IDEAL HP180IND, Installation & Servicing

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Page 14
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 HP 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.
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 HP.
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.
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 13 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;
Ideal HP SOL model without
solar heating system
Ideal HP SOL model with
solar heating system
P&T Relief Valve
Tundish
Hot Outlet
Mixed Hot
Water Out
To Drain
PRV
ERV
NRV
Stop
Tap
Kitchen
Cold
Tap
Combination
Valve
Balanced
Cold
Outlets
Expansion
Vessel
Heat Pump
Return
Solar Return
Solar Flow
Heat Pump
Flow
Ideal HP & Slimline model
P&T Relief Valve
Tundish
Hot Outlet
To Drain
PRV
ERV
NRV
Stop
Tap
Kitchen
Cold
Tap
Combination
Valve
Balanced
Cold
Outlets
Expansion
Vessel
Heat Pump
Return
Secondary
Return Circuit
Non Return
Valve
Pump
Secondary Return Circuit
Non Return
Valve
Pump
P&T Relief Valve
Tundish
Hot Outlet
To Drain
PRV
ERV
NRV
Stop
Tap
Kitchen
Cold
Tap
Combination
Valve
Balanced
Cold
Outlets
Expansion
Vessel
Heat Pump
Return
Heat Pump
Flow
Secondary Return Circuit
Non Return
Valve
Pump
Heat Pump
Flow
INSTALLATION
INSTALLATION