Differential or throttling range, Sensor, Heat/cool – Van Air Systems FP-3 Kit User Manual

Page 23

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1. PROGRAMMING

T775A/B/M SERIES 2000 CONTROLLER

15

62-0254–03

Fig. 29. Program - Differential or Throttling Range.

1.2.2. DIFFERENTIAL or THROTTLING RANGE

Differential is used for Relay outputs and Throttling Range
is used for Modulating outputs.

1.

From the menu, use the

S and T buttons to high-

light THROT RNG or DIFFERNTL.

2.

Press the

X button to display the throttling range

value.

3.

Use the

S and T buttons to increase/decrease the

desired value.

Default: 20°F (-6.6°C)
Range: 1°F to 150°F (1°C to 66°C).

4.

Press the

X button to accept the value and display

the next option.

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.

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.
This applies to both modulating outputs and floating
outputs.

Fig. 30. Program - Sensor.

1.2.3. SENSOR

1.

From the menu, use the

S and T buttons to high-

light SENSOR.

2.

Press the

X button to display the sensor selections.

3.

Use the

S and T buttons to select Sensor A or B.

4.

Press the

X button to accept the highlighted sensor

and display the next option.

Fig. 31. Program - Heat/Cool.

1.2.4. HEAT/COOL

1.

From the menu, use the

S and T buttons to high-

light HEAT/COOL.

Default: HEAT

2.

Press the

X button to display the heat and cool

selections.

3.

Use the

S and T buttons to select Heat or Cool.

4.

Press the

X button to accept the highlighted selec-

tion and display the next option.

ENTER

DIFFERENTIAL

FOR

RELAY 1

PROGRAM

RELAY 1

DIFFRNTL

MENU

PROGRAM

RELAY 1

DIFFRNTL

20

F

o

M24495

MENU

PROGRAM

RELAY 1

SENSOR

SELECT

SENSOR FOR

RELAY 1

SENSOR A

SENSOR B

PROGRAM
RELAY

1

SENSOR

M24496

PROGRAM
RELAY

1

HEAT/COOL

MENU

PROGRAM

RELAY 1

HEAT/COOL

SELECT

HEAT/COOL

FOR

RELAY 1

HEAT

COOL

M24497

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