Boiler Mate

Boiler Mate

PostBy: Phil May On: Thu Aug 15, 2013 10:22 am

What is the best Boiler mate out there. Also is the "smart control" option worth the additional money. I am looking for a 41 gallon model or larger. Possibly 2 41gal in series. I want to be able to power wash with warm water. The 700 can haul the load no problem.
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700

Re: Boiler Mate

PostBy: Pacowy On: Thu Aug 15, 2013 2:03 pm

Phil May wrote:What is the best Boiler mate out there. Also is the "smart control" option worth the additional money. I am looking for a 41 gallon model or larger. Possibly 2 41gal in series. I want to be able to power wash with warm water. The 700 can haul the load no problem.


IMO the best "Boiler Mate" for a 700 is a 7 GPM coil. Cut out the middleman.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Boiler Mate

PostBy: Rob R. On: Thu Aug 15, 2013 8:41 pm

The "Boiler Mate" brand indirects are not what they used to be. Tons of problems with that smart control, and plenty of leakers also. Triangle Tube and Superstor make great units...I have a Bradford White unit that has been great, and there are others that perform very good.

With that said, a tankless coil would certainly be a simple and cost effective way to supply hot water to the pressure washer.

How hot does the water need to be? Any idea how many gallons per minute?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Boiler Mate

PostBy: lsayre On: Thu Aug 15, 2013 8:49 pm

I have considered a Burnham hydrastone-lined indirect water heater.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Boiler Mate

PostBy: SMITTY On: Thu Aug 15, 2013 10:51 pm

I've got a Boilermate 41 gallon - purchased at Home Depot and installed in '05. This year, that "smart" control took a dump. Luckily I found a post on the DIY forum listing step by step repair of the circuit board, saving me at least $170. Everyone that knows me knows my line of thinking on this - STEER CLEAR OF ELECTRONICS! Your wallet will thank you, both on initial purchase price, and on long term durability. No leaks that I've noticed ... but my Burnham oil boiler is leaking like a seive, so it would be hard to tell anyway ... that's a whole other post in and of itself!!

From what I hear, I was extremely lucky to go as long as I did on that control board - apparently they fail within 4-6 years like clockwork.

Here's my thread on the board repair: Fixing the dreaded Boilermate buzz: control board repair
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: Boiler Mate

PostBy: McGiever On: Fri Aug 16, 2013 12:26 am

BoilerMate smart controller problems were seen when used at 120 Volt control...at 24 Volt the problem didn't exist.

Since the original problem w/ these smart controller there has been a build revision to the controller and all is well. :)
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Boiler Mate

PostBy: Phil May On: Sun Aug 18, 2013 5:39 pm

I just want warm water to pressure wash with. I also have a shower and hand sink in the shop. I was going to mix the water to the pressure washer so the hot would last longer. Would a 7 gpm coil keep up when washing. Also how much are they.
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700

Re: Boiler Mate

PostBy: lsayre On: Sun Aug 18, 2013 5:47 pm

Phil May wrote:I just want warm water to pressure wash with. I also have a shower and hand sink in the shop. I was going to mix the water to the pressure washer so the hot would last longer. Would a 7 gpm coil keep up when washing. Also how much are they.


Unless your boiler is a monster I wouldn't think it could keep up while flowing at 7 gpm.

7gpm x 60 minutes/hr. = 420 gallons/hour
420 gal./hr x 8.333 lbs./gal = 3,500 lbs./hr.
3,500 lbs./hr. x 60 degrees of temp rise = 210,000 BTU's per hour required

Earlier today I ran my 3 GPM rated coil into my bathtub with the tubs hot water spigot wide open and it started out hot, but was cold (tepid at best) by the time the tub was about 3" deep, and the boiler fired up in a vain attempt to recover. Flow likely exceeded 3 GPM. I then took a shower in the same tub only a few minutes later and the water was hot the whole time. Flow must have been only 2 GPM or less.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Boiler Mate

PostBy: Pacowy On: Sun Aug 18, 2013 6:02 pm

lsayre wrote:Unless your boiler is a monster I wouldn't think it could keep up while flowing at 7 gpm.

7gpm x 60 minutes/hr. = 420 gallons/hour
420 gal./hr x 8.333 lbs./gal = 3,500 lbs./hr.
3,500 lbs./hr. x 60 degrees of temp rise = 210,000 BTU's per hour required


It is a monster. S-30 stoker rated at 30 lb buck/hr.

30 lb/hr x 12,250 btu/lb as received x 0.9 (allowance for unburned) x 0.75 (assumed efficiency) = 248,063 btu/hr picked up by the boiler water.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Boiler Mate

PostBy: lsayre On: Sun Aug 18, 2013 6:08 pm

In that case it should theoretically deliver 7 gpm of hot water endlessly (as long as you have coal) at up to 70 degrees of temperature rise. If water is entering the coil at 50 degrees and you maintain the exit at 120 degrees or less you should be fine. Above 120 degrees and/or above 7 gpm it will eventually go cold.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Boiler Mate

PostBy: Rob R. On: Sun Aug 18, 2013 7:58 pm

A 5 or 7 gpm coil would be fine, even though the stoker would probably be run at no more than 20 lbs per hour.

A pressure washer would be hard pressed to ever hit 5 gpm...and if it did, the load would be intermittent. The commercial "Hotsy" I used to have was 4.5 gpm and would blow the paint off a truck frame.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Boiler Mate

PostBy: Scottscoaled On: Sun Aug 18, 2013 8:26 pm

It's $250 or so to put in a coil. Plus a new gasket. If you are worried about capacity, go with an indirect and put a mixing valve on. If you are going to be doing very serious hot water pressure washing, a smaller indirect that is fed from a domestic coil might give you a better solution. Use the boiler to preheat the water going into the indirect. Would give you faster recovery and increased temperature with extended run times.
Scottscoaled
 
Stoker Coal Boiler: EFM 520x4, 350, 700. Van Wert 400 x 2, 800, 1200.
Coal Size/Type: Lots of buck

Re: Boiler Mate

PostBy: Phil May On: Tue Aug 20, 2013 7:42 am

My pressure washer uses 4.4 gpm. I am going to mix the water with cold to get around 100 degree water. 150 out of coil and 50 out of well ought to be a 50/50 mix for 100 and when you wash equipment there is a lot of time not washing while moving around and looking to see if you got it washed.
Phil May
 
Stoker Coal Boiler: EFM 700
Coal Size/Type: Buckwheat
Stove/Furnace Make: EFM
Stove/Furnace Model: 700

Re: Boiler Mate

PostBy: Pacowy On: Tue Aug 20, 2013 11:25 am

I'm not sure you'll get 150 degree water out of the coil, except for right when the flow of DHW starts. The computations above assumed no more than a 70 degree rise, which would put it around 120 deg.

At 120 deg, if the back of my envelope is working you'd need about 3.15 GPM of hot water and 1.25 GPM of cold water to get 4.4 GPM at 100 degrees.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: Boiler Mate

PostBy: Rob R. On: Tue Aug 20, 2013 12:23 pm

A 5 gpm coil, gasket, and a mixing valve should work fine. If the water temperature was critical (like a clean-in-place system for a milking parlor) it would be a different story, but for simply pressure washing you won't notice if the water dips to 90 degrees, for example.

I like to use 3/4" copper or pex to supply the coil and deliver the mixed water to the source. 1/2" copper will work fine around the coil and to "feed" each side of the mixing valve

Is your water hard?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy