3150 hydrostat

3150 hydrostat

PostBy: bubba On: Wed Jan 15, 2014 10:22 pm

can someone explain how high limit with differential and low limit with differential are set on efm 520 with hydrostat 3150
Last edited by bubba on Sat Apr 01, 2017 6:48 am, edited 2 times in total.
Reason: Moved to "Controls" heading.
bubba
 


Re: 3150 hydrostat

PostBy: Rob R. On: Thu Jan 16, 2014 6:17 am

EFM recommends the following:

Low limit: 160
Low differential: 10
High limit: 200

If you aren't using a tankless coil, you can drop the low limit to 140. Timer should be set for 2 minutes every half hour and hooked to the ZR terminal in the aquastat.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: 3150 hydrostat

PostBy: bubba On: Thu Jan 16, 2014 10:17 am

thanks ROB The high differential does not get used . Is that correct.
bubba
 

Re: 3150 hydrostat

PostBy: Rob R. On: Thu Jan 16, 2014 10:23 am

The high differential is fixed at 10 degrees.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy