Technical data

19
STRATA2
5.5 Water Connections
The central heating flow and return connections are 1
1
/
4
" BSP male. Two sets of flow and return
connections are provided and located on the rear top of the appliance and the rear of the appliance. The
installer may use both top or both rear connections or one of each for connection of the flow and
return pipes.
A suitable safety valve must be installed onto the boiler flow pipe between the boiler and any
isolation valve. The boiler flow and return pipes must include a method of disconnection and must include
isolation valves.
5.6 condense waste connections
The condense waste connection is located at the lower rear of the appliance. The condense syphon
cleaning point is factory fitted with a heavy grade black plastic cap which MUST NOT BE REMOVED.
Operating the appliance with the cap removed from the syphon cleaning point will allow products of
combustion to be discharged from the cleaning point.
The condense waste connection is a
3
/
4
" BSP male threaded stub fabricated from plastic. The installer
must connect to this stub, a condense waste pipe fabricated from plastic tube and fittings (
3
/
4
", 22mm
overflow pipe is considered suitable). Only plastic components must be used for the condensation
discharge. Metal pipes are not acceptable due to the acidic nature of the condensate.
The built in syphon allows the unit to be connected directly to a drain system. If any part of the
condense waste pipe is to be run external to the building or is at risk of freezing, then the pipe must be
suitable insulated to protect from freezing.
If a suitable drain for accepting the condense waste is not available nearby to and below the boiler (e.g.
if the boiler is installed in a basement below ground level), then an (optional extra) condensate receptacle
and pump can be installed into the free space at the base of the appliance. This will collect and remove
condense water to a remote drain up to 5 metres height difference above the receptacle position.
Note: Blockage of the waste discharge will cause the unit to switch off by means of a built in level switch.
When making the condense waste pipe connection to the boiler, do not use adhesives, it is
recommended to lightly apply a suitable jointing tape (PTFE or similar) and use only light pressure to
connect fittings to the appliance to avoid damage to the condense waste outlet assembly. It is
recommended that the condense waste pipework should include a method of disconnection and
cleaning points.
5.7 electrical connections – general
The Strata 2-120 has a number of standard connection points. In addition, a number of panel locations
have been reserved for the installation controller, which can be mounted in the spaces provided after
removing the blank panels.
At the top of the boiler, behind the controllers, is a connector plate stretching across the entire width
of the boiler, flanked by three cable clamp brackets. All electrical connections are made via plugs and
sockets and to avoid mistakes during the connection of the cables, each plug has its own colour.
5.7.1 connecting the power supply
The incoming power supply (230V) must be connected to the black 3 pin Weiland plug located at the
far left hand side of the connectors mounting plate in the top area of the boiler. The unit has a 2-pole
on/off switch for the power supply of the entire boiler and all the connected controllers, pumps and valves.
Determine the cross sectional area of the power supply cable and take into account the power usage
of the combined components connected to the control units.
In addition each burner module has a single pole-switch to switch off one burner unit while the second
unit may continue to function. The main switch is protected by a 6.3 AT fuse.
CAUTION: The main power supply for the boiler must have a higher fuse value.