Direct heating wiring diagram, Modulating and sequencing boilers, M4-cnc – LAARS M4-Ext - Installation Manual User Manual
Page 35: Installation manual 35
Installation Manual
35
MOdULATiNg ANd SEqUENCiNg BOiLERS
diRECT HEATiNg WiRiNg diAgRAM
Two 4-20mA Modulating
Condensing Boilers
and Two On/Off Non-
Condensing Boilers
Two voltage Modulating
Condensing Boilers
and Two On/Off Non-
Condensing Boilers
LAARS Modulating Controls M4 & M4-EXT
HT# 059104-00 B
Outdoor Sensor
System Sensor
Prove Jumper Do Not remove
Shield
Shield
Boiler 1
Boiler 2
Boiler 3
Boiler 4
Boiler 1
Boiler 2
4 - 20 mA
Signal Outputs
Outdoor Sensor
System Sensor
Prove Jumper Do Not remove
Voltage
Signal Outputs
L
N
System Pump
L
N
Shield
Shield
Boiler 1
Boiler 2
Boiler 3
Boiler 4
Boiler 1
Boiler 2
L
N
System Pump
L
N
SYSTEM
A
B
C
D
1 2
RUN
PROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3 4 5 6 7 8 9 10 11 12
13
15
14
17
16
18
22
20
19
21
24
23
29
25
27
26
28
32
30 31
L N
-
+
+
T
T
O
O
RS-485
mA
GND
VLT
SYS
A
B
C
D
PWR
CUR / VLT
A
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
+
mA
TEMP
OUTDOOR
O
O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
PROVE
/DHW
SHUTDOWN
/SETBACK
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
CAUTION
: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
/TSTAT
M4-CNC
CONDENSING / NON-CONDENSING CONTROL
OD=
25
o
F
SYS=
145
o
F
<<A>>
B
<C>
D
100%
52% ---
---
Modulating Condensing
Group (Boiler 1 & 2)
{
Staginging
Non-Condensing
Group (Boiler 3 & 4)
{
SYSTEM
A
B
C
D
1 2
RUN
PROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3 4 5 6 7 8 9 10 11 12
13
15
14
17
16
18
22
20
19
21
24
23
29
25
27
26
28
32
30 31
L N
-
+
+
T
T
O
O
RS-485
mA
GND
VLT
SYS
A
B
C
D
PWR
CUR / VLT
A
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
+
mA
TEMP
OUTDOOR
O
O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
PROVE
/DHW
SHUTDOWN
/SETBACK
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
CAUTION
: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
/TSTAT
M4-CNC
CONDENSING / NON-CONDENSING CONTROL
OD=
25
o
F
SYS=
145
o
F
<<A>>
B
<C>
D
100%
52% ---
---
Modulating Condensing
Group (Boiler 1 & 2)
{
Staginging
Non-Condensing
Group (Boiler 3 & 4)
{