AERCO BMK 2.0 LN Natural Gas (SN G-11-1861 and above) - Manual (Page 157)

GF-123
Benchmark 2.0LN Low NOx Boiler
Appendix H I
OMM-46_0E Installation, Operation and Maintenance Manual Wiring Schematics
PR2: 08/20/12
AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288
Page 157 of 170
ENCLOSURE
TO CONTROL BOX
SOLENOID
6 PIN CONNECTOR
195
194
193
192
191
190
210
208
209
202
203
206
204
201
AUTO RESET
OVER TEMPERATURE SWITCHES
MANUAL RESET
137 209 136
350
OVERLOAD
RELAY WITH
A2
MCR
POWER BOX
206
{
320
321
L1 261
366
GND BLOCK
142
261
L1
L2
N
60 HZ
120 VAC
263
200
203
GND 260
A1
263
210 120 VAC
T1 T1
T2 T2
331
T3 T3
95/NC
205
208
207
209 XFMR
24 VAC
205
204
202
201
FUSE
FUSE
200
190 138 135 136 193 141
BLOWER PROOF SW
.
142
154
WATER LEVEL PROBE IGNITOR
351 321
FLAME ROD
GND
352
137 191 194 155 154
TRANSFORMER
IGNITION
141
192 140 195
19-PIN CONNECTOR
13 16 17 19 18 15 14 12 1110 9 8 7 6 5 4 3 2 1 16 15
134 133 162 166 168 172 170
3
STEPPING
AIR/FUEL VALVE
SWITCH POSITION IGNITION SWITCH POSITION PURGE
C
53
MOTOR 5
K
B
A
BLK WHT
YEL
BLU GRN RED
2 10K
1
167
173 171 169 163
165 161
SHELL
SENSOR
TEMP.
CONTROL BOX CONNECTORS
16-PIN CONNECTOR
13 14 12 11 10 9 8 7 6 5 4 3 2 1
164
7 6 5 4 3 2 1
7-PIN CONNECTOR
BLOCKED AIR INLET SW
.
152 150 148 146
C
N
148
CLOSURE SWITCH
PROOF OF
LOW GAS PRESS
. SW
.
HIGH GAS PRESS
. SW
.
152 150
H
153 151
NC
1K
149
153 151 149
SAFETY
SHUTOFF VALVE
145
146
147
G
147 145
4
9-PIN CONNECTOR
7 8 9 5 6 1 2 3
332
BLOWER
MOTOR
104
103
A1 B1 A2 B2 C1 C2
DRIVE
REACTOR
332
331
GND
375
TO I/O BOX
0-10V
AGND
104
103
120 VAC, 60 HZ
WIRING SCHEMATIC, BMK 2.0 LN CP
REF: 68023 REV. C (SHT. 1 OF 2)
SENSOR
TEMP.
AIR
363
364
TO I/O BOX
AIR TEMP
SENSOR