°F
220
SP MAX A1
210
(BOILER MAX)
S
200
E
N
190
S
O
180
R
A
170
SETBACK
OFFSET
160
SP MIN A2
-10°F
(BOILER MIN)
150
140
20
10
30
RESET B1
(OUTSD MIN)
SENSOR B
Fig. 65. Reset Curve for MOD 1 with Setback Offset.
MOD 1 RESET:
YES-OTHER AND
DI OPTION = SETBACK
MENU
PROGRAM
PROGRAM
MOD 1
MOD 1
SP MAX A1
RESET B1
SP MIN A2
RESET B2
THROT RNG
ACTION
SETBACK
EXIT
Fig. 66. Setpoint Values for Reset and Setback.
PROGRAM
MOD 1
SP MAX A1
Fig. 67. Program - Sensor A Max. Setpoint.
PROGRAM
MOD 1
RESET B1
Fig. 68. Program -Sensor B Max. Setpoint.
T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
NOTE: For MOD 2 and the Relays, a setpoint offset is
The remainder of this section beginning with "3.2.
Program Menus for Outputs with Reset" on page 29
describes the individual parameters for configuring
outputs with Reset.
For your reference, the following Reset programming
procedure uses the values in Fig. 65 above.
70
40
50
60
80
°F
RESET B2
(OUTSD MAX)
M24570
3.2. Program Menus for Outputs with
MOD 1 RESET:
YES-BOILER AND
Reset
DI OPTION = SETBACK
Press the MENU button, select PROGRAM, then highlight
MENU
MOD 1 and press the
PROGRAM
MOD 1
The Reset curve settings (Fig. 67 through Fig. 70) are
OR
programmed for the first output (MOD 1) and these
BOILR MAX
OUTSD MIN
settings apply to all outputs that are configured for Reset.
BOILR MIN
See Fig. 65 for the reset curve values used in the
OUTSD MAX
THROT RNG
following section.
ACTION
SETBACK
NOTE: The Setback parameter displays only if schedul-
EXIT
M24571
MENU
3.2.1. SP MAX A1 or BOILER MAX
PROGRAM
MOD 1
SP MAX A1
1. From the menu, use the
2. Press the
3. Use the
210
o
F
ENTER
MAXIMUM
SETPOINT FOR
4. Press the
SENSOR A
M24572
MENU
3.2.2. RESET B1 or OUTSD MIN
PROGRAM
MOD 1
RESET B1
1. From the menu, use the
2. Press the
3. Use the
20
o
F
ENTER
SENSOR B VALUE
4. Press the
FOR MAXIMUM
SETPOINT
M24573
29
used. See "3.3.1. SETPOINT OFFSET (MOD 2
only)" on page 32.
button to view the parameters.
ing is enabled (see Fig. 47 on page 21) or the DI
Option is set to Setback (see Fig. 49 on
page 22).
(Setpoint maximum for Sensor A)
and
light BOILER MAX or SP MAX A1.
button to display the maximum setpoint
value.
and
buttons to increase/decrease the
desired maximum setpoint temperature.
Default: 180°F (82°C)
Range: -40°F to 248°F (-40°C to 120°C)
button to accept the setpoint tempera-
ture and display the next option.
(Sensor B value when at SP MAX A1 Setpoint)
and
light RESET B1 or OUTSD MIN.
button to display the setpoint value.
and
buttons to increase/decrease the
desired setpoint temperature.
Default: 10°F (-12°C)
Range: -40°F to 248°F (-40°C to 120°C)
button to accept the value and display
the next option.
buttons to high-
buttons to high-
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