Boiler Stuck on Standby

FrankieS

Today at 2:57 PM
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Boiler was working this morning and for the past 8 years. Now the controller reads Standby. No other activity.

Primary Controller
Honeywell R7284 P1080 on STANDBY
Software Version 19
TT On, Limit Open, Cad Cell 999999 Ohms
Cad Cell
Last Cycle 426 Ohms
Last 10 Cycles 398 ohms
Baseline 165 ohms
Ignition time last 10 cycles 00:01
0 Lockouts since Baseline

Beckett AFG Series Oil Burner

Low Water Cut-Off
Hydrolevel CycleGard CG450-1560

Steam heat.
Hot water on demand.
Neither steam nor HW demands are causing the boiler to ignite.

I replaced the Controller with same as existing.
Ohm-Checked transformer and it is working properly.
There is continuity between the red Burner wire in the LWCO and the red Limit wire in the Controller.

In order to get some heat in the house I change the settings of the controller to TT Open and Limit Closed, put a jumper on the TT terminals of the Controller, and connected the red Burner wire in the LWCO with the orange wire on the P2 terminal.

Burner ignited, ran 10 mins, shut down for a couple of minutes and then ignited again keeping this cycle going for 45 mins. Then the Pressure Relief Valve opened. Whoa !!! That’s an experience. Pressure was only 2.5 psi. Hence it was also replaced today.

I just replaced the LWCO with same. The existing unit’s probe was leaking. And wired it as originally wired. So, now that we have lots of brand new components it should fire right up. NOPE !!!

Thermostat wires (2) are wirenutted to the wire pair coming from the aquastat and go to a transformer - R and G terminals.
When I flip the burner emergency switch to provide power, the transformer clicks once, strong.

Any ideas?

Steamhead

Yes, @FrankieS - call a pro NOW! Where are you located?

FrankieS

NYC

kcopp

Sounds like the boiler may be flooded.

Call a professional to get this squared away asap.

Steamhead

FrankieS said:

NYC

https://heatinghelp.com/find-a-contractor/state/NY

109A_5

Hello @FrankieS,

FrankieS said:

TT On, Limit Open, Cad Cell 999999 Ohms

Probably should call a Pro before something bad happens.

Jamie Hall

If the boiler ran wired as you stated until the pressure relief valve opened... you not only are a very fortunate man -- may I suggest the lottery? -- as bypassing all the safeties and without keeping an eye on a functioning pressure gauge and sight glass and one hand on the emergency switch is likely to result in much more severe consequences than just the pressure relief valve functioning as intended... for you.

Second, by running the pressure up that high you have almost certainly trashed all your vents and if you thermostatic vents, those as well.

May I humbly suggest that, cold or not, you turn the boiler off with the emergency switch and get someone in there to find out what the original problem really was and then make sure that all of the safeties and other controls are wired and function as intended.