Installation Manual

HT# 059104-00 B
Laars Condensing and Non-Condensing
Boiler Controls
Document 4217B
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

Output panel to Modulate and
Sequence up to 16 individual
stages with lead-lag and
manual override capabilities
 This product must be installed and serviced by a
professional service technician, qualied 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
certied as a high limit control, must be in the water heater/boiler control circuit.
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
RUNPROGRAM
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
<<A>> B <C> 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
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