AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 147)

PR2: 05/01/11 Page 147 of 162
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
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
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 11 10 9 8 7 6 5 4 3 2 1 16 15
152 150 148 146 134 133 162 166 168 172 170
C
N
148
3
STEPPING
AIR/FUEL VALVE
SWITCH POSITION IGNITION SWITCH POSITION PURGE
C
53
MOTOR
5K B
A
BLK WHT
YEL
BLU GRN RED
2 10K
1
CLOSURE SWITCH
PROOF OF
GAS PRESS
. SW
.
GAS PRESS
. SW
.
407 150
H
152 405
NC
1K
401
167
173 171 169 163
165 161 153 151 149
403
146
147
G
SHELL
SENSOR
TEMP.
147 145
4
9-PIN CONNECTOR
CONTROL BOX CONNECTORS
16-PIN CONNECTOR
13 14 12 11 10 9 8 7 6 5 4 3 2 1
164
7 8 9 5 6 1 2 3 7 6 5 4 3 2 1
7-PIN CONNECTOR
PROOF OF
CLOSURE SWITCH
PROPANE SSOV
N
C NC
H
1K
G
401
NAT
. GAS SSOV
402
402
400
145
403
404
404
3 POSITION FUEL
SELECTOR SWITCH
405
PROPANE HIGH GAS PRESS
. SW
.
151
405
151
405
405
153
408
407
GAS PRESS
. SW
.
408
152
NAT
. GAS LOW
PROPANE LOW
408
NAT
. GAS HIGH
408
407
PROPANE
OFF
NAT. GAS
X00
00X
X00
00X 00X
BLOCKED AIR INLET SW
.
332
331
BLOWER
A1 B1 A2 B2 C1 C2
DRIVE
REACTOR
332
331
GND
375
SENSOR
TEMP.
AIR
363
364 TO I/O BOX
AIR TEMP
SENSOR
104
103
TO I/O BOX
0-10V
AGND 104
103
450
WIRING SCHEMATIC,
BMK 1.5 LN & 2.0 LN CP
DUAL FUEL 120 VAC
REF: 68017 REV. E (SHT. 1 OF 2)