Sediment gradually accumulates in any water based system reducing the system’s efficiency and damaging internal parts . Draining the boiler very season reduces the accumulation of sediment . Be aware that draining the system can take a long time, and the water often has a unpleasant odor. This does not indicate a problem . Drain the system during warm weather , and open the windows and run a fan to reduce andy odor.
Start by shutting of the boiler and allowing the hot system to cool. Attach a garden hose to the drain at the bottom of the the boiler, and place the valve on the highest radiator in the house .
When water stops draining , open a billed valve on a radiator closer to the boiler . When the flow stops , locate the valve or gauge on top of the boiler, and remove it with a wrench.
Maseru the stymie is cool before you add water. Close the drain valve on the boiler. Insert a funnel into the gauge fitting and rust inhibitor , available from heating supply dealers. Check the container for special instructions. Reinstall the valve or gauge in the top of the boiler , close all radiator bleed valves, and slowly reopen the water supply to the boiler .
When the water pressure gauge reads 5 psi, bleed the air from the radiators on the first floor, then do the same on the upper floors . Let the boiler reach 20 psi before you can turn the power on. Allow 12 hours for water to circulate fully, then bleed the radiators again.
Use a a garden hose to drain water from the boiler . Keep the drain end of the hose lower than the drain cock on the boiler .
If the valve or gauge on top of the boiler is attached to a separate fitting hold the fitting still with one wrench while removing the valve or gauge with another .
Using a funnel , add recommended rust inhibitor to the boiler through the valve or gauge fitting.
The boiler should reach a pressure of 20 psi berg you turn the power back on.
Replace Radiators Control Valves
A radiator control valve that won’t operate should be replaced . To replace the valve, you’ll first need to drain the system . Then use a pipe wrench to disconnect the nut on the outlet side of the valve , then disconnect the calve body from the supply pipe . Thread the tailpeace of the new calve into the radiator. Thread the valve body onto the supply pipe . Make sure the arrow on the valve body points in the direction of the water flow. Thread the connecting nut on the tailpiece onto the outlet side of the valve . When you recharge the system, open the bleed valve on the radiator until a trickle of the water runs out.