U.S. Boiler Company K2WT-080B, Инструкция по установке, эксплуатации и обслуживанию

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Figure 9.10: Isolation of the Boiler from Oxygenated Water with a Plate Heat Exchanger
1 Boiler (Left Side View)
3 Isolation Valve
4 Swing Check Valve
5 Central Heating Secondary Circulator
(Inside Boiler Jacket)
7 Central Heating Primary Circulator
8 Plate Heat Exchanger
9 Air Separator
10 Automatic Air Vent
11 Expansion Tank
12 Automatic Fill Valve
13 Cold Water Line
14 Relief Valve
15 Relied Valve Discharge Piping
16 Drain Valve
17 Primary/Secondary Connection
From Oxygenated
System
12"
Do Not Exceed
1) System containing oxygen - Many hydronic systems contain enough dissolved oxygen to cause
severe corrosion damage to a boiler. Some examples include:
• Radiant systems that employ tubing without an oxygen barrier.
• Systems with routine additions of fresh water.
• Systems which are open to the atmosphere.
If the boiler is to be used in such a system, it must be separated from the oxygenated water being
heated with a heat exchanger as shown in Figure 9.10. Consult the heat exchanger manufacturer for
proper heat exchanger sizing as well as flow and temperature requirements. All components on the
oxygenated side of the heat exchanger, such as the pump and expansion tank, must be designed for
use in oxygenated water.
2) Piping with a Chiller - If the boiler is used in conjunction with a chiller, pipe the boiler and chiller in
parallel. Use isolation valves to prevent chilled water from entering the boiler.
3) Air Handles - Where the boiler is connected to air handlers through which refrigerated air passes,
use flow control valves in the boiler piping or other automatic means to prevent gravity circulation
during the cooling cycle.
IX. System Piping
(continued)
D. Piping for Special Situations