CleaverBrooks CFC ClearFire User Manual

Model CFC ClearFire Commercial Boilers
68 Rev. 05-2012
3. Main Voltage Connection - 115V/single phase/60Hz
4. Local/Remote demand switch
5. Combustion Air Proving Switch - This input is used for proving airflow sufficient
for proper combustion throughout the burner run sequence.
6. High Air Pressure Switch - prevents boiler operation in the event of high stack
back pressure (blocked flue or condensate drain).
7. Gas Pressure Switch - Gas pressure switches for low gas pressure and high gas
pressure prevent the burner from being activated if either is open. Each switch
is a physical manual reset device, requiring physical depression of the reset
button if either switch is not closed prior to burner start or during burner
operation.
8. NTC (Negative Temperature Coefficient) Thermistor Inputs (10k @ 25
o
C)
A.Flow Temperature (Outlet water temperature)
B.Return Temperature (Inlet water temperature)
C.Optional Domestic Water Temperature
D.Optional Outdoor Temperature
E.Optional Stack Temperature
F.Optional Header Temperature
9. System Configuration - CB Falcon configuration is arranged into the following
functional groups:
Table B5-29. CB Falcon burner sequence (Central Heat)
1. Heat request detected (CH demand)
2. CH pump switched on
3. Safe Start Check, dynamic ILK input test (if enabled), blower switched on
4. If ILK input and CAPS switch closed and purge rate fan speed achieved, begin 15
second prepurge
5. When purge complete, blower RPM changed to lightoff speed
6. Trial for Ignition - 4 seconds*
7. Ignition and gas valve switched on*
8. Ignition turned off at the end of direct ignition period; 5 sec. stabilization time*
9. Release to modulation (Run)
10. At the end of CH heat request, burner is switched off and blower stays on for 15
sec. post purge period. Boiler enters standby mode.
*CFC 3300 uses pilot ignition - lightoff sequence will vary accordingly
System Identication and
Accesss
CH - Central Heat
Outdoor Reset
DHW - Domestic Hot Water
DHW Storage
DHW Plate
Warm Weather Shutdown
Demand Priority
Modulation Conguration
Pump Conguration
Statistics Conguration
High Limit
Stack Limit
Delta T Limits
T-Rise Limit
Heat Exchanger High Limit
Anti-condensation
Frost Protection
Conguration
Annunciation Conguration
Burner Control Interlocks

CleaverBrooks CFC ClearFire Specifications

General

Brand	CleaverBrooks
Model	CFC ClearFire
Category	Boiler
Language	English