tekmar 268 Boiler Control - Manual (Page 27)

27 of 32 © 2010 D 268 - 11/10
Adjust Menu (3 of 4)
A
Boiler Minimum - The minimum allowed boiler target
temperature.
OFF, 80 to 180°F
(OFF, 27 to 82°C)
Default = 140°F (60°C)
A
Boiler Maximum - The maximum allowed boiler
target temperature.
120 to 225°F, OFF
(49 to 107°C, OFF)
Default = 200°F (93°C)
B1
Fire Delay 1 - The time delay the control can expect
between the time that the relay contact closes to fire the
first stage of the boiler and the burner actually fires. 0:00 to 3:00 minutes
(1 sec increment)
Default = 0:10 min
B1
Fire Delay 2 - The time delay the control can expect
between the time that the relay contact closes to fire the
third stage of the boiler and the burner actually fires.
This item is available in Modes 5 to 8.
0:00 to 3:00 minutes
(1 sec increment)
Default = 0:10 min
A
Combustion Air Damper Delay - The time allowed
for the combustion air damper to open before the first
stage is fired.
This item is only available if the Alert / C.A. DIP switch
is set to C.A.
0:00 to 3:00 minutes
(1 sec increment)
Default = 1:00 min
B1
Boil Mass - The thermal mass characteristics of the
boilers that are being used. 1 (Lo), 2 (Med), 3 (Hi)
Default = 2
B1
Stage Delay - The minimum time delay between the
operation of stages.
Au (Auto), 0:30 to
19:55 min (5 second
increment)
Default = Au
B1
Boiler Differential - The temperature differential that
the control is to use when it is operating the boiler(s).
Au (Auto), 2 to 42°F
(Au, 1 to 23°C)
Default = Au
B1
Staging - Selects the firing sequence of the stages
when using multi-stage boilers.
This item is only available in Modes 3 to 7.
lohi, lolo
Default = lohi
E1
DHW Mode Selects the DHW mode of operation.
This item is only available when the last boiler in MODES
1, 4 and 5 is set to OFF.
OFF
1 (parallel, no priority),
2 (parallel, priority),
3 (pri-sec, no priority),
4 (pri-sec, priority)
Default = OFF
E1
DHW Exchange Occupied The minimum boiler supply
temperature to the DHW heat exchanger during the
Occupied period. (This item is only available when the
last boiler in MODES 1, 4, and 5 is set to OFF and DHW
MODE is set to 1 through 4.)
OFF, 100 to 220°F
(OFF, 38 to 104°C)
Default = 180°F (82°C)
E1
DHW Exchange Unoccupied Selects whether or
not a DHW demand will be responded to during the
UnOccupied period. (This item is only available when
the last boiler in MODES 1, 4, and 5 is set to OFF and
DHW MODE is set to 1 through 4.)
OFF, On
Default = OFF
Display Description Range
Section Installer Ad
vanced
Actual
Setting