Wolf FB363 Betriebsanleitung PDF herunterladen (Seite 39)

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A blocking time is provided that prevents further boilers/heating

stages from being started, to prevent boilers/heating stages

frequently cycling ON and OFF. An additional boiler/burner

stage can only be started after the blocking time has expired.

This blocking time does not apply to the lead boiler, if there is a

DHW demand or convector heater demand from the cascade or

mixer modules.

KM 07 Blocking time

After the adjustable burner hours run gure has expired, the

current lead boiler changes, if parameter

KM 08 "Setting C"

has been selected, the boiler sequence between A and b;

when "Setting d" has been selected, the next boiler in rotation

becomes the lead boiler. That boiler is lead boiler, whose

cascade module is switched ON rst in the cascade and is shut

down last. Precondition for an automatic changeover of boiler

sequence is the selection of a boiler sequence (parameter

KM 12) = C or d.

The internal hours run meter for the boiler sequence

changeover is saved daily (0:00 h) to a non-volatile memory.

The last value saved is downloaded in case of power failure.

Any reset at the KM (= loading standard values) returns the

internal hour count to zero.

KM 08 Hours until a

boiler sequence change

Setting the P portion of the PI controller for header temperature.

Parameter value

km 09 increase ⇒

header temperature control responds more slowly

Parameter value km 09 reduce ⇒

Header temperature control responds more quickly

KM 09 1/Kp header

temperature control

start

Setting the P portion of the PI controller for header temperature.

For a description, see parameter

km 09

KM 10 1/Kp Header

temperature control

stop

Setting the I portion of the PI controller for header temperature.

Parameter value

km 11 increase ⇒

header temperature control responds more slowly

Parameter value km 11 reduce ⇒

header temperature control responds more quickly

KM 11 Tn Header

temperature control

The "Maximum ow temperature" parameter limits the set

header temperature of the heating circuits (mixer circuits and

direct heating circuits) upwards. Parameter

km 03 takes priority.

KM 04 Maximum

ow temperature

The "Minimum header temperature" parameter limits the set

header temperature downwards.

KM 05 Minimum

ow temperature

If only one boiler/burner stage is still in operation, that boiler/

burner stage will be shut down if the following applies: Actual

header temperature > set header temperature + hysteresis.

KM 06 Hysteresis

header temperature

Parameters / Function description

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