CFH Startup Guide
6
Part No. 750-293
1.6 Safety Controls
Users should take note of the safety controls installed as standard on the Model CFH. Minor adjustments
to the initial factory settings of some controls may be necessary for your particular installation.
It is required to test all controls for proper functioning prior to starting the boiler for the first time.
Step-
by-step procedures for testing the controls can be found in the CFH manual (
Chapter 4 - Commissioning
).
The primary flame safety control is the CB Falcon, which monitors the flame signal by means of an
ionization electrode installed in proximity to the burner canister.
Other
Combustion Safety Controls
(see
Figure 5
) include the following:
• Combustion Air Proving Switch
• Low Gas Pressure Switch
• High Gas Pressure Switch
• Dual Safety Shut-off Valve (SSOV)
Depress all manual reset buttons for all controls prior to starting the boiler.
Figure 5 Combustion Safety Controls at Burner
Water Level Controls
(see
Figure 6
)
The primary Low Water Cutoff and pump control level probes are mounted in an external water column.
The Auxiliary Low Water Cutoff is mounted in the boiler vessel or optional external column. Control boards
for the LWCO and ALWCO are located in the boiler control panel. The ALWCO includes a panel-mounted
reset/test switch.
Figure 6 Water Level Controls
Low Gas Pressure Switch
High Gas Pressure Switch
Combustion Air
Proving Switch
Flame Rod
(Ionization Electrode)
Dual SSOV
ALWCO Co
n
t
r
ol
w/Reset
LWCO & P
um
p Co
n
t
r
ol
CB Falco
n
Co
n
t
r
olle
r
Control panel interior
LWCO
ALWCO
