Watts tekmar 294 - Settings - Setpoint and Boiler Limits; Constant Setpoint Settings; Remote Setpoint Settings; Boiler Availability Settings

IOM-T-294 2205 © 2022 tekmar
23
Parameter Range Description
DHW TANK
UNOCCUPIED
50 to 230°F
(10.0 to 110.0°C)
Default: 130°F (54.5°C)
Set the DHW tank temperature during the unoccupied period. Available when DHW
Sensor is set On.
DHW TANK
DIFFERENTIAL
1 to 42°F
(0.5 to 23.5°C)
Default: 6°F (3.5°C)
Set the DHW tank differential. The DHW call turns on when the temperature reaches
the DHW Tank Occupied/Unoccupied setpoint minus the DHW Tank Differential.
Available when DHW Sensor is set On.
DHW EXCHANGE
OCCUPIED
50 to 230°F
(10.0 to 110.0°C)
Default: 180°F (82.0°C)
Set the boiler water heat exchanger temperature to heat the indirect DHW tank
during the occupied period. Available when DHW Sensor is set Off.
DHW EXCHANGE
UNOCCUPIED
Off or On
Default: Off
Select if the DHW tank is heated during the unoccupied period. Available when
DHW Sensor is set Off.
INDIRECT DHW
PRIORITY
Off or On
Default: Off
Select if the indirect DHW tank has priority over the central heating load.
INDIRECT
DHW PRIORITY
OVERRIDE
20 to 240 minutes
Default: 240 minutes
Set the DHW priority override time after which central heating is resumed. Available
when Indirect DHW Priority is On.
INDIRECT DHW
SYSTEM PUMP
Off or On
Default: Off
Select if the system pump should operate during an indirect DHW call. Available
when DHW Type is System.
INDIRECT DHW
BOILER LIMITING
1 to 16
Default: 2
Set the maximum number of boilers to respond to a DHW call. The limit does not
apply when there are simultaneous central heating or setpoint calls.
HEATING CALLS > CONSTANT SETPOINT
CONSTANT
SETPOINT
Off or On
Default: Off
Select if there are constant setpoint heating loads.
CONSTANT
SETPOINT
OCCUPIED
50 to 230°F
(10.0 to 110.0°C)
Default: 180°F (82.0°C)
Set the constant setpoint during the occupied period. Available when Constant
Setpoint is On.
CONSTANT
SETPOINT
UNOCCUPIED
Off or On
Default: Off
Select if the Constant Setpoint call is heated during the unoccupied period.
CONSTANT
SETPOINT
SYSTEM PUMP
Off or On
Default: Off
Select if the system pump should operate during a Constant Setpoint call.
HEATING CALLS > REMOTE SETPOINT
REMOTE SETPOINT
Off or On
Default: Off
Select if there are remote setpoint heating loads. Note: When set on, the outdoor
air sensor input changes to measure an EMS analog signal input.
INPUT EMS SIGNAL
0-10 or 2-10
Default: 0-10
Set the EMS analog signal range. Available when Remote Setpoint is On.
INPUT EMS OFFSET
-10 to 10°F
(-5.5 to -5.5°C)
Default: 0°F (0.0°C)
Set the offset from the boiler target temperature interpreted from the EMS analog
input signal. Available when Remote Setpoint is On.
BOILERS 1 TO 16
BOILER AVAILABLE
Off or On
Default: Off
Select if the boiler is available as part of the firing sequence. The boiler should be
set Off if not in use or the boiler is off line for maintenance.
Settings (3 of 8)