tekmar 263 Boiler Control - Manual (Page 28)

© 2009 D 263 - 03/09 28 of 36
Adjust Menu (2 of 3)
Display Description Range
Section Installer Ad
vanced
Actual
Setting
B2
B3 Boiler Differential The temperature differential that the
control is to use when it is operating the boiler(s).
Au, 2 to 42°F
(Au, 1 to 23°C)
Default = Au
Boiler 1 Selects whether or not boiler 1 is operational.
This item is only available in operating mode 1.
Au (automatic), OFF
Default = Au
Boiler 2 Selects whether or not boiler 2 is operational.
This item is only available in operating mode 1.
Au (automatic), OFF
Default = Au
B3
Motor Speed The amount of time required for the modulating
actuating motor to fully open the gas valve or operate the fan
speed from a stopped position to full speed.
This item is only available in operating mode 2.
10 to 230 seconds
Default = 30
B3
Boiler Modulation Selects either a 4 to 20 mA or a
0 to 20 mA output signal.
This item is only available in operating mode 2.
4:20 to 0:20
Default = 4:20
B3
Minimum Modulation The minimum percent modulation
of the burner.
This item is only available in operating mode 2.
0 to 50%
Default = 0%
B3
Maximum Modulation The maximum percent modulation
of the burner.
This item is only available in operating mode 2.
50 to 100%
Default = 100%
E1
E2
DHW Mode Selects the DHW mode of operation.
1 (parallel, no priority),
2 (parallel, priority),
3 (pri-sec, no priority),
4 (pri-sec, priority)
Default = 1
DHW Occupied The target DHW tank temperature during
the Occupied period.
This item is only available when the DHW Sensor / Off
DIP switch is set to DHW Sensor.
OFF, 70 to 190°F
(OFF, 21 to 88°C)
Default = 140°F (60°C)
DHW Unoccupied The target DHW tank temperature
during the Unoccupied period.
This item is only available when the DHW Sensor / Off
DIP switch is set to DHW Sensor and the Setback / None
DIP switch is set to Setback.
OFF, 70 to 190°F
(OFF, 21 to 88°C)
Default = OFF
DHW Differential Sets the DHW differential temperature
for the DHW tank temperature.
This item is only available when the DHW Sensor / Off
DIP switch is set to DHW Sensor.
1 to 42°F
(1 to 23°C)
Default = 6°F (3°C)
DHW Exchange Occupied The minimum boiler supply
temperature to the DHW heat exchanger during the
Occupied period.
This item is only available when the DHW Sensor / Off
DIP switch is set to Off.
OFF, 100 to 220°F
(OFF, 38 to 104°C)
Default = 180°F (82°C)