Lochinvar CREST 102 Series - Diagrams

12
Dual Fuel Supplemental Manual
3 Diagrams
Figure 3-1 Ladder Diagram_751 - 2001 Models
FLUE SENSOR
FLUE SENSOR (S10)
OUTLET SENSOR (S1)
OUTLET SENSOR (S9)
JUNCTION BOX
TERMINAL STRIP
TERMINAL STRIP
120VAC
NEUTRAL
INTEGRATED CONTROL
ON/OFF
SWITCH
F2
3.15 A
5.0 A
BOILER PUMP
DHW PUMP
SMALL GAS
LARGE GAS
SMALL GAS
LARGE GAS
TERMINAL STRIP
CONTACTOR
BOLIER PUMP
CONTACTOR
DHW PUMP
CONTACTOR
BLOWER
BLOWER
12
3
BAS
FLUE DAMPER
TRANSFORMER
12
3
TRANSFORMER
FLUE DAMPER
LWCO
BOARD
TEST
SWITCH
LWCO
PROBE
LWCO RESET
INTEGRATED
CONTROL
BLOCKED FLUE
SWITCH
BLOCKED DRAIN
SWITCH
ALARM
CONTACTS
CONTACTS
TANK
THERMOSTAT
LOUVER
PROVING
AUX
SWITCH 1
AUX
SWITCH 2
ENABLE
R
W
FLAME
SENSE 2
FLAME
SENSE 1
SPARK
GENERATOR
SPARK
ROD
SHIELD
SHIELD
A
B
MODBUS
OPTION
RATE
OUT
BOILER
PUMP OUT
SENSOR
SENSOR
TANK
SENSOR
OUTDOOR
SENSOR
BMS
IN
PUMP IN
SHIELD
SHIELD
A
B
CASCADE
LARGE
CONNECTION BOARD
BAS
BOARD
INTEGRATED
CONTROL
GROUND
X11
LCD
DISPLAY
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
Notes
C.S.A. in Canada.
locations when using diagrams to troubleshoot unit.
USB
INTERFACE
"X5"
BLOCK WIRING
IS MODEL
DEPENDENT
BLOWER
HIGH LIMIT
SWITCH
SMALL
CONNECTION BOARD
19
20
21
22
23
25
26
29
30
31
32
33
35
36
39
1
2
3
5
6
9
10
11
12
13
15
16
CAM
SWITCH
PROPANE LGPS
NATURAL LGPS
AIR VALVE
PRESS. SWITCH
CAM
SWITCH
PROPANE LIGHT
NATURAL LIGHT
CAM
SWITCH
PROPANE
NATURAL
PROPANE
NATURAL
M
WARNING
!
OPTIONAL USB/WIFI
EXTENSION CABLE
OPTIONAL
ETHERNET CABLE
USB CABLE
E
GND
BAS
WIFI
DONGLE
AIR VALVE
M
LG CON BRD
1
2
5
BLOWER
INLET SENSOR
DISCONNECT POWER
BEFORE SERVICING
100267386 REV B
SHIELDED CABLE FROM X4
TO J12 OR J23 AS APPLICABLE
1.5A EACH MAX