burnam v75 coil

Unknown

Aftermarket coils have always been a delicate issue when it comes to performance. The bottom line with any immersion tankless heater is the available btuh capacity to make hot water. It will require 50,000 btuh to sustain 1 gpm of flow with a 100°F temperature rise. Yes, the 5 and 6 gpm coils will physically fit in the boiler, but the recovery will only be as good as the capacity of the boiler in btuh. This will end up always being about 4 gpm of coil capacity at 100°F rise for the V75 based on its 200,000 btuh firing capacity.

Just curious though; is this one a front (round) coil or a right rear (rectangular) coil. Did the original boiler possibly have a boiler bypass installed that may have been removed or modified when changing the block?



Glenn Stanton

Manager of Training

Burnham Hydronics

U.S. Boiler Co., Inc.

oil-2-4-6-gas

i have a burnham v75 that -the block was recently replaced(v7-yeah we all know why)after replacement the customer has complained about the hot water -- the mixing valve was replaced at that time . i have been there water pressure is good @65psi replaced the thermostat and checked the mixing valve ---anyway i see very low output when the water is running -so they want me to replace the coil---i was at 2 supply houses checking.. they list a 5 gallon and a 6 gallon -for the v7 series --but will the 6 gallon fit -1 supply house said yes 1 said no -- their labeling was a (pt-5 5gallon and pt-6 6gal.)Diversified Heat Transfer coils--- i would rather not pull out the old to find out the 6 gallon doesn't fit --

JOHN_103

if it was just a block replacment less coil , did anyone put boiler sealer in the leaking block? if so maybe you need to clean the coil

oil-2-4-6-gas

this is a round front mount coil 7-1/2" roughly .--this was a straight swap --piping wise --copper,, 90"s cut unsweated and replaced --or black pipe cut now nipples and union ---they didn't even add a shutoff for the supply side of the system --basically straight swap ---they were on a "budget" the labor allowance

Guy_6

Welcome Back

Glenn,
It is great to see you back. I hope that you are feeling well.

Guy

Unknown

Thanks Guy

But quite frankly I'm not supposed to be here. The Cardiologist wants me to rest and stay away from this stuff for about 10 more weeks. I have been popping on every once in a while but jumped into it today to defend some stupid comments made in another post. Quite frankly, I'm amazed that Dan tolerates those kind of unfounded comments. Other sites will not! They turn this place into a circus instead of what it is intended to be. Now I'm seeing why so many good industry people have left this site and won't come back. I'm going to take the doctors advice and stay away for quite a bit longer. I don't need the frustration. By the way, thanks for the get well wishes! Time to start another good book.

Glenn Stanton

Manager of Training

Burnham Hydronics

U.S. Boiler Co., Inc.