LAARS M4-Ext - Installation Manual - Manual (Page 13)

Installation Manual 13
WiRiNg THE BOiLERS
• When wiring condensing and non-condensing boilers make sure that condensing boilers utilize the first stages
and non-condensing boilers will utilize the following stages. That is, if the installation had two condensing
modulating boilers and two non-condensing staging On/Off boilers, Stage A and B will be used by the condensing
boilers while C and D will be used by the non-condensing boilers.
WiRiNg ON/OFF BOiLER OUTPUTS
(A TERMinALS 5, 6), (B TERMinALS 7, 8), ...
• Each boiler output (A through D) has one Normally Open (N.O.) relay contact.
• The N.O. contacts are dry contacts only. They do not source any voltage.
• Wire the N.O. relay contacts in series with the unit’s limit circuit.
• Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring.
• Note that some modulating boilers may not require the use of these outputs.
SYSTEM
A
B
C
D
Condensing / Non-Condensing Control
1 2
RUN PROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
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
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PROVE
/DHW
SHUTDOWN
/TSTAT
/SETBACK
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
OD= 25 o F SYS= 145 o F
<<A>> B
100% 52%
Mini-MOD-CNC
Boiler Enable
Output
Boiler
WiRiNg MULTi-STAgE BOiLER OUTPUTS
(A TERMinALS 5, 6, 7, 8), ...
• Each stage output (A through D) has one Normally Open (N.O.) relay
contact that does not source any power.
• Wire each of the N.O. relay contacts to its respective boiler stage.
Note that on the display of the M4-CNC each staging boiler will
consist of multiple letters. The letters represent outputs that should
be wired to that boiler. The first letter should be wired to the lowest
firing stage and the next letter to the next stage and so on. See "Boiler
Status" on page 30.
• Class 1 voltages must enter the enclosure through a different opening
from any Class 2 voltage wiring.
OD=
55
o F SYS=
142
o F
<CD> EF
LO ---
STAGE ◄ ► MENU
SYSTEM
A
B
C
D
Condensing / Non-Condensing Control
1 2
RUN PROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
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
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PROVE
/DHW
SHUTDOWN
/TSTAT
/SETBACK
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
OD=
25 o F SYS=
145 o F
<<A>> B
100% 52%
Mini-MOD-CNC
2-Stage Boiler
Stage1 Stage2
WiRiNg TO MOdULATiNg OUTPUT
The M4-CNC can modulate any combination of the following boiler signals. The Modulating Output Type must
be selected properly before connecting any output wires to avoid damaging components. See "Modulating Output
Type" on page 18. Some modulating boilers may require the use of the relay stage outputs. See "Wiring the Boilers"
WiRiNg THE 4-20MA MOdULATiNg MOTORS
(A TERMinALS 13, 14), (B TERMinALS 16, 17),...
• The M4-CNC can operate up to four 4-20 mA modulating motors.
• The M4-Extension can operate up to six 4-20 mA modulating motors.
• The M4-CNC and the M4-Extension sources 24VDC excitation voltage for the 4-20mA signal.
• Wire the (-) from the modulating motor to the boiler terminal on the M4-CNC marked (GND). That is for boiler
A, the modulating (-) terminal will be 13.
• Wire the (+) from the modulating motor to the boiler terminal on the M4-CNC marked (mA). That is for boiler A,
the modulating (-) terminal will be 14.
SYSTEM
A
B
C
D
Condensing / Non-Condensing Control
1 2
RUN PROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
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
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PROVE
/DHW
SHUTDOWN
/TSTAT
/SETBACK
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
OD= 25 o F SYS= 145 o F
<<A>> B
100% 52%
Mini-MOD-CNC
Boiler 4-20mA
Modulation Output
4-20mA
Burner
Motor
- +
WiRiNg THE vOLTAgE MOdULATiNg MOTORS
(A TERMinALS 13, 15), (B TERMinALS 16, 18),...
• The M4-CNC can operate up to four 0-5V, 0-10V, 1-5V, or 2-10V modulating motors.
• The M4-Extension can operate up to six 0-5V, 0-10V, 1-5V, or 2-10V modulating motors.
• Wire the (GND) from the modulating motor to the boiler terminal on the M4-CNC marked (GND). That is for
boiler D, the modulating (GND) terminal will be 22.
• Wire the (V+) from the modulating motor to the boiler terminal on the M4-CNC marked (VLT+). That is for
boiler D, the modulating (V+) terminal will be 23.
SYSTEM
A
B
C
D
Condensing / Non-Condensing Control
1 2
RUN PROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
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
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
PROVE
/DHW
SHUTDOWN
/TSTAT
/SETBACK
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
OD= 25 o F SYS= 145 o F
<<A>> B
100% 52%
Mini-MOD-CNC
Boiler Voltage
Modulation Output
Voltage
Burner
Motor
GND V+
ALERT
To set the M4-Extension to a specific letter, remove the wiring cover and switch the Ext A/Ext B
to the desired letter. DO NOT set both extensions to the same letter to avoid errors.
LAARS Modulating Controls M4 & M4-EXT
HT# 059104-00 B