6
Outdoor Reset Mode
• When Output-On is selected, the HWE-SS will energize the boiler and system relay when System reads Short or Open and Outdoor
is below Outdoor Cutoff. Thus, the boiler will run on its limits. However, if the Outdoor sensor fails and the Outdoor reads Short or
Open, the HWE-SS will change the Target Set Point to the Max Water Temperature.
• When Output-Off is selected, the HWE-SS will turn the boiler Off when the System sensor reads Short or Open. However, when
the Outdoor sensor fails, reads short or open, the HWE-SS will change the Target Set Point to be the Min Water Temperature.
Set Point Mode
• When Output On is selected, the HWE-SS will turn the boiler On when the System sensor reads Short or Open.
• When Output-Off is selected, the HWE-SS will turn boiler Off 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.
Setting the Control to Factory Default
To Reset the HWE-SS control to its original factory defaults, power down the control. Hold down the
SET and DOWN buttons while powering the control back up until the Loading Default Values screen
appears. The Display will direct you to the Startup menu after the defaults are loaded to program the
control.
SET
SET
SET
SET
SET
SET
Loading Default
Values...
NOTE:
When resetting the control to original factory defaults all control settings will be over written and will no longer exist.
Default Display
The default display will show the current System temperature and the Target temperture. In addition,
by clicking the Up or Down button, the display will show the current Outdoor temperture and the
Outdoor Cutoff.
Operating Menu Options
(Click SET Button)
SYSTEM=
148 F
TARGET=
150 F
SET
SET
SET
SET
SET
SET
SET
SET
SET
SET
SET
SET
Outdoor=
48 F
Cutoff=
65 F
Set Point (Available when Startup Control Mode = Set Point)
Options:
From -10ºF/-23
º
C to 230ºF/110
º
C
Default: 70
º
F/21
º
C
SET
SET
SET
SET
SET
SET
/Set Point
• The Set Point option provides the user with an adjustable fixed Target temperature to control the
system. If an Outdoor Sensor was connected, the next menu option will show the Outdoor Cutoff,
otherwise there will be no Outdoor Cutoff option.
• The Set Point less the Differential should be set above the boiler manufacturer minimum water
temperature requirements.
Set Point:
70 F 140 F
SYSTEM=
68 F
TARGET=
140 F
Outdoor Reset (Available when Startup Control Mode = Outdoor Reset)
Options:
From 1(8.00º/1.00
º
) to 12(1.00º/4.00
º
), Custom
Default: 7(1.00º/1.00
º
)
SET
SET
SET
SET
SET
SET
/<Out. Reset>/Reset Ratio
• The Reset Ratio determines how the System water temperature will vary with Outdoor temperature
(OD). With any of the ratios, the colder it becomes outside, the hotter the temperature of the system
water. The Ratio is measured as; Outdoor : System Water temperature.
• With a 1.00:4.00 ratio, the System water temperature will increase rapidly as the outside
temperature falls, hitting the maximum water temperature of 240°F at 24°F outdoor temperature.
With a 4.00 (OD):1.00 (SYS) ratio, the System water temperature (SYS) will increase slowly as the
outside temperature falls.
• The Reset Ratio controls the amount of heat that enters the heating system based on the outdoor
temperature. A higher numbered Reset Ratio will result in a higher Calculated water temperature.
See the Reset Ratio chart on the second page. If the application has radiant heat, a lower numbered
Reset Ratio curve should be selected.
Reset Ratio O/S:
Custom
1(8.00 : 1.00)
2(4.00 : 1.00)
3(3.00 : 1.00)
4(2.00 : 1.00)
5(1.50 : 1.00)
6(1.25 : 1.00)
7(1.00 : 1.00)
8(1.00 : 1.25)
9(1.00 : 1.50)
10(1.00 : 2.00)
11(1.00 : 3.00)
12(1.00 : 4.00)
