Wind Baffles . . . 3

Step 2 — Mounting and Electrical Connections for Motormaster® V Control . . . . . . . . . . . . . . . . . . . . 5

Step 3 — Configure Motormaster V Control . . . . . 11

Step 4 — Test Motormaster V Control . . . . . . . . . . . 11

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 13-15

SAFETY CONSIDERATIONS

Installation, start-up, and servicing of this equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service technicians should install, start up, and service this equipment.

When working on this equipment, observe precautions in the literature and on tags, stickers, and labels attached to the equipment and any other safety precautions that may apply.

WARNING

Open all remote disconnects before servicing this equip- ment. Electrical shock could result in personal injury.

GENERAL

This book contains instructions for the installation, start-up, and service of the Motormaster V (MMV) control on 48/50P030-100 units.

The Motormaster V control is a motor speed control device which adjusts condenser fan motor speed in response to varying liquid refrigerant pressure. A properly applied Motormaster V control extends the operating range of air-conditioning systems and permits operation at lower outdoor ambient temperatures.

To operate these units at very low ambient temperatures, Mo- tormaster V controls (Fig. 1) must be added. Field-fabricated and installed wind baffles are also required for units in areas with pre- vailing winds of more than 5 mph (8 kph) and where tempera- tures drop below 32 F (0° C). The Motormaster V control permits operation of the unit to an ambient temperature of –20 F (–29 C). The control regulates the speed of one or two 3-phase fan motors depending on unit size. Replacement of the fan motor on most units is not necessary since the control is compatible with the factory-installed fan motors. To verify that unit fan motors are compatible with the control see Table 1.

See Tables 2-4 for the Motormaster V control accessory pack- age usage and contents. Field wiring of control is required.

Table 1 — Replacement Motor Part Numbers

48/50P2,P3,P4,P5 UNIT SIZE

VOLTAGE

ACCESSORY PART NUMBER

 

208/230-3-60

Not Required, Std Unit Motor

035

400-3-50, 460-3-60

Not Required, Std Unit Motor

575-3-60

Not Required, Std Unit Motor

 

 

380-3-60

HD56AK380

 

208/230-3-60

HD52AK002

030, 040-060

400-3-50, 460-3-60

HD52AK002

575-3-60

Not Required, Std Unit Motor

 

 

380-3-60

Not Required, Std Unit Motor

 

208/230-3-60

HD52AK002 (2 Required)

070

400-3-50, 460-3-60

HD52AK002 (2 Required)

575-3-60

Not Required, Std Unit Motor

 

 

380-3-60

Not Required, Std Unit Motor

 

208/230-3-60

Not Available

075-100

400-3-50, 460-3-60

HD52AK002 (2 Required)

575-3-60

Not Required, Std Unit Motor

 

 

380-3-60

Not Available

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53480070-01

Printed in U.S.A.

Form 48/50P-2SI

Pg 1

9-09

Replaces: New

Page 1
Image 1
Carrier 48/50P2, 48/50P4, 48/50P3, 48/50P5030-100 installation instructions Contents, Safety Considerations, General

48/50P5030-100, 48/50P3, 48/50P2, 48/50P4 specifications

The Carrier 48/50P5030-100, 48/50P4, 48/50P3, and 48/50P2 series represent a range of highly efficient air conditioning and heating solutions developed by Carrier. Designed for commercial and industrial applications, these units combine advanced technology with robust features to deliver reliable performance and comfort.

One of the standout features of the Carrier 48/50P series is their energy efficiency. These units are equipped with high-efficiency compressors and fans that optimize energy use while maintaining superior cooling and heating capabilities. The models often meet or exceed ASHRAE efficiency standards, providing significant energy savings over traditional systems. This makes them not only cost-effective over their lifespan but also a responsible choice for energy-conscious businesses.

The 48/50P5030-100 model is notable for its ability to deliver precise temperature control, thanks to its sophisticated microprocessor control panel. This control system allows for easy adjustments and provides valuable diagnostic information, ensuring operational reliability and maintenance efficiency. The advanced controls also support variable-speed technology, which adjusts the system’s output based on real-time demands, enhancing both comfort and energy savings.

In terms of construction, these units are designed for durability. With a rugged, weather-resistant cabinet and high-quality components, they can withstand harsh environmental conditions, making them suitable for a variety of settings. The units typically include high-efficiency filters that improve indoor air quality by reducing airborne particles and allergens.

Another key characteristic of the Carrier 48/50P series is their versatility. These units can be configured for various applications, including rooftop installations and ground-mounted setups. Their modular design allows for easy integration into existing systems, accommodating different space requirements while providing optimal performance.

Carrier also emphasizes noise reduction in the design of these units, incorporating sound-dampening technologies that minimize operational noise. This is particularly valuable in environments where quiet operation is essential, such as schools and offices.

Overall, the Carrier 48/50P5030-100, 48/50P4, 48/50P3, and 48/50P2 series represent a commitment to quality, efficiency, and innovation in climate control solutions. With their advanced features, energy-saving technologies, and robust design, these models are well-suited to meet the diverse needs of modern commercial and industrial facilities. Carrier continues to lead the industry by integrating cutting-edge technology with a focus on performance and sustainability, ensuring that their systems provide long-term comfort and efficiency.