The Electrastream System - ElectraStream BEL 130 User Manual

1-4

The Electrastream System

1 1 1 1 1
Note
All installations must comply with relevant
regulations - refer to section 4-1.
Note
The alternative heat source must be
configured correctly to be used with the
GAH Electrastream system.
Note
The final fill of the heating system should
include the correct percentage of suitable
scale/corrosion inhibitor.
12
1-4.1 Hot & Cold Water Supply
Refer to fig. 1-2a for Electrastream.
Refer to fig. 1-2b for Electrastream Twin Coil
The incoming mains water supply is connected to the combination valve which is
assembled to the unvented indirect hot water cylinder. The combination valve has an
integral check valve. A single check valve is supplied, this is only required to be fitted if
back syphonage is possible from any item fitted prior to the combination valve.
Provision should also be provided in the cold supply for:-
1. Heating system fill.
2. Drinking water.
3. Water softener (when applicable).
4. Outside tap (when applicable).
The combination valve limits the incoming pressure to 3.5 Bar, it has an integral non-
return valve and pressure relief valve (PRV).
Supply to the hot outlets is taken from the cylinder and mixed with cold water by the
thermostatic mixing valve, this ensures that a safer lower temperature hot water is
available at outlets.
Cold supply to all outlets is taken direct from the main supply. If the mains pressure is
high (over 3.5 Bar) a 3.5 Bar pressure reducing valve is recommended.
1-4.2 Twin Coil - Alternative Heat Source
Twin Coil Cylinders have two coils, the upper coil is connected to the Electrastream
heating system. The Electrastream high powered titanium electric tri-core heater is
positioned about halfway up the cylinder so that it is only used to heat the water in the
upper part of the cylinder.
The lower coil is heated by the chosen alternative heat source (e.g. solar), this will heat
the water in the whole cylinder when 'energy' is available resulting in optimum efficiency.
1-4.3 System Control
The Electrastream system is controlled by a purpose designed Electrastream Control
Unit, this controls the hot water and heating ON/OFF times together with the heating
pump and valve. The control also has a dedicated programme that ensures efficient use
of electricity by selecting how many of the three immersion heater elements are required
to meet the current demand for heating or hot water.
1-4.4 Heating System
The heating system is for water filled radiators on a standard 'sealed system'. The water
for the heating is heated by being pumped through the indirect coil of the cylinder. A
room thermostat and the Electrastream Control Unit's programmable timers control the
circulating pump and motorised valve.
1-4.5 Electric System
The unvented cylinder is heated by a 240V, 9kW (combined 3 x 3kW) titanium tri-core
heater. This is controlled by the cylinder temperature sensor and the Electrastream
Control Unit.
Electrastream is designed to make full use of economy tariff electricity supplies and the
wiring must be arranged to make full use of this.
INTRODUCTION 1 INTRODUCTION 1 INTRODUCTION 1 INTRODUCTION 1 INTRODUCTION 1