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2.3 COMMISSIONING
It is essential that all systems function properly for optimum performance. To achieve
this, the primary system should be commissioned in accordance with good practice
and generally in accordance with the requirements of BS 6798, BS 5449 and BS 7593.
Full details of the requirements are given in PAS 33:1999 under section 10
Commissioning.
Cleansing the Primary System
When using either cleansing or corrosion inhibitor chemical, the manufacturers
instructions must be followed.
When determining the quantity of cleanser required, be sure to allow for the
increased volume of water in the primary circuit due to the thermal store. See
section 1.2 Technical Data for volumes.
Primary Water System Treatment
Although the ElectraMate 2000 has no special water treatment requirements, the
radiators and other parts of the circuit will benefit from the application of a scale and
corrosion inhibitor such as Sentinel X100 or a protector such as Fernox MB1.
When determining the quantity of inhibitor required, be sure to allow for the increased
volume of water in the primary circuit due to the thermal store - see Section 1.2
Technical Data for volumes.
The following procedures should be used during the final fill/before
commissioning the appliance.
1.
Isolate the heating element temporarily by removing the two 30 amp fuses and
put them in a safe place.
2.
Check the air pressure in the expansion vessel is set to the correct pressure and
adjust if necessary.
3.
Open the automatic air vent which is positioned at the top of the appliance.
4.
Open the incoming stop valve and fill the domestic mains cold and hot water
systems.
5.
Open the 90º angle isolating valve provided immediately upstream of the C.A
Valve to fill the appliance/sealed heating system. The whole of the primary sealed
heating system will automatically be filled to 1.0 bar with potable water through
the pressure regulating and CA type backflow prevention valves provided as part
of the ElectraMate 2000. Add inhibitor to the system in the normal way whilst the
system is filling. Once full check the whole of the primary heating and domestic
hot and cold distribution systems for leaks.
6.
Once the system has been filled the electrical connection and system controls
should be checked in line with page 25. Once this has been done the system
should be operated for a few minutes without the heating elements being
switched on which will allow any air trapped in the system to be vented. The
appliance should be switched on and the heating pump should be activated by
operating the programmable room thermostat in line with the instructions on
page 25. The automatic air vent should remain open until all air has been removed
from the system.
NOTE : Pump speeds should be set as follows:
The space heating pump should be set at a speed at which the temperature difference
across the heating circuit close to the unit boiler is at least 11°C or as specified by the
system designers. The pump characteristics are shown in Section 1.2 Technical Data.
The domestic hot water plate heat exchanger pump should always be set at maximum
speed (i.e. speed III)
The boiler flow pump should always be set at speed III.
2.0 INSTALLATION
Once all the air has been vented from the
system the two 30 amp fuses should be
replaced and the heating element should be
checked for its correct operation which will be
indicated by a current draw of approximately
45 amps on the incoming supply.
Check the operation of the appliance in line
with the instructions on page 26.
After all the air in the system has been vented,
which could be several days, the automatic
air vent should be closed to prevent any
possibility of a leak in the event that any system
debris finds its way into the valve.
ONCE THE COMMISSIONING PROCESS IS
COMPLETE DO NOT SWITCH THIS APPLIANCE
OFF AT THE ISOLATOR SWITCH EVEN WHEN
THE PROPERTY IS EMPTY. THE PUMPS ARE
TURNED AUTOMATICALLY EVERY 24 HOURS
TO PREVENT THEM STICKING AND THIS
WILL NOT HAPPEN IF THE APPLIANCE IS
ISOLATED. THE ROOM THERMOSTAT CAN
BE TURNED DOWN SO THAT THE HEATING
WILL NOT OPERATE. THE RUNNING COSTS
WILL THEN ONLY BE ENOUGH TO KEEP THE
APPLIANCE ON STANDBY.
Powerflushing/Cleaning of the Heating
System
If it is proposed to 'powerflush' the heating
system we would recommend that the
ElectraMate appliance is isolated from the
heating system being cleaned. Failure to do
this could seriously damage the appliance.
When carrying out the work always comply
fully with the manufacturers instructions for
the powerflushing equipment being used- See
Section 10.
If in any doubt please consult our Technical
Helpline.
Page 23
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