Modulex Light Commercial Series
CHAPTER 9: Spare Parts Drawings and Lists
OMM-0158_A
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a) Open the C/H flow and return valves as well as the cold inlet valve (if previously closed).
b) Purge and, if necessa
ry, proceed with restoring the heating system’s pressure until a
pressure of 0.8
– 1.0 bar is reached.
c) Open the external ON-OFF gas valve installed upstream of the boiler.
d) Reconnect the appliance to the electrical supply and switch on the mains electrical supply.
e) Test for correct operation, on the gas side and on the water side.
8. Replace the boiler front panel.
8.2 Periodic Examination Of Venting System
The inspection of the boiler and venting system should be performed every year, full maintenance
every two years. Please contact AERCO for further guidance on the frequency of maintenance
and service requirements. Contact details can be found on the back page of this manual.
Verify that the air ventilation system, air intake and air intake pipes are unobstructed.
8.3 Proper Procedure For Cleaning Exhaust Flue
The flue exhaust system, including condensate evacuation, should be checked annually. Annual
maintenance includes verifying that the flue manifold and exhaust vents are clean and
unobstructed. It is necessary to inspect and clean the condensate drain pipe in particular.
Cleaning the Condensate Drain Line
1. Refer to Figure 8-1, disconnect the pipe at location (A).
2. Use clean water to flush out any depositsthat may have accumulated inside the drain.
3. Reassemble the drain pipe in reverse order.
Figure 8-1: Condensate Drain Location
W A R N I N G !
Before operating the boiler, it is absolutely necessary to verify that the condensate P-trap is filled
with water. If the boiler is operated without the P-trap being properly filled, there is a danger of
toxic combustion gases escaping from the unfilled condensate drain opening.
