gledhill Stainless Lite HP SOL Indirect 180-400 litres Design, Installation & Servicing Instructions page 16

INSTALLATION
d) It is preferable for the discharge to be visible at both the tundish and the fi nal point
of discharge but where this is not possible or practically diffi cult there should be
clear visibility at one or other of these locations. Examples of acceptable discharge
arrangements are:
1. Ideally below the fi xed 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 pipe serves a number of discharges, such as in blocks of fl ats,
the number served should be limited to not more than 6 systems so that any
installation can be traced reasonably easily. The single common discharge pipe
should be at least one pipe size larger than the largest individual discharge pipe
to be connected. If unvented hot water storage systems are installed where
discharges form safety devices may not be apparent i.e. in dwellings occupied by
blind, infi rm 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 fi tted on an Stainless Lite 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 Gledhill Building Products Limited are used. This includes the immersion heaters,
which must incorporate an energy cut-out. All parts are available to approved installers
from Gledhill Building Products Limited, Sycamore Estate, Squires Gate, Blackpool
(Telephone 01253 474402).
Combination Inlet Group
Combines elements 1, 2 and 3 below.
1. Pressure Reducing Valve - This must be fi xed near the cylinder. 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 Stainless Lite.
2. Non Return Valve - This is integral with the pressure reducing valve to prevent
backfl ow 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.
INSTALLATION
Secondary
Return Circuit
Heat Pump
Flow
Stop
Tap
Kitchen
Cold
Tap
Stainless Lite HP SOL model without
Secondary
Return Circuit
Heat Pump
Heat Pump
Return
Stop
Tap
Kitchen
Cold
Tap
Secondary
Return Circuit
Heat Pump
Flow
Stop
Tap
Kitchen
Cold
Tap
Stainless Lite HP & Slimline model
Page 16
Hot Outlet
P&T Relief Valve
Tundish
Pump Non Return
Valve
Expansion
To Drain
Vessel
Heat Pump
Return
solar heating system
Hot Outlet
P&T Relief Valve
Pump Non Return
Valve
Tundish
To Drain
Flow
Solar Flow
Solar Return
Stainless Lite HP SOL model with
solar heating system
Hot Outlet
P&T Relief Valve
Tundish
Pump Non Return
Valve
To Drain
Expansion
Vessel
Heat Pump
Return
without solar heating system
Balanced
Cold
Outlets
ERV
NRV
PRV
Combination
Valve
Mixed Hot
Water Out
Expansion
Vessel
Balanced
Cold
Outlets
ERV
NRV
PRV
Combination
Valve
Balanced
Cold
Outlets
ERV
NRV
PRV
Combination
Valve