b.
Plumbing
The heater must be connected to the mains cold water supply. This must have a minimum running pressure of 69kPa
(0.7 bar, 10 psi) and a maximum pressure of 690kPa (7.0 bar, 100 psi).
Before connecting the pipe work to the shower, ensure that pipe work is flushed out.
1.
It is recommended that a WRAS (Water Regulations Advisory Scheme) listed isolating valve is fitted between the
rising main and the unit. This will allow the unit to be serviced without turning off the cold water or exchanged without
having to turn off the water at the water stop valve.
2.
The heater can be fed from a header tank provided this has a minimum head of 7 metres (23ft).
3.
Ø15mm copper or stainless steel pipe should be used.
To avoid cross threading, DO NOT REMOVE the brass nut from the elbow when positioning the pipe.
If top entry is required, turn the elbow 180° into the required position.
If rear entry is required, treat as top entry with an additional “Yorkshire” elbow (soldered type) for fitting into the rear
channel.
In multiple installations, correct pipe work sizes should be calculated to maintain adequate flow to each shower.
4.
It is in order to use a WRAS (Water Regulations Advisory Scheme) approved sealant sparingly whilst avoiding
excess finding its way into the shower operating parts.
5.
With stop valve connected,
flush the pipe work through to remove any particles etc
, before making the final
connection to the shower. Blockage in the water ways (particularly the handset and solenoid valve) will prevent the
heater working properly.
6.
The shower is designed to have an open outlet and should only be used with “Heatstore” recommended fittings.
Do not connect the handset until after the shower front cover and corner section are fitted.
WARNING: DO NOT FIT A TAP ON THE SHOWER OUTLET.
TAKE CARE TO AVOID RESTRICTING THE OUTLET OF THE PRESSURE RELIEF DEVICE
c) Electrical
The electrical installation must be in accordance with the current BS.7671 (IEE Wiring Regulations) and “Part P” of the
Building Regulations and/or local regulations
1.
The shower is designed for a single phase AC electrical supply.
Please check the rating plate on the unit to see what details apply to your unit.
AS A GUIDE ONLY (* Only applies if external earth impedance is less than 0.35 Ohms)
Rating
Cable Sizes
Fuse / MCB
Cable Length
6.0mm²
10.0mm²
40A Type B MCB
27m Max.
45m Max.
8.5 / 7.8kW 240 / 230V
6.0mm²
10.0mm²
45A BS.1361 fuse
12m Max.
*
21m Max.
*
6.0mm²
10.0mm²
40A Type B MCB
27m Max.
45m Max.
9.5 / 8.7kW 240 / 230V
6.0mm²
10.0mm²
45A BS 1361 fuse
12m Max.
*
21m Max.
*
Remember to upgrade the cable if it runs in thermal insulation in a loft, or for a longer distance.