Wiring Guide
LABEL, WIRING DIAGRAM
WH
LBL20169
Dwg No.
Model
Title
Material
Blank
MV 11/5/10
JH 11/5/10
11/5/10
Drawn by:
Date:
Checked By:
Approved By:
Date:
BP
Date:
1
2
3 4
5
6 7
8
A
C
D
B
SHEET 1 OF 1
C O N F I D E N T I A L
THIS DRAWING IS THE PROPERTY OF LOCHINVAR CORPORATION
AND CAN NOT BE ALTERED, REPRODUCED OR DISTRIBUTED
WITHOUT WRITTEN PERMISSION
A
C
D
B
1
2
3 4
5
6 7
8
Lochinvar Corporation
300 Maddox Simpson Parkway
Lebanon, TN 37090
TEL 615-889-8900 FAX 615-547-1000
www.lochinvar.com
HIGH EFFICIENCY WATER HEATERS AND BOILERS
®
REV
SIZE
B
C
THIRD ANGLE
PROJECTION
NOT TO SCALE
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
FINISH IN MICROINCHES
DECIMAL
.X
u
.125
.XX
u
.060
.XXX
u
.031
ANGULAR
u
1
v
FINISH:
DEBURR AND BREAK
ALL SHARP EDGES .005 MAX
DO NOT SCALE THIS DRAWING
63
REV DESCRIPTION ECO DATE APR
A INITIAL RELEASE C06746 11/5/10 BP
B CORRECT LABEL P/N, ADD REV B C06762 11/9/10 RW
C REVISE PER LOW VOLTAGE BOARD,
REMOVE BLOCKED DRAIN
C08914 10/17/11 ERC
NOTES
1. MATERIAL: WHITE PAPER WITH LAMINATION AND
PRESSURE SENSITIVE ADHESIVE, 9 1/4" H X 7" W.
2. PRINTING: BLACK.
X1-7
ON/OFF
SWITCH
1 2 3 4 5
G
R
RW
R
T
W
BK
Y
BL
BLOWER
-T
HIGH LIMIT SENSOR S1b
OPERATING SENSOR S1a
INLET SENSOR S2
FLUE SENSOR S3a
FLUE SENSOR S3b
INTEGRATED
CONTROL
BK
Y
GAS VALVE
@24VAC
SPARK
ROD
TRANSFORMER
TR2
G
HIGH VOLTAGE SPARK LEADCAUTION
FLAME SENSOR
ALARM
CONTACTS
RUN-TIME
CONTACTS
24 VAC LOUVER
RELAY COIL
LOUVER
PROVING SWITCH
GAS PRESSURE
SWITCH
FLOW
SWITCH
TANK
THERMOSTAT
11
12
13
14
15
16
17
18
19
20
SYSTEM
SENSOR
OUTDOOR
SENSOR
TANK
SENSOR
CASCADE
A
B
SHIELD
SHIELD
0-10V
+
-
BMS
IN
0-10V
+
-
SYS PUMP
IN
0-10V
+
-
BLR PUMP
OUT
0-10V
+
-
RATE
OUT
MODBUS
OPTION
A
B
SHIELD
SHIELD
LOW
WATER
CUT-OFF
24 VAC
COM
P/BK
Y
W/R
1
2
3
4
5
6
7
8
9
10
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
CN7-1
CN7-2
CN7-3
CN7-4
CN5-1
CN5-8
CN5-2
CN5-9
CN5-3
CN5-10
CN5-11
CN5-4
CN5-5
CN5-14
CN5-12
CN5-6
CN5-13
CN5-7
X5-7
X5-16
X5-8
X5-15
X5-9
X5-1
X5-2
X5-10
X5-11
X5-4
X5-12
X5-6
X5-5
X5-13
X5-14
X2-2
X2-1
BK
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.
WIRING DIAGRAM
LBL20169 REV C
BOX DEPICTS
OPTIONAL ITEMS
X4-7
X4-14
X4-6
X4-13
X4-5
X4-12
X4-11
X4-4
X4-3
X4-8
X4-10
X4-2
X4-9
X4-1
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
BK
CONNECTION BOARD
CN6
X6
HIGH VOLTAGE
LOW VOLTAGE
120 VAC
X-7
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
MODBUS BOARD
MTR-01
CN8-1
CN8-2
CN8-3
X6-3
X6-2
X6-1
X6-4
X9-1
X9-2
X9-3
X9-4
X4-1
X4-2
X4-3
X4-4
X5-1
X5-2
X1-1
X1-2
X1-3
BK
W
G
R
BL
G
-T
-T
-T
-T
SHIELD
GROUNDING
JUMPER
O
GY
G
R/BK
W/BK
GY
PR
1 2
G
3
BELL JUMPER
ALARM BELL
SILENCING SWITCH
JUNCTION
BOX
DHW
PUMP
BOILER
PUMP
SYSTEM
PUMP
BOX DEPICTS
OPTIONAL
ITEMS
G
G
G
L
GND
N
120V
SUPPLY
X1-3
X1-4
X1-2
X1-5
X1-6
X1-8
X1-1
BK
OR
W
W
W
BR
PR
W
L
N
L
N
L
N
L
N
O
AIR PRESSURE SWITCH
O/BK
HEAT/LOOP
DEMAND
3
HEAT/LOOP
DEMAND
2
HEAT/LOOP
DEMAND
1
7.000
9.250