Wolf CGB-2 Series, Installation Instructions For Contractors

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46 3064810_201804
24. Parameter description
The condensing boiler is fine-tuned to the heating system by selecting from 7
programmed system configurations that can only be checked and set directly
on the boiler under parameter HG40 using the AM display module or BM-2
programming unit. This parameter affects the function of the internal appliance
pump, input E2 and output A1.
Parameter HG40
System configuration
When the burner starts or when the boiler switches 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"
HG60 is reduced to the minimum burner hysteresis of 7 K. This is designed to
prevent short burner runtimes.
Parameter HG33
Burner hysteresis runtime
Factory setting: see table
Setting range: 1 to 30 min
Individual setting: _____
In the "Auto" setting, the power supply to 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.
Parameter HG34
eBUS feed
Factory setting: see table
Setting range: OFF to ON
Individual setting:
_____
For setting the type of pump speed control in heating mode, cascade operation
and with BMS.
Constant = Fixed pump speed (HG17)
Linear = Linear pump speed between HG16 and HG17 corresponding to
the current burner output
Spread = Speed control between HG16 and HG17 to achieve the set flow/
return temperature spread (HG38)
Parameter HG37
Type of pump control
Factory setting: see table
Individual setting:
_____
The set spread specified in HG38 applies if dT pump control unit is enabled in
parameter HG37. The change to the pump speed means the spread is regulated
between flow and return within the speed limits in HG16 and HG17.
Parameter HG38
Set spread, pump control
Factory setting: see table
Setting range: 0 to 40 °C
Individual setting: _____
In heating mode, the burner is run at a lower output for the set time after burner
start.
Parameter HG39
Soft start time
Factory setting: see table
Setting range: 0 to 10 min
Individual setting:
_____