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High temp electric water heater thermostat

I had to replace my hot water heater. The new one has a thermostat that only goes to 150 degrees. This is unusable for me need at least 180 deg water. Any replacement thermostats for a duel element single phase low voltage water heater that go to at least 180deg 

Comments

  • GroundUp
    GroundUp Member Posts: 1,495
    Why on Earth do you need 180 degree domestic water?
    Charlie from wmass
  • Jamie Hall
    Jamie Hall Member Posts: 20,440
    edited January 2022
    There are no legal thermostats available for domestic (residential) hot water heaters which go over 150. If you need 180 degree water, you need either a commercial hot water heater or you need a boiler.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    Charlie from wmass
  • 426hemi
    426hemi Member Posts: 80
    Well thanks for the info, I don’t have 3 phase power let alone 277/480 so a commercial heater is not going to happen. The old heater went up to 190 deg? I’m going to contact the manufacturer the new water heater is rated for 200 deg? I can only imagine how **** pissed people must me who have bought these new heaters are! 150 deg water is lucky to be 140 at the fixtures! Should not be allowed to call it a hot water heater if piss warm water is all it’s good for. 
  • pecmsg
    pecmsg Member Posts: 3,546
    Are you using this water heater as a Boiler?
  • JUGHNE
    JUGHNE Member Posts: 10,291
    IIRC, electric WH tstats were available for dairy barns that might go up to 180 or near there.
    Not a standard stock item at normal supply houses.
    Usually could only get them from dairy equipment dealers.
    WMno57Robomoo
  • ratio
    ratio Member Posts: 3,332
    An aquastat (possibly with a contactor) can control those elements just as easy as the onboard stat. I'd use a modulating Honeywell T775 with an SSR, but that's not going to be the cheapest solution.

    AIUI, current mechanical codes require 120° at the point of use, with a hard fail if the temp exceeds that during an inspection. I'm sure the limited range is an attempt to keep Joe Homowner (& 6-Pack Handyman) from doing something dangerously illegal.

    Charlie from wmass
  • pecmsg
    pecmsg Member Posts: 3,546
    ASHRA recommends 140° minimum tank temp to kill legionnaires disease. Point of use 120° or less.
    Robomoo
  • Larry Weingarten
    Larry Weingarten Member Posts: 2,782
    Hi, There are ways to get hotter water, but I'm wondering if there is something wrong with the system that you don't get hot enough water. 140F will give you third degree burns in 5 seconds. Is there a cross connection in the lines, uninsulated pipe or pipe run underground? These things could cool the water down a lot.

    Yours, Larry
    Charlie from wmassDerheatmeister
  • Jamie Hall
    Jamie Hall Member Posts: 20,440
    The ideal -- and in some jurisdictions only legal -- for a residential hot water setup is to have the water heater set with a temperature of 140 F, and a thermostatic mixing valve on the output to control the fixture temperature to 120 F; this may mean, in the case of longer or uninsulated hot water piping a slightly higher temperature setting of the mixing valve. As @ratio notes, anything higher than that at the fixture is a condemable hot water system.

    Certain residential applications, notably dishwashers, may have hotter water during operation. This will be met with built in heaters in the application. Some washing machines will also do this.

    Commercial dishwashers have built in heaters for 160 F. As @JUGHNE noted, some dairy cleaning equipment also requires 160 F hot water; this may be provided by point of use boosters or by special hot water heaters. These applications are not approved for residential use.

    Yes, there are ways to bypass all this, at least in some cases. However, at some risk of sounding like a grinch, your personal liability if you do so, and someone gets injured by excessively hot water, is extreme -- both civil and criminal. And, if it is found that a bypass or other arrangement to provide water at the tap over the code limit (120 F) is or was arranged, that is automatic liability; no further investigation is required and you will have no legal defence (nor insurance).
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • WMno57
    WMno57 Member Posts: 663
    I've seen high temp dairy water heaters at farm stores. Might have been either Blain's Farm and Fleet, or Mill's Fleet Farm. They can special order parts if they don't have in stock. Most farms are single phase.
  • ChrisJ
    ChrisJ Member Posts: 13,883
    426hemi said:

    Well thanks for the info, I don’t have 3 phase power let alone 277/480 so a commercial heater is not going to happen. The old heater went up to 190 deg? I’m going to contact the manufacturer the new water heater is rated for 200 deg? I can only imagine how **** pissed people must me who have bought these new heaters are! 150 deg water is lucky to be 140 at the fixtures! Should not be allowed to call it a hot water heater if piss warm water is all it’s good for. 

    No one calls it a hot water heater. Right @Charlie from wmass ?
    And most feel 130-140 is very hot, you can't keep your parts in it for more than a few seconds.

    Is this for a commercial kitchen?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
    Charlie from wmass
  • WMno57
    WMno57 Member Posts: 663
    ChrisJ said:

    Is this for a commercial kitchen?

    Based on the OPs username I'm guessing he is cleaning and preparing Elephant. Mother Mopar, the chefs best friend!
  • 426hemi
    426hemi Member Posts: 80
    I got a thermostat ordered. It’s not a commercial kitchen. It’s a house and as far as liability if someone is so stupid they hold there hand in hot water until they get a third degree burn they belong in a padded room with a helmet. We don’t have any building codes here and I can’t imagine living under such a dictatorship. If I was in some town that had such insane things as inspections and codes I’d move immediately. I live in a rural area thank god.  
  • pecmsg
    pecmsg Member Posts: 3,546
    Why do you need 180* water?
    Derheatmeister
  • pecmsg
    pecmsg Member Posts: 3,546
    426hemi said:
    I got a thermostat ordered. It’s not a commercial kitchen. It’s a house and as far as liability if someone is so stupid they hold there hand in hot water until they get a third degree burn they belong in a padded room with a helmet. We don’t have any building codes here and I can’t imagine living under such a dictatorship. If I was in some town that had such insane things as inspections and codes I’d move immediately. I live in a rural area thank god.  
    It’s not a question of someone so “Stupid”, less then a second and your burned!
  • Jamie Hall
    Jamie Hall Member Posts: 20,440
    It's not a matter of codes and dictatorship, my good man. It's a matter of concern about other people. Good luck.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • JUGHNE
    JUGHNE Member Posts: 10,291
    So a relative visits with their toddler, that kid uses the sink or tub and ends up in ER.
    Questions are asked, social workers are on board....this is someone's fault.
    Then there are lawyers involved. Your homeowner's insurance is contacted, someone investigates the water temp and the insurance co. bows out, either immediately or next renewal cycle.

    Seems like an unlikely scenario......or not?
    Derheatmeister
  • GroundUp
    GroundUp Member Posts: 1,495
    Man, you sound like a treat to be around. 180 degree water will literally burn your skin off in 1 second. There is zero chance that you can wash your hands with even 140 degree water. So I'll ask one more time, WHY do you need 180 degree water in your house?
    Derheatmeister
  • Derheatmeister
    Derheatmeister Member Posts: 1,342
    GroundUp said:

    Man, you sound like a treat to be around. 180 degree water will literally burn your skin off in 1 second. There is zero chance that you can wash your hands with even 140 degree water. So I'll ask one more time, WHY do you need 180 degree water in your house?

    IMO what we have here is the "Don't tread on me" attitude...Haha...
    Who are you to tell me what to do?
    If he wants to burn himself that is fine...But potentially others...that just plainly sucks and if something happens hopefully our justice system will take care of it..
    GroundUp
  • hot_rod
    hot_rod Member Posts: 18,208
    I see HTP is promoting an electric tank with operating temperatures up to 170F. A mixing valve is standard equipment.
    A small footprint solution to the larger capacity tanks.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    Derheatmeister
  • Jamie Hall
    Jamie Hall Member Posts: 20,440
    No problem with that -- if the mixing valve is always installed.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    Derheatmeister