Recent content by AlbertaSS

I did the same thing you are doing, with ribbed metal exterior on my shop. I used a thimble. Marked it out on the outside, drilled a few holes in the metal and used a good pair of snips to cut the hole out. I "peened" the outer piece of the thimble to fit around the ribs to push everything tight...

bob- I wonder if you put the thermostat in the coolest part of the garage and increase the adjustment between cycles on the thermostat if that would help.

Thanks guys, that makes sense with the exchanger being under negative pressure. I'm just going to run it with the man pressure at what they recommend and keep an eye in it. I did check the orifices they are all the same-074 is what is stamped on them. Thanks again

The saga continues- talked to someone again today who seemed knowledgeable at Mr. Heater. I had noticed the aluminum coating had broken down on the heat exchanger tubes where the tube bends are glowing red and would rub off with your finger. He told me not to worry about that. Really? He also...

txst: Thanks for the info, really appreciated. The heater is mounted in a cooler spot in the building beside the overhead door. It is mounted the recommended 18" from the wall. I was wondering about the orifices because shouldn't all the tubes be red, just not two of five currently? Will check...

Well I slowly moved the manifold pressure up tonight as I measured the tube temp. At 2"wc I saw around 450 to 475 degrees on the bends. At 3.6 " wc there were two tubes with a dull glow on the bends and the hottest I saw was around 800 degrees. Safe? I don't know. From what I researched the...

txst: Yes its getting frustrating for sure. I am going to bring home a laser heat sensing gun from work tonight and see what the temperature of the tubes are at on their exterior. Hopefully I can tweak the manifold pressure up. I will try call Mr. Heater again and ask for a technician. Not...

txst- Actually to get the last tube to stop glowing I had to reduce the manifold pressure down to 2.0"wc. Not sure what to think. I am a steam engineer and have been working with high pressure boilers for almost 20 years and can appreciate what overheating the tubes can do. The metal quality of...

txst- I took your advice and hooked up the manometer again to the heater. I adjusted the manifold pressure down to 2.4 from the recommended 3.6 inches H20 and got all but one of the tube bends to stop glowing red. I will play with it a little more this afternoon. Quite a difference from what...

dogdas, as I stated above I called Mr. Heater tech support about the tubes getting slightly red on the bends, was told this is normal if the manifold pressure is set properly for your altitude.

I just got off the phone with tech support at Mr. Heater. I was having the same problems with glowing tubes. Set the manifold pressure down to 3.6 " H20 from 4.0 on my 80K btu unit and was still having a slight red glow. Finally was able to talk to someone there this morning and was told this...

I just installed a Big Maxx 80000 btu unit. The manual states to slope the vent upward toward termination, so that's what I did. It seems every unit has different instructions for this. I would do what the instructions say for that particular unit.

CNG- yes the line pressure is at 5psi to the meter, gets split to the house/shop and knocked down at both. Did not realize pressure was that low in US. 3/4 plastic very common around here for residential, bigger for industrial shops, etc.

I just did the same thing from my house to the shop. The local gas company came and trenched it, and layed 3/4 plastic in the ground. 245 feet from the house to the shop. I did all the gas fitting, used 3/4 black pipe from the meter to the riser at house and from riser to the heater inside the...

Just finished my install and fired my Big Maxx 80 today as well. Bobs, I have the same feelings about leaving it unattended. LOL I had the same oil burn off but quit after 15 minutes. Going to be nice here again tomorrow, will open the big door and windows and run it again for a while. Still had...