28
PN 240012875 REV. D [03/15/2022]
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
ZONE 1
LINE
24V
Vac
L
C
R
115 Vac
N
L 1
N
115
COM
Vac
ZR
ZC
N
L
3
N
L
2
115 Vac
N
L
1
L
N
ZONE PUMPS
X
X
X
X
X
3
2
1
X
NE
C
C
las
s 2
Low
Vo
ltage
ZONE 3
ZONE 2
ZONE 1
W
R
NEC Class 2 Low Voltage
T
T C
THERMOSTATS
ZONE VALVES
ZONE 3
ZONE 2
4
3
2
1
4
3
2
1
4
3
2
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
Buffer Tank
115 Vac FIELD SUPPLIED
POWER PER NEC
AND LOCAL CODES
PRIMARY
PUMP
ZONE
THERMOSTATS
ZONE VALVES
VANNES DE ZONE
4 Wire Valve
1 2 3 4
1 2 3 4
CH
N L1
G
FIELD SUPPLIED
POWER PER NEC
AND LOCAL CODES
PUMP
DHW
PUMP
1
2
3
4
6
7
8
5
9
10
M2
Domestic Hot
Water Tank
UZ3
Zone Control
Summary of Contents for UTICA BOILERS MACF-115
Page 2: ...MACF 150...
Page 4: ...MAHF 125...
Page 77: ...73 A 1 MODEL 75 100 Heat Only APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 78: ...74 A 2 MODEL 125 Heat Only APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 79: ...75 APPENDIX A WIRING DIAGRAMS A 3 MODEL 165 Heat Only 240013503 REV A 03 15 2022...
Page 80: ...76 APPENDIX A WIRING DIAGRAMS A 4 MODEL 115 Combi 240013503 REV A 03 15 2022...
Page 81: ...77 A 5 MODEL 150 Combi APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 82: ...78 A 6 MODEL 205 Combi APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 117: ...33 PN 240012875 REV D 03 15 2022 MODEL 75 100 HEAT ONLY 75 100 HEAT ONLY WIRING DIAGRAM...
Page 118: ...34 PN 240012875 REV D 03 15 2022 MODEL 125 HEAT ONLY 125 HEAT ONLY WIRING DIAGRAM...
Page 119: ...35 PN 240012875 REV D 03 15 2022 MODEL 165 HEAT ONLY 165 HEAT ONLY WIRING DIAGRAM...
Page 120: ...36 PN 240012875 REV D 03 15 2022 115 COMBI WIRING DIAGRAM MODEL 115 COMBI...
Page 121: ...37 PN 240012875 REV D 03 15 2022 MODEL 150 COMBI 150 COMBI WIRING DIAGRAM...
Page 122: ...38 PN 240012875 REV D 03 15 2022 MODEL 205 COMBI 205 COMBI WIRING DIAGRAM...
Page 128: ...44 PN 240012875 REV D 03 15 2022 LOW WATER CUTOFF LOW WATER CUTOFF DETAIL NO NO YES...
Page 133: ...49 PN 240012875 REV D 03 15 2022 3 FAULT SOLUTION SECTIONS...