22
Installation
Connecting the boiler
1-2. Keep the cap on the connections
that are not used on the flow and
return headers:
Flow and return: 2" blind cap with
gasket (2 items/boiler).
Gas: 1 ¼" blind cap with gasket
(1 item/boiler).
For connections, use the supplied
gaskets. Check all connections for
leakage and gas-tightness.
3. Connect the valves to the flow and
return headers:
Flow: 45mm pipe pieces with 2" flat
coupling, 2" flat coupling isolation
valve with red handle.
Return: 45mm pipe pieces with 2"
flat coupling, 2" flat coupling fitting
cross union with fill/drain valve and
isolation valve with blue handle.
The boiler is supplied with a 3 and
6 bar safety valve.
ATAG recommends fitting the
6 bar safety valve due to the control
settings shutting the boiler off at
6 bar.
Gas: 28mm short gas pipe with
1 1/4" flat sealing and 28mm
compression fitting with 1¼" gas
isolation valve.
Dirty test water may be released
when removing the plastic caps on
the boiler flow and return.
For connections, use the supplied
gaskets. Check all connections for
leakage and gas-tightness.
4. Connect the pipes to the boiler:
Flow: 45mm pipe pieces with 2" flat
coupling.
Return: 45mm pipe pieces with
2" flat coupling.
Gas: 28mm pipe piece with 1¼" flat
coupling.
5. Connect the pipes to the valves
Flow: 45mm pipe pieces with
2" flat coupling.
Return: 45mm pipe pieces with 2"
flat coupling.
Gas: 28mm pipe piece with 1¼" flat
coupling.
For connections, use the supplied
gaskets. Check all connections for
leakage and gas-tightness.
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