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Setting pressure on a 75000 master heater k-1

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Can I run a 75000 btu garage heater with 1/2" gas pipe? The run is ruffly 50ft


Call your local utility for this info, as this also depends on the gas line pressure not just the line diameter.

Dec 15, 2016 | Heating & Cooling

1 Answer

I have a mr heater 75000 with a 4 flash blink code. the heater is brand new, only worked for 3 days. i have bypassed the 2 switches but still cant clear the 4 flash blink code.


According to the Owners/Installation Manual, the 4 flash blink code indicates that the High Limit or Roll Out Switch is open. This may be caused by a venting problem or high altitude operation. make sure you have the proper pressure to the heater's regulator. For Natural Gas it must be a continuous 7 water column inches.

For further information, I have included a link to your Owners Manual that you can download and print, for future reference. http://www.mrheater.com/upload/newsletter/MHU_HSU_CUH_60016_BL.pdf

Hope this helped to solve your problem.

Mar 22, 2011 | Mr. Heater Natural Gas Garage Heater -...

1 Answer

Running very rich. how to adjust fuel and air screw


First of all are you running kerosene or diesel ? If you are using diesel, it does not burn as clean as kerosene which causes that burning rich smell. If you are going to use diesel, just use #1 diesel only but still may have a little rich smell. Don't use die red off road diesel. If you are using kerosene and want to check your air pressure on your pump, you will need a 10 lb. test gauge with a 1/8" NPT male pipe thread on the end of the gauge.There are 2 plugs on the back plate. Do not remove the upper plug with the hole in it. This is the adjustment screw for pressure. Clockwise increases pressure, counter clockwise decreases pressure. With the heater unplugged,remove the lower plug. Screw the test gauge in and start the heater. Check the pressure. Most are set between 5 1/2 and 6 lb. of pressure. Check your owners manual to see what your setting should be. If your pressure does not change, you have a worn pump and it would have to be repaired. Once you have the correct setting, unplug the heater, remove the gauge and install the plug back. If you feel that you are not qualified to perform this procedure, send it in to a local repair center.

Jan 11, 2011 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

I have master torpedo multi fuel when its cold it work fine but when kick on after its hot it wont it just blows smoke out and have to unplug it


fuel pressure could too high you could have a cracked rubber hose on the pump sucking air start with fuel pressure and that will help us to get started

Dec 13, 2010 | Milwaukee Tool Master Heater 165,000 BTU...

2 Answers

I just purchased a Master Temp 400 for my pool. The installer is telling me that the normal gas line pressure going into my home is 4 ounces of pressure. I also have a gas 17KW generator and a gas...


The owner's manual and installation manual details exactly how this is suposse to be install. You shoul have a pressure going to the heater of 14 WC (Water Column - more on that elsewhere). if you have already installed a high pressure regulator, then all you need is to send a line from that high pressure line closer to whwre your heater is installed, at that point you will install a low presurre regulator and should be able to adjust the pressure required by your heater. That is what they call a two stage gas regulators installation

Dec 05, 2010 | Pentair MASTER TEMP HEATER 400 000 BTU NG...

2 Answers

As soon as i hook up the thermostate it flashes the 3 flashes code and i have already tryed a new thermostate .... as soon as i unhook the thermostate it flashes for normal operation with no call for heat...


Try using it without the thermostat, tie the two thermostat wires together or put a jumper between
r and w. If furnace operates, you must have wrong style of thermostat

Jan 28, 2010 | Mr. Heater Natural Gas Garage Heater -...

1 Answer

Turns on will not pump fuel photo cell works need to know how fuel gets to nozzle 75000 btu reddy heater


the fan motor has on its rear an air pump. pressure from this is fed to the fuel nozzle. the nozzle is constructed like a venturi tube. as air rushes past the venturi it creartes a suction for the fuel and expels it through the mozzle. the spark or hot surface igniter ignites the fuel. the large fan pushes the heated air and flame out the end.

Oct 17, 2009 | Reddy Heating & Cooling

1 Answer

Can i convert my dyna glo 75000 btu propane


I'm sure you can, contact the manufacturer and ask if they have a natural gas jet or orfice for your model heater, these are usually very easy to replace.

Feb 28, 2009 | Heating & Cooling

1 Answer

Heater surging


We are a service center for these type of heaters. The most common problem causing surging is the air pump and or the rubber hoses. If the pressure gauge holds steady then it is most likely one or both of the hoses. New from the box we get heaters with the hoses bent and sometimes even rotten. In an emergency you can turn the carbon vanes 180 degrees and put the pump back in service.

Nov 16, 2008 | All-Pro Kerosene Garage Shop Heaters - All...

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