9
HWE-SS Elite Installation and Operation Manual
• For example; when the calculated temperature is 160°F and the Setback is set to 20°F, a setback call
will change the Set Point to (160v - 20°F) 140°F.
• 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.
• The Setback is activated by closing/shorting the P+ and P- terminals using an external timer.
Boost
Options:
Yes, No
Default: No
SET
SET
SET
SET
SET
SET
/Settings>/Setback/Boost.
• The morning Boost is designed to return the building to comfortable ambient temperatures after the
Night (Setback) period. The HWE-SS will accomplish this by running elevated water temperatures
(will add Setback setting to calculated water temperature) for 30 minutes after the opening of the
setback terminals P+ and P-. That is, if the normal set point at a specific outdoor was 145˚F and
the Setback setting was 20˚F, the boost will raise the system calculated temperature to 165˚F for 30
minutes after the setback.
Boost:
No
Yes
System and Outdoor Trim
Options:
From -20F
º
/-11
Cº
to +20F
º
/+11
Cº
Default: 11F
º
/6
Cº
SET
SET
SET
SET
SET
SET
/<Maintenance>/Sys. Trm or Out. Trim
• The Heat-Timer sensors are very accurate. However, sometime it might be beneficial to adjust
the values to match and existing system. The System and Outdoor Trim values adjust the System
Sensor and Outdoor Sensor readings using positive or negative values.
System Trim:
+0 F
Outdoor Trim:
+0 F
Enable/Disable Input
• The HWE-SS 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.
N.O.
S.P.S.T. Output Wiring
120VAC Power Wiring
120VAC Power Source
BLACK
BLACK
Boiler
Output Wiring
N.O.
YELLOW
T1
T2
T3+
COM
COM
T3- EXT+ EXT- P+ P- COM 24VAC
24V
AC
Comm
24VAC Power Wiring
Shield
Shield
System T
emp
Outdoor Sensor
Sensor Wiring
T1
T2
T3+
COM
COM
T3- EXT+ EXT- P+ P- COM 24VAC
Enable/Disable
Wiring
T1
T2
T3+
COM
COM
T3- EXT+ EXT- P+ P- COM 24VAC
Input Terminals
{
{
{
{
{
{
Temp
er
atur
e S
ensor
30°F - 250°F
Temp
er
atur
e S
ensor
30°F - 250°F
Temp
er
atur
e S
ensor
150°F - 950°F
Ex
ter
nal Enable/D
isable
Shut
do
wn
Pr
essur
e,
V
acuum,
and
4 -20mA
24V
A
C P
o
w
er Supply
N.O.
ORANGE
System Pump
Output Wiring
N.O.
VIOLET
DHW Pump
Output Wiring
T1
T2
T3+
COM
COM
T3- EXT+ EXT- P+ P- COM 24VAC
DHW Call
Wiring
T1
T2
T3+
COM
COM
T3- EXT+ EXT- P+ P- COM 24VAC
Setback/Boost
Wiring
SYSTEM=
55 F
TSTAT OPEN
SYSTEM=
SHORT
TSTAT OPEN
