T775A/B/M SERIES 2000 CONTROLLER

2. SETUP (ADVANCED OPTIONS)

SETUP

SENSORS SENSOR B

LIMIT

SETUP

SENSORS

SENSOR B

LIMIT

DISABLE

HI LIMIT

LOW LIMIT

SELECT

 

HI/LOW

 

LIMIT FOR

 

SENSOR B

M24508

 

2.2.4.LIMIT (Sensor B only)

For the T775M2030 and T775M2048 models only, the LIMIT item displays on the Sensor B menu.

NOTE: The LIMIT option acts only on Modulating Output 1.

1.

From the Sensors menu, use the T button to high-

 

light SENSOR B.

2.

Press the X button to display the Sensor B menu.

3.

Use the S and T buttons to select the LIMIT item.

4.

Use the X button to display the Limit selections.

Fig. 42. Setup - Sensors - Sensor B - Limit.

5.

Use the S and T buttons to select the desired limit,

 

(Disable, Hi Limit, or Low Limit).

 

Default: Disable

6.

Press the X button to accept the value and return to

 

the Sensor B menu.

When you select Hi Limit or Low Limit, the Sensor B menu changes and adds the Hi/Low Limit and Throttling Range items.

If you are setting a Hi or Low Limit, continue with “2.2.4.1. HI LIMIT or LOW LIMIT (Sensor B only)”.

If you selected Disable for the Limit value, continue with “2.3. Setting up the Outputs” on page 21.

SETUP

SENSORS

SENSOR B

SETUP

SENSORS SENSOR B

UNITS CALIBRATE LABEL LIMIT

HI LIMIT THROT RNG EXIT

SETUP

SENSORS

SENSOR B

HI LIM

90 oF

ENTER

VALUE FOR

SENSOR B

HI LIMIT

M24509

2.2.4.1. HI LIMIT or LOW LIMIT (Sensor B only)

Fig. 43 shows the Hi Limit (Heat mode), but the process is the same for setting the Low Limit (Cool mode). For proper operation, the high limit should be used only in the Heat mode, and the low limit only in the Cool mode.

Sensor B can be assigned a high/low limit, so that as you are controlling temperature at Sensor A, the control adjusts its modulating output to prevent exceeding the user-entered limit for Sensor B.

1.

From the Sensor B menu, use the T button to high-

 

light HI LIMIT or LOW LIMIT.

2.

Press the X button display the LIMIT value.

3.

Use the S and T buttons to increase/decrease the

 

desired Limit value.

4.

Press the X button to accept the value and return to

Fig. 43. Setup - Sensors - Sensor B - Hi/Low Limit

(showing Hi Limit).

the Limit menu.

62-0254–03

20

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Image 28
Honeywell AC-220-7, AC-140-7 manual HI Limit or LOW Limit Sensor B only
Page 27 Page 29

AC-220-7, AC-140-7 specifications

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