R8182D Mind of its own? or user error?


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Old 11-09-14, 07:32 AM
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R8182D Mind of its own? or user error?

I have the Hi/Lo/Diff set at 160/140/10.

When the thermostat calls the boiler temp is already between 200-210 so the circulator kicks on for maybe 10-20 seconds until the temp drops to 180 then the burner fires up.
The burner and circ continue to run with the temp hovering around ~180 until the thermostat is satisfied then they shut off, but the burner never shuts off on the hi limit no matter what I set it at. When the burner stops the temp in the boiler slowly rises back to 200-210.

It was originally set at 190/170 but the boiler recently started whistling like a teapot so I turned it down to 180/160 and when that didn't help I tried 170/150 and now 160/140 and nothing has appeared to change.

Is there something wrong with this control or my understanding of how this control works?
 
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Old 11-09-14, 07:55 AM
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Welcome to the forums.....



when the thermostat calls the boiler temp is already between 200-210
The boiler should not be 210f if the aquastat is set to 160f... Something is wrong...

but the burner never shuts off on the hi limit no matter what I set it at. When the burner stops the temp in the boiler slowly rises back to 200-210.
Maybe some heat soak after the burner shuts down, but the burner should shut down at 160f.. Like I said, bad aquastat.. Possible a cracked solder joint...

Replace the control..

Whats the make and model of boiler?
Oil-gas?
Zone valves? Circs?

I would assume the boiler heats your hot water?

You may be able to get a better control to save fuel. Additionally now may be the time to install a separate HWH f this is the case and make the boiler cold start..

But it depends on what you tell us...
 
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Old 11-09-14, 08:48 AM
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Thanks for the reply,

The boiler is an old Utica Sf-3100 WT running oil with a beckett afg. It's on a single zone with a 007 circulator.

The tankless coil gives us plenty of hot water even with long showers and the baseboard is maintaining the room temp we set it for.

I just watched the boiler when somebody was in the shower and with no call for heat the burner kicked on at 170 so it seems like both the hi and lo are not matching the settings.
 
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Old 11-09-14, 09:27 AM
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Could be the thermometer on the boiler is not accurate too...

The 8182 control is a 'combination' control and includes the 'oil primary' control, so replacing with something else will mean also adding a primary control to the oil burner. Not a trivial task because it involves a bit of rewiring...

Can you post a few pictures of the system, the oil burner, etc?

But the whistling? that's weird...

Is the system serviced regularly?
 
 

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