Y Plan heating and Hot water not functioning correctly

[Techno007]

Hi Guys,
Good evening everyone.
I recently installed the heat only boiler where the system is gravity fed, I also installed 3-port diverter valve, previously heating and hot water working on
gravity fed. I installed the pump as well and did the Y Plan on the system. The system is working fine but the customer made some notice that
1). When Heating is ON and HW is OFF
Heating and HW both comes on, Heating is moderately warm and HW is piping hot all the time.
2) When Heating OFF and HW is ON
Water gets hot very quickly but does not reheat if all HW used or cool down then specified on cylinder stat.
3) When heating ON and HW ON
Heating comes on but the HW does not come ON. Heating much hotter then said in (1).

Kindly someone out there who can help me to put it right. Thanks in advance.

 

[Aquarius]

Is it a diverter system or a 3 port mid position as you’ve mentioned both.

 

[EvilDrPorkChop]

Hi Guys,
Good evening everyone.
I recently installed the heat only boiler where the system is gravity fed, I also installed 3-port diverter valve, previously heating and hot water working on
gravity fed. I installed the pump as well and did the Y Plan on the system. The system is working fine but the customer made some notice that
1). When Heating is ON and HW is OFF
Heating and HW both comes on, Heating is moderately warm and HW is piping hot all the time.
2) When Heating OFF and HW is ON
Water gets hot very quickly but does not reheat if all HW used or cool down then specified on cylinder stat.
3) When heating ON and HW ON
Heating comes on but the HW does not come ON. Heating much hotter then said in (1).

Kindly someone out there who can help me to put it right. Thanks in advance.

Are you Gas Safe?

 

[Techno007]

Is it a diverter system or a 3 port mid position as you’ve mentioned both.

It is 3 port mid position

 

[Techno007]

It is 3 port mid position

i am gas safe registered engineer

 

[green grant]

a gas safe registered "engineer" and you can't make the simple diagnosis as to why its not working as you "expected" I find that hard to believe.

 

[Techno007]

a gas safe registered "engineer" and you can't make the simple diagnosis as to why its not working as you "expected" I find that hard to believe.

You are saying that you can solve all the problems, i dont believe rather than questioning why dont you solve the problem if you really that expert. I doubt it if you are any better.

 

[John.g]

If wired like this should work with new valve.

 

[Murdoch]

I'd say the wiring and / or the valve(s) are wrong