Boiler wont fire unless..

Karamike

Hello



Emptied boiler to install some baseboard



Was not able to finish due to schedule,so I isolated 2 heat zones and left DHW alone



Boiler will now only fire if I manually open zone valve for DHW?



Boiler is "Purepro" with Beckett burner



Any ideas help is appreciated

Paul48

I'm

not following you.........If the boiler is empty, do not fire it. If you have an indirect water heater, it uses boiler water to heat domestic hot water. If you dry-fire that boiler, you'll destroy it.

Karamike

Boiler was refilled

Filled boiler to 15 psi before boiler was fired



Boiler is equiped with Honeywell L7224 aquastat



Also,boiler will fire when basement heat zone is calling..but does not fire for DHW when temp drops unless I manually open zone valve for it



Any help is appreciated

STEVEusaPA

Do you have....

A coil for DHW, or an indirect?

If a coil, then you have to troubleshoot your control.

If you have an indirect, you may still have air in the piping, or once again, troubleshoot the control

Karamike

Indirect

Superstor..

EddieG

How...

How many wires are going to zone valve? My guess is that you are not sending 24 volts to the valve or the valve head is bad. By manually opening it, you are closing the end switch. Which tells the boiler to fire.

Karamike

2 brown

with 3 white and 3 red wires connecting to zone valve

LIBob51

Is there

A LWCO in the system?

Karamike

Ended up..

being a faulty aquastat on the domestic

earl burnermann

fix the problem

that is causing the zone valve not to open on temperature drop.