Start Up Procedure; Central Heating System Connections - Combi - UTICA BOILERS MAHF-100 Manual

9.1
Central Heating System Connections
MAHF- 100 & 125 HEATING ONLY
WITH OPTIONAL INDIRECT DHW
CONNECTION
A B
MAHF-125HEATING ONLY
WITHOUT OPTIONAL INDIRECT DHW
CONNECTION
A B
LEGEND
Heating supply connection
A
Drain Connection for
B
condensate
Gas shutoff connection
C
Optional Indirect DHW
connection (may exit right
D
or left)
Heating return connection
E

9 - START UP PROCEDURE

- HEAT ONLY
D C
C
100 / 125
11/4" sweat
[38.1 mm]
[31.75 mm]
3/4" NPT [22.2 mm]
3/4" NPT [22.2 mm]
3/4" sweat
[22.2 mm]
11/4" sweat 11/2" sweat
[31.75 mm] [38.1 mm]

9.2 Central Heating System Connections - Combi

MACF- 115, 150 & 205 COMBI (150 shown)
A B
E
Heating supply connection
A
DHW outlet
B
Drain connection for
C
condensate
Gas shutoff connection
D
Cold DHW inlet tap
E
Heating return connection
F
WITHOUT INDIRECT DHW CONNECTION
E
165
11/2" sweat
NA
A
46
C D
LEGEND 115 / 150
11/4 " sweat
[31.75 mm]
1/2" sweat
[12.7 mm]
3/4" NPT [22.2 mm]
1/2" sweat
[12.7 mm]
11/4 " sweat
[31.75 mm]
MAHF-165 HEATING ONLY
B C
240013371 REV B, [10/01/2021]
E F
205
11/2 " sweat
[38.1 mm]
3/4" sweat
[19.1 mm]
3/4" NPT [22.2 mm]
3/4" sweat
[22.2 mm]
11/2 " sweat
[38.1 mm]
E