Carrier 48/50PM C16-28 manual General, Basic Control Usage, ComfortLink Control, Scrolling Marquee

!WARNING

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death and/or property damage.

Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Refer to the User’s Information Manual provided with this unit for more details.

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

What to do if you smell gas:

1.DO NOT try to light any appliance.

2.DO NOT touch any electrical switch, or use any phone in your building.

3.IMMEDIATELY call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

4.If you cannot reach your gas supplier, call the fire department.

GENERAL

This publication contains Start−Up, Controls, Operation, Service, and Troubleshooting information for the 48/50PG and 48/50PM rooftop units. (See Table 1.) These units are equipped with ComfortLinkt controls version 5.X or higher and use Puronr refrigerant. The specific base unit installation instructions and/or wiring label diagram may also be required in conjunction with this book as a guide to a specific unit on the roof. All the units in table 1 are Constant Volume (CV) units that provide stand−alone or network operation.

Table 1 – Rooftop Units

MODEL	SIZE	NOMINAL TONS
	03	2
	04	3
	05	4
	06	5
48/50PG	07	6
	08	7.5
	09	8.5
	12	10
	14	12.5
	16	15
48/50PM	20	18
	24	20
	28	25

BASIC CONTROL USAGE

ComfortLink Control

The ComfortLink control is a comprehensive unit-management system. The control system is easy to access, configure, diagnose and troubleshoot.

The ComfortLink control is fully communicating and cable-ready for connection to the Carrier Comfort Network (CCN) building management system. The control provides high-speed communications for remote monitoring via the Internet. Multiple units can be linked together (and to other ComfortLink control equipped units) using a 3-wire communication bus.

The ComfortLink control system is easy to access through the use of a unit-mounted display module. There is no need to bring a separate computer to this unit for start-up. Access to control menus is simplified by the ability to quickly select from 11 menus. A scrolling readout provides detailed explanations of control information. Only four, large, easy-to-use buttons are required to maneuver through the entire controls menu. The display readout is designed to be visible even in bright sunlight.

For added service flexibility, an accessory hand-held Navigator module is also available. This portable device has an extended communication cable that can be plugged into the unit’s communication network at the main control box. The Navigator display provides the same menu structure, control access and display data as is available at the unit-mounted Scrolling Marquee display.

MODE
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs	Alarm Status
Outputs	ESCAPE ENTER
Configuration
Time Clock
Operating Modes
Alarms

C06320

Fig. 1 − Scrolling Marquee

Scrolling Marquee

This device is the keypad interface used to access the control information, read sensor values, and test the unit. The Scrolling Marquee is located in the main control box and is standard on all units. The Scrolling Marquee display is a 4-key, 4-character, 16-segment LED (light-emitting diode) display module. The display also contains an Alarm Status LED. (See Fig. 1.)

The display is easy to operate using 4 buttons and a group of 11 LEDs that indicate the following menu structures:

SRun Status

SService Test

STemperatures

SPressures

SSet points

SInputs

SOutputs

SConfiguration

STimeclock

SOperating Modes

SAlarms

Through the Scrolling Marquee, the user can access all of the inputs and outputs to check on their values and status, configure operating parameters plus evaluate the current decision status for operating modes. The control also includes an alarm history which can be accessed from the display. In addition, through the Scrolling Marquee, the user can access a built-in test routine that can be used at start-up commissioning and to diagnose operational problems with the unit. (See Table 2.)

48/50PG and PM

3