Mod Con MODCON500, Installation Manual

Page: 36 / 68

LP-446-r4 Rev. 10.12.16
36
WIRING CONNECTION DIAGRAM
500, 700, and 850 MODELS
POWER
SWITCH
SUPPLY
RETURN
X4-13
X8-1
X4-12
X8-2
X4-7
X4-17
MAN RESET
HIGH WATER
TEMP
AUTO RESET
HIGH WATER
TEMP
HIGH GAS
PRESSURE
X8-5
X8-7
X4-4
X4-18
X4-20
LOW WATER
LEVEL
CONDENSATE
FULL
LOW GAS
PRESSURE
OUTDOOR
**** DHW TANK
10
11
12
13
14
15
0-10 VOLT
+
-
FLUE
ECO
X4-5
X4-6
X4-16
X4-15
16
17
TT TERMINALS
J3-3
J3-4
J3-5
J4-3
J4-4
RS485 BUS
RS485 BUS
X4-8
X4-9
MOTOR
BLOWER
24VAC <12VA
GAS VALVE
X5-4
X5-3
RELAY
X4-9
X4-8
DETAIL "A"
BLOWER
MOTOR
X-2
RIBBON CABLE
ORANGE
SPARK CABLE TO SPARK ELECTRODE
TEXT DISPLAY
X4-11
120 VAC
LINE
F1
CR1
J4-4
CONDENSATE
RECEPTICAL
FLOW SWITCH
FLOW SWITCH FOR VWH APPLICATION ( OPTIONAL FOR STANDARD BOILER APPLICATION )
LOW WATER LEVEL APPLICATION FOR STANDARD BOILER ONLY ( NOT FOR VWH )
*
*
*
**
*
X6-5
FLAME RECTIFICATION
PROBE
BVPS FUSE
THERMAL
X5-4
926
CONTROL
X4-5
X4-6
X4-16
X4-15
X5-3
X8-10
X8-4
X4-19
X8-9
VALVE
FLAPPER
J5-6
J5-7 X4-1
J5-9
J5-8
X8-6
J5-10 X8-3
X4-10 J5-3
J5-4 X8-8
J5-2
X4-2
X4-14
J5-1
J6-4 X5-7
X5-8 J6-6
J6-5 X5-5
F2
4
5
2
NEUT
GND
F3
120V J7-1
J7-3
J6-1
X6-1
J8-3
J8-4
J8-1
G H
6
1
3
DHW
PUMP
BOILER
PUMP
N
8
7
9
CR1
CR1
ALARM
***
***
MAX 3 AMPS/120 VAC. USE CONTACTOR IN PLACE OF PUMP FOR GREATER DRAW.
***
120V
GAS VALVE
X4-3 J5-5
J6-3
X6-4
J6-2
X6-2
B A
JUMPER IN 'B' POSITION
FOR ALL MODCON UNITS
TEMP LIMIT
SWITCH
OPTIONAL
UL353
LWCO
FOR DOUBLE STACK UNITS - SUPPLY MANIFOLD SYSTEM SENSOR BOTTOM BOILER
****
REAR FRONT
SEE DETAIL "A" FOR 120V GAS
VALVE WIRING APPLICATION
Figure 30 - Internal Connection Diagram