Modulex EXT Commercial Series Boilers User Manual
CHAPTER 8: Maintenance Schedule
Page
120
of
144
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0095_0H
09/15/2017
Phone: 800-526-0288
GF-139
8.1 INSTRUCTIONS FOR INSPECTION AND MAINTENANCE
WARNING!
To ensure a long life of the boiler components and in order not to alter the conditions of
an approved product, ONLY original AERCO spare parts may be used.
Before servicing, always carry out the following steps:
1. Disconnect the mains electrical supply to the boiler.
2. Separate the boiler from the electrical supply by means of a separating device with an open
contact of at least 3 mm (for example, safety devices or power switches) and ensure that it
cannot be accidentally connected to power.
3. Close the external ON-OFF gas valve installed upstream of the boiler.
4. If necessary, and in keeping with the type of work to be carried out, close any ON-OFF
valves fitted on the C/H flow and return pipes, as well as the cold water inlet valve.
5. Remove the boiler front panel.
6. Perform the maintenance in keeping with official instructions and accepted standards and
regulations.
7. After completing all the necessary maintenance work, always follow these steps:
a) Open the C/H flow and return valves as well as the cold inlet valve (if previously closed).
b) Purge and, if necessary, 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 and full
maintenance should be done 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 siphon in particular.
