MagnaTherm Boilers and Water Heaters
Page 55
VFD
TB 1-44
TB 1-45
1
2
5
6
25
4
11
13A
13B
13C
14
30
16
17
C
B
A
J3 MB1
PILOT
120 VAC
24 VAC
R1
CONDENSATE
COM 1
COM 2
1
2
3
6
5
4
7
8
DISPLAY
R-4
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
J1-3
FLAME ROD
R2
MAIN
2
1
CIRCUIT BREAKER
CONVENIENCE
RECEPTACLE
L3
L2
L1
BLOWER MOTOR
T3
T2
L1
L2
T1
VFD
CONTACTOR
R2
L1
T1
L2
T2
MAIN SWITCH
120V
240V
120V
240V
CIRCUIT BREAKER
CIRCUIT BREAKER
FAN
J5-6
SPARK
GENERATOR
SPARK IGNITOR
120V
N
120V
H
INLET WATER
1
2
J10-4
DISPLAY #5
J9-2
J9-1
J10-7
TB1-4A
DHW PUMP
SYSTEM PUMP
BOILER PUMP
1
4
2
3
J9-6
J9-5
J9-4
STACK
1
4
2
3
J8-5
J8-10
J8-4
J8-9
J8-8
OUTLET WATER
TB1-33C
TB1-35C
FLOW SWITCH
120V+
120V-
120V+
120V-
120V-
120V+
R1
J6-3
TB1-4A
TB1-4A
J4-6
J4-4
J4-2
J4-6
TB1-4A
TB1-4A
J4-4
J4-2
J8-12
J8-11
J8-7
J8-6
TB1-13
J8-3
{
BOILER PUMP
SYSTEM PUMP
{
DHW PUMP
{
OUTDOOR
SYSTEM
{
ANALOG
{
TT
{
FIELD CONNECTIONS
16
15
17
18
19
20
TB1-4A
21
22
23
24
+
25
26
28
27
{
ALARM
J6-7
J6-8
J10-2
TOD FEED
41
42
40
39
38
37
36
35
DISPLAY #4
34
33
32
31
29
30
{
REMOTE RESET
MB2
COM 2
{
DHW SENSOR
PUMP 0-10V
{
J10-3
MB2-C
MB2-A
DISPLAY #6
J10-6
4-20 ma 0-110VDC (-)
43
44
45
0-10VDC (+)
J10-5
-
+
4-20 ma (+)
+
+
-
+
-
VARIPRIME
ONLY
R3
J10-8
-
J10-1
MB2-B
VTB 3-3
VTB 3-4
120 NEUTRAL
(VARIPRIME ONLY)
VFD TERM 2
VFD TERM 5
VARIPRIME PUMP CONTROL MOUNTED ON HYDRONIC UNITS ONLY
J8-1
J8-3
J8-2
2
P2
P1
J4-8
J5-7
UNIT TEMPERATURE
SENSORS
J5-2
J4-10
J5-3
J7-6
J7-4
R3
CONDENSATE
MANUAL RESET
HIGH LIMIT
TB1-30
TB1-29
R4
OUTLET SENSOR
INLET
SENSOR
J7-3
LOW GAS
PRESSURE SW
PROBE
THERMAL CUT-OUT
J7-5
OPTIONAL ADDITIONAL HIGH LIMIT
J6-1
J6-2
+
+
_
_
HIGH GAS
PRESSURE SW
J7-2
LWCO
N/A
N/A
NOTE:
WHEN AN OPTIONAL COMPONENT IS NOT PRESENT,
1. THE SIGNAL MUST BE JUMPED
D
C
B
A
B
C
D
1
2
3
4
4
3
2
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
DWG NO.
E23604
SH
1
REV
A
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
JM 2-5-14
S
AL 2-5-14
DECIMALS .X
.1
DECIMALS .XX
.03
DECIMALS .XXX
.010
ANGLES
1
TITLE:
FRACTIONS
1/8"
LADDER DIAGRAM, MGT,
120V
E23604
A
PROJECT
0010
Figure 35. Model 2000, 120V ladder diagram
