Example 16 Ð Con®guration of Discrete

Temperature Control

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

DO CTRL

Discrete temperature control

 

 

con®guration subfunction of

 

 

service function

 

SEN 1

Controlling temperature sensor

 

 

con®gured to sensor 1. Sensor

 

 

codes as follows:

 

 

1 - Supply-air temperature sensor

 

 

(standard)

 

 

2 - Outdoor-air temperature

 

 

sensor (standard)

 

 

3 - Mixed-air temperature sensor

 

 

(optional)

 

 

6 - Space temperature sensor

 

 

(standard)

 

 

7 - Return-air temperature

 

 

(standard)

 

 

34 - Other optional sensors

 

SEN 34

Controlling temperature sensor is

 

 

34, where sensor 34 is one of

 

 

2 optional sensor types

 

 

(space temperature sensor or

 

 

duct temperature sensor)

 

 

Discrete output control logic

 

TYP 0

(0 = normal logic, 1 = reverse

 

 

logic)

Ð Used to read service history. See Example 17.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ð Used to read or change ®eld con®guration

of service maintenance alarm duration and to read elapsed time. See Example 18.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ð Used to read timed override history. See Example 19.

NOTE: The key is used to enable or turn on certain functions; the CLR key is used to disable these functions.

The key may also be used to disable the functions.

SET POINT FUNCTION Ð Set points are entered through the keyboard. Set points can be changed within the upper and lower limits, which are ®xed. See Table 17.

Example 17 Ð Service History Con®guration

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

SERVHIST

Service history con®guration

 

subfunction of service function

 

 

 

SDAY 2

The unit had 2 starts within the

 

last 24 hours

 

 

 

ST 20

The unit had a total of 20 starts

 

since the unit was manufactured

 

 

 

FH 240

The fan has run for 240 hours

 

since unit manufacture.

 

 

 

4.06.30

The unit was last started on

 

Thursday at 6:30 am

 

 

 

4.19.00

The unit was last stopped on

 

Thursday at 7:00 pm

 

 

Example 18 Ð Service/Maintenance

Alarm Con®guration

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

SRV/MTN

Service/Maintenance alarm

 

 

con®guration subfunction of

 

 

service function

 

SMAL 2

Service/Maintenance alarm

 

limit is 2000 hrs (hours x 1000)

 

 

 

SMAL 5

Service/Maintenance alarm

 

 

limit is changed to 5000 hrs (This

 

 

represents the cumulative number

 

 

of hours the fan must be energized

 

 

before a service/maintenance alarm

 

 

is generated)

 

 

(NOTE: Entering a . disables the

 

 

alarm function)

 

SMEH 3

Service/Maintenance elapsed

 

 

hours is 3000 (This is the amount of

 

 

time elapsed from the start of the

 

 

service/maintenance alarm interval)

Example 19 Ð Timed Override History

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

OVRDHIST

Timed override history

 

subfunction of service function

 

 

 

OHR 3

Within the current 24 hour period

 

 

(beginning at midnight), the unit

 

 

operated for 3 hours in the timed

 

 

override mode (mode 39)

Ð Displays system set points. See Table 13 for sequence of set points.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ð Displays demand limit set points.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ð Displays time of day and day of week.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ð Displays Daylight Savings Time.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ð Displays holidays (month, day, and duration).

Table 17 Ð Set Point Ranges and Defaults

SET POINT

ALLOWABLE

DEFAULT

RANGE

 

 

Occupied Heating Set Point (F)

40 to 90

68

Occupied Cooling Set Point (F)

45 to 99

78

Unoccupied Heating Set Point (F)

40 to 90

55

Unoccupied Cooling Set Point (F)

70 to 99

90

Static Pressure

0 to 5.0

1.5

Set Point (in. wg)

 

 

Supply-Air Temperature

35 to 65

55

Set Point (F)

 

 

Delta CFM Set Point

0 to 250

0

Humidity Set Point (%)

0 to 100

40

Analog Temperature

40 to 100

40

Control Set Point (F)

 

 

Discrete Temperature

−40 to 245

0

Control Set Point (F)

 

 

Air Quality Sensor 1

0 to 2000

650

Set Point (ppm)

 

 

Air Quality Sensor 2

0 to 2000

650

Set Point (ppm)

 

 

Outside Air Velocity Pressure

0.0 to 5.0

0.08

Set Point (in. wg)

 

 

87

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Image 87
Carrier 39L Example 16 Ð Conguration of Discrete Temperature Control, Example 17 Ð Service History Conguration
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