Dunkirk DCB-125 - W;Indirect Zone Circulators & DHW Tank W;T-Stat - Wiring Diagram

12
ZONE 1
LINE
24V
Vac
L
C
R
115 Vac
NL
1
N
115
COM
Vac
ZRZC
NL
3
NL
2
115 Vac
N
L
1
L
N
ZONE CIRCULATOR
XXXXX
32
1
X
NEC Class 2 Low Voltage
ZONE 3
ZONE 2
ZONE 1
W
R
NEC Class 2 Low Voltage
T
T
C
THERMOSTATS
ZONE VALVES
ZONE 3ZONE 2
43214321432
1
NEC Class 2 Low Voltage (24Vac)
W
R
T
T
C
W
R
T
T
C
PRI PUMP ZC/ZR
DIGITAL LCD USER DISPLAY
Fuse
ZONE MODULE
TO EXPANSION
Transformer
PTC
12A 250V
115 Vac FIELD SUPPLIED
POWER PER NEC
AND LOCAL CODES
Z2 Z3
ZONE
T-STATS
12345678910
VAC
24
M2
M2 terminal strip
G
*
on boiler
Domestic Hot
Water Tank
100 & 125 W/ INDIRECT ZONE CIRCULATORS &
DHW
TANK W/T-STAT, ARGO UZ3 ZONE CONTROL
WIRING DIAGRAM
Reference zone control manufacturer instructions for details on setting priority if necessary.
If adding an indirect tank with Thermostat to a Heating Only Boiler, change P03 from 08 to 04. See Section 9, Parameter Settings in Boiler Installation, Operation & Maintenance Manual for details.
100, 125 W/INDIRECT ZONE CIRCULATORS & DHW TANK W/T-STAT - WIRING DIAGRAM
UZ3
PN 240011430 REV. O [07/01/2021]