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COMMISSIONING
The commissioning and first firing of the boiler must
only be done by a competent person.
Gas installation
It is recommended that any air is purged from the
supply at the gas inlet test point on the lower right
hand side of the gas valve, see diagram 19.
Filling the system
Open shut off valves (see diag. 6 or 7 as appropri-
ate) (slot of screw corresponds to flow direction), and
caps on automatic air vents on top RHS of boiler.
Bleed each radiator until a continuous jet of water
is obtained.
Do not close automatic air vent caps on top of
boiler.
Open various hot water taps to bleed system.
Make sure that pressure gauge reads between 1
and 2 bar. Re-pressurise system as necessary.
Important:
- When venting air from boiler, do not touch the
schrader valve on the expansion vessel, it is NOT a
vent.
- When the mains supply is connected to the boiler,
or after a reset, the three way valve (Ecosy 24 E and
Ecosy 28 E only) is activated for approx. 15 seconds
and switched to the heating circuit. The pump will
run for 1 minute. After this period, the three way valve
returns to the cylinder circuit.
- If, during a 24 hour period, there has been no heat-
ing demand, the above procedure is automatically
repeated. This is quite normal and is a function of the
electronic control to prevent the possibility of the
valve and pump sticking.
Starting the boiler
Before starting the boiler check that:
- The gas meter tap is open.
- The boiler gas service cock is open.
- The boiler is connected to the electrical supply.
First starting up
Following the instructions given in the 'Controls and
Lighting' section, set boiler to run in central heating mode.
Set room thermostat for maximum temperature and
check that external controls, if fitted, are calling for heat.
Allow the temperature to rise to the maximum val-
ue, with all radiator valves open.
Note: The Ecosy boilers start at reduced output for 10
minutes before running at full output. This is a function
of the adaptive electronic boiler control and is quite
normal.
The temperature rise will cause release of the gases
contained in the water of central heating system.
- Gases driven towards the boiler will be automati-
cally released through the automatic air vents.
- The gases trapped at the highest point of the sys-
tem must be released by bleeding the radiators.
On reaching maximum temperature, the boiler should
be turned off and the system drained as rapidly as
possible whilst still hot.
Refill system to a pressure of 1 bar and vent as be-
fore.
Restart boiler and operate until a maximum tem-
perature is reached. Shut down boiler and vent heat-
ing system. If necessary, top up heating system and
make sure that a pressure of 1 bar is indicated on the
pressure gauge when system is COLD.
Gas pressures
The Ecosy boilers are fully automatic in operation,
adjusting the gas rate to the optimum for the type of
system and conditions. It is not possible to manually
adjust the burner pressure but it is necessary to en-
sure that there is a constant inlet working pressure of
20 mbar measured at gas valve. Proceed as follows:
Shut down boiler.
Undo screw on gas inlet test point on lower right
hand side of gas valve, see diagram 19.
Connect a suitable pressure gauge.
Start boiler as described in 'Instructions for Use'.
To check the inlet working pressure, the boiler has to
be held at full gas rate. Proceed as follows:
Press the 'Mode' and '+' buttons simultaneously - the
letter H is displayed and the boiler is now running at
full gas rate.
Check that there is a pressure of 20 mbar (G20), 28-
30 mbar (G30), 37 mbar (G31).
If the pressure is insufficient, it is necessary to check
the gas supply/pipework and correct any fault.
Note. The central heating operation of the boiler may
seem to operate correctly with less inlet working
pressure but the economy of the boiler will not be
optimum. In any case, an insufficient inlet pressure
will adversely affect hot water performance.
Press the 'Reset' button. The boiler will revert to nor-
mal running, that is, will not be held at full gas rate.
Note.
1) After a period of 20 minutes, the boiler will auto-
matically revert to normal running.
2) During full gas rate operation, all safety devices
can function fully.
Shut down boiler.
Remove pressure gauge, tighten up test point screw
and check for gas soundness.
Diagram 19
b
17
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