tekmar 270 Boiler Control - Manual (Page 20)

© 2010 D 270 - 08/10 20 of 24
Adjust Menu (2 of 2)
Display Description Range
Section Installer Ad
vanced
Actual
Setting
B3
Boiler Modulation Selects either a 2 to 10 V (dc) or a
0 to 10 V (dc) output signal. 2:10, 0:10
Default = 0:10
B3
Minimum Modulation The minimum percent modulation
of the burner. 0 to 50%
Default = 0%
B3
Maximum Modulation The maximum percent modulation
of the burner. 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 Exchange Occupied The minimum boiler supply
temperature to the DHW heat exchanger during the
Occupied period. OFF, 100 to 220°F
(OFF, 38 to 104°C)
Default = 180°F (82°C)
DHW Exchange Unoccupied Selects whether or not a
DHW demand will be responded to during the UnOccupied
period.
OFF, On
Default = OFF
WWSD Occupied The system’s warm weather shut down
temperature during the Occupied period.
35 to 100°F, OFF
(2 to 38°C, OFF)
Default = 70°F (21°C)
WWSD Unoccupied The system’s warm weather shut
down temperature during the Unoccupied period.
35 to 100°F, OFF
(2 to 38°C, OFF)
Default = 60°F (16°C)
C1
Primary Pump Purge The maximum length of time that
the primary pump will continue to operate after the boiler
demand has been removed. OFF, 0:10 to 19:55 min.
(5 second increments)
Default = 0:20 min
C1
Boiler Pump Purge The length of time that the boiler
pump will continue to run after the boiler demand is
removed. OFF, 0:10 to 19:55 min.
(5 second increments)
Default = 0:20 min
The units of measure that all of the temperatures are to be
displayed in by the control. °F,°C
Default = °F