ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
fuse rejectors
by HotLine1. 03/24/17 07:53 AM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
WEG CFW-11 Frequency Inverter
by jraef. 03/21/17 08:50 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,315 Are you busy
166,048 Re: Forum
160,525 Need opinion
Who's Online Now
1 registered members (electure), 60 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#21112 - 01/27/03 07:43 PM Water Heater or Boiler????  
golf junkie  Offline
Member
Joined: Apr 2001
Posts: 507
York, NE
When does a water heater become a boiler??

We are working on a 70,000 sq.ft. nursing home. There are two high temp, high capacity, gas fired "water heaters" that supply hot water for a commercial kitchen. I'm not sure yet if the domestic hot water is tempered off this supply or it may be completely separate.

The plumber had a boiler inspector on site last week and the inspector said that remote shutdowns will have to be provided for these "water heaters".....he called them boilers.

I have had to provide remote shutdowns for large boilers that provide building heat, but haven't had to do it for these smaller units. And of course in isn't engineered into this project so there were no rough-in's provided for the shutdowns.

When does a water heater become a boiler?? What is the difference?

thanks,
GJ


Work Gear for Electricians and the Trades

#21113 - 01/27/03 08:55 PM Re: Water Heater or Boiler????  
gramps  Offline
Member
Joined: Aug 2002
Posts: 112
ohio
i'm not a plumber, but i seem to remember from years ago, aboard an oceanagraphic research vessel, (i was a ship's electrician, in another life), this difference was defined as "when the hot water heater becomes a "pressure vessel" with a test pressure certification as such, then its no longer a "heater", but is a "boiler". also, if memory serves me, it must be capable of maintaining a certain "saturation" temperature at a given "working" pressure.

hope this helps...my memory isnt as good as it was 30 years ago... [Linked Image]


#21114 - 01/28/03 08:41 PM Re: Water Heater or Boiler????  
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
Such items are defined, and generally regulated, by the American Society of Mechanical Engineers' "Boiler & Pressure Vessel Code." I suppose that, technically, ALL water heaters would be considered "low pressure boilers."


#21115 - 01/28/03 10:55 PM Re: Water Heater or Boiler????  
golf junkie  Offline
Member
Joined: Apr 2001
Posts: 507
York, NE
I was told by the GC today that anything larger than 200,000 BTU capacity is considered a boiler by building code.

He also said that after this limit was put into code many manufacturers went back and changed the nameplate ratings on their equipment to 199,000 BTU to avoid this requirement.

GJ

[This message has been edited by golf junkie (edited 01-28-2003).]



Member Spotlight
watersparkfalls
watersparkfalls
Washington...Not DC
Posts: 216
Joined: March 2005
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.019s Queries: 14 (0.003s) Memory: 0.7581 MB (Peak: 0.8893 MB) Zlib enabled. Server Time: 2017-03-24 13:55:30 UTC