Atag XL110 - Hot Water Supply

Installation & Servicing instructions ATAG XL
22
6.6 Hot water supply
The hot water supply control can be connected to the ATAG XL. For connection and
settings refer to the Boiler Control chapter.
Expansion DHW cylinder circuit
When connecting a DHW cylinder to the boiler before the low velocity header an ATAG
three way valve is recommended.
The circuit between the three way valve [A] and the separation device [B] between the
boilerandcylindershouldbeprovidedwithanexpansionvessel[C].Seegure6.6.b.
Figure 6.6.a
Figure 6.6.b
Boiler connection set with
3-way valve
C
B
A
Boiler type
XL70 XL110 XL140
Pump head for DHW
25 20 20
Cylinder ow connection 1 1/2" internal thread
Cylinder return connection 1" external thread
AX00380U
Boiler connection set with
3-way valve for XL in cas-
cade in combination with
DN65 and DN100 headers
Cylinder ow connection 1 1/2" internal thread
Cylinder return connection 1" external thread
AX00750U
Boiler connection set with
3-way valve Solo boiler
A. Three way valve
B. Separation device
C. Expansion vessel