Atag XL140 - 5.4 Connecting the boiler

Installation & Servicing instructions ATAG XL
15
5.4 Connecting the boiler
A. Remove the remaining packaging part from the bottom of the boiler.
Note: this packaging part is provided with boiler parts which are needed for
mounting the boiler.
B. Cap the connections that are not used on the pipe work headers:
 Flowandreturn: ø35mmblindcompressiontting (2items/boiler)
Gas: 1 ¼" blind cap with gasket (1 item/boiler)
For connections, use the supplied gaskets. Check all connections for leak-
age and gas-tightness.
C. Connecting the isolation valves to the boiler:
 Flow: 1½"atcouplingx35mmcompressionisolationvalvewithredhandle
 Return:1½"atcouplingx35mmcompressionttingcrossunionwith
  ll/drainvalveandisolationvalvewithbluehandle
The boiler is supplied with a 3 and 4 bar safety valve.
 ATAGUKrecommendttingthe4barsafetyvalveduetothecontrolsettingsshutting
theboilero󰀨at3.8bar.
Gas: 1¼" x 28mm gas isolation valve
Polluted test water may be released when removing the plastic caps on the
boiler ow and return.
For connections, use the supplied gaskets. Check all connections for leak-
age and gas-tightness.
D. Connect the valves to the pipe work headers:
 Flow: 35mmpipepieceswith35mmcompressionttings(elbowandsocket)
 Return:35mmpipepieceswith35mmcompressionttings(elbowandsocket)
 Gas: 28mmpipepiecewith1¼"atand28mmcompressiontting
Back-to-back installation:
 Flow: 35mmpipepieceswith35mmcompressionttings(bendandsocket)
 Return:35mmpipepieceswith35mmcompressionttings(bendandsocket)
 Gas: 28mmpipepiecewith1¼"atand28mmcompressiontting
For connections, use the supplied gaskets. Check all connections for leak-
age and gas-tightness.
E. Fillthesiphonwithtapwaterandtthesiphoncupunderneaththeboiler.
The siphon cup is supplied separately and can be found behind the housing.
Figure 5.4.b
Figure 5.4.c
Figure 5.4.d
Figure 5.4.a