LAARS M4-Ext - Installation Manual - Manual (Page 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
<> B 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
<> B D
100% 52% --- ---
Modulating Condensing
Group (Boiler 1 & 2)
{
Staginging
Non-Condensing
Group (Boiler 3 & 4)
{