Drazice OKC 200 NTRR/SOL Operating And Installation Manual - Page 10
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2.2 EXAMPLES OF TANKS CONNECTION
2.2.1 CONNECTING A TANKT TO A SOLAR SYSTEM
Tank shall be connected to a solar system by a person familiarised with these heating
systems. Temperatures in a solar circuit may achieve far over 100°C, and there are higher
pressures than in typical heating systems, therefore correct selection of interconnecting
materials and its coupling is of great importance, as well as correct dimensioning of the
expansion tank connected to this system.
The tank is placed on the ground, next to the heating source, or in its vicinity. The heating circuit is connected
to marked inputs and outputs of the tank's heat exchanger; the deaeration valve designed for solar system
is mounted in the highest place. It is recommended to flush the heating circuit before the assembly. All wiring
connections must be properly insulated from heat.
Connecting a tank:
The manufacturer recommends that mixing valve is mounted on the hot water outlet, on
sunny days the temperature in the tank may reach up to 90°C which is a temperature
that, in case of scalding, may cause health complications. Output temperature suitable
for general use shall be set on the mixing valve.
Cold water shall be connected to an inlet marked with a blue ring and writing "HSW INLET". Hot water shall
be connected to an outlet marked with a red ring or writing "HSW INLET". 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 the tank, the HSW inlet has to be provided with a "T" plumbing 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.
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