-
10
-
b)
Service water heating via thermal energy through heat exchanger
Closing valves of the heat exchanger must be opened which ensures heating water flow from the hot water
heating system.
Together with the closing valve, it is recommended to install an air outlet valve at the inlet
to the heat exchanger in order to bleed the heat exchanger as needed, in particular before the beginning of
the heating season (Figure 4).
The time it takes to heat up using the heat exchanger depends on the
temperature
and flow of water in the hot water heating system.
A combined heater is made in universal
design
–
depending on the need of connecting the closing valves to the heating element either from the
right, or from the left.
It is recommended that heating water inlet and outlet are provided with shutoff valves ( in
case the tank has to be demounted).
The valves have to be as close to the heater as possible
to avoid higher thermal losses.
2.6
EXAMPLES OF TANKS CO
NNECTION
Connecting a tank to heating system
The tank is placed on the floor next to the heating source or in its proximity.
The heating circuit shall be
connected to marked tank exchanger inputs and outputs, and bleeder valve installed at the highest point.
It
is necessary to install a filter into the circuit in order to protect pumps, three
-
way valve, backflow flaps and
the exchanger from sedimentation.
It is recommended to flush the heating circuit before the assembly.
All
wiring connections must be properly insulated from heat.
If the system works with priority heating of HSW using a three
-
way valve, always follow the installation
instructions of the three
-
way valve’s manufacturer.
Connecting a tank to HSW system
Cold water shall be connected to an inlet marked with a blue ring and writing “HSW INLET”.
Hot water is
connected to outlet marked with red circle or inscription "HSW OUTLET".
If the hot sanitary water (HSW)
distribution is equipped with circulation circuit, it shall be connected to the outlet marked with
“CIRCULATION”.
For potential drain of heater, the HSW inlet has to be provided with a “T” fixture with a
drain valve.
Each individually lockable tank must be on the cold water inlet provided with a stop gate, test
tap, safety valve with a reverse flap and a pressure gauge.
