Question about Dayton G73 Utility Heater

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Dayton Model 4E459A Gas Unit Heater....200,000BTU

I just installed a used unit heater in my shop today. I had to convert it from NG to LP. I was tickled to see it worked fine, then finished the instalation with routing a new vent stack. Since installing the "stack", the heater intermittantly pops and cracks, reignition "flashes", etc.....Do you think the stack has restricted the air flow enough to be cutting out the vacuum switch? The hi-limit? What should I do? Any suggestions where to start? THANX!

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  • jdn58 Apr 10, 2008

    Helloooo?

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5 Suggested Answers

Buffalo12980
  • 625 Answers

SOURCE: dayton mod#3e219b gas heater

air compressor output should be 3.5 psi. to the fuel nozzle. the cowlings purpose is to channel the air-fan output through the rear vanes of the combustion chamber. if these openings are restricted then air can't get into the chamber. check to see that the fan blades aren't jammed against the cowling. if they won't spin then you won't get any air through the unit.

Posted on Dec 26, 2007

tbugger
  • 232 Answers

SOURCE: dayton unit heater

Dayton heaters are a product sold by Grainger. Contact them for a manual.

Posted on Aug 27, 2008

kingbrizzle
  • 407 Answers

SOURCE: my Dayton Gas Unit heater will not stay on. The

Have you tried the flue vent? If not, an easy way to check this would be to take the vent pipe off of the unit and see if it continues to have the problem. In most cases, this happens when you have blocked return air or dirty filters, flue blocked, or induction is blocked from switch or housing. One other possibility would be a dirty/clogged a coil which isn't allowing sufficient air to push out causing the limit to trip. I hope this helps somewhat.

Posted on Feb 07, 2010

  • 111 Answers

SOURCE: I am looking for a ng to lp conversion for a

granger

Posted on Dec 24, 2010

SOURCE: model #3e243b Dayton heater chg from LP to NG

Dayton is primarily sold by www.Grainger.com . You must purchase a re-jetting kit (Natural Gas Valve) from them to accomplish this.

Grainger Part # natural-gas-valve-1fek5_as01.jpg view_larger_button.gif Natural Gas Valve
Item # 1FEK5
Natural Gas Valve, For Use With 5VD61, 5VD63, 5VD65 DAYTON
1FEK5 4401 Usually ships
1-3 Days 1 $144.30 item_sale_symbol.gifSale Price$115.44 See All: Parts

Posted on Sep 23, 2011

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1 Answer

How to Convert to NG


You have to contact the manufacturers rep in the community to verify that the particular model of Dayton heater has the capability of NG to LP conversion. If it is, the natural gas kit will include a new set of brass 'spuds'...typically referred to as 'orifices'....for the main burners. The size of the hole will be considerably larger because NG contains less btu per cubic foot than LP gas.

There will be a replacement pilot orifice for the pilot assembly. Removed and installed usually a 1/2" and 7/16" wrench. This orifice will also have a larger diameter opening.

There should be a regulator to match the 100% redundant gas valve that is in your heater. Note though, that there may be several regulators in the kit to match any one of several brand gas valves that could've been installed on your heater....Robt Shaw, White Rodgers, Honeywell. They will NOT interchange with one another. Follow the directions closely to ensure installation is done correctly...you are working with a volitile, explosive gas !!!!

There may or may not be a set of air shutters to fit over the ends of the burners for primary air adjustment. Natural gas may require a bit of air adjustment to get the proper flame.

Thoroughly leak test everything when done, then leak test again.
If you feel you are in over your head, you probably are so contact a reliable service organization to do it instead. But at least you now have an idea of what is involved.

Aug 21, 2014 | Dayton (4LX45) Gas Heater

1 Answer

Model #3e243b Dayton heater chg from LP to NG


Dayton is primarily sold by www.Grainger.com . You must purchase a re-jetting kit (Natural Gas Valve) from them to accomplish this.

Grainger Part # natural-gas-valve-1fek5_as01.jpg view_larger_button.gif Natural Gas Valve
Item # 1FEK5
Natural Gas Valve, For Use With 5VD61, 5VD63, 5VD65 DAYTON
1FEK5 4401 Usually ships
1-3 Days 1 $144.30 item_sale_symbol.gifSale Price$115.44 See All: Parts

Sep 23, 2011 | Dayton (3E379) Heater

2 Answers

Rinnai 551FT Hi I have just got this model


On the data plate on the heater it will say NG for nat gas or LP for bottle gas

Jun 05, 2011 | Rinnai RHFE-1004FA 38,400 BTU Energy Saver...

1 Answer

Can this heater be converted from LP to NG ?


you need to change reg spring pilot injector and burner injector and reset pressure to heater , should be able to buy kit on line

Jan 29, 2011 | Dayton (4LX45) Gas Heater

1 Answer

Have a dayton hanging garage heater when trys to start acts like gas valve not opening heaters brand new.what should i look for


I have never seen a dayton gas heater but I will try. If this is an LP Gas
System are you using a 30lb. Cylinder, 100 lb cylinder or a whole house
Tank.

Next are you sure you got the right gas unit for the right gas system?
If using LP gas did you put an external pressure regulator before the unit?

Next is the a hot surface glow coil or a spark system ignition system?
If you have to hold the controller down and press a button similar to a outdoor gas grille is it sparking?

If it is sparking,did you bleed all of the air out? This could take several
tries on a new unit. Does this have a wall mounted thermostat that
controls the heater? Finally check to make sure that the gas valve
is switched on if it has that option.

Good Luck

Jan 14, 2010 | Heaters

1 Answer

Natural gas convertion to LP


you need too change the orfice about 10.00

Dec 22, 2009 | Dayton Heaters

1 Answer

My dayton NG heater fan will not shut off properly


Sounds like a bad fan switch. The switch is located on the heat exchanger and is 110 volt bi-metal switch. Follow the wires from the blower going back to the heatexchanger. Graingers can get you a new switch if you give them your model number. www.grainger.com.

Dec 12, 2009 | Dayton Heaters

1 Answer

Can the Dayton model 3e368e be converted to use


If you know a dealer or repair company,they can order orifices to change out in the unit.

Oct 17, 2009 | Dayton (3E386) Heater

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