Max Pressure of Expansion and Compression Tanks (Cont) – Part 6

Norm Hall Monday Morning Minutes

[Continuation from last week’s MMM] Let’s assume we have a SIX story health care building and the heating system is 90 feet high with a 180 degree supply temperature. The pump and boilers are on the first floor. The BRYAN boilers selected come with 125 PSIG relief valves. Let’s also assume that the pump has a capacity of 800 GPM at 100 feet at design. [Read more…]

Maximum Pressure of Expansion and Compression Tanks – Part 5

Norm Hall Monday Morning Minutes

Maximum pressure in a hydronic system depends on a number of variables. Last week we used an example to introduce the maximum pressure at the expansion tank. Let’s look at a couple more examples. EXAMPLE TWO: Figure 1 shows a one line diagram of a heating system with a boiler and pumping system. [Read more…]

Cold Fill Pressure – Expansion and Compression Tanks – Part 4

Norm Hall Monday Morning Minutes

Cold fill pressure is defined as the initial pressure required to lift water from the point of the gauge readout to the top of the system plus 4 PSIG for positive venting. This statement holds true for systems from chilled water to heating systems up to 220°F. From 220°F to 250°F, consult the Bell and Gossett Air Management training manual, available from R L Deppmann Company, serving Michigan and Ohio, or from your local B&G representative for other parts of the globe. [Read more…]