Old Boiler Heated Better than New boiler

Dairon421

I installed a new boiler 21 days ago. The radiators was hot when I left after the install. It's a two family flat. The down stairs radiator are fine but the upstairs tenant complaints that the old boiler heated better and at night time the heat doesn't kick back on. Upstairs radiator is hot but you can keep your hand on it for a while before it gets to got. The thermostat (80 degrees thermostat location)is downstairs with radiator next to it. I have Hoffman air vents, so I just the small orfices near the thermostat on first floor and put the bigger sizes on the second floor. Idk if that will solve the problem or not. Have you guys ever had this problem where the old boiler heated better and why if the new boiler are more efficient 

SuperTech

Post some pictures of the boiler and the near boiler piping.  Model information for the boiler would help. How was sizing of the new boiler determined?

Dairon421

Dairon421

160,000 steam and we did edr  on radiator. The return was copper already 

MaxMercy

Dairon421 said:

Have you guys ever had this problem where the old boiler heated better and why if the new boiler are more efficient 

Same BTU output?

A more efficient boiler of the same size will output the same amount of heat but use less fuel doing it.

Unrelated, but I'd move the thermostat to the other side of the wall.

bburd

Did you change the thermostat? If so, is it compatible with steam heat? Many of the digital models either are not because the heating cycle is too short,
or have to be adjusted for steam or gravity hot water systems that need a longer cycle than forced air.

mattmia2

Where is the return? Is the return a drip before the main turns down and connects to the header?

Dairon421

mattmia2 said:

Where is the return? Is the return a drip before the main turns down and connects to the header?

Yes the returns are fine didn't get a picture but they are properly pitched 

EdTheHeaterMan

Did you get a new thermostat? Is it a digital display thermostat?

Steam boilers need the Cycle Per Hour (CPH) changed. You can change it in the setup menu. It should be no higher than 2 CPH but sometimes 1 CPH is better.

If it happens to be a bimetal coil type (rare but still available) the heat anticipator may be set incorrectly.

What thermostat is connected to the boiler? Picture please!

pedmec

First make sure main vents are working so the system has a better chance at balancing.You can be restricting the venting of the main with a bad main vent and the steam will find the shortest path which tends to end up being the first floor. Then i would consider moving thermostat. Was anything changed except the boiler?

Dairon421

EdTheHeaterMan said:

Did you get a new thermostat? Is it a digital display thermostat? Steam boilers need the Cycle Per Hour (CPH) changed. You can change it in the setup menu. It should be no higher than 2 CPH but sometimes 1 CPH is better. If it happens to be a bimetal coil type (rare but still available) the heat anticipator may be set incorrectly. What thermostat is connected to the boiler? Picture please!

This the type we use

EBEBRATT-Ed

Bouncing water level? Has it been skimmed? Tripping on pressure or LWCO may not be getting a long enough run time to heat the 2d floor

NYLamb

Start the boiler and stand by the upstairs radiator. Vent may not be venting @ startup leaving you with an air-bound radiator. 

Steamhead

@Dairon421 , I see you have the new system takeoff feeding into a much larger vertical pipe. I'd bet condensate is forming in that reducing coupling, choking the steam back. Wouldn't be the first time I've encountered that.

mattmia2

I don't seem to see a hartford loop. The water line may be lower so if there are water seals out in the system they may no longer be functioning.

HVACNUT

mattmia2 said:

I don't seem to see a hartford loop. The water line may be lower so if there are water seals out in the system they may no longer be functioning.

It's there. You can tell by the hammering.