21. Electrical
Connections
The boiler has a “Wieland” plug connector
for connection to the mains as part of the
wiring centre located at the bottom left hand
side of the boiler.
Any external wiring to the boiler must
be carried out in accordance with the IEE
Wiring Regulations and any local
regulations.
The EC VCO MODELS is designed for 230
~ 240v 50Hz single phase operation. The
method of connection to the mains supply
should allow for complete electrical isolation
of the boiler, preferably by labelled double
pole switched spur. The boiler must be
protected by a 3 amp fuse.
The point of connection to the mains should
be readily accessible and adjacent to the
boiler. If the boiler is to be sited in a
bathroom the connection should be outside
the room.
It is essential that the electrical supply in the
property should be properly earthed in
accordance with current IEE Wiring
Regulations.
Figure 28
Connecting to the Mains
`
Using 3 core 1.5mm
2
cable connect the
boiler to the mains electrical supply by
passing the cable through the cable duct
and connecting to the Wieland connector as
shown in figure 28.
22. Heating
Control
Options
There are various ways of controlling the
heating system from the boiler.
Using a regular room thermostat.
If a room thermostat is installed there must
not be any thermostatic radiator valves on
the radiator in that room.
Using a RE2132 room unit
With this special type of room thermostat,
available only from eco hometec, the boiler
can be regulated in a modulating fashion.
Please contact the eco hometec technical
department for more information.
If a RE2132 room unit is installed there
must not be any thermostatic radiator valves
on the radiator in that room.
Using the built-in weather compensating
control
This only requires an outside temperature
sensor. (
Mounted on North facing wall
)
The on board boiler weather compensating
controller is adjusted so the relationship
between the outside temperature and the
boilers flow temperature is sufficient to
maintain the building temperature.
As the outside air temperature rises and
falls a modulating control is achieved. Set
up this way the temperature for the house is
not controlled from one room, but on the
basis of the outside temperature.
Using a regular room thermostat, it is also
possible to change the relationship between
the outside temperature and the supply
temperature. Outside temperature is the
preferred control if control from one room is
not required or not possible. If outside
temperature control is used, the radiators
must be fitted with thermostatic valves.
22.1
240 Volt Connections
The 240 volt terminal strip can be used to
connect the following.
External pump(s) with a maximum of 500
Watt. This connection will supply external
pump(s) when the boilers integral pump is
running.
A 240 Volt room thermostat.
EC 16~38 Installation Manual page
33
