starting a cold snow melt system

Weezbo

if you have a full flow by pass, opening it would be a good idea:)

if you run it up in 30 degree increments and turn off the burner for a few mins each time...things should come up slow and safe.

The by pass will allow the boiler to warm up the glycol to 58 ,then when you turn the boiler off the latent heat will increase the boiler temp ...to about ten degrees higher temp as it just sits there "being"..after it warms up the second time, you bring the heat up in the boiler another 30 degrees, turn it off again ... you dont want to have the "field: open or pumping during this part of pringing it back on line...


In many ways this would be likened to bringing a gen set back on line ,to run some signifigant Load. first you want the generators on idle ...and you want to bring them up slow and safe. one is lag and one lead..so , you want to bring the "Field" up in increments on one genny.....

turning on the circuit breakers to everywhere will dump everything time and time again...better to get one 1200 amp pannel rolling first..by heating only the lighting circuits in each branch distribution the genny wont even notice the load as you work safely in the light and sound:)

doug_14

I found a snow melt system down it had ran out of fuel . The boiler temp was around 24 degree f .I started the burner and felt the pipe as it began to circalate. my question is this is a cast iron boiler what happen when that 24 degree glco starts returning