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1.1 Installation regulations
WARNING
Installation of the appliance must be done
by a qualified engineer in accordance with
prevailing and national regulations as listed
below.
Building Regulations G3
`
The Building Standards (Scotland)
`
The Building Regulations (Northern
`
Ireland)
I.E.E Electrical Regs
`
UK Water Regulations
`
1.2 Installation requirements
Water supply and Connections
In an unvented system the pressure and flowrate is
directly related to the incoming water supply.
Minimum supply requirements should be 0.08MPa
`
(0.8 bar) pressure and 20 litres per minute flow
rate.
A 22mm cold water supply is recommended
`
The PRV supplied; can be connected to a maximum
`
mains pressure of 1.6MPa (16 bar).
Following the PRV all fittings, pipework and
`
connections must have a rated pressure of at least
0.6 Mpa (6 bar) at 80°C.
2.1 General
Mounting the water heater
Wall fixings must support up to 130kg, see full
`
installation manual for weights table.
300mm service clearance required to left of unit.
`
The top bracket bolts should be screwed in until
`
they stop and stick out 8mm as shown Figure 2.
Secure the top bracket to the wall using appropriate
`
fixings - recommend 3 evenly spaced.
Secure the lower bracket to unit as per figure 3.
`
Locate top appliance bolts in the the wall bracket.
`
Secure the lower bracket to the wall, figure 3.
`
2.2 Electrical
Ensure the electrical supply is of sufficent current
`
rating and voltage - see product rating plate.
The flexible cable, supplied; must be wired into an
`
appropriate termination with dedicated isolation.
The wires are colour coded as follows:
`
Green and Yellow
Brown
Blue
2
1. Main Components & Pre-Installation
2. Installation - General
EARTH
( )
LIVE
(L)
NEUTRAL
(N)
1.3 Components
Item
Description
1
Temperature and Pressure Relief Valve
2
3
Wall Mounting Bracket (lower)
4
Neon Indicator
5
6
User Interface
1
4
5
2
6
The delivery includes:
Water heater
`
Wall mounting brackets
`
Literature pack
`
Cold water control pack
`
Expansion vessel (inc bracket)
`
Tundish
`
Pressure Reducing Valve (PRV)
`
Expansion (Pressure) Relief Valve
`
Check Valve
`
Compression nuts
`
8 ±1.5 mm
Figure 3: Lower Bracket
Inlet
Outlet
Table 1: Components
3
Figure 1: Components
Figure 2: Top Bracket
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