Startup Options - heat-timer Digi-Span Elite Series HWE-SS Installation And Operation Instructions Manual

Sensor Wiring
Determining the proper location for the Outdoor Sensor is very important. The HWE-SS will base the heat on
the outdoor temperature information it receives from this location. If the sensor is in the sun, or covered with
ice, its reading will be different from the actual Outdoor temperature (OD).
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Wiring the Domestic Hot Water Call DHW (T3+, T3-)
• DHW can be used to raise system Set Point to the lower of 200°F or Maximum Target temperature.
• DHW Call terminals are dry contact N.O. terminals.
• Wire an aquastat or another control to provide contact closure on the DHW Call terminals.
Boiler
Output Wiring
Wiring the Enable/Disable (EXT+, EXT-)
• The EXT terminals can be used to enable or disable the system by connecting it to a thermostat, external control,
or a switch. It accepts dry contact input only.
YELLOW
• If no thermostat or control is connected to the EXT terminals, leave the jumper supplied as a contact to the
terminals.
• No outputs will be active unless the EXT terminals are closed/shorted.
Wiring the Setback/Boost (P+, P-)
• The Setback feature can be used to provide the HWE-SS with a lower temperature Set Point when less heat is
required.
• A typical use for Setback is to provide less system temperature to a building during the night or on the
weekends when building is not occupied, but heat is still required.
Sensor Wiring
• The Setback is activated by closing/shorting the P+ and P- terminals using an external timer.
24VAC Power Wiring
Button and Navigating Menus
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
The HWE-SS has three buttons.
• The SET button function varies. When the Default Screen is displayed, pressing the SET Button views the
MENU. When in the Menus and settings, the SET Button accepts the selected entry or setting value.
• When in the menus, pressing 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. In addition,
when in the default screen, the Up and Down buttons will display the outdoor
temperature and Outdoor Cutoff.
• At 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.

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 HWE-SS 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 HWE-SS 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.
S.P.S.T. Output Wiring
24VAC Power Wiring
N.O.
4
ALERT
DHW Call
Wiring
N.O.
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Sensor Wiring
24VAC Power Wiring
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
System Pump
Output Wiring
N.O.
ORANGE
Input Terminals
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
DHW Call
Wiring
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Default: Outdoor Reset
120VAC Power Wiring
BLACK
120VAC Power Source
BLACK
T1 COM
Output Wiring
VIOLET
T1 COM
T1 COM T2 COM
SET
T1 COM T2 COM
SET
DISPLAY UNIT:
Default: ºF
F
C
SET
CONTROL MODE:
Outdoor Reset
Set Point
SET
ORANGE N.O.
Setback/Boost
Wiring
T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
DHW Call
Wiring
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
DHW Pump
N.O.
Enable/Disable
Wiring
T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T3+ T3- EXT+ EXT- P+ P- COM 24VAC