Multiple boilers wiring diagram, Page 33 laars sequencing controls s8 & s8ext, Unit1 – LAARS S8Ext - Installation Manual User Manual
Page 33: Unit1 pump system pump, Unit2, Unit2 pump, Unit3, Unit3 pump unit4 unit4 pump
Page 33
LAARS Sequencing Controls S8 & S8EXT
MULTIPLE BOILERS
WIRING DIAGRAM
Sensor Shiled
System Sensor
Shutdown Dry Contact
Unit1
Unit1
Pump
System
Pump
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
23 24
COMB.
AIR
DO NOT APPLY ANY VOLTAGE TO INPUT TERMINALS
COMB. AIR
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
C
US
Unit2
Unit2
Pump
Sensor Shiled
Outdoor Sensor
Unit3
Unit3
Pump
Unit4
Unit4
Pump
L
N
Prove Dry Contact
S8
SEQUENCING CONTROL