44
BOILER CONTROL: OPERATION
•
Low Water Cut Off: This is the default selection
on the control. When installing a probe type
low water cut off, locate the LWCO in the boiler
supply above the top jacket panel. A probe type
LWCO, such as the Hydrolevel 1150 or the
McDonnell & Miller RB-120 is recommended.
Refer to Figure 8.27 for recommended wiring.
•
FlowSwitch: A flow switch, such as the
McDonnell & Miller FS250, is designed to
trigger a blocking error immediately on a loss
of flow in the system. To protect from a false
flow reading on this type of device, the control
assures that the flow switch is open (indicating
no flow) before activating the General and the
CH or DHW circulator. After these pumps are
activated, it will not proceed into a trial for
ignition until the switch closes.
h. Flow Control Switch Open Check: This parameter
should be set to “ON” if the boiler is controlling
the GEN Pump. When set to ON (default), the
control checks the circuit from terminals 11 & 12
to make sure they are open when the pump is
off. If the boiler pump is wired externally and is
on continuously, set this parameter to “OFF” to
prevent nuisance lockouts on Flow Switch Not
Open (A23).
i. Ignition Attempts: The control is configured from
the factory to not allow the burner to recycle
after a failed ignition attempt. At installation,
the control can be configured to allow up to 3
ignition attempts before locking out and requiring
a manual reset. In addition, the control may be
configured to retry for ignition, one hour after
lockout without a manual reset. Check applicable
codes before changing these parameters.
j. Flame Failures: The control is configured from the
factory to not allow the burner to recycle after a
flame failure. At installation, the control can be
configured to allow up to 2 retries after a flame
failure before locking out and requiring a manual
control reset. In addition, the control may be
configured to retry for ignition one hour after a
lockout without a manual reset. Check applicable
codes before changing these parameters.
k. Air Adjustment: Screens #12 and #13 allow
the fan speed to be increased if required. The
following is an explanation of the conditions under
which these adjustments should be made.
Figure 8.27: Low Water Cut-off (LWCO) Wiring
Figure 8.28: Burner Settings – Flame Failures
Allowed
Figure 8.26: Burner Settings – Ignition Attempts
Allowed
Table 8.12: Ignition Attempts Ranges & Defaults
Table 8.13: Flame Failures Allowed Ranges &
Defaults
Parameter
Default
Minimum
Maximum
Ignition Attempts
Allowed
1
1
3
Ignition Attempts
1 Hr Retry
OFF
OFF
ON
Parameter
Default
Minimum
Maximum
Flame Failure
Retries Allowed
0
0
2
Flame Failure
1 Hr Retry
OFF
OFF
ON
Figure 8.29: Burner Settings – Air Adjustment
Figure 8.25: Burner Settings – Additional Safety
Functions
Managing Burner Only
Содержание PUREFIRE PFC-1000
Страница 1: ...PUREFIRE Boilers PFC 850 PFC 1000 PFC 1500 Gas Installation Operation Maintenance Manual ...
Страница 23: ...21 WATER PIPING CONTROLS Figure 4 4 Recommended Piping One Boiler with Multiple CH Zones One DHW Tank ...
Страница 24: ...22 WATER PIPING CONTROLS Figure 4 5 Recommended Piping Multiple Boilers with Multiple CH Zones One DHW Tank ...
Страница 62: ...60 START UP PROCEDURE J LIGHTING OPERATING INSTRUCTIONS Figure 9 1 Lighting Operating Instructions ...
Страница 80: ...78 REPAIR PARTS Figure 13 3a Jacket Assembly PFC 850 1000 Figure 13 3b Jacket Assembly PFC 1500 ...
Страница 82: ...80 Figure 13 4 Control System REPAIR PARTS ...
Страница 84: ...82 Figure 13 5 Condensate System REPAIR PARTS ...
Страница 89: ...87 APPENDIX B BURNER LCD STATUS SCREENS CH Burn Cycle DHW Burn Cycle Special Functions DHW Tank Warm Hold ...
Страница 90: ...88 APPENDIX C USER MENU APPENDIX C USER MENU Figure C 1 User Menu Managing Burner ...
Страница 91: ...89 APPENDIX C USER MENU Figure C 1 User Menu Dependent Burner ...
Страница 92: ...90 APPENDIX D INSTALLER MENU STRUCTURE APPENDIX D INSTALLER MENU STRUCTURE ...
Страница 93: ...91 APPENDIX D INSTALLER MENU STRUCTURE ...
Страница 95: ...93 SERVICE LOG SERVICE LOG Date Serviced By Description of Service Serial Number ...
Страница 96: ...94 NOTES ...
Страница 97: ...95 NOTES ...