Wolf MGK-2-390 Installation Instructions Manual page 44

Parameter HG33
Burner hysteresis runtime
Factory setting:
see table chap. 24
Control unit parameters
Individual settings: ________
Parameter HG34
eBUS feed
Factory setting:
see table chap. 24
Control unit parameters
Individual settings: ________
Parameter HG37
Pump control type
Factory setting:
see table chap. 24
Control unit parameters
Individual settings: ________
Parameter HG38
Set dT pump control unit
Factory setting:
see table chap. 24
Control unit parameters
Individual settings: ________
Parameter HG39
Soft start time
Factory setting:
see table chap. 24
Control unit parameters
Individual settings: ________
44
25. Parameter description
When starting the burner or changing to heating mode, the burner hysteresis
is set to the parameter "Burner switching differential" HG01. Based on this set
value, the burner hysteresis within the set "Runtime burner hysteresis" HG33
is reduced to the minimum burner hysteresis of 7 K. This is designed to prevent
short burner runtimes.
In the "Auto" setting, the power supply of the eBUS system is switched ON or
OFF automatically by the control unit, depending on the number of available
eBUS subscribers.
OFF = BUS feed is always switched OFF
ON = BUS feed is always switched ON
Auto = the control unit switches the bus feed ON or OFF automatically
For setting the type of pump speed control in heating mode and with BMS.
Constant = fixed pump speed (HG17)
Linear = linear pump speed between HG16 and HG17 corresponding to
the current burner output
dT = speed control between HG16 and HG17 to achieve flow/return
temperature spread (HG38)
If dT pump control unit is activated in parameter HG37, the set dT specified in
HG38 applies. The change to the pump speed means the dT is regulated
between flow and return within the speed limits in HG16 and HG17.
In heating mode, the burner is run at a lower output for the set time after burner
start.
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