Commissioning - Baxi Megaflo System I5 HE IE Installation & Servicing Instructions Manual

Pump
Fig. 52
Selector Switch
Display
Central Heating
Temperature Control
Fig. 54
32
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Supplied By www.heating spares.co Tel. 0161 620 6677
Heat Exchanger
Automatic Air Vent
Fig. 51
Screw
Pump
Automatic Air
Vent
2
bar
Fig. 53
2
bar
Calibration Control

11.0 Commissioning

11.1
1. Reference should be made to BS:EN 12828 & 14336 when
commissioning the boiler.
2. At the time of commissioning, complete all relevant
sections of the Benchmark Checklist at the rear of this
publications.
IMPORTANT: The heat exchanger air vent on top of the
boiler (Fig. 51) MUST be opened before filling the primary
system.
3. On sealed systems ensure that the filling loop is connected
and open, and on 'semi-sealed' systems the feed to the
header tank is open. Open the heating flow and return valves
on the boiler.
4. Open the screw on the automatic air vent on the pump
body (Fig. 52).
5. The system must be flushed in accordance with BS 7593
(see Section 6.2) and the flushing agent manufacturers
instructions.
6. On sealed systems it is recommended to pressurise the
system to 1.5 bar then close and disconnect the filling loop.
On 'semi-sealed' systems ensure that the gauge is showing at
least 0.2 bar.
Pressure Gauge
7. Turn the gas supply on and purge the system according to
I.S. 813 "Domestic Gas Installations".
8. Test for gas tightness.
9. Hinge the facia panel upwards and refit the case front
panel. Tighten the securing screws.
IMPORTANT: The combustion for this appliance has
been checked, adjusted and preset at the factory for
operation on the gas type specified on the appliance data
plate. No measurement of the combustion is necessary.
Do not adjust the air/gas ratio valve.
10. Having checked:
• That the boiler has been installed in accordance with
these instructions.
• The integrity of the flue system and the flue seals.
• The integrity of the boiler combustion circuit and the
relevant seals.
Proceed to put the boiler into operation as follows:
Commissioning the Boiler