CleaverBrooks CFC-1000 User Manual

CB FALCON
25 750-265
The Hydronic Central Heating function is implemented as
shown in Fig. 8.
Fig. 8. Central heating hydronic diagram.
The function of each parameter and feature is given below.
P-GAIN
I-GAIN
D-GAIN
PID
TOD
SETPOINT
SETPOINT
ON HYSTERESIS
OFF HYSTERESIS
OUTLET
CH BURNER
DEMAND
CH FIRING RATE
HYSTERESIS
TOD
HEADER
4-20 mA
STAT
ENVIRACOM REMOTE
STAT (ON/OFF
MESSAGE, WITH
TIMEOUT)
CH DEMAND SOURCE
TIME SINCE:
BURNER TURN-ON
BURNER TURN-OFF
BURNER
STATE: ON/OFF
SETTINGS ARE:
TOP: STAT AND SENSOR
REMOTE STAT AND SENSOR
LCI AND SENSOR
SENSOR ONLYBOTTOM:
CH PUMP
DEMAND
1
SETPOINT DEMAND
PARAMETER
“PRATE” = 0 TO 99.99% OF CAPACITY
INPUT
OUTPUT
TERMINALS
CH ENABLE
RESTART (RESTART
INTEGRATOR WHENEVER
A LIMIT OR OVERRIDE
ENDS, OR TURN-ON
OCCURS.)
LCI
CH SENSOR SELECT
INTLET
4-20 mA
CONVERSION
A
4-20 mA TO
SETPOINT
MINIMUM WATER
PRESSURE
PRESSURE SENSOR TYPE: 0-15 PSI OR 0-150 PSI
4-20 mA TO
PRATE
A
CH 4-20 mA REMOTE CONTROL
SETTINGS ARE:
DISABLE
SETPOINT
MODULATION
OUTDOOR
MAX OUTDOOR
MAX INDOOR
ODR SETPOINT
ODR ENABLE
SENSOR
SENSOR IS OK
Table 8. Central Heating Hydronic Parameters.
Parameter Comment
CH demand switch STAT, LCI, Sensor Only, EnviraCOM Remote STAT J7-3 120 Vac
The CH demand switch may be selected from four options. In all cases, for burner demand to
exist, the sensor must be generating a demand as determined by values.
• When “Sensor Only” is chosen, no other input is considered and pump demand is derived
from burner demand.
• When “STAT” is chosen, the STAT input (J8 Terminal 3) in the On condition creates pump
demand and it also must be on for burner demand to exist; if it is off there is no demand.
• When “LCI” is chosen, the LCI input (J6 Terminal 3) in the On condition creates pump
demand and it also must be on for burner demand to exist; if it is off there is no demand.
CH sensor Outlet, Inlet
The sensor used for modulation and demand may be the Outlet sensor, the 4-20 mA Header
or inlet sensor.
CH setpoint Degrees or None
This setpoint is used when the time-of-day input is off. If the ODR function is inactive, the
setpoint is used as-is.
If the ODR function is active (input on J10-2), this setpoint provides one coordinate for the
outdoor reset curve, as described in “Outdoor Reset and Boost” on page 26.

CleaverBrooks CFC-1000 Specifications

General

Brand	CleaverBrooks
Model	CFC-1000
Category	Boiler
Language	English