LAARS S8Ext - Installation Manual User Manual
Laars sequencing controls, Sequencing model s8 and s8ext, For your safety
Laars Sequencing Controls
Document 4213
Sequencing
Model S8 and S8Ext
Output panel to Sequence
up to 24 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.
SYSTEM
DHW PUMP
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION:
Risk of Electric Shock.
PWR
L N
1 2
SENSORS MUST BE GOLD SERIES
SYSTEM
3
DHW
PUMP
5
Stage A
7
Stage B
9
Stage C
11
13
Stage E
15
Stage F
17
Stage D
6
8
10
12
14
16
18
RS485
SYS=
144
F OD=
35
F
<AB > DE
GH
JK
HI LO -- OFF
4
Stage G
19
Stage H
21
OUTDOOR
TEMP
27
29
31
DHW
33
SHUTDOWN
/SETBACK
35
RETURN
TEMP
20
22
28
30
32
34
36
STAGE
MENU
Stage E
Stage F
Stage G
Stage H
Stage A
Stage B
Stage C
Stage D
25
26
PRESS
+ -
37
38
PROVE
SYSTEM
TEMP
PROGRAM
RUN
OUTPUT RATING: 6 AMP RESISTIVE, 1 AMP PILOT DUTY PER OUTPUT AT 120VAC.
23 24
COMB.
AIR
DO NOT APPLY ANY VOLTAGE TO INPUT TERMINALS
COMB. AIR
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
C
US
S8
SEQUENCING CONTROL