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208VAC (3PH/60Hz)
L1
L2
L3
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 23.
Logic Diagram 208V 3 Phase up to 2500
3
R1
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
TB1-17
TB1-18
BLOWER MOTOR
TB1-19
TB1-20
TB1-21
TB1-22
TB1-23
TB1-24
120VAC TRANSFORMER
TB1-25
TB1-26
TB1-27
TB1-28
TB1-29
TB1-30
POWER SWITCH
TB1-31
TB1-32
POWER INDICATOR
TB1-33
HIGH VOLTAGE PANEL
TB1-34
ENCLOSURE FAN
TB1-35
LOW VOLTAGE PANEL
TB1-36
ENCLOSURE FAN
TB1-37
TB1-38
BLOWER CONTACTOR
TB1-39
TB1-40
TB 120VAC
TB 120VAC
TB1-41
TB1-42
TB1-43
TB1-44
24VAC TRANSFORMER
TB1-45
TB1-46
TB1-47
TB 24VAC
TB1-48
TB1-49
TB1-50
TB1-51
TB1-52
TB1-53
TB1-54
TB1-55
TB1-56
TB1-57
TB1-58
TB1-58
TB1-59
TB1-59
TB1-60
TB1-60
TB1-61
TB1-62
X1-1
X1-14
X1-2
SAFETY CHAIN
(24VDC)
FACTORY
X1-1
INSTALLED
X1-15
X1-3
X1-13
X1-1
DO NOT SCALE DRAWING.
THIRD ANGLE PROJECTION.
.1
FRACTIONS
1/8"
DIMENSIONS ARE IN INCHES.
.010
N/A
PROJECT #
REV.
A
1
POWER
Boiler (N)
OUTPUTS
Pump (L)
CHANG
DHW
Pump
System
Pump
Spare 1
DRY
Spare 1
CONTACTS
(OUTPUTS)
Spare 2
Spare 2
ALARM
BELL
System
Supply
System
Return
SENSOR
DHW
INPUTS
DHW
Outdoor
Outdoor
CH1/DHW1
CH1/DHW1
CH2/DHW2
HEAT
CH2/DHW2
DEMANDS
DHW/DHW3
DHW/DHW3
Spare 1
Spare 1
SPARE
INPUTS
Spare 2
Spare 2
BMS (-)
ANALOG
INPUT
0-10V (+)
Pump(-)
ANALOG
OUTPUT
0-10V(+)
Common
RUN RELAY
N.C.
DRY CONTACTS
N.O.
Common
ALARM RELAY
N.C.
DRY CONTACTS
N.O.
B
RS485
A
CASCADE
GND
B
RS485
RS485
A
BMS
BMS
GND
GND
Dual Element
1
2
Outlet
10k
3
4
Sensor
20k
Dual Element
1
2
Flue
10k
3
4
Sensor
20k
2
Inlet
Sensor
1
TITLE
APPROVALS
DRAFT
JM 7MAY18
ENGR
INTE
SH 7MAY18
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