User I Nform Ation; Safety Flue Therm Ostat; Replacem Ent Parts - UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual

1 1 .1 0 User I nform a t ion
Advise and dem onst rat ed t o User t he following
im port ant inform at ion:
A. How to light and turn off boiler. How to operate
syst em cont rols.
B. I m port ance of annual servicing of boiler t o
ensure safe and efficient operation.
C. Servicing or replacem ent of part s shall be carried
out by a qualified personnel.
D. Ensure boiler cont rols and room t herm ost at , if
fitted, are set to User's requirements.
E. Explain t o User an int ernal frost t herm ost at is
fitted in boiler, and electrical supply to boiler
m ust be left on for t herm ost at t o operat e.
F. Show User posit ion of pressure relief valve
discharge pipe.
G. Leave t his I nst allat ion, Operat ion and
Maint enance Manual wit h User.
1 1 .1 1 Sa fet y Flue Therm ost a t -
safety device.
Safety Flue Thermostat found on the flue inside the
boiler, interrupts flow of gas to the burner if the
t em perat ure overheat s.
Aft er verifying t he cause of t he t rip, press
2 seconds.
1 1 .1 2 Flue Pressure Sw it ch ( 1 2 5 - 1 5 0 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.
1 1 - GEN ERAL M AI N TEN AN CE AN D CLEAN I N G
DO NOT disable this
for about
When servicing t he appliance, check t he condit ion
and position of flame sensing electrode and
replace it if necessary.
1 1 .1 3 Repla cem ent Pa rt s
Perform Aut om at ic Calibrat ion procedure described in
sect ion 9.8 if one or m ore of t he following com ponent s
are replaced. Check and adj ust CO2% value as indicat ed
in t he Com bust ion Table.
Com ponent s replaced:
• Prim ary heat exchanger
• Fan
• Gas valve
• Gas orifice
• Burner
• Flam e sensing elect rode
• Spark elect rode
6 4
NOTICE
240013503 REV A, [ 03/ 15/ 2022]