29.11.2014 Views

sy24inst2 - The Initiative Group

sy24inst2 - The Initiative Group

sy24inst2 - The Initiative Group

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Rendamax<br />

<strong>The</strong> connection to the drain must be arranged such that there is an open connection under the<br />

condensate discharge point on the appliance (see fig. 8). In addition, the discharge pipe must be<br />

fitted with a trap (U-bend) in accordance with the applicable regulations.<br />

Ensure that the distance between the condensate discharge point of the boiler trap and the drainage<br />

pipe is at least 5 mm. This provides the required open connection and simplifies any subsequent<br />

maintenance activities and inspections.<br />

Fig. 8<br />

Condensate discharge<br />

5.4 Hydraulic system<br />

5.4.1 General<br />

Although it is not the intention to provide a complete handbook covering the most divergent<br />

hydraulic systems, the data is more extensive than would generally be provided in the case of<br />

conventional central heating boilers.<br />

<strong>The</strong> R300 unit is a low water content boiler for which the water flow rates must be within minimum<br />

and maximum values.<br />

Table 8 lists the required relationship between the three para-meters Q (water flow), P (pressure)<br />

and t (temperature) at maximum capacity. Because of the high flow rate, the appliance is less<br />

sensitive to water hardness. <strong>The</strong>refore, the water hardness may not exceed 250 ppm with a supply<br />

temperature of 80°C (see 5.4.5 Water quality).<br />

5.4.2 Water flow<br />

5.4.2.1 Flow rate and resistance<br />

<strong>The</strong> rate of water flow through the appliance must never fall below the required minimum<br />

(otherwise the water flow switch will be activated and the appliance will be shut down). <strong>The</strong> use<br />

of valves, non-return valves, systems in which several appliances are connected to a common<br />

transport system, etc., must not interfere with the required water circulation.<br />

Doc586/50CV22C 21

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!