Originally Posted by Phase Loss
ReplyA cheap manometer cost less than fifty dollars. If you work on any equipment which works on natural gas, propane, etc. than you must use some sort of gauge to measure both main gas pressure and manifold pressure. This is not a luxury item nor should it be on your wish list of tools. The bottom line is that if you are servicing this type of equipment, you MUST have some form of tool to measure pressure. If not pack up your tools and work only on equipment your are familiar with. Other peoples lives depend on it.
I remember around 15 years ago when there was this job at a church which had 6 gas package units on the roof with over 300 ft of gas pipe. Every thing was fine in a part load condition but when it got cold the heat would lock out to just a few units at a time and on any given day different units would lock out.
Well the previous tech changed some parts that were suspect but nothing worked. Weeks went by and finally and at first glance after looking at the 2" gas line which appeared undersized thought this could be the problem. It was determined that only on a full load there was not enough gas pressure to supply all the units at the same time. One or two would lock out at the rest ran just fine.
With a simple gauge it was determined that there was only 2" W.C. Only enough for first stage.
How about the furnace which was over firing and cracked the fire box and caused a flame roll out, and burned all the controls.
Or the wall furnace over fired and ruptured the fire box.... you get the idea.
