11
4
SMART SYSTEM control module
(continued)
B: Temperature settings (boiler only)
B6: Manual reset high limit
The SMART SYSTEM control includes an integrated manual
reset high limit (MRHL) feature, based on the outlet temperature.
The set point for the MRHL is adjusted using parameter
B6
.
The temperature range of this parameter is 32°F (0°C) to 210°F
(99°C) for water heaters and pool heaters, or 240°F (115°C) for
boilers. The default value is 210°F (99°C) for boilers and water
heaters, or 200°F (93°C) for pool heaters.
B7: Auto reset high limit
The SMART SYSTEM control also includes an integrated auto
reset high limit (ARHL) feature, based on outlet temperature.
The ARHL set point is fixed at 205°F (96°C) for water heaters,
and 185°F (85°C) for pool heaters. For boilers, the temperature
range of this parameter is 32°F (0°C) to 235°F (113°C). The
default value is 200°F (93°C).
E: DHW settings
E1: DHW tank set point
When a temperature sensor is installed in the DHW tank, the
DHW tank set point sets the target temperature of the water
in the tank. The user or installer can adjust this set point
by accessing parameter
E1
. The temperature range of this
parameter is 60°F (15°C) to 190°F (88°C). The default value is
120°F (49°C).
E2: DHW boiler set point (boiler only)
When an indirect DHW call for heat becomes active, the control
will use the DHW boiler set point to determine the firing rate
of the unit based on the actual outlet water temperature.
This parameter can be changed by the installer by accessing
parameter
E2
. The temperature range of this parameter is 32°F
(0°C) to 261°F (127°C). The default value is 180°F (82°C).
E3: Minimum tank set point
The minimum allowable tank set point can be adjusted using
parameter
E3
. The temperature range of this parameter is 60°F
(16°C) to the value of parameter E4. The default value is 60°F
(16°C).
E4: Maximum tank set point
The maximum allowable tank set point can be adjusted using
parameter
E4
. The temperature range of this parameter is
60°F (16°C) to the value of parameter E3 to 190°F (88°C). The
default temperature is 190°F (88°C).
A6: SH Night setback times
If parameter A5 is set to anything other than 0°F, the night
setback feature becomes active. This will require start and
stop times to be programmed for the days that reduced
temperatures are required. These times can be changed by
the user or the installer by accessing parameter
A6
. Each day
of the week (Monday through Sunday) will have an on and
off time.
Example:
Monday ON: 22:30, Tuesday OFF: 6:45. If you
wish to skip a day and have no night setback, set the on and
off times to the same time, and prior to 12:00 p.m. To keep
night setback active through the entire day, set the on and off
time to the same time, and after 12:00 p.m. The default times
for each day will be 08:00 (OFF) and 18:00 (ON).
A7: DHW Night setback offset
Once the internal clock has been set correctly, the DHW
night setback feature can be used to program a lower SH
set point during various times of the week. The value of
this parameter will be subtracted from the normal set point
to determine the set point used during night setback. This
parameter can be changed by the user or installer by accessing
parameter
A7
. The temperature range for this parameter is
0°F to 90°F (50°C). The default value is 0°F.
A8: DHW Night setback times
If parameter A7 is set to anything other than 0°F, the DHW
night setback feature becomes active. This will require start
and stop times to be programmed for the days that reduced
temperatures are required. These times can be changed by
the user or the installer by accessing parameter
A8
. Each day
of the week (Monday through Sunday) will have an on and
off time. If you wish to skip a day, set the on and off times to
the same time, and prior to 12:00 p.m. To keep night setback
active through the entire day, set the on and off times to the
same time and after 12:00 p.m.
User’s Information Manual
