INSTALLATION AND OPERATION INSTRUCTIONS
HWE-SS DIGI-E
lItE
Hydronic Single-Stage Boiler Control
R
Blue (Boiler Output)
White (DHW Pump Output )
Yellow (System Pump Output )
Boiler
SYS
Pump
DHW
Pump
SET
®
C O R P O R A T I O N
R
SYSTEM =
147F
TARGET =
150F
2 Line Alphanumeric Display
Displays sensor values and
menu settings
Output Lights indicate
output status
Display Section Locking Screws
Black (120VAC power)
3 Buttons to operate
the control
®
Elite Series
WARNING
This Heat-Timer control is strictly an operating control; it should never be used as a primary limit or safety
control. All equipment must have its own certified limit and safety controls required by local codes. The installer
must verify proper operation and correct any safety problems prior to the installation of this Heat-Timer control.
Hot Water Control with Outdoor Reset, Set Point,
and DHW for Hydronic Heating Applications
The HWE-Single Stage (HWE-SS) DIGI-SPAN Elite establishes
ambient comfort by varying the temperature of the heating
system’s circulating hot water in response to changes in the outdoor
temperature. In addition, it provides an outdoor temperature based
cutoff, heating system pump control, and domestic hot water (DHW)
pump control. Two new features have been added to this control
including a customized reset ratio curve. A Set Point option was
added for applications where outdoor reset will not apply.
Two sensors are used, one to monitor the outdoor temperature, and
one to monitor the circulating hot water temperature in the heating
system. When the outdoor temperature falls below the Outdoor
Cutoff setting, the heating system is activated and the hot water
temperature is increased proportionally to satisfy the load. Should
it get warmer outdoors, the hot water temperature is automatically
lowered by the control. If the outdoor temperature continues to rise
to the outdoor cutoff setting then the heating system is turned off.
