User Information; Safety Flue Thermostat; Flue Pressure Switch; Replacement Parts - UTICA BOILERS MAHF-100 Manual

11.10 User Information

Advise and demonstrated to User the following
important information:
A. How to light and turn off boiler. How to operate
system controls.
B. Importance of annual servicing of boiler to
ensure safe and efficient operation.
C. Servicing or replacement of parts shall be carried
out by a qualified personnel.
D. Ensure boiler controls and room thermostat, if
fitted, are set to User's requirements.
E. Tell User about sealed system pressure.
F. Tell User if display is active and boiler has not
operated for 24 hours for heating or hot water,
the pump will automatically operate for 1
minute.
G. Explain to User an internal frost thermostat is
fitted in boiler, and electrical supply to boiler
must be left on for frost protection to operate.
H. Show User position of pressure relief valve
discharge pipe.
I. Leave this Installation, Operation and
Maintenance Manual with User for use on future
calls.
11.11 Safety Flue Thermostat - DO NOT disable this
safety device.
Safety Flue Thermostat found on the flue inside the
boiler, interrupts flow of gas to the burner if the
temperature overheats.
After verifying the cause of the trip, press
2 seconds.
11.12 Flue Pressure Switch (125-150 Only)
DO NOT disable this safety device.
This device, positioned inside the sealed chamber, interrupts flow of
gas to the burner if flue pressure exceeds 1.6 in w.c. (4 mbar).
Verify if vent is blocked before resetting the boiler.
11 - GENERAL MAINTENANCE AND CLEANING
for about
When servicing the appliance, check the condition
and position of flame sensing electrode and
replace it if necessary.

11.13 Replacement Parts

Perform Automatic Calibration procedure described in
section 9.8 if one or more of the following components
are replaced. Check and adjust CO2% value as indicated
in the Combustion Table.
Components replaced:
• Primary heat exchanger
• Fan
• Gas valve
• Gas orifice
• Burner
• Flame sensing electrode
• Spark electrode
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NOTICE
240013371 REV B, [10/01/2021]