St A Rt Up Procedure; Central Heating System Connections - Heat Only; Central Heating System Connections - Com Bi - UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual

9 .1 Cent ra l H ea t ing Syst em Connect ions - H EAT ON LY
M AH F- 7 5 ,1 0 0 & 1 2 5 H EATI N G ON LY
WITH OPTI ON AL I N D I RECT D H W
CON N ECTI ON
A B D
M AH F- 7 5 ,1 0 0 ,1 2 5 H EATI N G ON LY
WITHOUT OPTI ON AL I N D I RECT D H W
CON N ECTI ON
A B
LEGEN D
Heat ing supply connect ion
A
Drain Connect ion for
B
condensat e
Gas shutoff connection
C
Opt ional I ndirect DHW
connect ion ( m ay exit right
D
or left )
Heat ing ret urn connect ion
E
9 - START U P PROCED U RE
C E
C E
7 5 / 1 0 0 / 1 2 5 1 6 5
11/4" sweat
11/2" sweat
[ 38.1 m m ]
[ 31.75 m m ]
3/ 4" NPT [ 22.2 m m ]
3/ 4" NPT [ 22.2 m m ]
3/ 4" sweat
NA
[ 22.2 m m ]
11/4" sweat 11/2" sweat
[ 31.75 m m ] [ 38.1 m m ]
9 .2 Cent ra l H ea t ing Syst em Connect ions - Com bi
M ACF- 1 1 5 , 1 5 0 & 2 0 5 COM BI ( 1 5 0 sh ow n )
A B C
LEGEN D
Heat ing supply
A
connect ion
DHW out let
B
Drain connect ion for
C
condensat e
Gas shutoff connection
D
E Cold DHW inlet t ap
Heat ing ret urn
F
connect ion
M AH F- 1 6 5 H EATI N G ON LY
WITHOUT I N D I RECT D H W CON N ECTI ON
A B
4 8
D E
7 5 / 1 0 0 / 1 1 5 / 1 5 0
11/2 " sweat
11/4 " sweat [31.75
m m ] [ 38.1 m m ]
1/ 2" sweat [ 12.7 3/ 4" sweat
m m ] [ 19.1 m m ]
3/ 4" NPT [ 22.2 m m ]
3/ 4" NPT [ 22.2 m m ]
1/ 2" sweat 3/ 4" sweat
[ 12.7
m m ] [ 22.2 m m ]
11/4 " sweat 11/2 " sweat
[ 31.75
m m ] [ 38.1 m m ]
C E
240013503 REV A, [ 03/ 15/ 2022]
F
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