The customer will be really chuffed with this new transplant, much easier to control. Why have you got flow control valves on the cylinders? Does Viessman not have the native capability to control on two cylinders?
Well originally I thought I was being smart and that by using an emp1 extension that I would get a hot water loading signal. Now I think I was wrong. I'm back on this job in 10 days time so I'm looking for a new strategy
@@andrewmillwardwatford9410 if you have to have the valves then i have a solution for you. What i would do is when the cylinder calls for heat, the valve activates a simple relay which makes the connection on the cylinder sensor. and when the valve is not power the relay reverts to its default position which goes through a resistor which tricks the boiler into thinking the hot water is satisfied.
do you have to have 2 port valves? i normally just wire the cylinder sensor through the overheat stat, so if it ever overheated (which it wont) it would disconnect the sensor which would stop the boiler from firing in hot water mode. heating would still work
@@cliveramsbotty6077 they are. Although at the moment I don't have the correct signal it is passing through the overhead stats. I have temperature control on both cylinders via cylinder sensors but I have linked both hydraulic lead to both boilers so there is some small discrepancy in temperature control. I need to find a solution for this problem in time for my return in 2 weeks time
Good job Andy, let me quote for the lagging. You the man. Keep up the good work.
The customer will be really chuffed with this new transplant, much easier to control. Why have you got flow control valves on the cylinders? Does Viessman not have the native capability to control on two cylinders?
The zone valve are required to comply with G3 as the cylinders are not manufactured by v i e s s m a
What are you using to activate the 2 port valves on the cylinders?
Well originally I thought I was being smart and that by using an emp1 extension that I would get a hot water loading signal. Now I think I was wrong. I'm back on this job in 10 days time so I'm looking for a new strategy
@@andrewmillwardwatford9410 if you have to have the valves then i have a solution for you. What i would do is when the cylinder calls for heat, the valve activates a simple relay which makes the connection on the cylinder sensor. and when the valve is not power the relay reverts to its default position which goes through a resistor which tricks the boiler into thinking the hot water is satisfied.
do you have to have 2 port valves? i normally just wire the cylinder sensor through the overheat stat, so if it ever overheated (which it wont) it would disconnect the sensor which would stop the boiler from firing in hot water mode. heating would still work
@@cliveramsbotty6077 they are. Although at the moment I don't have the correct signal it is passing through the overhead stats. I have temperature control on both cylinders via cylinder sensors but I have linked both hydraulic lead to both boilers so there is some small discrepancy in temperature control. I need to find a solution for this problem in time for my return in 2 weeks time
@@alexbennett8437
I’ve done it by wiring the boiler via the overheat stat which just kills everything.
Super safety and all that.
Are they 4 pipes heat only boiler? One side for heating and one for hot water?
Yes the boiler has its own diverter valve on the flow side of the boiler