Atag Q 25S - Page 9

Installation & Servicing Instructions ATAG Q-Series
9
Solo Combi
Boiler type
Q25S
Q38S
Q51S
Q60S
Q25C
Q38C
Q51C
Combustion air supply / flue gas
system
mm 80/125 80/125 80/125 80/125
Gas pipe - g
½" female ¾" female ½" female ¾" female
Flow pipe - f
mm
28 35
28 35
Return pipe - r
mm 28 35 28 35
Condensate pipe - c
mm 24 24 24 24
Expansion pipe - e
mm 22 22
Cold water pipe - k
mm 15 15
Hot water pipe - w
mm 15 15
Return pipe DHW - d
mm 28
connection diameters table 2
boiler connections gure 2
g a r c e k w
g a r c