Prestige Electrical Consumption

Uni R_2

About 60% of the way across I switched from P/S to direct using only the internal circ. High speed is required on the internal circ to do it alone in this case - it has to push through the volute of the idle circ on the heating circuit (it should have a bypass for doing this) and it is contending with a crazy flowcheck that has a partially closed ball valve near it to tune the outboard sound to trolling rather than offshore racing.

Running direct, the boiler takes about 14.6watts on average. I shortened and steepened the reset curve and turned the t-stat up so that it was recovering at 5300rpm (I think that's 100%). It held a steady 22-24 delta T on the climb and I returned the reset curve to normal once the water was up to the mid-150s. While at 5300rpm the consumption was around 135watts. 15 for the computer, 80 for the circ on high and 40 for the blower.

The blips on the end were adding the other circs. I was trying to see if circs in series the same power as P/S. It seemed so.

Uni R_2

Poor man's PC interface...

I hooked up the Prestige to a watt meter to get a handle on total electrical consumption for the heating system. I'm also curious about its cycling patterns. Unlike me, it is still liberated from having to do domestic duties. These figures are for the boiler and one extra circulator running continuously.

The outside air temp was between 40 and 35. The first 80 watts is the 15-58 on speed 2 doing continuous duty (mfr says 80, meter says 79.8 - not bad). Once active, the highest I've seen is 206 watts total which is the same as the Series 100 pump I used to have running continuous (and no idea about the Reillo F3 when it was firing). The internal circ is on low so it should be responsible for 60 watts.

Observations so far:

The computer takes 8-15 watts. The boiler circ stays on when it is cycling (this is annoying with the loud flow check valve and seems like a waste of electricity). The blower motor takes about 25 watts on low fire and goes at least double that. Once I get the domestic in the house rerouted and ready for the new tank, that max number will quickly be known.

According to the planned heatloss calcs, continuous operation isn't possible unless the OAT is around 25 or so.
I'm thinking that a buffer tank will help with the 10 minute on 10 minute off cycles since temps around the 30 to 35F mark are common all winter around here.

Uni R_2

Running Direct

Definitely the lowest cost way for electrical consumption. Under 15watts idle, 95 watts when cycling and 108 watts when firing mostly at around 1950rpm. Projected monthly electric costs are $4 this way, but it is 35-40F weather which is odd. About 8 to 10 watts could be saved on medium speed if the other circ had a bypass and the flow check was gone.

The 10 minute cycling is broken up by long off periods.

The yellow line is my high quality flat-line electric. ;-)

[Deleted User]

What program/devices are you using...

to record this dat Uni? I could use something like this in the field for large 3 phase pumps.

Uni R_2

WattsUp Pro

WattsUp Pro. The Pro includes a serial port jack so that you can dump from the meter into the PC.

Some utilities rent them. Good for logging fridges etc. Most amazing was the cost of using a corded electric lawn mower. Small 110x40 lot but it only takes 2.5 cents to cut it. I did have to put a plug on the boiler circuit to use it.

It being a plug in (well actually a plug in between) takes it out of the 3 phase equation. Good for simple 1800 watt loads or less.

Dave_4

3 days - direct - no setback - temps dropping

Still doing the 10 minute cycles although the time between cycles is reducing as the temps have slowly dropped.

Ultra owners - do your boilers keep the primary circ active when cycling like this?

The CH post pump is set to 01 (00 was also tried to stop this).

It's setback time now - I don't want to hear that outboard motor flowcheck when I'm trying to get to sleep. ;-)

Josh M.

Thanks for the contribution UNI!! With your permission I would like to use this info for sales presentations.

Dave_4

No Probs Josh