Slant/Fin SC-3 - Manual (Page 14)

15 SC-3 Controller
Boiler Maximum - The maximum allowed boiler target temperature. Set at least 10˚F
above Boiler Design setting.
Press the Menu button until ADJUST is visible on the top line of display. Press the
Item button until BOIL and MAX appears. Use the up and down arrow buttons to change
to the desired temperature.
Range Available: 120˚ to 225˚F or OFF (49˚ to 107˚C or OFF)
200˚F
(93.5˚C)
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.
Press the Menu button until ADJUST is visible on the top line of display. Press the
Item button until F DLY appears. Use the up and down arrow buttons to change to
the desired time delay.
Range Available: 0:00 to 3:00 minutes (1 sec increment)
0:10
min
Boiler Mass - This inputs the thermal mass characteristics of the boiler modules.
Press the Menu button until ADJUST is visible on the top line of display. Press the
Item button until BOIL is below ADJUST and MASS is to the right of ADJUST. Default is
2 with 1 being low mass and 3 being high mass. For Slant/Fin boilers we recommend you
retain the default setting of 2.
2
Stage Delay - The minimum time delay between the operation of stages. Under Au
(Auto) setting the control determines the best stage delay based on operation of the
system.
Press the Menu button until ADJUST is visible on the top line of the display. Press the
Item button until STG DLY appears. Use the up and down arrow buttons to change to the
desired setting.
Range Available: Au (Auto), 0:30 to 19:55 min (5 sec increment)
Au
Boiler Differential - The temperature differential that the control is to use when it is
operating the boiler(s). Under Au (Auto) the control determines the best differential as
the load changes. This reduces potential short cycling during light load conditions.
Press the Menu button until ADJUST is visible on the top line of the display. Press the
Item button until BOIL and DIFF appears. Use the up and down arrow buttons to change
to the desired setting.
Range Available: Au (Auto), 2˚ to 42˚F (Au, 1˚ to 23˚C)
Au
The following step will happen only when module step 3 is set to OFF
DHW Mode - Selects the DHW MODE of operation. This item is only available when
Boiler 3 is set to OFF.
Press the Menu button until ADJUST is visible on the top line of the display. Press the
ITEM button until MODE and DHW appear. Keep setting on OFF.
Range Available: OFF
1 (parallel, no priority)
2 (parallel, priority)
3 (pri-sec, no priority)
4 (pri sec, priority)
Default = OFF
OFF OFF
If you change setting of DHW MODE to 1, 2, 3, or 4 you will go to (XCHG) a different step than the next step.
If this happens go back to DHW MODE and change setting to OFF.
Setpoint Mode - Selects the Setpoint Mode of operation. This item is only available
when DHW MODE is set to OFF.
Press the MENU button until ADJUST is visible on the top line of the display. Press the
ITEM button until MODE and SETP appear. Keep setting on 1.
Range Available: 1 (parallel, no priority)
2 (parallel, priority)
3 (Primary pump)
Default = 1
1
Display Description
Default
Setting
New
Setting
SPACE HEATING ONLY WITH OUTDOOR RESET