Page 52
LAARS Heating Systems
7. H Ladder Diagrams (continued)
Figure 26. Ladder Diagram 600V 3 Phase 3000
LOW VOLTAGE PANEL
ENCLOSURE FAN
ENCLOSURE FAN
HIGH VOLTAGE PANEL
TB1-54
N.O.
TB1-59
TB1-59
A
TB1-60
TB1-60
TB1-62
TB1-61
GND
GND
TB1-56
TB1-55
TB1-58
TB1-57
TB1-58
GND
B
B
A
BMS
BMS
ALARM
BELL
CASCADE
RS485
RS485
RS485
DRY CONTACTS
DRY CONTACTS
ALARM RELAY
TB1-33
Outdoor
BMS (-)
0-10V (+)
Common
Common
Pump(-)
0-10V(+)
Spare 2
TB1-50
TB1-49
TB1-52
TB1-51
TB1-53
N.C.
N.C.
N.O.
TB1-44
TB1-46
TB1-45
TB1-48
TB1-47
RUN RELAY
OUTPUT
ANALOG
ANALOG
INPUT
Outdoor
TT-2
TT-2
Spare 1
Spare 1
Spare 2
TB1-38
TB1-40
TB1-39
TB1-42
TB1-41
TB1-43
DHW
DHW
TB1-34
TB1-36
TB1-35
TB1-37
TT-1
TT-1
DEMANDS
HEAT
SPARE
INPUTS
DRY
Spare 1
Spare 2
Spare 2
Supply
System
Return
System
Spare 1
TB1-28
TB1-29
TB1-30
TB1-32
TB1-31
DHW
DHW
TB1-23
TB1-24
TB1-25
TB1-26
TB1-27
CONTACTS
SENSOR
INPUTS
(OUTPUTS)
Boiler (N)
Pump (L)
Pump
Pump
System
TB1-17
TB1-21
TB1-22
TB1-18
TB1-19
TB1-20
DHW
POWER
OUTPUTS
BOILER/HEATER
CONTROLLER
GAS VALVE
CONTROLLER
BOILER/HEATER
SPARE
TT-2
TT-2
TB1-38
TB1-40
TB1-39
DHW
DHW
TB1-36
TB1-35
TB1-37
TT-1
TT-1
(24VDC)
HEAT DEMANDS
(OPTIONAL)
ARHL
(OPTIONAL)
(OPTIONAL)
LWCO
X4-19
RELAY INTERLOCK
GAS VALVE
480VAC (3PH/60Hz)
CB
X1-15
X1-13
X1-3
X1-2
X1-14
X1-1
X1-1
Inlet
Sensor
Flue
Sensor
20k
10k
Dual Element
20k
X1-1
10k
INSTALLED
FACTORY
Dual Element
Sensor
Outlet
1
2
1
2
3
4
4
3
2
1
575/600VAC (3PH/60Hz)
BLOWER MOTOR
ROD
FLAME
X15-4
X9-3
MAIN VALVE
TB1-7
SPARK
IGNITOR
X12-4
GENERATOR
SPARK
X12-3
(NOT INCLUDED)
(24VDC)
SAFETY CHAIN
24VAC TRANSFORMER
X4-9
X4-18
CONDENSATE
X4-8
X4-17
X4-7
X4-16
LOW GAS PRESSURE
X4-15
X4-6
HIGH GAS PRESSURE
MRHL
X4-14
X4-5
X4-4
X4-13
X4-3
X4-12
LWCO
X4-2
X4-11
FLOW
X4-1
DHW PUMP
DRY CONTACT
X14-3
TB1-19
X14-10
TB1-20
DRY CONTACT
SYSTEM PUMP
X14-11
TB1-22
X14-4
TB1-21
BOILER PUMP
P1
TB1-17
X14-1
X14-8
TB1-18
120L
120N
TB 120VAC
TB 24VAC
24N
24V
120VAC TRANSFORMER
CB
BLOWER CONTACTOR
POWER SWITCH
POWER INDICATOR
R1
CB
A
ON
OFF
CB
M1
L1
L3
L2
R1
INTENDED SIZE:
SCALE: NONE
0060
PROJECT #
D
C
B
A
B
C
D
1
2
3
4
RR 3/8/19
B
SHEET 1 OF 1
REV.
APPROVALS
2
4
SOFTWARE
3
BY LAARS HEATING SYSTEMS CO.
DG 3/8/19
17-152N-03
A
UPDATED TO ADD FAN TO CONTROL PANEL
CHECK
DRAFT
ECN
1
REVISIONS
APPR
ENGR APPR
CHANGE:
DWG. NO:
.010
E23846
SH 3/8/19
A
DECIMALS .XX
LOGIC DIAGRAM, 600V 3 PHASE,
N/A
FINISH
1/8"
TITLE:
MATERIAL:
PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING
OMT 3.0
DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY OTHER
TOLERANCES ARE:
REV.
REPRODUCED, TRANSFERRED TO OTHER DOCUMENTS, USED OR
DECIMALS .XXX
1
.1
SH 7MAY18
S
JM 7MAY18
FRACTIONS
.03
DECIMALS .X
DIMENSIONS ARE IN INCHES.
UNLESS OTHERWISE SPECIFIED:
APPR
ENGR
DRAFT
THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN ARE
PROPRIETARY TO LAARS HEATING SYSTEMS CO.AND SHALL NOT BE
ANGLES
DO NOT SCALE DRAWING.
THIRD ANGLE PROJECTION.
N/A
NOTES:
1. FOR SOURCE FILE, REFERENCE SOLIDWORKS ELECTRICAL PROJECT 34,
DRAWING NUMBER E23846.
