I recently purchased a home that was built in 2003 and has an original, propane-fueled Burnham Revolution, Model RV5PSL-12 boiler. I am questioning its fuel consumption as it seems excessive to me and from what I have learned this system may have been installed incorrectly.
Here is some background:
The home is located in New Hampshire.
It has about 3000 sq. ft of heated living space.
There are 3 zones for heat and also an indirect domestic hot water tank.
The home is not occupied full time, for about 3 weeks a month it is unoccupied and the t-stats are set to 58 degrees during those times.
The home is well-insulated, 2x6 construction, and has high quality windows and doors.
Since October, on average, it is using about 100 cubic feet of propane in a 24 hour span of time. The propane is metered at the house as it is drawn from a community tank.
The system itself has a Burnham VS3000 mixing control and also has a Taco SR504 4 zone controller. Each zone has its own circulator pump.
It appears the aqua-stat is set to 210 degrees.
In doing some research I found the zone circulator pumps may be installed in the wrong location.
This installation has the circulator pumps connected to the return side of the boiler, which I believe is the left front pipe when looking from the front of the system. From what I have read they are supposed to be located on the supply side, the left rear pipe. Could the way they are presently installed interfere with the systems internal circulator and cause excessive fuel consumption?
I have attached a photo of the system.
Additionally, prior to purchasing the home the House Inspector made an observation that the radiators in all 3 zones took a long time to heat up. At that time he also noted that the heat loops had antifreeze in the pipes which had never been serviced. He thought that there was a possibility that the anti-freeze coagulated overtime and was causing a slow flow. He recommended that the system be purged and refilled with fresh water. Additionally all the flange gaskets in the system should be replaced as they were covered in blue residue due to the antifreeze. The former home-owner agreed to have the system serviced and the recommendations were completed prior to the purchase. I don’t know how familiar the service company that performed the work was with the Burnham Revolution systems. The original home-owner claims the system worked well without any issue but I do suspect he had excessive fuel consumption and just assumed this was normal.
So my questions are related to the proper location of the circulator pumps and any impact that this may have on the systems operation and effeciancy.
I also would like to find a highly recommend authorized service/installation dealer in the New Hampshire area that I could contact. I would really like a knowledgeable, Burnham trained service technician to look at this system and determine if there are any issues with it.
Any technical explanations and information that someone could share and/or provide any recommended service company contacts would be greatly appreciated.
Thanks so much.