21
SC-CF-SBD Owner’s Manual
Jumpers
It is possible to change some parameters of your pack by positioning specific
jumpers located on the board. To access the jumpers, remove the 2 front
cover screws then lift the cover of your pack power box.
2• To change a setting, simply pull
the jumper out and reinsert it in
the desired position.
1• The jumpers are located
on the lower right section
of the board.
Position 2
Position 1
Jumpers
Jumper 1: Current Limiting Option
J
umper 1 is used to limit the current drawn when 2 pumps or a pump and
a blower are used.
Position 1 (HC):
All outputs can be turned on at the same time.
Position 2 (LC)*:
The system will not turn the heater on when one
pump (or blower) is in high speed. The "Heater" icon
will flash on the display to tell the user that there is a
call for heat but the heater is not allowed to start.
Jumper 2: Temperature Unit
This jumper is used to select the temperature unit.
Position 1:
Temperature will be displayed in Fahrenheit degrees.
Position 2:
Temperature will be displayed in Celsius degrees.
Jumper 3: Pumps
Position 1:
Single pump (single pump K-18 or K-19 overlays)
Position 2:
Dual pump or single pump and a blower
(dual pump system K-18 or K-19 overlays)
Note:
It is mandatory that the topside overlay matches
the settings of this jumper
*Mandatory for 120 vac systems
Jumper Selection
