Manual Carrier 48 50PG C03-14 (page 14 of 188) (English)

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FS.SW = 1 (NO) FS.SW = 2 (NC)

C09346

Fig. 8 − 48PG/PM Humidi−MiZert − Third Party Smoke Detector Wiring

Economizer Monitoring

On field terminal board (TB1), terminals 8, 9, and 10 can be used

to monitor economizer position from a third party control system.

See economizer operation section for additional information.

NOTE: Terminal 8 will not represent economizer position if the

unit is equipped with Adaptive Fan.

In digital mode (E.CTL = 1 or 2), the economizer commanded

position can be read as a 2−10v or 4−20mA signal. TB1−8 and

TB1−9 are used as follows:

To read a 2−10v signal, disconnect the violet wire on

TB1−J10−8 and place volt meter device across TB1−8 and

TB1−9.

To read a 4−20mA signal, disconnect the violet wire on

TB1−J10−8 and the 500Ω resister at TB1−J10−6. Place amp

meter device between TB1−8 and TB1−9.

In analog mode (E.CTL = 3), the economizer position can be read

as a 2−10v feedback signal across TB1−10 and TB1−9 at any time.

NOTE: The violet wire and 500Ω resister must be connected at

the J10 connector as originally wired to operate the economizer in

analog mode.

Economizer Damper Control

For units with the economizer option or accessory and the ECB

control board, the damper position can be directly controlled

through the IAQ sensor input provided on the field connection

terminal board. The IAQ Analog Input configuration,

Configuration→AIR.Q→IA.CF will have to set to 3 (Control

Minimum Position). When IA.CF = 3, an external 4 to 20 mA

source is used to move the damper 0% to 100% directly.

Terminal 2 = 4−20mA + signal

Terminal 3 = 4−20mA − common

NOTE: In this mode, preset minimum positions configurations are

not valid, the damper position may exceed the input position to

provide economizer cooling and CO2 sensor input can not be used

for DCV control. Refer to the Indoor Air Quality operation section

for more information.

CONTROLS OPERATION

Display Configuration

The Configuration→DISP submenu is used to configure the local

display settings.

Metric Display (METR)

This variable is used to change the display from English units to

Metric units.

Language Selection (LANG)

This variable is used to change the language of the ComfortLink

display. At this time, only English is available.

Password Enable (PROT)

This variable enables or disables the use of a password. The

password is used to restrict use of the control to change

configurations.

Service Password (PSWD)

This variable is the 4-digit numeric password that is required if

enabled.

Test Display LEDs (TEST)

This is used to test the operation of the ComfortLink display.

Unit Configuration

Many configurations that indicate what factory options and/or field

accessories are installed and other common operation variables are

included in Unit Configuration (Configuration→UNIT). These

configurations will be set in the factory for the factory−installed

options (FIOPs). Field−installed accessories installed will require

configuration changes. General unit and fan control configurations

are also covered under this Unit Configuration menu.

Start−Up Delay (S.DLY)

This configuration sets the control start-up delay after the power is

interrupted. This can be used to stagger the start-up of multiple

units.

Unit Control Type (U.CTL)

This configuration defines if temperature control is based on

thermostat inputs or space temperature sensor input.

U.CTL = 2 (Thermostat) – The unit determines cooling and

heating demand by the state of G, Y1, Y2, W1, and W2 inputs

from a space thermostat. This value is the factory default.

U.CTL = 3 (Space Sensor) – The unit determines cooling and

heating demand based on the space temperature and the

appropriate set point. Used also as Linkage configuration. The

jumper wire in the installer’s packet must be connected between

R and W1 on the low voltage terminal board (TB) for heating

mode to operate.

48/50PG and PM

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Carrier 48 50PG C03-14 Manual

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