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Page 60
7.I
Ladder Diagrams (continued)
600 (3PH/60Hz)
L1
L2 L3
CB
CB
CB
TB1-120L
CB
TB1-24V
TB1-120L
X10-1
CONTROLLER
POWER
TB1-120N
X10-3
TB1-43
X2-1
TT-1
TB1-44
X2-8
TB1-45
X2-1
HEAT
TT-2
DEMANDS
X2-8
TB1-46
TB1-47
X2-1
DHW
TB1-48
X2-8
X4-1
X4-11
LWCO
X4-2
X4-12
MANUAL RESET
HIGH LIMIT
X4-3
X4-13
TB1-44
X4-4
TB1-43
X4-14
HIGH GAS
PRESSURE
X4-5
SAFETY CHAIN
(24VDC)
(24VDC)
X4-15
LOW GAS
PRESSURE
X4-6
X4-16
AUTO RESET
HIGH LIMIT
X4-7
X4-17
CONDENSATE
X4-8
X4-18
X4-9
X4-19
Ladder Diagram, Models 2000, 3000. 600V, Three Phase
Figure 31.
1
CB
120VAC
OFF
ON
120VAC
24VAC
BOILER INTEGRATED CONTROLLER (BIC)
R2
1 2 4 5
CONVENIENCE
OUTLET
A
TB1-120N
R2
TB1-24N
X14-8
TB1-24
120VAC
FROM BIC
X14-1
TB1-23
X14-4
TB1-29
X14-11
TB1-30
TB1-27
X14-3
X14-10
TB1-28
Dual Element
X1-1
1
10k
3
X1-14
20k
X1-2
Dual Element
X1-1
1
10k
3
X1-15
20k
X1-3
X1-13
X1-1
LOGIC DIAGRAM
CFT 2.0, 3.0 600V 3PH
DWG# E23969 REV -
LABEL# H24058
DOCUMENT# H24059
LAARS Heating Systems
2
PWM SIGNAL
BLOWER
120VAC TRANSFORMER
POWER SWITCH
TERMINAL STRIP 120VAC
VFD CONTACTOR
24VAC TRANSFORMER
TERMINAL STRIP 24VAC
BOILER PUMP
(NOT INCLUDED)
P
SYSTEM PUMP
DRY CONTACT
DHW PUMP
DRY CONTACT
2
Outlet
4
Sensor
FACTORY
INSTALLED
2
Flue
4
Sensor
2
Inlet
Sensor
1
1
PRESSURE
2
TRANSMITTER - 1
3
1
PRESSURE
2
TRANSMITTER - 2
3
TB1-120L
TB1-120N
TB1-GND
12VDC
POWER SUPPLY
TB1-120L
L
V+
TB1-120N
N
V-
TB1-GND
G
O2 SENSOR
X22-11
X22-12
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