Installation, Operation and Maintenance Instructions User guide
MagnaTherm Boilers and Water Heaters
Page 39
CONDENSATE
R1
54 78
COM 1 COM 2
123 6
DISPLAY
ACB
J3 MB1
120 VAC
24 VAC
J5-1
INTERLOCK
1
(+)
(-)
2
243 1243 1 243 1
ENCLOSURE
3
1
2
VTB2
VTB6
VTB3
VTB5
VTB4
VTB1
24VAC POWER
VARIPRIME
COM
N/C
N/O
(OPTIONAL)
4
HSI
R-4
PILOT
J1-3
FLAME
ROD
R2
MAIN
2
1
CIRCUIT BREAKER
CONVENIENCE
RECEPTACLE
120V 220V
L3
L2
L1
BLOWER
MOTOR
L1
L2
T1
T3
T2
VFD
FUSE
FUSE
CONTACTOR
R2
L1 T1
L2 T2
MAIN SWITCH
16 17
BLOCK FLUE
SWITCHES
VFD
TB 1-44
TB 1-45
1
2 5 6 25 4 11 13A 13B13C 14 30
*
INLET
OUTLET
WATER
J8-8
J8-9
J8-4
J8-10
J8-5
3
2
4
1
WATER
120V
120V
H
N
1
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
J8-2J8-3
J8-1
VARIPRIME PUMP CONTROL
MOUNTED ON
HYDRONIC UNITS ONLY
VFD TERM 5
VFD TERM 2
120 NEUTRAL
(VARIPRIME ONLY)
VTB 3-4
VTB 3-3
MB2-B
J10-1
-
J10-8
R3
VARIPRIME
ONLY
-
+
-
+
+
4-20 ma (+)
+
-
J10-5
0-10VDC (+)
45
44
43
4-20 ma
0-110VDC (-)
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
VFD-16 VFD-17
*
*
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
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,1.
THE SIGNAL MUST BE JUMPED
= USED ON SIZE 4.0 MMBh ONLY2.
J5-6
J10-7
J9-1
J9-2
DISPLAY #5
J10-4
2
E23604
D
C
B
A
B
C
D
1
2
3
4
43
2
110V
1/8"
1
BY LAARS HEATING SYSTEMS.
FMA56A
DWG NO.
E23604
SH
1
REV
-
AL 2-5-14
REVISIONS
REV.
CHANGE:
APPR
ENGR APPR
ECN
DRAFT
CHECK
RELEASE
-
14-002N-13
JM 2-5-14
SCALE: NONE
INTENDED SIZE:
SOFTWARE DWG. NO:
C
SHEET 1 OF 1
REV.
APPROVALS
DRAFT
ENGR
APPR
UNLESS OTHERWISE SPECIFIED:
PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING
DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY OTHER
DIMENSIONS ARE IN INCHES.
TOLERANCES ARE:
MATERIAL:
FINISH
NA
NA
JM 2-5-14
S
AL 2-5-14
DO NOT SCALE DRAWING.
THIRD ANGLE PROJECTION.
.1 DECIMALS .X
.03DECIMALS .XX
.010
REPRODUCED, TRANSFERRED TO OTHER DOCUMENTS, USED OR
PROPRIETARY TO LAARS HEATING SYSTEMS AND SHALL NOT BE
DECIMALS .XXX
TITLE:
THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN ARE
ANGLES
FRACTIONS
LADDER DIAGRAM, MGT,
-
Figure 21. 110 Volt Single Phase Ladder Diagram