heat-timer DiGi-SPAN Elite Series Installation And Operation Instructions Manual page 3

Installing and Wiring Temperature Sensor Inputs
(T1, COM (-30°F-250°F), T3± ( 220°F-900°F))
A variety of sensor inputs can be connected to the SPC-Elite series depending on the
model and sensors provided. However, all temperature sensors are wired the same
way. Each SPC-Elite comes with the sensors it is designed to work with
• T he temperature sensor wires can be extended up to 500' by splicing with 18 gauge
shielded wire.
• D o not run sensor wires in conduit with line voltage.
• I f measuring liquid temperature, the sensor should be inserted into a 3/8" ID well
(HT#904011 or equivalent).
• T he SPC-Elite will operate based on the temperature it reads at the sensor location.
Therefore, select a sensor location that is representative of the entire system.
• I n temperature applications, polarity is not observed. Either wire from the sensor can be connected to either sensor input.
• C onnect the Shield of each sensor at the control side to the respective COM terminal.
• T1, COM U sed for Temperature sensors reading up to 250˚F/121˚C. Sensor Shield is connected to the COM Terminal
• T2, COM Not Used.
• T3+,T3- U sed for High Temperature sensors reading up to 930˚F/499˚C. Sensor Shield is connected to the T3- Terminal
Installing and Wiring a Pressure or Vacuum Sensor
(P+, P-)
• A ttach a 1/4" brass isolation tube (pigtail) to the steam header.
• S crew the pressure or Vacuum sensor to the pigtail. The sensor has 1/4" NPT tapered threads.
• T he sensor wires can be extended up to 500' by splicing with 18 gauge shielded wire.
• D o not run sensor wires in conduit with line voltage.
• T he SPC-Elite will operate based on the pressure or vacuum sensor reading. Therefore, select a sensor
location that is representative of the entire system.
• T he sensor's BLACK wire should be connected to the terminal marked P (-).
• T he RED wire from the sensor should be connected to the terminal marked P (+).
The EXT input terminals must be shorted for SPC-Elite to operate the outputs. DO NOT
remove the factory installed EXT jumper unless it is replaced with an Enable Signal.
Connecting the Enable/Disable
(EXT+, EXT-)
• T he EXT terminals can be used to enable or disable the system by connecting it to either a thermostat or
external control.
• T he EXT input should be dry contact only.
• P olarity is not important. Either wire from the thermostat can be connected to either EXT terminals.
• I f no thermostat or control is connected to the EXT terminals, leave the jumper supplied as a contact to the
terminals.
• N o outputs will be active unless the EXT terminals are closed.
Button and Navigating Menus
The SPC-Elite has three buttons.
• T he SET button function varies. When the Default Screen is displayed, pushing the SET Button views the MENU. When in the
Menus and settings, the SET Button accepts the selected entry or setting value.
• W hen in the menus, the Up and Down buttons will scroll through the menu options. They can be used to change the setting of a
specific function. i.e. change the Set Point, Differential, or System Trim.
• A t the end of every operation menu there is a <Back> option that allows the user to go back one menu level. If the SET Button
was held down for three seconds on the <Back> option, the display will go back to the default screen.
3
ALERT
SPC Digi-Elite Operation Manual
SET
T1 COM T2 COM T3+ T3- EXT+EXT-
SYSTEM =
TARGET =
Decrease Increase
220°F - 900°F
Temperature Sensor Temperature Sensor
SET
T1 COM T2 COM T3+
SYSTEM =
TARGET =
Cut the Green,
Decrease
White, and Clear
T1 COM T2
SET
SET
SET
SET
P+ P- COM24VAC T1 COM T2 COM T3+ T3-
®
o
147 F
o
150 F
OUTPUTS
System
-30°F - 250°F
®
T3- EXT+EXT- P+ P- COM24VAC
o
147 F
o
150 F
OUTPUTS
Increase System
Tube
Connect
to 1/4" pigtail
SET
COM T3+ T3- EXT+EXT- P+ P- COM24V
Enable/Disable
Switch
E