CONTROL

CONTROL POINT

CURVE

(Approx Deg F)

AT 50% RH

 

A73

B68

C63

D58

Fig. 46 Ð Psychrometric Chart for

Enthalpy Control

NOTES:

1.Switches shown in high enthalpy state. Terminals 2 and 3 close on enthalpy decrease.

2.When standard economizer is used with accessory differential enthalpy sen- sor, set enthalpy control to ``D'' setting.

Fig. 47 Ð Wiring Connections for Solid-State

Enthalpy Sensor (HH57AC077)

KEYPAD AND DISPLAY MODULE (HSIO) CONFIGURATION

IMPORTANT: The HSIO keypad and display module is required for initial start-up of these units. All units are shipped in standby mode, and the HSIO should be used to change the unit to run mode. Once the unit is in run mode, the HSIO is not required for normal operation.

The keypad and display module provides unit function in- formation at the unit. See Fig. 48. The module consists of a keypad with 6 function keys, 5 operative keys, 10 numeric keys (0 through 9), and an alphanumeric 8-character liquid crystal display (LCD). Key usage is explained in Table 23. Each function has one or more subfunctions.

The HSIO keypad and display module is installed by con- necting the power and communication plugs and can be easily moved from one unit to another. Because of this ¯ex- ibility, one HSIO can be used for several units.

Unit operation is controlled by the status of the run/ standby mode on the HSIO. To access the mode, press

on the HSIO keypad, and then press

.

The HSIO will display either STBY YES or STBY NO.

To enable the unit, press CLEAR or and press ENTER while

at the STBY YES display. To disable the unit, press

ENTER while at the STBY NO display. Clearing an alarm

that has stopped unit operation is accomplished by entering the STBY YES mode.

IMPORTANT: Use the STBY YES mode when ser- vicing the unit or running the quick test feature.

IMPORTANT: If remote start function is used, place LOCAL/REMOTE switch in Local (OFF) position when ever unit is placed in STBY YES.

SET UNIT TYPE Ð The correct unit type must be set. The default unit type is VAV. If the unit is being used in a VAV application, then the unit type does not need to be changed.

Table 23 Ð HSIO Keypad Key Usage

FUNCTION

USE

KEYS

 

 

 

 

Status Ð To display diagnostic codes and

 

 

 

current operating information about the unit.

 

 

 

Quick Test Ð To check inputs and outputs for

 

 

 

proper operation.

 

 

 

History Ð To check most recent alarms.

 

 

 

 

 

 

 

Service Ð To enter speci®c unit con®guration

 

 

 

information.

 

 

 

Set Point Ð To enter operating set points and

 

 

 

day/time information.

 

 

 

Schedule Ð To enter occupied/unoccupied

 

 

 

schedules for unit operation.

OPERATIVE

USE

KEYS

 

 

 

 

Expand Display Ð To display a non-

 

 

 

abbreviated expansion of the display.

 

 

 

Clear Ð To clear the screen and return to previous

 

CLEAR

 

display. Also used to enter data value

 

 

 

of zero.

 

 

 

 

 

 

Up Arrow Ð To return to previous display position.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Down Arrow Ð To advance to next display position.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To enter data.

 

ENTER

 

 

 

 

 

 

 

 

 

STAT

EXPN

1

2

3

SRVC

TEST

EDIT

ALRM

SET

SCHD

4

5

6

HIST

ALGO

 

 

7

8

9

CLEAR

 

 

-

0

 

ENTER

Fig. 48 Ð Keypad and Display Module (HSIO)

36

Page 35 Page 37
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Image 36
Carrier MPE62L-10R, 50MP62L-10R, 48MPD specifications Keypad and Display Module Hsio Configuration, Hsio Keypad Key Usage
Page 35 Page 37

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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