New CH install - couple of questions - newbie

[Ray Stafford]

most of that was right over my head but correct me if im wrong
energy saving mean we can only fit the new type of pumps
the new types of pumps need a non automatic bypass
part L demands we fit a automatic bypass

Or put on an A rated pump, but one that has a fixed speed setting. 🙂

 

[doitmyself]

if I buy and fit this Taco device in Series with the ABV What do i set the pump mode to be?? CP or PP or fixed speed afterwards?

You set the pump to the appropriate PP.

Normally the ABV will be closed, so there is no flow through the bypass. If the pressure exceeds the setting on the ABV, the valve will open and allow flow through the bypass. If the pressure increases any further the Taco Setter will limit the flow in the bypass circuit.

WB do not state a minimum flow rate, so it might be worthwhile contacting them and asking their advice on the correct setting of the ABV and Taco Setter.

 

[jrcsheffield]

You set the pump to the appropriate PP.

Normally the ABV will be closed, so there is no flow through the bypass. If the pressure exceeds the setting on the ABV, the valve will open and allow flow through the bypass. If the pressure increases any further the Taco Setter will limit the flow in the bypass circuit.

WB do not state a minimum flow rate, so it might be worthwhile contacting them and asking their advice on the correct setting of the ABV and Taco Setter.

Hello again….you will recall I am trying to use a Grundfos Alpha2L in Proportional Pressure 2 mode on my newly installed central heating system in order to achieve maximum cost efficiencies from the pump and heating system. Unfortunately an auto bypass valve has been installed by my plumber.
From my conversations with Grundfos and doitmyself on this forum , I am advised that I can use the Worcester Bosch Greenstar 18RI and the Grundfos Alpha2L in PP mode but I will need to fit a Taco Setter (flow regulator and gauge) in series with the Automatic Bypass Valve.

WB have advised me that the minimum boiler flow rate is 5 litres per minute so, using the pump tables I have set my ABV to 0.25mb.

I do not understand what I should set the Taco Setter to? I am guessing 0.25mb???

Can you also advise if the Taco Setter should come in any series connected order ie: pump outflow – Taco-Setter - ABV – return pipe work or pump outflow – ABV - Taco Setter - return pipe work.

Does it matter?

I think I am amost there once I have these pieces of information I will try to purchase a Taco Setter.

Thanks John

 

[lame plumber]

if your going to the trouble of fitting a taco setter as mentioned, why not fit a gate valve instead of the auto bypass. Its omho but your trying to establish a system running as efficiently in the manner that car manufacturers tell us their vehicle efficiencies are in perfect conditions, overall your just wasting your time, as a bit of corrosion and sludge will soon mean you have to reset the whole setup in 6 months time!

 

[Ermintrude]

if your going to the trouble of fitting a taco setter as mentioned, why not fit a gate valve instead of the auto bypass. Its omho but your trying to establish a system running as efficiently in the manner that car manufacturers tell us their vehicle efficiencies are in perfect conditions, overall your just wasting your time, as a bit of corrosion and sludge will soon mean you have to reset the whole setup in 6 months time!

Yep u want as few variables as possible otherwise every one is going to be adjusting every 3 seconds. Get rid of auto bypass and install a manual buy pass old skool.