Page 11
d) It is preferable for the discharge to be visible at both the tundish and the final point
of discharge but where this is not possible or practically difficult there should be
clear visibility at one or other of these locations. Examples of acceptable discharge
arrangements are:
1. Ideally below the fixed grating and above the water seal in a trapped gulley.
2. Downward discharges at a low level; i.e. up to 100mm above external surfaces
such as car parks, hard standings, grassed areas etc are acceptable providing that
where children play or otherwise come into contact with discharges, a wire cage
or similar guard is positioned to prevent contact whilst maintaining visibility.
3. Discharges at a high level; e.g. into metal hopper and metal down pipe with the
end of the discharge pipe clearly visible (tundish visible or not) or onto a roof
capable of withstanding high temperature discharges of water and 3m from
any plastic guttering systems that would collect such discharges.
4. Where a single common discharge pipe serves more than one system, it should
be at least one pipe size larger than the largest individual discharge pipe (D2)
to be connected.
5. If unvented hot water storage systems are installed where discharges form
safety devices may not be apparent i.e. in dwellings occupied by blind, infirm
or disabled people, consideration should be given to the installation of an
electronically operated device to warn when discharge takes place.
Safety
The safety devices supplied or fitted on an Ideal Pro are selected for their suitability
for the temperatures and pressures involved. They must not be changed, removed or
by-passed and it is essential that only genuine replacement parts supplied or approved
by Ideal Boilers are used. All parts are available to approved installers from Ideal Boilers,.
Tundish
Hot Outlet
To Drain
PRV
NRV
Stop
Tap
Kitchen
Cold
Tap
Combination
Valve
Balanced
Cold
Outlets
P&T
Relief Valve
Immersion Heater
Expansion Vessel
Boiler
Return
Boiler
Flow
2 Port Valve
Secondary
Return Circuit
Schematic Diagram
Non Return
Valve
Pump
ERV
INSTALLATION
INSTALLATION
Line Strainer
This is integral within the combination inlet
group to reduce the likelihood of contaminants
fouling the valve seat. Following installation this
line strainer must be cleaned and replaced. This
needs to be carried out on a regular basis. as part
of the annual maintenance/service check.
Tundish
This is to allow the discharge from any Relief
Valve to be seen. It must be fitted away from
any electrical devices. See page 14 for discharge
pipework details.
Expansion Vessels Installation
To prevent water stagnation and particulate
accumulation affecting water quality, it is
recommended that the expansion vessel be
installed in the vertical orientation so that the
fitting accommodating thermal expansion or a
pressure surge is:-
1. bottom fed and upright; and
2. that the connecting pipework to the fitting:-
- rises continuously; and
- is kept to a minimum;
Combination Inlet Group
Combines elements 1, 2 and 3 below.
1.
Pressure Reducing Valve
- The cold water
supply to any mixer taps/showers must
be taken from the cold water tapping of
this valve to ensure balanced hot and cold
pressures. This valve is factory set to ensure
the correct operating pressure for the Ideal
Pro.
2.
Non Return Valve
- This is integral with the
pressure reducing valve to prevent backflow of
hot water towards cold water draw off points.
3.
Cold Water Expansion Relief Valve
- This safety
device is preset at the factory and will relieve
excess cold water pressure resulting from a
fault condition.
