cycling, cold rooms

Subject:

Comments:
: : I worked 20 years installing @ maintaining gas forced air systems. : I moved to a different state (Missouri) to take a desk job and the house I bought has boiler. : I know zero about boiler maintenance but need to learn. : The home is about 1600sq ft built in 1970,buried copper pipes in a slab with manual zone valves. : All valves are located next to the boiler. : The boiler was replaced in 1980 with a Weil-Mclain model PCG4 105,000BTU. : It uses a Amtro Fill-Trol. I do not know the model number but is about 9 inches long and 8 : inches in diam. : The waterm heater was installed so close to the side of the boiler that the zone valves, fill-tron : and gauges and inaccessable. : I plan on replacing and moving the water within the next 2 weeks and at that time I would like : to service the boiler. : The boiler has a combination temp and pressure . : Temp reads 150 degrees pressure reads 0. : I can not take pressure at the back of the Fill-Tron as it can not be reached. : The burner cycles at 3 to 4 min interverals. : The room in the far end of the house (75 ft) away gets toasty warm in about 2 hours,but yet the : room 35 feet away takes 5 to 6 hours to become slightly warm.. : I can see the zone valves and they all appear to be in the fully open position. : I also noticed the air purger has water bubbles coming from the stem which I caped with a metal : cap. : Any thoughts on the cycling ,hot and cold rooms ,air purger and any other things I might check to : solve the problems would be greatly appreciated