Laars MagnaTherm MGH1600 Installation And Operation Instructions Manual page 38

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Page 34
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.
D
12 POS CONN "B"
TO LWCO PROBE AT HX
MAIN
VALVE
PILOT
VALVE
HSI
16 POS CONN "A"
BLOCKED FLUE &
GND
BLOCKED INTAKE
*
C
CONDENSATE
HIGH GAS
LOW GAS
FLOW SWITCH
THERMAL
CUTOUT
ADDITIONAL
HIGH LIMIT
W
2
TO TB1-4C (120V N)
LWCO
W
TO B4 (PROBE)
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
V VIOLET
W WHITE
Y YELLOW
Figure 16. Wiring Diagram, MGT 2000 thru MGT 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
VFD
7
12 14 4 8
C
NC NO
13 1 5
9
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
24V NEUTRAL DISPLAY #7
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
BR/Y
OUTDOOR/
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
BR/R DISPLAY #4
COM2-A
DISPLAY #5
W/R
COM2-B
DISPLAY #6
COM2-C Y/R
J3-MB2A
BR/G
MB2-A
J3-MB2B
MB2-B W/G
MB2-C Y/G J3-MB2C
J10-1
REMOTE RESET R/BN
REMOTE/TOD J10-3
R/BK
COMMON
R/BR J10-2
TOD TOD
4-20ma (+) J10-4
V
4-20mA (-)
J10-6
V/W
0-110VDC (-)
0-10VDC (+) V/BK J10-5
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