Dunkirk DCBF-100 Manual page 111

Buffer Tank
CH
PUMP
G N L1
FIELD SUPPLIED
POWER PER NEC
AND LOCAL CODES
EXTERNAL BUFFER TANK - WIRING DIAGRAM
Buffer Tank Pump Wiring
Controlling A Primary Pump On A Combi Boiler
With Zone Valves and Indirect Tank With Priority,
Argo UZ3 and AR822-II Zone Controls
M2
1
2
Domestic Hot
3
4
5
6
7
8
9
10
ZONE
THERMOSTATS
Water Tank
THERMOSTATS
ZONE 1 ZONE 2
T T C T T C
R W R W
NEC Class 2 Low Voltage
DIGITAL LCD USER DISPLAY
28
ZONE VALVES
VANNES DE ZONE
4 Wire Valve
1 2 3 4
ZONE VALVES
ZONE 3
ZONE 1 ZONE 2
T T C
R W
1 2 3 4 1 2 3 4 1
NEC Class 2 Low Voltage (24Vac)
TO EXPANSION
ZONE MODULE
UZ3
Zone Control
115 Vac
ZONE PUMPS LINE
PRI PUMP ZC/ZR
L 1 N 1 2 3
L L
N L N L N
ZC ZR 115 Vac
115 Vac FIELD SUPPLIED
POWER PER NEC
PRIMARY DHW
AND LOCAL CODES
PUMP PUMP
PN 240012875 REV. B [07/01/2021]
1 2 3 4
ZONE 3
2 3 4
Transformer
COM C
24V
R
Vac
12A 250V
Fuse
L
115
Vac
N
N