VTC-1D user manual
Phason
6
2009-06-19
To set the mode of operation
1.
Press the switch to the right to start at the beginning of the parameter list.
2.
Press the switch to the left two times and then hold.
For auto shut-off mode, the display flashes between
oS
and the setting. For idle mode, the display shows
id
.
3.
To set the control for auto shut-off mode, turn the trimmer to the desired off set-back using a small, flat
screwdriver. To set the control for idle mode, turn the trimmer fully clockwise. See section D of the
diagram on page 3 for the location.
Setting the temperature set point
The temperature set point is the desired temperature. It is also the reference for the off set-back and
differential temperature settings.
For more information, see
Example 1: shut-off (OSB)
mode on page 9 and
Example 2: idle mode
on
page 10.
To display and adjust temperature set point
1.
Press and hold the switch to the right.
2.
Turn the
Temperature
knob to the desired setting while holding the switch to the right. The
temperature set point can be between 32 and 98°F (0 and 38°C).
3.
Release the switch.
You must hold the switch to the right while turning the knob. If this is not done
correctly, the display flashes between
tS
and the temperature display. This means
the knob has been turned without holding the switch. The control will not accept
the new setting until the switch is clicked to the right.
Setting the differential temperature
The differential is the number of degrees above the temperature set point that the fan reaches maximum
speed. For example, if the temperature set point is 80°F and the differential is 6°F, the fan will be at
maximum speed at 86°F. For more information, see
Example 1: shut-off (OSB)
mode on page 9 and
Example 2: idle mode
on page 10.
To display and adjust the differential
1.
Press the switch to the right to start at the beginning of the parameter list.
2.
Press and hold the switch to the left.
The display flashes between
di
and the setting.
3.
Adjust the internal trimmer using a small flat screwdriver. See section C of the diagram on page 3 for the
location.
