Gondzik NL-BKDX100-400II/R, User Manual

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2.2 Calculation of water pipe resistance ： H max=P1+P2
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Water pressure drop inside the machine. Can be found on the machine ’ s nameplate.
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Water pressure drop in piping system. If the water flow velocity is 1.2m/s, the resistance of the
straight pipe is 0.6 Pa/m, and the resistance of each elbow is 2Pa.If the water flow velocity is 1.8m/s, the
resistance of the straight pipe is 1.25 Pa/m, and the resistance of each elbow is 4.5Pa.
2.3 Pump selection
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According to the rated flow of the machine and the calculated water pressure drop.To decide if you
need to install an additional circulating water pump.
2.4 Installation of floor heating
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The water flow speed in the fool heating pipe is not less than 0.25m/s, and the general design
is 0.25~0.5m/s.
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The distance between the pipes is 150~200mm;
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The length of each loop does not exceed 80m,and the general designed is about 40~70m.
The length difference between different loops does not exceed 10m.
3.Installing a DHW tank
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The heat pump may include (optionally) in its installation a tank for the production of domestic
hot water. The hydraulic installation of the tank must be made by qualified personnel, subject
to the applicable installation legislation and attached instructions of the tank.
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To combine an DHW tank with the heat pump, insert the DHW tank sensor supplied with it into the tank
sensor housing. In addition, a 3-way diverter valve (G1) must be installed between the external machine
and the DHW + heating/cooling installation, by means of what, the electronic controller diverts the water
from the heat pump to the DHW production or to the heating/cooling installation, depending on whether
there is demand for DHW.