Technical data

Procon
. F  S
The Initial  lling of a sealed heating system, and subsequent re lling, must be by a method that has been
approved by the local authority and complies with building regulations.
In general Water Regulation Advisory Scheme (WRAS) recommendations will be acceptable in Ireland.
Domestic (In-House) Fluid Category  (C-)
Non Domestic (Other than In-House) Fluid Category  (C-)
For Category  systems, the approved method of  lling
must comprise of the following components in the arrange-
ment shown;
• Control Valve incorporating a Double Check Valve on
the Mains Cold Water pipework.
• Temporary Connecting Hose, which must be discon-
nected after use.
• Control Valve, on the heating system.
For Category  systems, the approved method of  lling
must comprise of the following components in the arrange-
ment shown;
• Control Valve.
• Strainer.
• Veri able Back ow Device with Reduced Pressure
Zone (RPZ Valve)
• Incorporating a ‘Type BA’ Air Gap.
• Tundish.
• Control Valve.
Further more, in accordance with BS :  system with an input greater than kW (nett), an automatic
water replenishment unit shall be installed to automatically replenish any lost or evaporated water.
Please refer to BS :  for allowable water replenishment methods for use with sealed/pressurized
heating systems.
Please contact RVR Limited for more information.
. E V
In accordance with BS : , BS : , WRAS Regulations, and Local Authority Water Regulations,
as applicable, the installer shall install a suitably sized, and approved, Expansion Vessel to ensure that the water
capacity of the system has ample expansion capacity.
The location of the expansion vessel shall only be isolatable from the system via a Lockable Type Service
Valved, which shall be locked in the OPEN position, to prevent accidental isolation.
Furthermore, a drain facility should be provided adjacent to the expansion vessel to aide the routine main-
tenance, overhaul, of the vessels Air Pressure setting.
The Procon  &  boilers only, are supplied with an internal -litre expansion vessel. This vessel is suitable
for a system with a maximum capacity of  litres. This is based upon a Cold Fill Pressure of .bar, and a Final
Working Pressure (HOT) of .bar.
For information on a comprehensive range of expansion vessels that comply with current British
Standards and WRAS Regulations, please contact RVR Boiler Sales.
Fig .a
Fig .b
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