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T775U SERIES 2000 CONTROLLER
PROGRAM
MOD 1
SP MIN A2
Fig. 69. Program - Sensor A Min. Setpoint.
PROGRAM
MOD 1
RESET B2
Fig. 70. Program - Sensor B Min. Setpoint.
PROGRAM
MOD 1
THROT RNG
Fig. 71. Program - Throttling Range or Differential.
62-0255–05
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3. PROGRAMMING OUTPUTS (MOD AND RELAY) WITH RESET
MENU
3.2.3. SP MIN A2 or BOILER MIN
PROGRAM
MOD 1
SP MIN A2
1. From the menu, use the
2. Press the
3. Use the
160
o
F
ENTER
MINIMUM
4. Press the
SETPOINT FOR
SENSOR A
M24574
MENU
3.2.4. RESET B2 or OUTSD MAX
PROGRAM
MOD 1
RESET B2
1. From the menu, use the
2. Press the
3. Use the
70
o
F
ENTER
SENSOR B VALUE
4. Press the
FOR MINIMUM
SETPOINT
M24575
MENU
3.2.5. THROTTLING RANGE or DIFFERENTIAL
PROGRAM
MOD 1
Throttling Range displays for Modulating outputs.
THROT RNG
Differential is used for the Relay outputs.
1. From the menu, use the
2. Press the
20
o
F
3. Use the
ENTER
THROTTLING
RANGE FOR
FOR MOD 1
4. Press the
M24577
The Throttling Range brackets the setpoint setting, e.g., if
the setpoint is 72°F and the throttling range is 10°F, then
the effective throttling temperature range is 67°F to 77°F.
In heating mode, the Differential is below the setpoint.
The relay de-energizes when the temperature rises to the
setpoint. As the temperature drops to the setpoint minus
the Differential, the relay energizes.
In cooling mode, the Differential is above the setpoint.
The relay de-energizes when the temperature falls to the
setpoint. As the temperature rises to the setpoint plus the
Differential, the relay energizes.
30
(Setpoint minimum for Sensor A)
and
light BOILER MIN or SP MIN A2.
button to display the setpoint value.
and
buttons to increase/decrease the
desired minimum setpoint temperature.
Default: 140°F (60°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 MIN A2 Setpoint)
and
light RESET B2.
button to display the setpoint value.
and
buttons to increase/decrease the
desired setpoint temperature.
Default: 60°F (16°C)
Range: -40°F to 248°F (-40°C to 120°C)
button to accept the value and display
the next option.
and
light THROT RNG or DIFFERNTL.
button to display the throttling range
value.
and
buttons to increase/decrease the
desired value.
Default: 20°F (-6.6°C)
Range: 1°F to 150°F (1°C to 66°C)
button to accept the value and display
the next option.
buttons to high-
buttons to high-
buttons to high-
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