Install Instructions

Check Control Wiring
Inspect all control wiring. Ensure wiring is in
good condition and properly connected.
Check Control Settings
1. Check the control CH/DHW/parameter set-
tings by pressing the thermometer button
“ ” on control display. When the LED is
lit for “ ” this is the CH setting. When
the LED is lit for “ ” this is the DHW set-
ting. Adjust settings with “ ” or “ ” but-
tons as necessary.
2. Press the reset button to close the set-
ting menu and store the changes.
3. Check any external limit control settings (if
used). Adjust settings as necessary.
Perform Start-up and Checkout Procedures
Start the appliance and perform the start-up
procedure as listed in this manual.
Verify the cold water fill pressure is correct and
the operating pressure of the boiler is within
normal operating range.
Complete the checkout procedures as refer-
enced in this manual.
Check Burner Flame
Inspect the burner flame through the observa-
tion port on left side off the heat exchanger.
Verify flame pattern is blue and covers the entire
burner surface during high fire. Ensure combus-
tion at both high and lowfire meet the require-
ments listed in Table 5, page 44. If combustion is
OK and flame pattern is not fully blue & covers
the entire burner surface during highfire, shut the
appliance down and allow it to cool thoroughly
before disassembly.
Close the external manual gas valve on the gas
supply line and disconnect the gas piping and
electrical connector to the gas valve inside the
appliance.
Disconnect the wiring harness connectors from
the blower.
Remove the mounting bolts and washers secur-
ing the front of the heat exchanger and set bolts
and washers aside.
Carefully remove the front plate of the heat
exchanger. Ensure combustion chamber insula-
tion is not damaged during removal. See
WARNING on page 68.
Remove the burner head mounting screws and
remove the burner head. Inspect the burner head
for deterioration. Use compressed air or a vac-
uum to clean the burner head. Replace burner
head if necessary. Replace burner head gasket.
Re-assemble the burner head and burner head
gasket. Ensure mounting screws are tight.
Remove the blower.
Use a vacuum cleaner or compressed air to
clean the interior of the blower and venturi
assembly. Inspect the blower blades to ensure
they are clean and not damaged.
Re-assemble the blower and venturi onto front
plate of the heat exchanger . Ensure all gas-
kets are in good condition, and positioned cor-
rectly. Replace gaskets if necessary.
Re-assemble the front plate of the heat
exchanger with bolts and washers onto the heat
exchanger. Ensure the gasket and combustion
chamber insulation is in place and not dam-
aged, replace gasket and insulation if neces-
sary. See WARNING on page 68. Ensure all
screws and bolts are tight.
Reconnect the wiring harness connectors to the
blower.
Re-assemble the gas supply connections and
electrical connector to gas valve inside the
appliance. Open the external manual gas valve.
Check gas piping for any leaks as outlined on
Maintenance Procedures
66