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Page 52
480/575/600VAC (3PH/60Hz)
L1
L2
L3
CB
220VAC (1PH/60Hz)
CB
120L
120L
CB
24V
TB1-35
TT-1
TB1-36
TT-1
X14-8
TB1-18
TB1-21
X14-4
TB1-19
X14-3
FLOW
X4-1
X4-11
GAS VALVE
RELAY INTERLOCK
X4-4
X4-14
ARHL
(OPTIONAL)
X4-7
X4-17
SPARK
X12-3
X12-4
GENERATOR
SPARK
IGNITOR
Figure 25.
Logic Diagram 480, 600V 3 Phase 2500
3
R1
OFF
ON
BOILER/HEATER
CONTROLLER
GAS VALVE
LWCO
BOILER/HEATER
CONTROLLER
TB1-37
TT-2
TB1-39
TB1-38
TT-2
TB1-40
P1
X14-1
X14-11
X14-10
LWCO
X4-2
X4-12
HIGH GAS PRESSURE
X4-5
X4-15
CONDENSATE
(OPTIONAL)
X4-8
X4-18
MAIN VALVE
X9-3
TB1-7
FLAME
X15-4
ROD
M1
CB
A
R1
120N
120N
24N
DHW
HEAT DEMANDS
(24VDC)
DHW
BOILER PUMP
TB1-17
(NOT INCLUDED)
SYSTEM PUMP
TB1-22
DRY CONTACT
DHW PUMP
TB1-20
DRY CONTACT
MRHL
(OPTIONAL)
X4-3
X4-13
LOW GAS PRESSURE
X4-6
X4-16
SPARE
X4-9
X4-19
UNLESS OTHERWISE SPECIFIED:
TOLERANCES ARE:
DECIMALS .X
DECIMALS .XX .03
DECIMALS .XXX
ANGLES
1
MATERIAL:
FINISH
LAARS Heating Systems
2
BLOWER MOTOR
120VAC TRANSFORMER
POWER SWITCH
POWER INDICATOR
HIGH VOLTAGE PANEL
ENCLOSURE FAN
LOW VOLTAGE PANEL
ENCLOSURE FAN
BLOWER CONTACTOR
TB 120VAC
TB 120VAC
24VAC TRANSFORMER
TB 24VAC
SAFETY CHAIN
(24VDC)
FACTORY
INSTALLED
DO NOT SCALE DRAWING.
THIRD ANGLE PROJECTION.
.1
FRACTIONS
1/8"
DIMENSIONS ARE IN INCHES.
.010
N/A
PROJECT #
N/A
0060
REV.
A
TB1-17
Boiler (N)
POWER
CHAN
OUTPUTS
Pump (L)
TB1-18
TB1-19
DHW
TB1-20
Pump
TB1-21
System
TB1-22
Pump
TB1-23
Spare 1
DRY
TB1-24
CONTACTS
Spare 1
(OUTPUTS)
TB1-25
Spare 2
Spare 2
TB1-26
TB1-27
ALARM
TB1-28
BELL
TB1-29
System
TB1-30
Supply
TB1-31
System
TB1-32
Return
SENSOR
TB1-33
DHW
INPUTS
TB1-34
DHW
TB1-35
Outdoor
TB1-36
Outdoor
TB1-37
CH1/DHW1
TB1-38
CH1/DHW1
TB1-39
CH2/DHW2
HEAT
CH2/DHW2
TB1-40
DEMANDS
DHW/DHW3
TB1-41
TB1-42
DHW/DHW3
Spare 1
TB1-43
Spare 1
SPARE
TB1-44
INPUTS
TB1-45
Spare 2
TB1-46
Spare 2
TB1-47
BMS (-)
ANALOG
INPUT
TB1-48
0-10V (+)
TB1-49
Pump(-)
ANALOG
OUTPUT
TB1-50
0-10V(+)
TB1-51
Common
RUN RELAY
TB1-52
N.C.
DRY CONTACTS
TB1-53
N.O.
TB1-54
Common
ALARM RELAY
TB1-55
N.C.
DRY CONTACTS
TB1-56
N.O.
B
TB1-57
RS485
TB1-58
TB1-58
A
CASCADE
TB1-59
TB1-59
GND
B
TB1-60
TB1-60
RS485
RS485
TB1-61
A
BMS
BMS
TB1-62
GND
GND
Dual Element
X1-1
1
2
Outlet
10k
3
4
Sensor
X1-14
20k
X1-2
Dual Element
X1-1
1
2
Flue
10k
3
4
Sensor
X1-15
20k
X1-3
X1-13
2
Inlet
Sensor
1
X1-1
APPROVALS
DRAFT
DG 4/3/18
ENGR
SH 4/3/18
APPR
TI
IN
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