Watts tekmar 289 - Settings - System; System Menu Parameters

21
Settings (4 of 5)
Parameter Range Description
SYSTEM MENU
CONDENSATE
SENSOR
Off or On
Default: On
Select if a condensate return sensor is installed.
STEAM
ESTABLISHED
100 to 220 °F
(38.0 to 104.5 °C)
Default: 180 °F, (82.0°C)
Set the condensate return temperature at which steam reaches the furthest radiator.
AUTO COOL DOWN
Off or On
Default: On
Select if the radiators should cool down before starting the next heating cycle.
COOL DOWN
DIFFERENTIAL
5 to 110°F
(3.0 to 61.0°C)
Default: 25°F (14.0°C)
Select the amount of temperature drop on the condensate return sensor below the
steam established temperature before starting the next heating cycle.
MINIMUM ON TIME
0 to 50 minutes
Default: 0 minutes
Select the minimum run time to establish steam if a condensate return sensor is
not installed.
AUXILIARY SENSOR Off, Indoor, Flue
Select the type of sensor connected to the auxiliary sensor input.
Indoor: Measures ambient room temperature.
Flue: Measures the boiler flue vent temperature.
EARLY START
Off or On
Default: Off
The control learns the heat up rate of the building and advances the heating before
the occupied period. Requires an indoor sensor and schedule.
BOOST
Off or On
Default: Off
Select the extra run time after the unoccupied period ends to recover the temperature
of the building. Requires a schedule and an indoor sensor is not installed.
BOOST TIME
20 to 480 minutes
Default: 120 minutes
Select the maximum Boost extra run time after a unoccupied period.
SMART SETBACK
Off or On
Default: Off
Select if the scheduled unoccupied period is skipped if the boiler run time percent
is more than 85% of the heating cycle.
PRESSURE SENSOR
Off or On
Default: Off
Select if a pressure sensor is installed.
PRESSURE TARGET
0.0 to 15.0 psi
(0 to 105 kPa)
When staging two boilers, select the pressure to turn off the second boiler.
STAGE 2
DIFFERENTIAL
0.1 to 5.0 psi
(7 to 35 kPa)
When staging two boilers, select the pressure differential to turn on the second boiler.
STAGE DELAY 0.0 to 40.0 minutes Select the time delay when staging the second boiler.
COMBUSTION AIR
DELAY
0 to 360 seconds
Default: 0 seconds
Set the time that the combustion air damper is open before turning on the first boiler.
BOILER ROTATION
Off or On
Default: Off
Select if equal runtime rotation is used on the boilers.
OUTDOOR SENSOR
Control, Internet
Default: Control
Set the source of the outdoor air sensor reading. Internet is available when connected
to the Internet through Ethernet or Wi-Fi.