Instructions

PRESTIGE Solo 175 & 250
Service Parts Instructions
6
Check Ignition Cable and Ground Wire
1. Inspect the ignition cable from the igniter to the
control module. Replace if necessary.
2. Inspect the igniter ground wire for signs of dete-
rioration. Replace if necessary.
3. Ensure the ignition cable and igniter ground
wire are securely connected.
Check Control Wiring
1. Inspect all control wiring. Ensure wiring is in
good condition and properly connected.
Check Control Settings (MCBA)
1. Set the control display to PARAMETER mode
and check all boiler settings. Adjust settings as
necessary.
2. Check any external limit control settings (if
used). Adjust settings as necessary.
Check Control Settings (TriMax)
1. Review all boiler settings in the Heating & DHW
EZ Setup menus. Adjust settings as necessary.
2. Check any external limit control settings (if
used). Adjust settings as necessary.
Perform Start-up and Checkout Procedures
1. Start the unit and perform the start-up procedure
as referenced in the Boiler Installation Manual.
2. Verify the cold water fill pressure is correct and
the operating pressure of the boiler is within
normal operating range.
3. Complete the checkout procedures as refer-
enced in the Boiler Installation Manual.
Check Burner Flame
1. Inspect the burner flame through the observa-
tion port on the heat exchanger.
2. If flame pattern is not fully blue and covers
the entire burner surface during high fire, shut
the unit down and allow it to cool thoroughly
before dis-assembly.
3. Close the external manual gas valve on the gas
supply line and disconnect the gas piping and
gas valve wire harness connector.
4. Remove the top jacket access panel.
5. Disconnect the wiring harness connectors from
the blower and remove the blower retaining
screws using the extended Phillips/Torx head
screw driver provided in the kit. Remove the
blower with venturi and gas valve from the unit.
6. Remove the mounting nuts securing the burner
mounting plate to the heat exchanger and set
aside.
7. Carefully remove the burner mounting plate
assembly from the heat exchanger. Ensure com-
bustion chamber insulation is not damaged dur-
ing removal of burner mounting plate assembly.
See WARNING on page 13.
8. Remove the burner head mounting screws and
remove the burner head. Inspect the burner head for
deterioration. Use compressed air or a vacuum to
clean the burner head. Replace burner if necessary.
9. Remove the venturi and gas valve assembly
from the blower.
10. Use a vacuum cleaner or compressed air to
clean the interior of the blower and venturi.
Inspect the venturi and blower to ensure they
are clean and not damaged, replace if necessary.
11. Re-assemble the venturi and gas valve onto the
blower. Ensure the venturi gasket is in good
condition and positioned correctly. Replace gas-
ket if necessary. Tighten screws evently. See
Table 1, page 13 for torque specifications.
12. Re-assemble the burner head onto the burner
mounting plate. Ensure the burner head gasket
is in good condition and positioned correctly.
Replace gasket if necessary. Tighten screws
evenly. See Table 1, page 13 for torque specifi-
cations.