gledhill PLATINUM D120, Instruction Manual

Page: 17 / 52

Page 17
Heating/primary Systems
The boiler and primary/heating systems should
be sized and installed in accordance with BS
EN 12828:2003, BS EN 12831:2003 & BS EN
14336:2004.
Safety
Platinum is fitted with a Combined Temperature/
Pressure Relief Valve to cope with any increase
in system temperature and pressure above the
design limitations, when used with boilers up
to 45kW output, which is the maximum allowed
by section G3 of the Building Regulations.
The primary water temperatures should be
controlled as outlined below.
Primary Circuit
It is essential that the circuit between the boiler
and the Platinum is pumped. The motorised
zone valve supplied should be fitted adjacent
to the unit and controlled by the cylinder
thermostat supplied. The thermostat and
motorised valve must be wired so that they both
switch off should an overheat situation develop.
When wiring the supplied components, it is
important to follow the wiring diagram in the
Wiring Section of these instructions.
Sealed Primary Circuit
Any boiler used must be fitted with an over
temperature cut-out. Unvented primary circuits
may be filled or replenished by means of a
temporary connection between the circuit and
a supply pipe provided a ‘Listed’ double check
valve or some other no less effective backflow
prevention device is permanently connected
at the inlet to the circuit and the temporary
connection is removed after use.
Alternatively, a CA device can be used, which
will allow the system to be permanently
connected to the cold mains supply. The
primary system can then be topped up, when
required, in the same way as an open vented
system fitted with an F&E Cistern.
Gate Valve
All our cylinders are tested to BS EN 12897 at 15
l/mim.
In extreme situations where excessive flow
rates, above 25 l/min are present, then a gate
valve on the return from the cylinder to the
boiler, before it joins the central heating return,
may be required to reduce excessive flow rates
and therefore any potential noise problems.
Schematic Open Vented Primary System
Boiler
Pump
150mm max.
Warming/Overflow
Pipe
F & E Cistern
Minimum
distance as
required by
boiler
manufacturers
instructions
Motorised Valve
(Not supplied)
Motorised Valve
(Energy cut-out)
Gate Valve
(Not supplied)
Schematic Sealed Primary System
Boiler
Motorised Valve
(Energy cut-out)
Expansion
Vessel
Gauge
Safety Valve
Pump
Motorised Valve
(Not supplied)
Gate Valve
(Not supplied)
INSTALLATION
INSTALLATION