Plumbing Installation - Rointe ROME RWI080DHWC4 Instruction Manual

The unit should be mounted close to an external wall so that the discharge pipe D2 (see Figure 2)
can be routed to a safe visible place. The tundish should be mounted in a visible location so that it
may easily be inspected.
3.6. Storage and handling
If the cylinder is not being installed immediately, it should remain in its original box with all pipe end
protective caps in situ to prevent damage. We recommend that the cylinder be transported to its
installation position with the outer box in place.

4. Plumbing installation

4.1. Connections
All pipework connections to the cylinder MUST be made in accordance with Figure 1 and Figure 2. A drain
cock (not supplied) should be fitted in the position shown in Figure 2 to facilitate draining of the cylinder.
4.2. Electrical fittings
The electrical fittings (Figure 2) must be fitted to the product. If not, the guarantee will be null and void.
Check the T/P Relief Valve (Figure 2) to ensure it is connected with the electrical fittings. If not, please
contact us by telephoning 0203 321 5929.
4.3. Cold water supply
For best results, the cylinder should be fed by an uninterrupted supply pipe into the pressure reducing
valve (PRV) (Figure 2) with a maximum supply pressure of 0.9 MPa. The cylinder should not be used
on any system with a supply pressure below 0.15 MPa and a flow rate of less than 20 litres per minute.
4.4. Temperature and pressure relief valve
The temperature and pressure relief valve (T/P Valve) is supplied (Figure 2). Once the T/P valve is fitted
it should not be removed from the cylinder or tampered with in any way. The valve is pre calibrated to
lift at 0.7 MPa or 90 C and any attempt to adjust it will render the guarantee null and void and could
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affect the safety performance of the unit.The outlet of the T/P valve should be routed in 15 mm copper
piping in a downward direction alongside the product to the tundish in a frost-free environment. The
outlet of the expansion relief valve must be T'd into this pipe before the tundish so that any water
exiting either valve can be seen draining through the tundish – see Figure 2 and Figure 3.
4.5. Pressure reducing valve
The pressure reducing valve (Figure 2) 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. This can be
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