Installation, Operation and Maintenance Instructions User guide
LAARS Heating Systems
Page 38
CONDENSATE
R1
4 78
COM 1 COM 2
123 65
DISPLAY
CBA
J3 MB1
110 VAC
24 VAC
J5-1
INTERLOCK
(+)
(-)
12
432 1432 1 432 1
3
1
2
VTB2
VTB6
VTB3
VTB5
VTB4
VTB1
24VAC POWER
VARIPRIME
COM
N/C
N/O
(OPTIONAL)
ENCLOSURE
4
HSI
R-4
PILOT
J1-3
FLAME
ROD
MAIN
2
1
L3
L2
L1
BLOWER
MOTOR
CIRCUIT BREAKER
CONTACTOR
R2
L1 L2
L1 L2
T3
T2
L1
L2
T1
VFD
+
-
110 VAC
220 VAC
FUSE
MAIN SWITCH
R2
CONVENIENCE
RECEPTACLE
FUSE
17
BLOCK FLUE
SWITCHES
VFD
TB 1-44
TB 1-45
1
2 5 6 25 4 11 13A 13B13C 14 30 16
*
L1
120H
120N
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
TB1-34C
TB1-33C
OUTLET
WATER
INLET
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,1.
THE SIGNAL MUST BE JUMPED
2. = USED ON SIZE 4.0 MMBh ONLY
J5-6
J10-7
J9-1
J9-2
DISPLAY #5
J10-4
2
1
L2
BY LAARS HEATING SYSTEMS.
220V
E23605
D
C
B
A
B
C
D
1
2
3
4
4
PROPRIETARY TO LAARS HEATING SYSTEMS AND SHALL NOT BE
SH
1/8"
DECIMALS .XX
3
2
1
FMA56A
DWG NO.
E23605
REV
ECN
DRAFT
-
AL 2-5-14
REVISIONS
REV.
CHANGE:
APPR
ENGR APPR
CHECK
INITIAL RELEASE
SOFTWARE
TOLERANCES ARE:
-
14-002N-13
JM 2-5-14
SCALE: NONE
INTENDED SIZE:
MATERIAL:
DWG. NO:
C
SHEET 1 OF 1
REV.
APPROVALS
DRAFT
ENGR
TITLE:
REPRODUCED, TRANSFERRED TO OTHER DOCUMENTS, USED OR
DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY OTHER
DIMENSIONS ARE IN INCHES.
FINISH
NA
JM 2-5-14
NA
1
S
APPR
.010
PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING
AL 2-5-14
UNLESS OTHERWISE SPECIFIED:
DO NOT SCALE DRAWING.
THIRD ANGLE PROJECTION.
DECIMALS .X .1
.03
DECIMALS .XXX
THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN ARE
ANGLES
FRACTIONS
LADDER DIAGRAM, MGT
-
Figure 20. 220 Volt Single Phase Ladder Diagram