Hi Limit Or Low Limit; Throttling Range; Setting Up The Outputs - Honeywell T775R 2000 Series Installation Instructions Manual

T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
SETUP
SENSORS
SENSOR B
Fig. 52. Setup - Sensors - Sensor B - Hi/Low Limit
(showing Hi Limit).
SETUP
SENSORS
SENSOR B
CALIBRATE
LABEL
LIMIT
HI LIMIT
THROT RNG
EXIT
Fig. 53. Setup - Sensors - Sensor B - Throttling Range.
SETUP
OUTPUTS
MOD 1
Fig. 54. Setup - Outputs Menu.
62-0249—13
SETUP
SENSORS
SENSOR B
CALIBRATE
LABEL SETUP
LIMIT SENSORS
HI LIMIT SENSOR B
THROT RNG
EXIT
ENTER
VALUE FOR
SENSOR B
HI LIMIT
SETUP
SENSORS
SENSOR B
SETUP
SENSORS
SENSOR B
THROT RNG
10
ENTER
VALUE FOR
SENSOR B
THROTLING
RANGE
SETUP
OUTPUTS
MOD 1
TYPE
MIN OUT %
INTEGRAL
DERIVATIV
SCHEDULE
RESET
HIDE
EXIT

3.2.3.3.1. HI LIMIT or LOW LIMIT

only)
Fig. 52 shows the Hi Limit, but the process is the same for
setting the Low Limit. This applies to the T775R2043
model only.
Sensor B can be assigned a high/low limit, so that as you
HI LIM
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  button to high-
light HI LIMIT or LOW LIMIT.
90 o
F
2. Press the  button display the LIMIT value.
3. Use the  and  buttons to increase/decrease the
desired Limit value.
4. Press the  button to accept the value and return to
the Limit menu.
M24331
The high and low limit action will work in either the heat or
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.

3.2.3.4. THROTTLING RANGE

only)
The throttling range for the modulating high or low limit
positions the setpoint at the end of the throttling range.
For example, with a high limit at Sensor B of
200°F (93°C) and a throttling range of 10°F (-12°C), the
modulating output controlling Sensor A begins to throttle
back at 190°F (88°C), and fully closes at 200°F (93°C).
Conversely, the throttling range for the low limit begins
above the setpoint in the same manner.
o
F
1. From the Limit menu, use the  button to highlight
THROT RNG.
2. Use the  and  buttons to increase/decrease the
desired value for the Throttling Range.
Default = 0
3. Press the  button to accept the value and return to
M24332A
the Limit menu.
4. Press the  button to exit the Limit menu.
5. Press the  button to exit the Sensors menu and
return to the Setup menu.

3.3.3. Setting up the Outputs

1. From the Setup menu, use the and  buttons to
highlight OUTPUTS.
2. Press the  button to display the Outputs menu.
NOTE: The menus (e.g. the Outputs menu shown
here) can display only those relays that are
defined in Setup (Refer to "3.3.4. NBR OF
RELAYS" on page 25). For example, if you
configure only two relays, then only two
relays display on the appropriate menus.
The following procedures set up each modulating output
M24334A
and relay output.
22
(Sensor B
(Sensor B