15
Filling the heating system with heat-transfer agent
Your heating system is mounted. The boiler and automatic control equipment are
installed. The heating system is connected to the power network and to the grounding.
There is no mud and rust in the heating system.
In this case a process of filling a heating system with heat-transfer agent is
performed without preliminary washing. It is necessary to observe the following rules:
•
The heating system should be disconnected from the power network before
the filling a heating system with water or low-freezing liquid. It is necessary
to exclude unintentional connection to the power network.
•
It is necessary to check leak resistance of the heating system right after filling
a system with heat-transfer agent. Any leakages are inadmissible.
It is possible to fill a heating system with the “Galan-Potok” low-freezing liquid or
with water (Table 1).
Water as a heat-transfer agent has a number of indisputable advantages, such as
availability, cheapness, and ecological compatibility. Also water has good thermal
properties. Nevertheless, water has some disadvantages, such as heating system corrosion,
possible necessity for water specific electrical resistance correcting, annual boiler repair, etc.
Therefore we recommend you to use the “Galan-Potok” modern low-freezing liquid as a
heat-transfer agent for a heating system instead of water which also can be used for this
purpose.
“Galan-Potok” low-freezing liquid
A universal “Galan-Potok” low-freezing liquid the freezing temperature of which is
equal to -40
º
C is designed with the aim of improving the reliability and economic efficiency
of a heating system operation. Low-freezing liquid has special additives against formation of
scum and scale on the walls of the heating system. Also the “Galan-Potok” low-freezing
liquid includes the additives used for inhibition of corrosion and for scale dissolving. The
application of low-freezing liquid saves from danger of “unfreezing” the heating system in
the event of sudden power supply disconnection. Also the usage of low-freezing liquid
significantly simplifies a heating system servicing because the parameters and properties of
low-freezing liquid completely meet the requirements of the heating system with electrode
boiler. The application of low-freezing liquid significantly improves the economic and
performance indicators of the heating system. In particular, the usage of low-freezing liquid
simplifies the execution of starting-up and adjustment, reduces the time intervals for
performing these tasks, provides the stable operation of the heating system, and reduces
the expenses for the heating system servicing.
Filling a heating system with low-freezing liquid
There is no mud and rust in the heating system. The heating system is filled with a
measured volume of low-freezing liquid through a drain valve by means of the pump (for
example, by means of the “Malysh” pump). After performing of exhaustion of an air from
the heating system, the filling of 1/3 of surge tank volume is accepted as normal.
Water as a heat-transfer agent
It is necessary to reduce or to increase the water specific electrical resistance
(hereinafter referred to as “correcting procedure”) for providing the electric boiler operation
with nameplate rating. Correcting (adjustment) of the water specific electrical resistance is
performed after filling a heating system with water by adding sodium salt solution or water
with high electrical resistance to water. In this way table values of the starting current
strength and maximum current strength (Table 2) at specified return pipe temperatures are
reached.
It is necessary to pay scrupulous attention to the instructions of the given Operation
manual:
•
The temperature on the inlet of the boiler (“Inlet” sensor) should lie in the
range +15 ÷ +20
º
C.
•
The boiler switching on durability should not exceed 30 seconds.
