Camus Hydronics DMH 081 Installation, Operation And Service Manual page 45

SYMPTOM
• Supply Gas Issue
• Air/Gas Mixture Issue
Noisy Operation
• Air Inlet and/or Vent
configuration
• Dirty/ Damaged Burner
• Air in the piping system
• Incorrect Igniter Gap
• The supply/ outlet temperature
has exceeded the setpoint
temperature specified.
Auto Reset High
Limit Trips
• A03 appears on boiler display.
• Manual Reset Safety High Lmit
Manual Reset
High Limit Trips
(Pressing the
manual RESET
on the DynaMax
Control Panel will
be required to
restart the ignition
sequence)
• Actual fan RPM is 30% slower
Fan Speed Too
than target fan speed.
Low
• Actual fan RPM is 30% faster
than what is required.
Fan Speed Too
High
FAILURE MODE
tripped, supply/outlet
temperature in excess of
o
210 F
ANALYSIS
• Refer to Part 3 Gas Connection in this manual.
• Natural Gas Pressure should read between 3" w.c.
and 14" w.c.
• L.P. Gas Pressure should be at 11" w.c.
• Refer to Gas Valve Adjustment Procedure in section
10.2 of this manual for the proper combustion
setting.
• Refer to Part 2 Air Inlet and Venting
• Refer to Burner Maintenance in section 11.7 of this
manual for the burner removal and inspection
procedure. Clean or replace the burner, if required.
• Purge all air from the piping system
• Check that spark gap is 3/16"
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the boiler is piped properly. Refer to
Piping Diagrams in Section 13 of this manual.
• 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 DynaMax Controller if necessary
• Verify that the capillary tube is broken. If this is the
case, replace Manual Reset High Limit
• Verify that the system is full of water and that all air
has been properly purged from the system.
• Verify that the boiler is piped properly. Refer to
Piping Diagrams in Section 13 of this manual.
• Verify that 120 VAC 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 120 VAC is
supplied. If so, pump impeller may be stuck. Use a
flat head screwdriver on face of pump to turn
impeller manually.
• If 120 VAC is present during a call for heat, but the
pump still does not circulate, replace pump.
• Verify wiring connections at the fan and DynaMax
Controller.
• Replace the fan
• Replace the DynaMax Controller.
• Vent/ Air Inlet Lengths exceed the maximum allowed
equivalent lengths. Refer to Air Inlet and Venting
Section in Part 2 of this manual.
• Verify that there are no obstructions in the vent/ air
inlet pipes or at terminations
• Verify wiring connections at the fan and DynaMax
Controller.
• Replace the fan
• Replace the DynaMax Controller.
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