Carrier 48/50PM C16-28 manual Scrolling Marquee Display, Accessory Navigatort Display, Escapeenter

Scrolling Marquee Display

This device is the keypad interface used to access rooftop information, read sensor values, and test the unit. (See Fig. 44.) The Scrolling Marquee display is a 4-key, 4-character, 16-segment LED (light-emitting diode) display. Eleven mode LEDs are located on the display as well as an Alarm Status LED. See Basic Control Usage section for further details.

Accessory Navigatort Display

The accessory hand-held Navigator display can be used with 48/50PG and PM units. (See Fig. 45.) The Navigator display operates the same way as the Scrolling Marquee device. The Navigator display plugs into the LEN port on either TB or the ECB board.

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

C06320

Fig. 44 − Scrolling Marquee

C o

m f

o r

t L

N

i n

k

A V

I

G

A T

TIME

O R

1

EW

T

2 . 5 8

L

5

WT

4 .

6 °

F

SE

4

TP

4 . 1

° F

4 4

. 0

° F

M O

D E

Alarm

Run

Status

Sta

tus

Service

Test

T

P

empera

tures

ress

Se

ures

tpoints

In

puts

O

utputs

Con

figuration

Time

Oper

Clock

E

S C

ating M

Alarms

odes

ENT

ER

C06321

Fig. 45 − Accessory Navigatort Display

Carrier Comfort Network (CCN)R Interface

The units can be connected to the CCN if desired. The communication bus wiring is a shielded, 3-conductor cable with drain wire and is field supplied and installed. The system elements are connected to the communication bus in a daisy chain arrangement. (See Fig. 46.) The positive pin of each system element communication connector must be wired to the positive pins of the system elements on either side of it. This is also required for the negative and signal ground pins of each system element. Wiring connections for CCN should be made at TB. (See Fig. 18.) Consult the CCN Contractor’s Manual for further information.

NOTE: Conductors and drain wire must be 20 AWG (American Wire Gauge) minimum stranded, tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –20_C to 60_C is required. See Table below for acceptable wiring.

MANUFACTURER	PART NO.
Alpha	2413 or 5463
Belden	8772
Carol	C2528
West Penn	302

It is important when connecting to a CCN communication bus that a color-coding scheme be used for the entire network to simplify the installation. It is recommended that red be used for the signal positive, black for the signal negative and white for the signal ground. Use a similar scheme for cables containing different colored wires.

At each system element, the shields of its communication bus cables must be tied together. The shield screw on TB1 can be used to tie the cables together. If the communication bus is entirely within one building, the resulting continuous shield must be connected to a ground at one point only. The shield screw on TB1 is not acceptable for grounding. If the communication bus cable exits from one building and enters another, the shields must be connected to grounds at the lightning suppressor in each building where the cable enters or exits the building (one point per building only). To connect the unit to the network:

1.Turn off power to the control box.

2.Cut the CCN wire and strip the ends of the red (+), white (ground), and black (–) conductors. (Substitute appropriate colors for different colored cables.)

3.Connect the red wire to (+) terminal on TB1, the white wire to COM terminal, and the black wire to the (–) terminal.

4.The RJ14 CCN connector on TB1 can also be used, but is only intended for temporary connection (for example, a laptop computer running Carrier network software).

5.Restore power to unit.

IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting. If abnormal conditions occur, unplug the connector. If conditions return to normal, check the CCN connector and cable. Run new cable if necessary. A short in one section of the bus can cause problems with all system elements on the bus.

48/50PG and PM

77