LAARS M4-Ext - Installation Manual - Manual

Laars Modulating Controls
Document 4211A
Modulating
Model M4 and M4-Ext
Output panel to Modulate
up to 16 individual
stages with lead-lag and
manual override capabilities
FOR YOUR SAFETY: This product must be installed and serviced by a
professional service technician, qualified in hot water heater/boiler controls
installation and maintenance. This manual is intended for anyone who will
install, operate or maintain the control system. Before you begin installation
and operation of this control, it is important that you thoroughly review this
manual. Improper installation and operation could result in damage to
equipment and possibly even personal injury. Laars Sequencing Controls are
not intended for use as operation safety limit controls. Another control, that is
intended and certified as a high limit control, must be in the water heater/boiler
control circuit.
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
1 2
RUN PROGRAM
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
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
CLASS 1 WIRE ONLY.
--- ---
PROVE
/DHW SHUTDOWN /SETBACK
ENCLOSED ENERGY MANAGEMENT
EQUIPMENT LISTED 99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
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 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
22
- 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.
ENCLOSED
ENERGY MANAGEMENT EQUIPMENT
LISTED 99RA
CAUTION: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
M4
FULL MODULATION SEQUENCING