B
Bart7974
As I already wrote in one of my former posts
we have ordered our GC but it has not yet arrived.
In the meantime I have continued my research on the GC water system for a better understanding.
The information below is from a German VW forum and VW documentation and could be inaccurate or incomplete. You never know.
The water management in the GC does not consist of a directly controlled water pump with simple on-off switches.
It is a microprocessor controlled system: the customer-specific functional control unit (CFCU)
The CFCU has two sense inputs to control water requests .
Input 1) and input 2), these control 4 request signals
1)-Water tap kitchen- or -the shower tap-
2)-Toilet water- or -shower outdoor-
The water pump is activated
When:
1) is active, i.e. water requested
And
Enough water in the water tank
And
Crafter motor not running
And
Greywater tank not 100% filled.
Or
When
2) is active , i.e. water requested
And
Enough water in the water tank
And
Crafter motor not running
(Greywater tank level not relevant here, because water flows into the toilet tank or outdoors.)
When hot water is requested
then :
- the water pump is activated
- hot water circuit opens at the hot water tap
- cold water from the water tank flows into the Truma boiler and the boiler output
flows through the selected water tap.
Bart
we have ordered our GC but it has not yet arrived.
In the meantime I have continued my research on the GC water system for a better understanding.
The information below is from a German VW forum and VW documentation and could be inaccurate or incomplete. You never know.
The water management in the GC does not consist of a directly controlled water pump with simple on-off switches.
It is a microprocessor controlled system: the customer-specific functional control unit (CFCU)
The CFCU has two sense inputs to control water requests .
Input 1) and input 2), these control 4 request signals
1)-Water tap kitchen- or -the shower tap-
2)-Toilet water- or -shower outdoor-
The water pump is activated
When:
1) is active, i.e. water requested
And
Enough water in the water tank
And
Crafter motor not running
And
Greywater tank not 100% filled.
Or
When
2) is active , i.e. water requested
And
Enough water in the water tank
And
Crafter motor not running
(Greywater tank level not relevant here, because water flows into the toilet tank or outdoors.)
When hot water is requested
then :
- the water pump is activated
- hot water circuit opens at the hot water tap
- cold water from the water tank flows into the Truma boiler and the boiler output
flows through the selected water tap.
Bart