Are Mr Heaters Heat out put adjustable?

[Leeboy20]

Im just curious on a question about my Mr Heater 75,000 Natural Gas Heater. I had everything professionally installed except the hanging, venting and wiring we did. It was all tested by the heating guy and passed. It works really good, but im just wondering if there is adjustments on them to make the heat come out hotter , which could make quicker cycling time? Or , just leave it alone? How does one do a test to make sure its up and running at its max and best setting?

 

[rwreuter]

according to the manual, there is an adjustable thermostat.

 

[Leeboy20]

What would be the pros and cons of adjusting it?

 

[dave67fd]

according to the manual, there is an adjustable thermostat.

Can you refrence which page this is on?
There is no internal thermostat on the Mr. Heater heaters. Your gas installer should have checked gas flow and manifold pressures.

You stated it works really good. Leave it alone. It's most likely working at it's max efficency. If you want/need more heat get a bigger one.

 

[ForceFed70]

The BTU output is not adjustable. Sorry.

Some unit heaters have an multi-speed fan but I'm pretty sure the Mr. Heater ones don't have this feature.

 

[Briguy_123]

The firing rate is fixed. unit cycles on and off with T-stat.

That being said

Check the gas pressures. (You will need to make a U-tube manometer)

Inlet pressure must be at least 5"wc (RUNNING)

The manifold gas pressure. (Output of the Gas valve) Should be about 3.6 to 4.0" wc depending on your elevation.

See page 13 of your owners manual.

Again these pressures are operating pressures. If you are lower than 4.0" wc your input will be less than 75K BTU. Thus not putting out as much heat.

I had to adjust mine when I converted from LP to Nat Gas.

 

[Leeboy20]

Reason i brought it up was because a past thread, a person asked how to check that it was running at full steam. Im sure mine is fine, but just curious, thats all.

 

[rwreuter]

Can you refrence which page this is on?
There is no internal thermostat on the Mr. Heater heaters. Your gas installer should have checked gas flow and manifold pressures.

You stated it works really good. Leave it alone. It's most likely working at it's max efficency. If you want/need more heat get a bigger one.

i guess i misunderstood the question.....there is a thermostat on the heater...that is adjustable to me......similar to the furnace in your (my) home....heats up the area and then shuts off when it reaches the adjusted temp.

now i am not a hvac guy and don't take this as i am pointing fingers or being snobish, but isn't that is why you size the heating unit for the room or building....so that is cycles at appropriate intervals.

 

[dave67fd]

rw,
There is a thermostat "for" the heater. Not "on" the heater (or internally) as you stated. Big difference. There is however a thermocouple on the heater used for safety shutdown/monitoring. This does not though, control the heat cycling of the unit. The remote thermostat on your wall monitors the room temp and turns the heater on/off as needed.

The heater should be sized properly for the room or building. BTU's per Square footage, insulation qualities etc.. all factor in. The heater cycles at the proper intervals based mainly on the remote thermostats operation, quality, location and setting.

I didn't intend to sound abrasive in my comment, hope you didn't take it that way.

Dave