13
6.4. Boiler Piping and Valve Connection
6.4.1. A boiler must be connected the heating water replenishment and smoke exhaust system in
such a way as to ensure its longevity and safe operation.
The key factors ensuring the longevity of the boiler are the following:
- the use of softened water, as stated in clause 2.2 of Section 2 of the Instructions;
- a temperature of the return water to the boiler, not lower than specified in Section 3 of the
Instructions.
Technical measures for safe operation of the boiler are provided in Section 8.
6.4.2. Valve and pipe connection is required to use only high-quality and proven sealing and
connection devices and components, capable of reliably maintaining the system pressure.
6.4.3. In the heating or hot water treatment system on the boiler piping, it is required to provide
and install vent assemblies located in areas of potential air accumulation and jams that block
water circulation. We recommend a vent assembly diagram shown in Picture 6.4.1.
Picture 6.4.1 Vent Assembly Diagram
1 - automatic air vent device; 2 - valve, tap
Automatic air vent is used to remove air accumulating during the operation. A valve or tap is used
to remove air pockets by filling a pipeline with water.
6.4.4. Pictures 6.4.3 and 6.4.2 present two possible boiler connection diagrams. For a variety of
needs, the engineering process may involve other boiler connection diagrams. In any case, the
following conditions must be satisfied:
-
sound system replenishment with softened water;
-
redundancy of pressure safety devices;
-
compensation of changes in volume and service of compensatory device without draining
the system;
-
safe draining and dewatering of the boiler;
-
sound preservation of boiler certificate’s parameter values during operation: water
temperature (feed and return), water pressure in the boiler.
6.5. System Filling and Leakage Check.
Main pipe (air outlet)
Air escape pipe
