Boiler Connections - Broseley THERMO VERONA DSA Installation And Operation Instructions Manual

17.0 MINIMUM PLUMBING REQUIREMENTS
This installation should be in accordance with BS 5449 code of practises. It must include a gravity circuit with an
expansion tank open to the atmosphere.
When installing this appliance on a gravity circuit, the system should consist of a tank/indirect cylinder fixed in
an upright position and should be connected to the boiler by 28mm pipe both flow and return. The pipes
should not exceed 7.8m in length. The shorter the run of pipe work the more effective the appliance is going to
be at heating the water. The cylinder and pipe work should be lagged to minimise the heat loss in the system. A
heat leak radiator must be incorporated into the system to dissipate any excess heat produced from the boiler
when connected demands are low. The heat leak must comprise a minimum of 10% of the boiler output. Fit
the heat leak radiator in the gravity circuit using 22mm pipe reducing 15mm for no more than 300mm before
the radiator.
18.0 BOILER CONNECTIONS
The Thermo Verona 16 is fitted with 2 connections for piping. These connections are 1 Inch BSP and are a
female thread.
19.0 CHECKS ON INITIAL FIRING
Before connecting up the boiler the installer must ensure that they thoroughly flush all of the systems pipes in
order to remove any residue which could compromise the correct operation of all system components (Pumps,
valves etc). It is also important to verify the chimney has sufficient draught, there are no blockages and that no
other appliance exhausts are inserted into the flue.
20.0 FILLING UP THE SYSTEM
ONCe all connections are complete the installer can proceed with the boiler connection. Open all the vent
pipes of the radiators, the boiler and the system. Gradually open the load valve, ensuring that the air vent pipes
are working correctly. Use the gauge to confirm the system is pressurised. With closed tank systems, a pressure
of 0.11 – 0.12 MPa (1.1 – 1.2 bar) must be reached.
21.0 CPS – CORROSION PREVENTION SYSTEM
The CPS is a three‐way valve (regulated by temperature) that improves the efficiency of the boiler, reduces
condensation and actively prolongs the longevity of the boiler. It does this by not allowing cold water from the
heating system to be directly introduced into the boiler until a desired temperature is reached, in this case
55°C. The CPS valve used is an ESBE VTC500 – we would recommend that this is installed if the system fitted is
an open vented fully pumped system.
B
CPS Valve (ESBE VTC500)
15
A
AB
Return
Flow
Pump