Laars MagnaTherm MGH1600 Installation And Operation Instructions For page 46

8
Page 42
THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN ARE
PROPRIETARY TO LAARS HEATING SYSTEMS CO. AND SHALL NOT BE
REPRODUCED, TRANSFERRED TO OTHER DOCUMENTS, USED OR
DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY OTHER
PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING
BY LAARS HEATING SYSTEMS CO.
8.J Wiring Diagrams
(continued)
D
12 POS CONN "B"
TO LWCO PROBE AT HX
MAIN
VALVE
PILOT
VALVE
SPARK
IGNITOR
GENERATOR
16 POS CONN "A"
BLOCKED FLUE &
GND
BLOCKED INTAKE
*
C
CONDENSATE
HIGH GAS
LOW GAS
FLOW SWITCH
THERMAL
CUTOUT
ADDITIONAL
HIGH LIMIT
W
2
LWCO TO TB1-4C (120V N)
W
PROBE TO B4 (PROBE)
P1 P2
MANUAL RESET
B HIGH LIMIT
MAIN PWR
SWITCH
BK W
WIRE COLOR LEGEND
A
BK BLACK
BL BLUE
BR BROWN
WIRE VOLTAGE KEY
G GREEN
24V=
GY GRAY
OR ORANGE
120V=
R RED
14 kV=
V VIOLET
W WHITE
Y YELLOW
Figure 23. Wiring Diagram, Model 2000 thru Model 4000
8
7
FROM LWCO
"PROBE" TO PROBE
W
4
G
10
BK/R
5
BR
9
W/R
3
BK/Y
8
W/G
2
BK
7
W/V
1
8
15
7
BL/W
14
6
13
5
12
4
11
3
10
2
9
1
BK/OR
*
17 16 2 5
Blower VFD
VFD
Contacts
7
14 4 8
12
C
NC NO
9 13 1 5
A
1
2
W
3
4
5
6
7
8
Y
9
10
11
BL/Y
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
W
44
45
BK
1 2 3 4 5 6
6 POS CONN "E"
6
LAARS Heating Systems
Y
B C
TB1
G
GROUND
G
120V (N)
LWCO #2 120V (N)
120V (N)
120V (N)
BK
120V +
120V +
BK/W
24V NEUTRAL
Y
DISPLAY #7
24V NEUTRAL
Y
24V NEUTRAL
BK
BL
24V +
BL
BL
24V +
DISPLAY #8
24V +
BR/R
BOILER PUMP
W/V
BOILER PUMP
BR/G
SYSTEM PUMP
SYSTEM PUMP
BR/V
DHW PUMP
DHW PUMP
OUTDOOR/ BR
SYSTEM
OUTDOOR/ BR/Y
SYSTEM
OR/W
ANALOG (-)
OR
ANALOG (+)
BL
TT
BL
TT
W/R
ALARM
W/R
ALARM
BK
PUMP
W
0-10V
BL/W
DHW SENSOR
BL
DHW SENSOR
COM2-A BR/R DISPLAY #4
DISPLAY #5
COM2-B W/R
Y/R DISPLAY #6
COM2-C
J3-MB2A
MB2-A BR/G
J3-MB2B
MB2-B W/G
J3-MB2C
MB2-C Y/G
R/BN J10-1
REMOTE RESET
REMOTE/TOD J10-3
R/BK
COMMON
J10-2
R/BR
TOD TOD
4-20ma (+) V J10-4
4-20mA (-)
J10-6
V/W
0-110VDC (-)
J10-5
0-10VDC (+) V/BK
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