CleaverBrooks CFC-500 Operation, Service And Parts Manual page 135

3. Ground to central ground terminal, not to Ground on
J4 terminal 12.
Limit String and Annunciator inputs and
Safety Load Outputs
1. Wiring to connectors J4, J5, J6 and J7.
2. Line Voltage (120Vac) or Low Voltage (24Vac) by model
number.
Dry Contacts available for:
1. Pump A: Connector J4 terminal 6 & 7.
2. Pump B: Connector J4 terminal 4 & 5.
3. Pump C: Connector J4 terminal 2 & 3.
4. Blower: Connector J5 terminal 6 & 7.
5. Alarm: Connector J6 terminal 7 & 8.
Wiring Connectors J2, J8, J9, and J10
Low Voltage Connections
(includes NTC Sensor Inputs, 4 to 20 mA
Input, PWM Combustion Blower Motor
output, combustion blower speed
(tachometer) input, Remote and TOD reset,
current and voltage outputs)
1. Wire according to specifications, following all local ordi-
nances and requirements.
2. Do not bundle the low voltage wires with the ignition
cable, 120 Vac wires, CH Pump or DHW Pump.
3. Bundle the wires for the fan and join them with the other
24V low-voltage wires.
4. Bundle the wires for the NTC sensors and the PWM
combustion blower control separately.
High Voltage Cable
1. Always use a grommet when placing the high voltage
cable through a sheet metal panel.
2. Never join the high voltage cable with other wires.
• Be sure that there is a good electrical return path between
the Falcon and sparking electrode (ground connection).
• A short ignition wire normally leads to lower levels of
radiated electromagnetic fields.
• Use a Spark cable (32004766 or R1298020) or equivalent.
• Heat-resistant up to 248°F (120°C).
• Isolation voltage up to 25 kV DC.
Note that the high voltage ignition spark, the high voltage
ignition lead and the return path of the current that flows during
sparking is an important source of electromagnetic
interference.
Application Recommended Wire Size
Line Voltage 14, 16, 18 AWG Copper
Terminals conductor, 600 volt
insulations, moisture-
resistance wire
Remote Reset/ 22 AWG two-wire twisted
TOD pair, insulated for low voltage
A ground return wire is required in the appliance to reduce the
high frequency components of the actual return current.
Communications: Connector J3
1. The ECOM port - connectors J3 terminal 1, J3 terminal
2, J3 terminal 3 - is not used in CB Falcon aplications Do
not connect the display to these connectors.
2. Connect the 833-3577/3725 Display to either J3 Modbus
port (MB1 or MB2), connectors a, b, c.
Flame Signal: Connector J1
1. Flame Rod: Single Element
a. Connect the Flame rod for both ignition spark and
b. Connect the Flame rod ground to connector J1 termi-
c. Install a jumper between connector J1 terminal 1 and
2. Flame Rod: Dual Element (separate elements for ignition
spark and flame sense)
a. Connect the Flame rod sense lead to connector J1
b. Connect the Flame rod ground to connector J1 termi-
c. Do not route the Flame rod sense lead wire or
UV Flame Detection
1. Connect the UV Flame detector sense lead (blue wire) to
connector J1 terminal 4.
2. Connect the UV Flame detector ground lead (white wire)
to connector J1 terminal 6.
3. Do not route the UV Flame detector wiring near the igni-
tion spark high-voltage cable or other line voltage wiring.
Final Wiring Check
1. Check the power supply circuit. The voltage and fre-
quency tolerance must match those of the Falcon. A
separate power supply circuit may be required for the
Falcon. Add the required disconnect means and over-
load protection.
2. Check all wiring circuits.
3. Install all electrical connectors.
4. Restore power to the panel.
The Falcon can be removed and replaced in the field without
requiring re-wiring.
The lengths of the wires and electrical ratings for each terminal
are specified in Table 4 on page 15.
Table 2. Wire Sizes.
Recommended Part Number(s)
TTW60C, THW75C, THHN90C
Beldon 8443 or equivalent
11
flame sense to the ignition transformer terminal.
nal 3.
terminal 2.
terminal 2.
nal 3.
ground wire near the ignition spark high-voltage
cable or other line voltage wiring.
CB FALCON
Maximum
Leadwire
Distance (in
feet)
300
1000
750-265