Outdoor Crest Supplemental Manual
4
Diagrams
Figure 4-3
Ladder Diagram_2501 - 3501 Models
22
JUNCTION BOX
TERMINAL STRIP
208V 3 SUPPLY
TERMINAL STRIP
208V SUPPLY "N"
NEUTRAL
INTEGRATED CONTROL
ON/OFF
SWITCH
F2
3.15 A
F4
5.0 A
SYSTEM PUMP
RELAY
BOILER PUMP
RELAY
DHW PUMP
RELAY
X1-1
X1-2
X1-4
X1-8
CONTACTOR
SMALL GAS
VALVE RELAY
LARGE GAS
VALVE RELAY
X1-4
X10-1
X10-2
X10-3
SMALL GAS
VALVE RELAY
LARGE GAS
VALVE RELAY
X10-6
X10-5
X10-4
GAS
VALVE
(LARGE)
GAS
VALVE
(SMALL)
TERMINAL STRIP
SYSTEM PUMP
CONTACTOR
BOILER PUMP
CONTACTOR
DHW PUMP
CONTACTOR
BLOWER
CONTACTOR
BLOWER
X6-10
X13-4
X6-1
X2-5
FLUE DAMPER
TRANSFORMER
M
1
2
3
24V
TRANSFORMER
FLUE DAMPER
X6-3
X1-12
X1-3
LWCO
BOARD
TEST
SWITCH
LWCO
PROBE
LWCO RESET
J3-6
J3-3
J2-1
J2-2
J3-5
J3-2
J3-4
OPTIONAL
ETHERNET CABLE
X1-3
X1-7
X1-10
X2-5
FLAME
SENSE 1
FLAME
SENSE 2
SPARK
GENERATOR
SPARK
ROD
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
SHIELD
SHIELD
A
B
BAS
OPTION
+
-
-
+
RATE
OUT
BOILER
PUMP OUT
SYSTEM RETURN
SENSOR
SYSTEM SUPPLY
SENSOR
0-10V
0-10V
TANK
SENSOR
OUTDOOR
SENSOR
+
+
-
-
0-10V
0-10V
BMS
IN
SYSTEM
PUMP IN
SHIELD
SHIELD
A
B
CASCADE
LARGE
CONNECTION BOARD
CN6-1
CN3-6
CN3-7
CN3-14
CN3-13
CN3-11
CN3-9
CN3-8
CN3-1
CN3-2
CN3-3
CN3-4
CN6-2
CN6-3
CN3-10
CN3-12
BAS
BOARD
(AS APPLICABLE)
X4
-1
X4
-2
X4
-3
X6
-3
X6
-1
X6
-2
X8-20
X8-10
X7-8
X8-13
X8-14
X8-12
INTEGRATED
CONTROL
X8-5
X8-15
X7-7
X8-11
X8-6
X8-16
X8-7
X8-17
X8-18
-T
-T
-T
-T
-T
-T
-T
INLET SENSOR
OUTLET SENSOR (S9)
OUTLET SENSOR (S1)
FLUE SENSOR
FLUE SENSOR (S10)
PRE-MIX SENSOR 1 (S11)
PRE-MIX SENSOR 1 (S13)
X8-3
X8-8
X8-2
X8-4
X8-9
X7-1
X7-5
GROUND
X6-18
X6-9
X6-17
X6-8
1
4
2
5
BLOWER
E
GND
1.5A EACH MAX
X11
WIFI
DONGLE
X4
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
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 voltage spark lead and shielded cables
must be purchased from the factory. Use of a non-approved spark lead or shielded 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.
USB
INTERFACE
L1 L2 L3
1
2
3
4
LADDER DIAGRAM
100303181 REV B
X8-10
X8-1
CN3-4
SW1
J2
8
43
J6
J9
J17
J23
J12
J11
LG CON BRD
J8
LCD
DISPLAY
USB CABLE
OPTIONAL USB/WIFI
EXTENSION CABLE
J10
J7
BAS
CN6-1
CN6-3
24V
CN6-2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
ALARM
CONTACTS
RUN-TIME
CONTACTS
TANK
THERMOSTAT
LOUVER
PROVING
24 VAC LOUVER
RELAY COIL
AUX
SWITCH 1
AUX
SWITCH 2
ENABLE
R
W
CN1-4
CN1-5
CN1-6
CN1-12
CN1-10
CN1-11
CN1-9
CN1-8
CN1-7
CN1-2
CN1-3
HIGH LIMIT
SWITCH
SMALL
CONNECTION BOARD
X13-1
X6-6
X3-3
X3-4
X3-1
X3-2
X6-11
X6-2
X6-14
INTEGRATED
CONTROL
BLOCKED FLUE
SWITCH
BLOCKED DRAIN
SWITCH
X6-4
X5-1
X5-7
X5-2
X5-8
X5-3
X5-9
X5-4
X5-10
X5-5
X5-41
X5-6
X5-12
"X5"
BLOCK WIRING
IS MODEL
DEPENDANT
CN1-1
X6-5
X6-15
X6-12
GPS1
GPS2
PRESS. SWITCH
AIR VALVE
X6-13
AIR VALVE
CN-1
CN-4
CN-2
CN-3
M
SERVICE
OUTLET
BAS
(AS APPLICABLE)
X1-1
X1-2
X1-3
SHIELDED CABLE FROM X4
TO J12 OR J23 AS APPLICABLE
O
