Rointe SIENA, Инструкция по эксплуатации, Страница: 7 / 40

7
SIENA
Digital electronic water heater
NO. DESCRIPTION
1 Mains cold water supply
2
Stop Cock (not included)
3 Pressure reducing valve*
4 Check valve*
5
Expansion relief valve*
6 Discharge pipe (22 mm)
7 Drain Cock (not included)
8 Tundish*
9
Expansion vessel*
10 T/P relief valve (included)
11 Electrical fittings (included)
* Available in optional installation kit
4.5. Pressure reducing valve
The pressure reducing valve (Figure 2, page 7) should be installed in the cold water supply to the
water heating unit with the arrow pointing in the direction of water flow as shown in Figure 2 (page 7).
This can be connected to a maximum supply pressure of 0.9 MPa.
4.6. Expansion relief valve
This must be installed between the pressure reducing valve and the water heating unit in accordance
with Figure 2 (page 7). No other valve should be fitted between this valve and the cylinder. The
expansion relief valve contains a non return valve.
4.7. Expansion vessel
A suitable expansion vessel (Figure 2, page 7) with a pre-charge pressure of 0.15 or 0.3 MPa is
available in an optional kit for fitting to all water heating units in the range. The expansion vessel
MUST be fitted to the safety group. The expansion vessel MUST be positioned with the entry point at
the bottom – see Figure 2 above.
IMPORTANT: Regular checks must be carried out to ensure that the expansion vessel is correctly
pressurised to 0.15 or 0.3 MPa at all times. – see Figure 2 (page 7).