Install Instructions

T775R SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
62-0249—05 22
Fig. 52. Setup - Sensors - Sensor B - Hi/Low Limit.
3.2.3.3.1. HI LIMIT or LOW LIMIT (Sensor B only)
Fig. 52 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
highlight 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
the Limit menu.
Fig. 53. Setup - Sensors - Sensor B - Throttling
Range.
3.2.3.4. THROTTLING RANGE (Sensor B 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 (Heat) 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 Cooling setpoint in the same manner.
1. From the Limit menu, use the T button to highlight
THROT RNG.
2. Use the S and T buttons to increase/decrease the
desired value for the Throttling Range.
Default = 0
3. Press the X button to accept the value and return to
the Limit menu.
4. Press the W button to exit the Limit menu.
5. Press the W button to exit the Sensors menu and
return to the Setup menu.
Fig. 54. Setup - Outputs Menu.
3.3.3. Setting up the Outputs
1. From the Setup menu, use the Sand T buttons to
highlight OUTPUTS.
2. Press the X 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 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
and relay output.
SETUP
SENSORS
SENSOR B
CALIBRATE
LABEL
LIMIT
HI LIMIT
THROT RNG
EXIT
SETUP
SENSORS
SENSOR B
ENTER
VALUE FOR
SENSOR B
HI LIMIT
SETUP
SENSORS
SENSOR B
HI LIM
90
F
o
M24331
SETUP
SENSORS
SENSOR B
CALIBRATE
LABEL
LIMIT
HI LIMIT
THROT RNG
EXIT
SETUP
SENSORS
SENSOR B
ENTER
VALUE FOR
SENSOR B
THROTLING
RANGE
SETUP
SENSORS
SENSOR B
THROT RNG
10
F
o
M24332A
SETUP
OUTPUTS
SETUP
OUTPUTS
MOD 1
MOD 2
# RELAYS
OPTIONS
RELAY 1
RELAY 2
RELAY 3
RELAY 4
EXIT
M24333