INSTALLATION AND OPERATION INSTRUCTIONS
6-4
SL 30-175, SL 45-260 MODULATING GAS BOILERS
6.2 Wiring diagraMs
Diagram 6.2-1: Ladder wiring diagram
CB
Input to Processor
Input to Processor
ELECTRICAL LADDER DIAGRAM
SL 20-115, 30-175, 45-260
Load 1 Contacts
Outdoor Sensor
Auxiliary Interlock (L.W.C.O., Air Proving, etc.) - Jumper if not used
Load 2 Contacts
Load 3 Contacts
Interlock 1
Therm. 1
Interlock 2
Therm. 2
Therm. 3
Outdoor S.
Indoor S.
2nd Loop S.
DHW S.
Boiler Net +
Ext. Cont. –
G
120Vac
L
N
IBC Control Board
Boiler Pump
CB-1
Yellow
White
CB-2
CB-3
CB-4
P/ V Power - L
P/ V Power - N
P/ V3 - N
P/ V3 - L
P/ V1 - N
P/ V1 - L
P/ V2 - N
P/ V2 - L
CB
Auxiliary Interlock (L.W.C.O., Air Proving, etc.) - Jumper if not used
Indoor Sensor
Secondary Loop Sensor
Domestic Hot Water Sensor
Interlock 1
Interlock 2
Therm. 1
Therm. 2
Therm. 3
Outdoor S.
Indoor S.
2nd Loop S.
DHW S.
Boiler Net –
Ext. Cont. +
White
Green
Black
To/From other IBC Boilers (must be twisted pair wire)
Input from external controls (by others, 4-20 mA or 0-10VDC only)
NOTE: All
sensors are
optional based
on the specific
application.
Fuse - 5A
Fuse - 5A
Fuse - 5A
Fuse - 5A
G1
Load Pump 1
Load Pump 2
Load Pump 3
G2
G3
G4
G5
G6
G7
G8
O1
O2
O3
O4
O5
O6
O7
O8
O9
O10
O11
O12
O13
O14
O15
O16
O17
O18
O19
O20
O21
O22
SL 20-115, 30-175, 45-260 Ladder Diagram
Summary of Contents for SL 30-175
Page 76: ...NOTES...
