Wiring Diagram - Lochinvar 81 - 286 Installation And Operation Manual

13
Diagrams
Figure 13-2 Wiring Diagram
ALARM
CONTACTS
RUN-TIME
CONTACTS
24 VAC LOUVER
RELAY COIL
LOUVER
PROVING SWITCH
GAS PRESSURE
SWITCH
FLOW
SWITCH
TANK
THERMOSTAT
HEAT/LOOP
1
DEMAND
HEAT/LOOP
2
DEMAND
HEAT/LOOP
3
DEMAND
SYSTEM
SENSOR
OUTDOOR
SENSOR
TANK
SENSOR
SHIELD
A
CASCADE
B
SHIELD
BMS +
0-10V
-
IN
SYS PUMP +
0-10V
-
IN
BLR PUMP +
0-10V
-
OUT
RATE +
0-10V
-
OUT
SHIELD
MODBUS A
OPTION
B
SHIELD
24 VAC
LOW
WATER
CUT-OFF
COM
SHIELD
GROUNDING
JUMPER
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.
78
LOW VOLTAGE
120 VAC
HIGH VOLTAGE
CONNECTION BOARD
1
2
3
4
5
6
7
CN5-1
BK
8
CN5-8 BK
9
BK
CN5-2
10
BK
CN5-9
CN5-3 BK
CN5-10
BK
CN5-11
BK
CN5-4 BK
CN5-5 BK
11
BK
12 CN5-14
13 CN5-12
BK
14 CN5-6 BK
BK
15 CN5-13
BK
16 CN5-7
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
CN6
33
34
35
36
37
38
39
40
41
42
43
44
CN7-1
CN7-2
CN7-3
CN7-4
R BL G
X4-1
X4-2
X4-3
MODBUS BOARD
X4-4
MTR-01
X5-1
X5-2
X1-1
X1-2
X1-3
Installation & Operation Manual
BOX DEPICTS
OPTIONAL ITEMS
BOX DEPICTS
DUAL SENSOR
SINGLE HOUSING
INTEGRATED
CONTROL
X-7 X1-3
OR
X1-4 BR
X1-2
X4-7 PR
X4-14
X4-6
X4-13
X4-5
KB ONLY
X4-12
ON/OFF
X4-11
SWITCH
X4-4
X1-6
BK
X4-3
X1-5
W
X4-8
X4-10
X4-2
X4-9
X1-8
G
X4-1
X1-1
R
BLOWER
1 2 3 4 5
X5-7 R
X6
T
X5-16
W
X5-8
X5-15 BK
Y
X5-9
X5-1 BL
O
X5-2
BLOCKED DRAIN SWITCH
X5-10 P
X5-11
O/BK
X5-4 R/BK
X5-12
GY
X5-6
P/BK
X5-5
W/BK
X5-13
PR
X5-14
Y
X2-2 BK
O
X9-1
Y
X2-1
GY X9-2
G X9-3
X1-7
FLAME SENSOR
W/R
X9-4
SPARK
TR2
CAUTION
BK
W
G
BOX DEPICTS
JUNCTION
OPTIONAL
BOX
ITEMS
L
DHW
G
PUMP
N
W
L
BOILER
G
PUMP
N
W
L
SYSTEM
G
PUMP
N
W
L
120V
L
GND
SUPPLY
N
N
TRANSFORMER
R W G
1 2 3
KB 286 ONLY
O-TEMP HEX SW
AIR PRESSURE SWITCH
-T
OPERATING SENSOR S1a
-T
HIGH LIMIT SENSOR S1b
-T
INLET SENSOR S2
-T
FLUE SENSOR S3a
-T
FLUE SENSOR S3b
GAS VALVE
@24VAC
G
ROD
HIGH VOLTAGE SPARK LEAD

WIRING DIAGRAM

LBL20127 REV C