System 2000 question

chapchap701

I was just looking at the pictures of the EK-3 install you did . I see the manager there but only the 5 zone one; does this model work like the other models: cold, preheat, heat, purge? I think I saw the bypass in the back there. I guess the supply is in the back and the return on the top. Does the EK-3 have a puff switch? I'm assuming this one is not firing a Riello. What burner does this one have in it? Can it use any of the big 3?

RianS

System 2000 question

I just took on a new residential account with a system 2000 oil boiler. Electric water heater converted to indirect and 3 hydro coils. Is it normal for the last zone to call for heat to be used to pump down boiler temp.? I thought it should be directed to the indirect. I only have 2 other customers with system 2000 boilers and have never had any problems with them. This new one seems to be a lemon. Thanks for any help. Rian S

Rocky_2

Rian, yes....

The last zone to call will be the recipient of the post purge, whether it be a heating zone or the indirect. Only way the water tank will be the post purge target is if it was the last zone to call.
regards,
Rocky

Joe Brix

Disappointed with EK

on their manager not being more like a Tekmar. Post purging the boiler heat to the last heating zone sounds like a way to overshoot the thermostat and people will notice larger temp swings. Just send the BTU's to the tank
instead. I also think that some kind of outdoor reset should be offerd also.

RianS

Your right Joe, it does over shoot the set temp. The zone in question heated to 75 when t-stat was set at 70. Also the hydro coil in the attic turns the fan off on a timer after call is done so the boiler keeps sending heat up to it even though the fan isnt running. Seems like such a waste of heat. RianS

Joe Brix

Maybe

there's a way to force post purge just to the tank with a dip switch setting or something? They show hydro-air setups in their literature and you're right, it that case pushing heat to a coil with no blower on is a waste. Email or give them a call. I might have to get a system 2K myself since I can't find an installer knowlegeable enough to put a low mass steel boiler in with a Tekmar control on Long Island.
I guess if it's not simple and pre-packaged, no one wants to think "outside the box".

Rudy

system 2000

please call energy kinetics and talk to a rep.the unit is supposed to send the heated thru the hot water heating tank.

techheat_2

How can it use the water heater to dump latent heat? As soon as the boiler cooled below the temp of the domestic,the domestic would heat the boiler

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Joe Brix

A tekmar 260

would only purge for 4 minutes max or stop when the boiler water temp dropped to 160°. I assume the System 2K manger does something similar.

Richard_4

EK2000 dip switches

should be set acordingly. switches #5,6,7,& 8 should be in the on setting for a five min. energy recovery. off setting is 20 min. also, the heat antisipator on t-stat should be set at o.2 amps...Richard...PS installed over 25 EK 2000, on lemons yet.

Alan_11

system 2000

If this is an older unit with the classic manager the bottom zone on the manager should only have a 5 min purge time. Also, If the aquastat on the return is a White rodgers 11c-30 and wired properly it will close all zone valves when return water temp drops below set point.changing to this type triple aquastat helps reduce the buildup of condensate in the flue passages. Simple to change to, and boiler stays much cleaner. Put in hundreds in last 20 years. Just finished ek-3 job last week

Robert O'Connor_3

System 2000 question

System 2000 always post-purges to the last zone that called whether heat or hot water. With the heat anticipators correctly set at .1a, the heating zone will not over heat. Remember that the burner is off during post purge and that heat loss from the dwelling continues. Post purge stops when the return temp has dropped to a point when heat transfer is minimal or 20 minutes, whichever is first. Hot water has a maximum post purge of 5 minutes. Heat zone post purge can be shortened to 5 minutes via dip switches if the zone does overheat. Always post purging to the HW tank would cause overheating and is opposed to the concept that the heat energy should be put where you wanted it. Rian, if your t'stat overshot by 5º something else was wrong. The remaining energy is not enough to do that. As for air handler operation, the blower should be controlled by the manager output, generally a 4 wire zone valve with the end switch starting the blower. Outdoor reset with our system lowers the system efficiency by maintaining temperature for long periods of time thereby increasing stack loss. Call us for more info, see us at NEFI or NAOSHM, attend one of our seminars. Ignorance is not bliss.

Joe Brix

Doesn't Outdoor reset

match the boiler water max temp to the change in heatloss which varies by the outdoor temp? How does firing the boiler to a lower target temp imply "maintaining temperature for long periods of time". You can still have outdoor reset with a cold start boiler, you're just not firing it to the high limit most of time.

Robert O'Connor_3

System 2000 question

Outdoor reset lowers the operating temperature of the boiler but as long as there is a temperature difference between the boiler and the outdoor air there's stack loss. The longer any temperature is maintained in the boiler the longer this stack loss goes on. If the outdoor reset control is properly adjusted this can be a long time. One other thing to consider is that operating at lower temps can mean shorter burner runs leading to increased possibility of chimney condensation and scale buildup in the boiler flues.