Limit; Hi Limit Or Low Limit - Honeywell T775A/B/M 2000 Series Installation Instructions Manual

T775A/B/M SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLERS
SETUP
SENSORS
SENSOR B

LIMIT

Fig. 44. Setup - Sensors - Sensor B - Limit.
SETUP
SENSORS
SENSOR B
Fig. 45. Setup - Sensors - Sensor B - Hi/Low Limit
(showing Hi Limit).
62-0254—13
SETUP
SENSORS
SENSOR B
LIMIT
DISABLE
HI LIMIT
LOW LIMIT
SELECT
HI/LOW
LIMIT FOR
SENSOR B
SETUP
SENSORS
SENSOR B
UNITS
CALIBRATE SETUP
LABEL SENSORS
LIMIT SENSOR B
HI LIMIT HI LIM
THROT RNG
EXIT
ENTER
VALUE FOR
SENSOR B
HI LIMIT
2.2.4. LIMIT
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
highlight SENSOR B.
2. Press the
3. Use the
item.
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4. Use the
5. Use the
limit, (Disable, Hi Limit, or Low Limit).
Default: Disable
6. Press the
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.

2.2.4.1. HI LIMIT or LOW LIMIT

only)
Fig. 45 shows the High Limit, but the process is the same
for setting the Low Limit.
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
90
o
F
highlight HI LIMIT or LOW LIMIT.
2. Press the
3. Use the
the desired Limit value.
4. Press the
to the Limit menu.
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The high and low limit action will work in either the heat or
the cool mode as follows:
• When the low limit is used in the heat mode, the MOD1
output increases to prevent reaching the low limit at
sensor B.
• When the high limit is used in the heat mode, the
MOD1 output decreases to prevent reaching the hi
limit at sensor B.
• When the low limit is used in the cool mode, the MOD1
output decreases to prevent reaching the low limit at
sensor B.
• When the high limit is used in the cool mode, the
MOD1 output increases to prevent reaching hi limit at
sensor B.
20
(Sensor B only)
button to display the Sensor B menu.
and buttons to select the LIMIT
button to display the Limit selections.
and buttons to select the desired
button to accept the value and return
button display the LIMIT value.
and buttons to increase/decrease
button to accept the value and return
button to
(Sensor B
button to