heat-timer DiGi-SPAN Elite Series Assembly, Installation And Operation Instructions page 9

Sensor Wiring
Valve Mode
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Options: Auto, Close, Open
/<Maintenance>/Valve
SET
•
The Auto option allows the HWE-MOV to modulate and pulse the valve open or close to achieve
a specific target temperature.
•
The Close option will energize the Close relay constantly. This is useful in cases of equipment
repairs and testing.
•
The Open option will energize the Open relay constantly. This is useful in cases of equipment
repairs and testing.
Enable/Disable Input
•
The HWE-MOV will provide heat only if the EXT- and EXT+ terminals are shorted. If no
external equipment or switch is connected to these terminals, leave the factory installed jumper.
•
When the terminals are OPEN, the Target will display TSTAT OPEN.
•
Even if the EXT terminals are open, a call for DHW will energize the output relays based on the
DHW Priority configuration.
•
The Enable /Disable terminals can be used as a Summer/Winter switch when connected to an
external switch.
NOTE: On a sensor fault while the Enable/Disable terminals are open, the control will follow the
Enable /Disable state regardless of the sensor fault condition.
24VAC Power Wiring
24VAC Power Source
Return Sensor
HWE-MOV Digi-Elite Operation Manual
9
Wiring
Default: Auto
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
Setback/Boost
Wiring
Valve Mode:
Auto T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
Close
Open
SYSTEM= 55 F
MANUAL CLOSE
SYSTEM= 55 F
MANUAL OPEN
Enable/Disable
Wiring
T1 COM T2 COM T3+ T3- EXT+ EXT- P+ P- COM 24VAC
SYSTEM= 55 F
TSTAT OPEN
SYSTEM= SHORT
TSTAT OPEN