Startup Options; Sensor Fault - heat-timer DIGI-SPAN VSP Elite Installation And Operation Instructions Manual

Startup Options

When the control is initiated for the first time or after a manual reset, it will start its operation with the Startup Menu. Later, the
Startup menu can be accessed as an option from the operation menu. An option must be accepted in each screen in the Startup Menu
to move to the next level.
Display Unit
Options: ºF, ºC
/<System Startup>/Display Unit
SET
• The VSP Elite will offer two different temperature displays. If ºF is selected, all temperatures will
display in Fahrenheit. If ºC is selected, all temperatures will display in Celsius.
Control Mode
Options: Outdoor Reset, Set Point
/<System Startup>/Display Unit/Control Mode
SET
• The new VSP Elite have two heating logics. Outdoor Reset; varies the system set point/target based
on outdoor temperature. This selection will add several menu options, Reset Ratio, Offset, Min
Water temp, Max Water temp, and Outdoor Cutoff, to allow of adjustment and fine tuning of the
Reset Curve. In addition, a customized curve will be available for specialized applications.
• Set Point; Gives the installer the flexibility of selecting a fixed set point. The Outdoor Cutoff will be
available if an outdoor sensor was installed.

Sensor Fault

Options: Output On, Output Off
/<System Startup>/..../Sensor Fault
SET
• The Sensor Fault will determine the operating status of the output relays when a sensor reads Short
or Open. On sensor fault the Set Point will indicate FAULT TGT=ON or OFF to indicate the
condition of the output and the faulty sensor will read OPEN or SHORT to indicate the condition of
the sensor.
Outdoor Reset Mode
• When Output-On is selected, the VSP Elite will energize the system relay when System reads
Short or Open and Outdoor is below Outdoor Cutoff. However, if the Outdoor sensor fails and
the Outdoor reads Short or Open, the VSP Elite will change the Target Set Point to the Max
Water Temperature.
• When Output-Off is selected, the VSP Elite will stop the Injection Pump when the System sensor
reads Short or Open. The System/Secondary Loop pump will remain energized for the Run-
On delay then turn off. However, when the Outdoor sensor fails, reads Short or Open, the VSP
Elite will change the Target Set Point to be the Minimum Water Temperature.
Set Point Mode
• Output On, the VSP Elite will energize the System relay and increase Injection Pump speed to 100%
when the System sensor reads Short or Open.
• Output-Off, the VSP Elite will de-energize the System relay and stop the Injection Pump speed
when the System sensor reads Short or Open.
• The Outdoor Sensor Short or Open status will not affect the control operation in Set Point mode.
Default: ºF
Default: Outdoor Reset
Default: Output On
8
DISPLAY UNIT:
F
C
CONTROL MODE:
Outdoor Reset
Set Point
SENSOR FAULT:
Output On
Output Off