48MPD,MPE62L-10R 50MP62L-10R Single Package Electric Cooling Units

and Gas Heating/Electric Cooling Units With Product Integrated Controls

Installation, Start-Up and Service

Instructions

CONTENTS

 

Page

GENERAL

2

SAFETY CONSIDERATIONS

2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unit Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Slab Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Field-Fabricated Ductwork . . . . . . . . . . . . . . . . . . 3

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . 3

Condensate Coil Shipping Covers . . . . . . . . . . 3

Install Outdoor Hoods . . . . . . . . . . . . . . . . . . . . . . 3

Make Electrical Connections . . . . . . . . . . . . . . . . 14

· POWER SUPPLY

Field Electrical Connections . . . . . . . . . . . . . . . . 14

· POWER WIRING

Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

·SENSORS

·HUMIDITY CONTROL AND HOT WATER AND STEAM VALVES

·SPACE TEMPERATURE SENSOR (T55)

·SPACE TEMPERATURE SENSOR (T56) (CV Applications Only)

·SPACE TEMPERATURE AVERAGING

·HEAT INTERLOCK RELAY (VAV Units Only Ð Not Necessary For DAV Applications)

·OPTION AND ACCESSORY CONTROL WIRING

Carrier Comfort Network Interface . . . . . . . . . . 23

Air Pressure Tubing . . . . . . . . . . . . . . . . . . . . . . . . 24

Gas Piping (48 Series Units Only) . . . . . . . . . . . . 26

Installing Flue/Inlet Hoods

(48MP Units Only) . . . . . . . . . . . . . . . . . . . . . . . . . 26

Fan Isolator Adjustment . . . . . . . . . . . . . . . . . . . . 27

Check Compressor Mounting . . . . . . . . . . . . . . . 27

Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 27

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-38

System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Evaporator-Fan Belts, Pulleys,

and Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Controls Con®guration and Quick Test . . . . . . 35

·SUPPLY FAN STATUS SWITCH (FS)

·CHECK FILTER SWITCH (CFS)

·ENTHALPY CONTROL SET POINT

·KEYPAD AND DISPLAY MODULE (HSIO) CONFIGURATION

·SET UNIT TYPE

·ENTER JOB SET POINT VALUES

·CONFIGURE UNIT CONTROLS AND FUNCTIONS

·QUICK TEST FUNCTION

Page

Gas Pressure Check . . . . . . . . . . . . . . . . . . . . . . . . 38

Check Supply Fan Rotation . . . . . . . . . . . . . . . . . 38

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-42

Initial Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Operating Sequences . . . . . . . . . . . . . . . . . . . . . . 39

·SUPPLY FAN

·ECONOMIZER

·COOLING (All Units)

·OCCUPIED COOLING

·UNOCCUPIED COOLING

·OVERRIDES

·ADAPTIVE OPTIMAL START

·ADAPTIVE OPTIMAL STOP (CV Applications Only)

·GAS HEATING, OPERATION (48MP Units Only)

Control Loop Checkout . . . . . . . . . . . . . . . . . . . . . 41

IAQ Control Loop Adjustment . . . . . . . . . . . . . . . 42

Lead/Lag Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 42-45

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

·PROCESSOR MODULE NO. 1

·PROCESSOR MODULE NO. 2

·HIGH-VOLTAGE RELAY MODULES (DSIO)

·KEYPAD AND DISPLAY MODULE (HSIO)

Default Set Points/Changing Set Points . . . . . 43 Motor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Variable Frequency Drive (VFD) . . . . . . . . . . . . . 43

· DISPLAY AND KEYPAD

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45-55 Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

·UNIT CONTROL BOX

·COMPRESSORS

·LIQUID SERVICE VALVES, SOLENOID VALVES, FILTER DRIERS, AND SIGHT GLASSES

·EVAPORATOR-FAN MOTORS, PULLEYS, AND BELTS

·POWER EXHAUST MOTORS, PULLEYS, AND BELTS

·GAS HEAT SECTION

·UNIT CONTROL BOX

·ECONOMIZER DAMPER MOTORS

·RETURN-AIR FILTERS

·CONDENSER FANS AND FAN MOTORS

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

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

Book

1

1

 

PC 111

Catalog No. 534-893

Printed in U.S.A.

Form 48/50MP-1SI

Pg 1

12-98

Replaces: 50MP-1SI

Tab

1a

1b

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Carrier 50MP62L-10R, MPE62L-10R, 48MPD specifications Installation, Start-Up and Service Instructions, Contents
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MPE62L-10R, 50MP62L-10R, 48MPD specifications

The Carrier 48MPD, 50MP62L-10R, and MPE62L-10R are advanced rooftop packaged units designed for a variety of commercial HVAC applications. These systems offer a compelling blend of energy efficiency, versatility, and high performance, making them ideal choices for businesses looking to enhance their indoor climate control.

One of the standout features of the Carrier 48MPD series is its high efficiency rating, which significantly reduces operational costs while minimizing environmental impact. The unit utilizes advanced scroll compressors that provide reliable and efficient cooling capabilities, ensuring optimal temperature regulation regardless of outdoor conditions. This innovative design also contributes to quieter operation, enhancing indoor comfort without disruptive noise levels.

The Carrier 50MP62L-10R model boasts superior cooling and heating capabilities, equipped with a multi-speed fan system that allows for tailored airflow to suit specific project requirements. This model's economizer feature is pivotal for harnessing outside air to offset mechanical cooling, leading to further energy savings, particularly in moderate weather conditions. Additionally, the unit's dual-fuel capability enhances its operational flexibility, allowing it to switch between electric and gas heating sources depending on efficiency needs.

In terms of control technologies, the MPE62L-10R is equipped with Carrier's advanced Smart Evaporator Control, which ensures precise humidity management while optimizing energy consumption. This model also integrates seamlessly with building automation systems, enabling remote monitoring and adjustments for greater operational oversight and efficiency. The intuitive user interface simplifies system programming and operation, making it accessible even for those without extensive technical backgrounds.

Another important characteristic of these units is their robust construction, designed to withstand challenging weather conditions and ensure longevity. The use of high-quality materials and components means lower maintenance costs over time.

Overall, the Carrier 48MPD, 50MP62L-10R, and MPE62L-10R represent a well-engineered suite of HVAC solutions that excel in efficiency, adaptability, and user-friendliness, establishing themselves as leading choices for commercial indoor climate management. With their blend of innovative technology and solid performance, these systems are well-suited to meet the diverse needs of modern commercial spaces.
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