System Control - ElectraStream BEL 130 User Manual

2-1

System Control

Note
On twin coil systems the alternative heat
source supplements the electric.
2 2 2 2 2
CYLINDER
TEMPERATURE SENSOR
& THERMAL CUT-OUT
Fig. 2-1b Isolating Switch
Fig. 2-1c Thermal Cut-Out Thermostat
14
The heating and hot water system is all electric. The hot water for the taps (outlets) and
radiators is heated by the tri-core heater in the cylinder.
The system will have the following controls.
1
THERMOSTAIC
MIXING VALVE
UNVENTED CYLINDER
TRI-CORE HEATER
Fig. 2-1a Schematic of Typical Controls
2-1.1 Isolating Switch
The system will have a double pole isolating switch with neon and mechanical indicators.
This could be a pull cord or wall mounted type.
When the switch is ON (neon on) the system is operational.
When the switch is OFF (neon off) no hot water or heating will be available.
It is advised to turn the switch off when hot water and heating are not required, i.e.
holidays etc.
2-1.2 Electrastream Tri-core Heater
WARNING Unlike immersion heaters, the Electrastream tri-core heater
does not have an internal thermostat, therefore the cover should not need
to be removed.
When the cover is removed live electrical terminals are exposed.
ISOLATE THE TRI-CORE HEATER BEFORE REMOVING ITS COVER.
2-1.3 Over Temperature Cut-Out Thermostat
In the Electrastream temperature sensor box on the cylinder is the over temperature cut-
out thermostat. This prevents the water within the cylinder from overheating.
The over temperature cut-out thermostat is a manual reset type, this means it has a small
MANUAL RESET
BUTTON
button that pops up when the thermostat has been tripped by overheating.
To reset the system after overheating, switch heating and hot water OFF, allow time for
the water to cool, or run off some hot water, then remove the cap and press the button.
OPERA OPERATOR CONTROLS OPERA OPERA OPERA TOR CONTROLS TOR CONTROLS TOR CONTROLS TOR CONTROLS
COLD WATER OUTLETS
HOT WATER OUTLETS
ROOM THERMOSTAT
PUMP
MOTORISED VALVE
ELECTRASTREAM
CONTROL UNIT
ISOLATING SWITCH
2 2 2 2 2
CONSUMER UNIT
RC