beautypg.com

Scrolling marquee display, Accessory navigator t display, Carrier comfort network (ccn) r interface – Carrier 48/50PD05 User Manual

Page 56: Field-installed accessories, Space temperature sensor (t ), Enter, Escape, Fig. 23 -- scrolling marquee, Fig. 24 -- accessory navigator t display

background image

56

Scrolling Marquee Display

This device is the keypad interface used to access rooftop
information, read sensor values, and test the unit. (See Fig. 23.)

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.

Run Status

Service Test

Temperature

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

Alarm Status

ENTER

MODE

ESCAPE

C06320

Fig. 23 -- Scrolling Marquee

Accessory Navigatort Display

The accessory hand-held Navigator display can be used with
48/50PD units. (See Fig. 24.) 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.

Run Sta

tus

Service

Test

Tempera

ture

s

Pres

sures

Setpo

ints

Inputs

Outp

uts

Config

uratio

n

Time C

lock

Operating

Modes

Alarm

s

E NTE

R

E S C

M O D

E

Alarm

Sta

tus

TIME

EWT

LWT

SETP

1 2 . 5 8

5 4 . 6 °F

4 4 . 1 °F

4 4 . 0 °F

N A V

I G A

T O R

C o m f o

r t

L i n k

C06321

Fig. 24 -- 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. 25.) 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. 25.) Consult the CCN Contractor’s Manual for further

information.

IMPORTANT: 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.

Field-Installed Accessories

Space Temperature Sensor (T--55)

The T--55 space temperature sensor (part no. 33ZCT55SPT) is a
field-installed accessory. The sensor is installed on a building

interior wall to measure room air temperature. The T--55 sensor

also includes an override button on the front cover to permit
occupants to override the Unoccupied Schedule (if programmed).
TB1--T55--1

Sensor Input

. . . . . . . .

TB1--T55--2

Sensor Common

. . . . . . . .

Space Temperature Sensor (T--56)

The T--56 space temperature sensor (part no. 33ZCT56SPT) is a

field-installed accessory. This sensor includes a sliding scale on the
front cover that permits an occupant to adjust the space temperature

set point remotely. The T--56 sensor also includes an override
button on the front cover to allow occupants to override the

unoccupied schedule (if programmed).
TB1--T55--1

Sensor Input

. . . . . . . .

TB1--T55--2

Sensor Common

. . . . . . . .

TB1--T55--3

Setpoint Offset Input

. . . . . . . .

48/

50P

D