Camus Hydronics DRH300, Installation, Operation And Service Manual

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50
COMPONENT FAILURE MODE ANALYSIS
Flame Disappears
During a Run
Cycle
•
The Dynaforce® boiler was
running and flame signal suddenly
disappeared.
•
Lockout: 106, 107, 108, 109
• Verify that all air has been purged from gas line
• Verify that boiler is properly grounded
• Inspect flame sensor and associated wiring. Replace if
necessary
• Check for flame sensor cracks in the insulator or continuity
to ground
• Adjust the air proving switch. Turn counter-clockwise to
reduce sensitivity
• Adjust the blocked flue switch. Turn clockwise to reduce
sensitivity
• Verify incoming gas supply pressure and that it coincides
with Table 7.
• Verify that the gas line connections to the boiler are
adequate. Refer to Table 6.
• Verify that the vent/ air inlet piping (if equipped) are
correctly installed and obstructions are not present
• Verify that 24 VAC is being supplied to the gas valve during
operation. If a signal cannot be detected, the transformer
needs to be replaced
• Inspect the burner. Refer to Burner Maintenance in section
10.5
• Replace the Dynaforce® Controller if necessary
Noisy Operation
• Supply Gas Issue
• Refer to Part 3 Gas Connection in this manual.
• Natural Gas Pressure reads between 3” w.c. and 14” w.c.
• L.P. Gas Pressure should be at 11” w.c.
• Air/Gas Mixture Issue • Refer to Section 8.3 Gas Valve Adjustment Procedure for
proper combustion setting.
• Air Inlet and/or Vent configuration
• Refer to Part 2 Air Inlet and Venting
• Dirty/ Damaged Burner • Refer to Burner Maintenance in section 10.5 of this manual
for the burner removal and inspection procedure. Clean or
replace the burner, if required.
• Fan is vibrating • Check that all fan bolts are torqued to 20 lb-ft (DR300 –
1000), 25 lb-ft (DR1200 – 5000)
• Air in the piping system
• Purge all air from the piping system
Auto Reset High
Limit Trips
• The outlet temperature has
exceeded the set point
temperature specified.
• Alert: 67, 79, 137, 303-310
• ILK OFF
• Verify that the system is full of water and that all air has
been properly purged from the system.
• Verify that ∆ T does not exceed 30
o
F across the heat
exchanger
• Verify that the boiler is piped properly.
• Verify that 120VAC is being supplied to the boiler pump on
a call for heat. If voltage cannot be detected check wiring.
• Verify that the pump is circulating when 120VAC is
detected. If not, pump impeller may be stuck. Use a flat
head screwdriver on face of pump to turn impeller manually
• If 120VAC is present during a call for heat, but the pump still
does not circulate, replace the pump.
• Replace the main Dynaforce® Controller if necessary