The logs are all in a mess and I just moved here and i can't find anyone who can tell me how the logs are to go and I'm by myself and to old to figure it out does anyone have a diagram sure would appreciate it. any help would do. Thanks nana
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This will depend on whether the fireplace is vented or is vent-free. Vent-free gas fireplaces are sold as a kit with the valve, burner, media (logs, glass, shapes, etc) all designed for a particular placement to work together to reduce dangerous chemicals. A vent-free burner and valve cannot have the logs removed and replaced with some other type of ceramic gas log because the exact placement of the logs is designed around the ports in the burner where the flames rise to minimize carbon created from the flames touching the logs.
If your fireplace is vented then the pull of the flue will remove dangerous fumes created by the same placement so there are no rules about re-arranging or replacing "media". If the fireplace is vented then you could use other log-placement-guides to identify the type of log and where it belongs with little worry because vented logs are designed to be able to have some adjustment anyway.
If vent-free and without a manual, an educated technician should do this for you because the BTU setting on the valve must be compared to the types of burners, port placement, size of ports, amount of ports and flame height. After this examination, someone familiar with the various hidden "tongue-and-groove" etchings in different types of gas logs can figure-out where to place the logs. They may have to test the fireplace burning once or twice to get it exactly correct but once you understand the idea of how a vent-free gas log diminishes the carbon-output of the amount of gas flowing through the burners then it is only a matter of watching the flames to see where the logs could be and comparing the size and layout of the logs to find the best fit.
My name is mike. YOU DO NOT want to attempt to burn wood in a gas fireplace. The reason for it, is the venting is not designed for the fumes and high heat the wood produces. Only way you can safely burn wood, in a gas fireplace is have to make sure the piping and venting is set up correct to burn wood. Your problem is not most likely your stove or fireplace for the safety, it would be your venting. Thanks Mike
Unfortunately, you didn't list the model number of your fireplace and whether it's vented or vent-free. However, I suspect it's vented, as MARCO (now out of business) manufactured very few vent-free models. Restoration is going to depend on the condition of the burners, as well as the gas control valve and the condition of the firebox. The small ports you mentioned, are for the Rock Wool (Glowing Embers), which are divided into small pieces (dime size) and fluffed, then placed over the small ports. MARCO did not make a vented fireplace where silica sand was used on top of the burners. Normally, you only see that on vented gas log set, that is installed in a solid fuel burning (masonry) fireplace and operated with the damper fully open.
As far as restoration parts are concerned, I seriously doubt there are any available. MARCO, as such, has been out of business for almost 10 years. Today's burners are not designed for the same configuration that you have. It wouldn't be wise to try to change the configuration, as the firebox was tested and approved for only what's in there now.
Wish I had better news for you. But, my 15 years in the hearth and home business, tells me it would difficult and costly to do.
when the gas logs were installed the vent damper should have disabled. it sounds like this was done.it is unsafe to close the damper with gas piped into the fire place. sometimes a "u" block will be placed over the damper blade. if the gas has been removed and not piped into the firebox anymore it would be safe to remove this
Ok, I have a Marco Model 792775D. I am renting the house and there is no manual for it. How would I use it. Is it supposed to be fake logs or is it for real logs. The land lord said he didnt know if it works. I need a manual for it. PLEASE HELP!!!
I have a Model 792864B. Before you attempt to light the pilot light - make sure that any wall control switch or remote control for the fireplace is in the off position. Locate the gas supply line. There should be a gas supply valve to turn on the gas supply. The valve is usually painted a different color than the supply line like blue, green or yellow. Open the valve by pivoting the handle to be parallel to the gas line, usually counter-clockwise. When it is closed it is at a 90 degree angle from the supply line. Locate the pilot light assembly - this is the pilot light. There should also be a red or black ignitor button and a black or green valve control knob with the words "on" "off" and "pilot" on it. It may be located inside a black box, mine is marked heatolator, that has a lift off top. Lift off the top of the box. Push in the valve control knob and turn it until the word "pilot" is in line with the arrow (my arrow is red) or indicator line. While pressing and holding in the valve control knob - it presses in about 1/4", press the red or black ignitor button repeatedly (once per second) until the pilot ignites. Once the pilot is lit, continue to hold the valve knob in for about 30 seconds and then slowly release. The pilot should remain lit. If it remains lit, press in and turn the valve control knob to the "on" position. The on/off wall or remote control switch should now light your fireplace. If the pilot doesn't ignite, turn off gas supply valve, wait about 5 minutes and try it again.