Mira Elite QT Installation & User Manual page 10

The example below is based on the "Pipework Schematic Diagram" with 15 mm pipework,
A = 1.5 m, B = 0.75 m.
Size
15 mm Pipe
22 mm Pipe
15 mm Elbow
22 mm Elbow
Electrical
1. The electrical installation must comply with BS 7671 (commonly referred to as the IEE
Wiring Regulations) and all relevant building regulations, or any particular regulation
or practice specified by the local electricity supply company.
2. Ensure that all circuit protection devices, switches and cabling are adequate for the
rated current of the shower and that the rating of the electricity supply company fuse
and the consumer unit are adequate for the additional demand.
3. The shower must be earthed. Ensure that any supplementary bonding complies with
the relevant regulations.
4. The shower is intended to be permanently connected to the fixed electrical wiring of
the mains system. A separate supply must be provided from the consumer unit to the
shower.
5. The shower must be provided with means for local disconnection that is incorporated
into the fixed wiring in accordance with the relevant local wiring regulations. This must
be a double pole switch, which has at least 3 mm contact separation in each pole.
The switch can be a pull-cord type mounted to the ceiling within the shower room or
a rocker type switch mounted to the wall in the applicable zone area.
6. For new installations a 30 mA Residual Current Device (RCD) must be incorporated into
the electrical supply to the shower in accordance with the current wiring regulations.
When replacing an existing electric shower we recommend that a 30 mA RCD is
incorporated in accordance with current wiring regulations if not already provided.
1265606-W2-A
Quantity
(A) 1.5 + (B) 0.75
(A) + (B)
Number of Elbows
Number of Elbows
Minimum Effective Head
= 2.25 x 120
= x 20
1 x 55
x 15
(X) mm
10
Head Loss (mm)
270
55
80
405