HygroMatik Basic - Explanation of Jumper Functions

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4.4.2 Explanation of Jumper Functions
Jumper A / 1 Step Control or Factory Programmed
If only this jumper is jumpered, the humidifier functions in a 1
step operation (On/Off).
If jumpers A, B and C are open, this is the factory setting for an
external control signal of 0-10 V DC.
Jumper B / External Control Signal 0-20 mA DC or Factory
Programmed
If only this jumper is jumpered, the humidifier expects an exter-
nal control signal of 0-20mA DC.
If jumpers A, B and C are open, this is the factory setting for an
external control signal of 0-10 V DC.
Jumper C / External Control Signal 0-140 Ohm or Factory
Programmed
If only this jumper is jumpered, the humidifier expects an exter-
nal control signal of 0-140 Ohm.
If jumpers A, B and C are open, this is the factory setting for an
external control signal of 0-10 V DC.
Jumper D / Stand-By Blow-Down
If this jumper is jumpered, the “stand-by blow-down” function is
inactive.
If the external control or hygrostat has not ordered any humidifi-
cation from the humidifier for a long while, an automatic stand-by
complete blow-down occurs after a set period (24 hours).
The standard setting for the “stand-by blow-down” function is
active.
Jumper E / Main Contactor Switched Off at Blow-Down
(Function only valid for electrode steam humidifiers)
The state of the circuit for the main contactor is specified with
Jumper E.
Main contactor on: Jumper open
(standard setting)
Main contactor off: Jumper jumpered
The setting “main contactor off” specifies that the electrodes are
disconnected from the power supply during blow-down. This set-
ting may be advisable if the power line is run through a residual
current circuit breaker (FI).