Diagrams - Lochinvar Crest FBN 2500 Supplemental Manual

3

Diagrams

Figure 3-1 Wiring Diagram_2.5 - 3.5 Models
MODBUS
OPTION
RATE
BOILER
PUMP OUT
SYSTEM RETURN
SENSOR
SYSTEM SUPPLY
SENSOR
SENSOR
OUTDOOR
SENSOR
SYSTEM
PUMP IN
CASCADE
LG CON BRD
BAS
CN6-2 R
CN6-1 PR
CN6-3 GY
CONTACTS
RUN-TIME
CONTACTS
THERMOSTAT
ENABLE
LOUVER
PROVING
24 VAC LOUVER
RELAY COIL
SWITCH 1
SWITCH 2
LARGE CONNECTION BOARD
17 CN6-3 G Y
SHIELD
18 CN6-2
A R
B 19 CN6-1 P R
SHIELD 20
+ 21
0-10V
OUT
- 22
CN3-4
+ 23
0-10V CN3-6
- 24
CN3-7
25
CN3-14
26
CN3-13
27
CN3-12
28
CN3-11
29
TANK
CN3-10
30
CN3-9
31
CN3-8
32
CN3-1
+ 33
BMS
0-10V CN3-2
IN -
34
CN3-3
+ 35
0-10V CN3-5
- 36
37
SHIELD
38
A
INLET SENSOR
39
B
SHIELD 40
OUTLET SENSOR (S9)
OUTLET SENSOR (S1)
FLUE SENSOR
LCD
DISPLAY
FLUE SENSOR (S10)
WIFI
DONGLE
PRE-MIX SENSOR 1 (S11)
COMMUNICATION
CONTROL BOARD
8 43
USB CABLE
J6 J7 SW1 PRE-MIX SENSOR 1 (S13)
J8
J10
J9
J17
OPTIONAL USB/WIFI PRE-MIX SENSOR 2 (S12)
J2 J11
J23 EXTENSION CABLE
J12
OPTIONAL
PRE-MIX SENSOR 2 (S14)
E ETHERNET CABLE
GND
24V
SMALL CONNECTION BOARD
1
ALARM
2
3 CN1-4
4
CN1-5
5
TANK CN1-6
6
CN1-12
R
7 CN1-10
W 8 CN1-11
9 CN1-9
10 CN1-8
11
CN1-7
12
CN1-1
HIGH LIMIT
13
AUX CN1-2
SWITCH
14 CN1-3 R
15
AUX
16
LWCO
BOARD
J3-6
J3-5
LWCO TEST
J3-4
PROBE SWITCH
O R B / K J3-3
O R B / K
J3-2
LWCO RESET
O R J2-1
O R J2-2
CAM PROPANE LGPS
GPS2
SWITCH
OR
NATURAL LGPS
O R
BLOWER PROVING SWITCH (LARGE)
T
BLOWER PROVING SWITCH (SMALL)
P R
BLOCKED FLUE SWITCH
B K
BLOCKED DRAIN SWITCH
CAM SWITCH
CAM
SWITCH
PROPANE LIGHT
NATURAL LIGHT
BLOCK WIRING
IS MODEL
DEPENDENT
Notes:
1. All wiring must be installed in accordance with: local, state, provincial and national code requirements per either N.E.C. in USA or C.S.A. in Canada.
2. If any original equipment wire as supplied with the appliance must be replaced, it must be replaced with wire having same wire gauge (AWG) and rated for a
minimum of 105° C. Exceptions: Replacement high vo ltage spark lead and ribbon cables must be purchased from the factory. Use of a non-approved spark lead
or ribbon cables can lead to operational problems which could result in non-repairable damage to the integrated controller or other components.
3. Actual connector block locations may vary from those shown on diagrams. Refer to actual components for proper connector block locations when using
diagrams to troubleshoot unit.
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
BAS
X1-1
X1-2
X1-3
X6-3
INTEGRATED CONTROL
X6-1
X6-2
X4-1 B K X8-20
T
X4-2 X8-10
X4-3
B L X7-8
R X7-7
X8-13
B L
R X8-14
B R
X8-12
W X8-11
O R X8-5
O / R W X8-15
P X8-6
X8-16
W
B L
X8-7
B K X8-17
Y B / K X8-18
X8-1
-T
B L
X8-3
-T
/ R W X8-8
-T
R X8-2
X1-6
X1-3
-T
X1-12
W X8-4
X10-1
X10-4
-T
G Y X8-9
X1-1
X1-2
-T X1-4
G Y
X7-1
X10-2
-T
B R X7-5
X10-5
-T
B K
X7-2
X10-3
-T
T X7-6
X10-6
X6-18 R
X6-8 B K
X1-8 G Y
X4
BLOWER
B L
Y
R X3-3
R X3-4
X6-9
W
O R X3-1
X6-17 T
O R X3-2
B L X6-1
X2-4 T
B K X6-11
B R X6-2
R
X6-14
BLOWER
Y X6-10
O R X6-13
B L
X6-4
R
X13-2 W
X13-3
X2-3 R
X1-7 R
X1-10 R
O R X6-3
X1-5 P
FLUE DAMPER
TRANSFORMER
X2-5 B K
GPS3
X6-5
OR BR
X6-15 X13-4
X6-12
X13-1
X6-6
X5-1
X5-7
X5-2
X11
X5-8
X5-3 USB
INTERFACE
X5-9
"X5"
X5-4
X5-10
X5-5
X5-41
X5-6
X5-12
Dual Fuel Supplemental Manual
WARNING
!
DISCONNECT POWER
BEFORE SERVICING
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
1.5A EACH MAX
SYSTEM PUMP
CONTACTOR
120V
SUPPLY BOILER PUMP
CONTACTOR
GND
DHW PUMP
L N
CONTACTOR
JUNCTION
BOX
BK
ON/OFF
SWITCH
B K
W
G
P R
T
O R
OR/BK
O R OR/W
CAM
SWITCH
B L
SMALL SMALL
NATURAL PROPANE
VALVE VALVE
R/BK
R
R/W
CAM
SWITCH
B L
LARGE
LARGE
PROPANE
NATURAL
VALVE
VALVE
B K
SMALL
1 3 2
RELAY
BLOWER
(SMALL)
1 2 3 4 5
B / K W G / W
LARGE
1 2 3
R/W
RELAY
BLOWER
(LARGE)
1 2 3 4 5
BK/W
B / K
T
FLAME SENSE 2
SPARK
SPARK ROD
GENERATOR
FLAME SENSE 1
FLUE DAMPER GND
B L
1
M
Y 2
O R
3
24V
TRANSFORMER
BL
Y
100267551 REV A
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