LAARS Heating Systems
Page 42
R1
CONDENSATE
COM 1
COM 2
1
2
3
6
5
4
7
8
DISPLAY
C
B
A
J3 MB1
110 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
N/C
N/O
(OPTIONAL)
ENCLOSURE
3
1
2
4
HSI
R-4
PILOT
J1-3
FLAME ROD
MAIN
2
1
CIRCUIT BREAKER
+
-
110 VAC
220 VAC
FUSE
MAIN SWITCH
R2
CONVENIENCE RECEPTACLE
FUSE
1
2
3
4
5
J2-1
J2-2
J2-3
J2-4
BLOWER
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
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
J4-2
J4-4
J4-6
TB1-4A
TB1-4A
J6-3
R1
120V+
120V-
120V-
120V+
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
J5-6
J10-7
J9-1
J9-2
DISPLAY #5
J10-4
2
1
L1
L2
L2
L1
BLOWER MOTOR
120H
CONTACTOR
R2
T1
T2
L1
L2
BLOCK FLUE SWITCHES
LWCO
J7-2
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 1/19/15
S
AL 1/19/15
DECIMALS .X
.1
DECIMALS .XX
.03
DECIMALS .XXX
.010
ANGLES
1
TITLE:
FRACTIONS
1/8"
LADDER DIAGRAM, MGT 1.6,
220V
E23628
-
Figure 23. MGT 1600 220V ladder diagram