Honeywell T775U - Manual (Page 29)

T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
29 62-0255—07
Fig. 65. Reset Curve for MOD 1 with Setback Offset.
NOTE: For MOD 2 and the Relays, a setpoint offset is
used. See “3.3.1. SETPOINT OFFSET (MOD 2
only)” on page 32.
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.
Fig. 66. Setpoint Values for Reset and Setback.
3.2. Program Menus for Outputs with
Reset
Press the MENU button, select PROGRAM, then highlight
MOD 1 and press the X button to view the parameters.
The Reset curve settings (Fig. 67 through Fig. 70) are
programmed for the first output (MOD 1) and these
settings apply to all outputs that are configured for Reset.
See Fig. 65 for the reset curve values used in the
following section.
NOTE: The Setback parameter displays only if schedul-
ing is enabled (see Fig. 47 on page 21) or the DI
Option is set to Setback (see Fig. 49 on
page 22).
Fig. 67. Program - Sensor A Max. Setpoint.
3.2.1. SP MAX A1 or BOILER MAX
(Setpoint maximum for Sensor A)
1. From the menu, use the S and T buttons to high-
light BOILER MAX or SP MAX A1.
2. Press the X button to display the maximum setpoint
value.
3. Use the S and T 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)
4. Press the X button to accept the setpoint tempera-
ture and display the next option.
Fig. 68. Program -Sensor B Max. Setpoint.
3.2.2. RESET B1 or OUTSD MIN
(Sensor B value when at SP MAX A1 Setpoint)
1. From the menu, use the S and T buttons to high-
light RESET B1 or OUTSD MIN.
2. Press the X button to display the setpoint value.
3. Use the S and T buttons to increase/decrease the
desired setpoint temperature.
Default: 10°F (-12°C)
Range: -40°F to 248°F (-40°C to 120°C)
4. Press the X button to accept the value and display
the next option.
SENSOR B
SP MAX A1
(BOILER MAX)
SP MIN A2
(BOILER MIN)
200
140
10
SETBACK
OFFSET
-10°F
190
20 30 40 50 60 70 °F 80
150
160
170
210
220
180
°F
RESET B1
(OUTSD MIN)
RESET B2
(OUTSD MAX)
S
E
N
S
O
R
A
M24570
SP MAX A1
RESET B1
SP MIN A2
RESET B2
THROT RNG
ACTION
SETBACK
EXIT
OR
PROGRAM
MOD 1
MENU
PROGRAM
MOD 1
BOILR MAX
OUTSD MIN
BOILR MIN
OUTSD MAX
THROT RNG
ACTION
SETBACK
EXIT
MENU
PROGRAM
MOD 1
MOD 1 RESET:
YES-OTHER AND
DI OPTION = SETBACK
MOD 1 RESET:
YES-BOILER AND
DI OPTION = SETBACK
M24571
ENTER
MAXIMUM
SETPOINT FOR
SENSOR A
PROGRAM
MOD
1
SP MAX A1
MENU
PROGRAM
MOD 1
SP MAX A1
210 F o
M24572
ENTER
SENSOR B VALUE
FOR MAXIMUM
SETPOINT
PROGRAM
MOD
1
RESET B1
MENU
PROGRAM
MOD 1
RESET B1
20 F o
M24573