LAARS M4-Ext - Installation Manual - Manual (Page 4)

4
M4-CNC LAYOUT
LAARS Heating Systems
HT# 059104-00 B
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 12VA MAX
INPUT RATINGS:
USE COPPER CONDUCTORS ONLY
CAUTION : RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
99RA
SYSTEM
A
B
C
D
RUN PROGRAM
12 13 15 14 17 16 18 22 20 19 21 24 23
- + +
mA GND VLT
CUR / VLT
A
- + +
mA GND VLT - + +
mA GND VLT - + +
mA GND VLT
+
mA
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
OD= 25 o F SYS= 145 o F
<> B D
100% 52% --- ---
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
29 25 27 26 28 32 30 31
T T O O
TEMP
OUTDOOR
O O
TEMP
SYSTEM PROVE
/DHW
SHUTDOWN
/TSTAT
/SETBACK
1 2 3 4 5 6 7 8 9 10 11
L N RS-485
SYS A B C D PWR EXTENSION
MODULE
M4-CNC
CONDENSING AND NON-CONDENSING
The digital display shows the System and Outdoor temperatures,
the lead stage and lead group <>, and the status of
each stage. To view and adjust settings, press the appropriate buttons.
120VAC Power
Four N.O. Boiler startup relay
outputs. Each is wired in series
with each boiler's limit circuit.
System Output controls
pumps, valves, or other
system components.
Four modulation outputs can be 0-5V,
0-10V, 1-5V, 2-10V, or 4-20ma. Go to
Startup Menu to determine the type of
output for each stage.
LED indicates the
associated relay status.
Button functions are presented on
Bottom Row of display.
When connecting Outdoor and System
Sensors, no Polarity is observed.
Prove terminals must be connected for
the M4-CNC to operate the boilers.
Connect Extension panels to
add additional stages using
a phone style cable (cable
provided with M4-Extension).
Program Switch to restrict access to
function changes. This switch is
covered with the Wiring Enclosure.