Dunkirk Q95M-200 Modulating Condensing Boiler User Manual
Page 8
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• [1180] Post-purge. When room thermostat is satisfied
(call for heat ended), burner turns off. Blower continues
for 15-second post-purge, then turns off. If another
call for heat occurs, boiler remains off for ten seconds
before starting again, and display shows [6180].
• [0180] No call for heat. Boiler is in standby mode
(waiting for heat call).
7.
Repeat steps 1-6 several times to verify operation.
8.
Return room thermostat to normal setting.
Verify Operation – DHW
1.
If necessary, reconnect DHW aquastat wiring to boiler.
2.
Turn off power to boiler at service switch.
3.
Wait few seconds, turn on power to boiler.
[A150]
Self-check on power-up for a few seconds.
[0150] No call for heat.
4.
Raise DHW aquastat above tank temperature to call for
heat.
• [5150] Blower/DHW circulator on. Blower and DHW
circulator energize and control checks for air flow.
• [1150] Pre-purge. Blower speed increases to ignition
speed. Blower runs in pre-purge for 10 seconds.
• [2150] Ignition. After pre-purge, control module opens
gas valve and starts ignition spark.
• If burner flame proves within 4.5 seconds, burner
continues to fire. Burner fires at startup rate for about
10 seconds to allow flame to stabilize.
• If burner flame does not prove within 4.5 seconds,
control module attempts ignition sequence again.
Flame must prove within 5 attempts or control will
lockout (display will show [E 02]).
• Verify flame failure operation by closing boiler manual
gas valve to prevent gas flow. Open gas valve after
testing.
• [4150] Burner on, DHW. Once flame is proven and
stable, burner is allowed to modulate. Firing rate
depends on actual outlet water temperature versus
target temperature.
5.
Allow boiler to bring water temperature to target
temperature.
• [6150] Target temperature reached. Burner shuts
down. Blower runs in post-purge, then turns off. DHW
circulator continues to run as long as there is call for
DHW heating.
6.
Lower DHW aquastat to stop call for heat.
• [1150] Post-purge. When room thermostat is satisfied
(call for heat ended), burner turns off. Blower continues
for 15 second post-purge, then turns off. If another
DHW heat call occurs, boiler begins heating cycle after
10 second delay. If CH call for heat occurs after DHW
demand, heating cycle begins after 30 second delay.
• [8150] DHW circulator run-on. DHW circulator
continues to run for 30 seconds.
• [0150] No call for heat. Boiler is now in standby mode
(waiting for heat call).
7.
Repeat steps 1-6 several times to verify operation.
8.
Return DHW aquastat to normal setting.
Operating Information
1.
To check operating conditions (Ex - actual or target
temperature), see “User Interface Quick Reference”
Section 10 page 21, for explanation of boiler control’s
“Information” mode.
2.
During normal operation (no shutdown or lockout),
right 3 display digits show actual boiler outlet water
temperature.
Perform Check-out Procedures
Complete “Checkout Procedures and Adjustments” as
indicated in Section 6 page 9.
Replace boiler front jacket panel after performing any service
to boiler.
5 - BOILER STARTUP