MagnaTherm Boilers and Water Heaters
Page 41
R1
CONDENSATE
COM 1
COM 2
1
2
3
6
5
4
7
8
DISPLAY
C
B
A
J3 MB1
120 VAC
24 VAC
J5-1
INTERLOCK
4
3
2
1
1
2
4
3
2
1
4
3
2
1
VTB2
VTB6
VTB3
VTB5
VTB4
VTB1
24VAC POWER
VARIPRIME
COM
ENCLOSURE
3
1
2
4
HSI
R-4
PILOT
J1-3
FLAME ROD
R2
MAIN
2
1
CIRCUIT BREAKER
CONVENIENCE
RECEPTACLE
120V
220V
FUSE
FUSE
CONTACTOR
R2
L1
T1
L2
T2
MAIN SWITCH
1
2
3
4
5
J2-1
J2-2
J2-3
J2-4
BLOWER
BLOCK FLUE SWITCHES
LWCO
J7-2
HIGH GAS
PRESSURE SW
_
_
+
+
J6-2
J6-1
OPTIONAL ADDITIONAL HIGH LIMIT
J7-5
THERMAL CUT-OUT
PROBE
LOW GAS
PRESSURE SW
J7-3
INLET
SENSOR
OUTLET SENSOR
R4
TB1-29 TB1-30
MANUAL RESET
HIGH LIMIT
CONDENSATE
R3
J7-4
J7-6
J5-3
J4-10
J5-2
UNIT TEMPERATURE
SENSORS
J5-7
J4-8
P1
P2
2
J8-2
J8-3
J8-1
VARIPRIME PUMP CONTROL MOUNTED ON HYDRONIC UNITS ONLY
120 NEUTRAL
(VARIPRIME ONLY)
VTB 3-4
VTB 3-3
MB2-B
J10-1
-
J10-8
R3
VARIPRIME
ONLY
-
+
-
+
+
4-20 ma (+)
+
-
J10-5
45
44
43
J10-6
DISPLAY #6
MB2-A
MB2-C
J10-3
{
PUMP 0-10V
DHW SENSOR
{
COM 2
MB2
REMOTE RESET
{
30
29
31
32
33
34
DISPLAY #4
35
36
37
38
39
40
42
41
TOD FEED
J10-2
J6-8
J6-7
ALARM
{
27
28
26
25
+
24
23
22
21
TB1-4A
20
19
18
17
15
16
FIELD CONNECTIONS
{
TT
{
ANALOG
{
OUTDOOR
SYSTEM
{
DHW PUMP
{
SYSTEM PUMP
BOILER PUMP
{
J8-3
TB1-13
J8-6
J8-7
J8-11
J8-12
J4-2
J4-4
TB1-4A
TB1-4A
J4-6
J4-2
J4-4
J4-6
TB1-4A
TB1-4A
J6-3
R1
120V+
120V-
120V-
120V+
120V-
120V+
FLOW SWITCH
TB1-35C
TB1-33C
OUTLET WATER
J8-8
J8-9
J8-4
J8-10
J8-5
3
2
4
1
STACK
J9-4
J9-5
J9-6
3
2
4
1
BOILER PUMP
SYSTEM PUMP
DHW PUMP
TB1-4A
NOTE:
WHEN AN OPTIONAL COMPONENT IS NOT PRESENT THE SIGNAL MUST BE JUMPED
1.
J5-6
J10-7
J9-1
J9-2
DISPLAY #5
J10-4
INLET WATER
120V
H
120V
N
N
L
BLOWER MOTOR
PE
THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN ARE PROPRIETARY TO LAARS HEATING SYSTEMS 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.
FMA56A
SCALE: NONE
INTENDED SIZE:
SOFTWARE
DWG. NO:
C
SHEET 1 OF 1
REV.
APPROVALS
DRAFT
ENGR
APPR
UNLESS OTHERWISE SPECIFIED:
DO NOT SCALE DRAWING. THIRD ANGLE PROJECTION. DIMENSIONS ARE IN INCHES.
TOLERANCES ARE:
MATERIAL:
FINISH
NA
NA
JAT 1/16/15
S
AL 1/16/15
DECIMALS .X
.1
DECIMALS .XX
.03
DECIMALS .XXX
.010
ANGLES
1
TITLE:
FRACTIONS
1/8"
LADDER DIAGRAM, MGT 1.6,
110V
E23627
-
Figure 22. MGT 1600 110V ladder diagram
8.7 Ladder Diagrams